Movable Or Adjustable Doctoring Edge Patents (Class 118/413)
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Patent number: 7309402Abstract: A doctor blade holder comprises upper and lower mutually spaced jaw components defining a slot. A doctor blade is removably retained in the slot, and nozzles in one of the jaw components are arranged to direct fluid under pressure into the slot for application to the doctor blade.Type: GrantFiled: September 7, 2004Date of Patent: December 18, 2007Assignee: Kadant Web Systems, Inc.Inventors: Robert A. Reid, Bilal Mehmood
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Patent number: 7303634Abstract: The apparatus has a feed apparatus (10) and an evening-out apparatus (100) placed underneath the feed apparatus. The feed apparatus (10) has a feed chamber (12) with an inlet opening (13a), an outlet opening (13b), and a nozzle plate (18) with holes (19) and communicating with the outlet opening (13b) of the feed chamber. The evening-out apparatus (100) has at least one inclined surface (110) which forms a downwards sloping flow path (L1) for the treating agent. Jets discharge from the feed chamber (12) outlet opening (13b) through the nozzle plate (18) holes (19) to form a first treating agent flow (F1). One inclined surface (110) of the evening-out apparatus (100) receives the first treating agent flow (F1) and a second treating agent flow (F2) formed into an even laminar treating agent flow on the flow path (L1) of the evening-out apparatus (100) is passed onto a moving surface (200).Type: GrantFiled: January 15, 2003Date of Patent: December 4, 2007Assignee: Metso Paper, Inc.Inventor: Rauno Rantanen
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Publication number: 20070187057Abstract: A device for the detachable fixing of a holder for a doctor blade located in a paper production plant, it being possible for the doctor blade, which is assigned to a supporting or guiding roll for the wire, for the felt or for the paper web, to be set in its position with respect to the supporting or guiding roll by way of an actuating device and, furthermore, it being possible for the holder for the doctor blade to be displaced on a support for the holder by way of a guide at least approximately in the axial direction of the supporting or guiding roll and fixed on the support in the operating position. A pressure hose is disposed between the holder for the doctor blade and the support. The pressure hose allows the holder for the doctor blade to be clamped to the support.Type: ApplicationFiled: January 24, 2007Publication date: August 16, 2007Inventors: Klaus Bartelmuss, Heinz Bartelmuss
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Patent number: 7220317Abstract: A drywall hopper assembly that contains a double blade that can apply drywall mud to both interior and exterior drywall corners with no blade change. A zig-zag blade can contain two parallel grooves, one for interior corners and one for exterior corners. With this blade arrangement, an operator can quickly move from one type of corner to another without using multiple tools, multiple blades or hand application methods to apply mud. The present invention can contain a pliable release port to present mud equally to an interior or an exterior corner. There can be such a port on both the top and bottom of the blade so that mud is smoothly applied as the operator moves the tool along the seam.Type: GrantFiled: December 27, 2003Date of Patent: May 22, 2007Inventor: Timothy D. Smythe
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Patent number: 7211297Abstract: An fountain applicator for applying coating liquid onto a web of paper carried past the applicator, has a coating liquid flow path that includes a curved surface along which a sheet of the coating liquid is flowed to subject the sheet to centrifugal force to cause air entrained in the coating liquid to move away from one side of the sheet that is toward the curved surface, so that the one side is relatively free of entrained air. After being flowed along the curved surface, the sheet of coating liquid is directed toward the web in a free standing jet curtain of coating liquid, to contact the web surface primarily with the one relatively air-free side of the coating liquid sheet to decrease the occurrence of skip coating on the web surface, especially when the web is traveling past the applicator at high speeds. The coating is applied in excess onto the web surface and is metered and leveled to a desired coat weight by a downstream doctor.Type: GrantFiled: July 9, 2003Date of Patent: May 1, 2007Assignee: Stora Enso North America Corp.Inventor: Wayne A. Damrau
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Patent number: 7192485Abstract: A device (510) for the direct or indirect application of liquid or pasty application medium (516) by means of an applicator unit (512) to a material web (520), in particular of paper or board, comprises a device (570) upstream of the applicator unit (512) in the running direction (L) of the substrate (U) in order to attenuate the air boundary layer (G) carried along by the substrate (U). The attenuation device can in this case comprise a sealing element (570) which is pressed in a sealing manner against the substrate (U) and rolls on the latter substantially without slippage, and/or can comprise an electrode arrangement and/or can comprise an ultrasound source and/or can comprise a resilient diaphragm element acting without contact.Type: GrantFiled: June 10, 2004Date of Patent: March 20, 2007Assignee: Voith Paper Patent GmbHInventors: Bernert Richard, Méndez-Gallon Benjamin, Ueberschär Manfred
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Patent number: 7175742Abstract: In a doctor blade, which suppresses abrasion of a mating member and excels in water removal capability and shape retention capacity over a long time, resin is impregnated into a fibrous laminate composed of base materials and batt layers integrated by needle punching, and an adjustment is made so that the void content is between 50% and 80%.Type: GrantFiled: September 17, 2002Date of Patent: February 13, 2007Assignee: Ichikawa Co., Ltd.Inventors: Tetsuo Takeuchi, Hirofumi Ishii
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Patent number: 7169230Abstract: A coater apparatus (10) is disclosed for applying coating material onto a moving web. The apparatus (10) includes an applicator having a first and a second end, the applicator (16) defining a feeding chamber (22) for the reception therein of the coating material (12). The applicator (16) includes a fixed lip (24) which extends from the feeding chamber (22) towards the web (14). A movable lip (26) extends from the feeding chamber (22) such that when the movable lip (26) is disposed in a first disposition thereof, the movable lip (26) cooperates with the fixed lip (24) for defining therebetween a slot for guiding the coating material (12) from the feeding chamber (22) towards the moving web (14). However, when the movable lip (26) is pivoted away from the fixed lip (24) to a second and third disposition thereof, flushing and cleaning of the applicator (16) is permitted.Type: GrantFiled: January 24, 2003Date of Patent: January 30, 2007Assignee: PHT Italia S.p.A.Inventors: Luca Ghelli, Corrado Turinetti, Giorgio Baldins
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Patent number: 7033459Abstract: An arrangement for doctoring a belt or a soft roll surfacing in a paper or board machine includes a doctor set in connection with a surface with a doctor blade fitted in it for doctoring the surface. The doctor blade is at least partly of a material, the hardness of which is essentially equal to or less than the hardness of the material of the surface, in order to prevent the doctor blade from cutting into the surface. The material is arranged to form a layer extending over the entire width of the doctor blade, and the thickness of which throughout is at least half of the thickness of the doctor blade. A support construction is arranged in the doctor blade, which together with the layer is arranged to form the doctor blade.Type: GrantFiled: June 12, 2002Date of Patent: April 25, 2006Assignee: Metso Paper, Inc.Inventors: Ilkka Rata, Juhani Vestola
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Patent number: 6982025Abstract: An adjustable resilient blade support for use in the forming section of a papermaking machine. The blade support is adjustable, both to allow the attached blade to be moved from a position where it is out of contact to a position where it is pressed into contact with the adjacent forming fabric, and to permit adjustment of the blade orientation relative to the surface of the forming fabric. The blade support is also resilient, and thus allows the blade to respond to transient localized changes in the path of the forming fabric with which it is in contact. The adjustable resilient blade support of this invention is thus of use in an open surface forming section, and also is of use in forming sections in which two forming fabrics are used.Type: GrantFiled: December 14, 2001Date of Patent: January 3, 2006Assignee: AstenJohnson, Inc.Inventor: Richard E. Pitt
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Patent number: 6979387Abstract: In laminated, resin-impregnated doctor blades for removing water from a grooved belt in the press part of a papermaking machine, fibers of the belt-contacting layer are oriented in the direction of travel of the belt. The doctor blade so constructed exhibits greater adhesion to the belt, an improved water-removal capability, and greater durability, when compared with a doctor blade having randomly oriented surface fibers.Type: GrantFiled: March 6, 2003Date of Patent: December 27, 2005Assignee: Ichikawa Co., Ltd.Inventors: Tetsuo Takeuchi, Hirofumi Ishii
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Patent number: 6977029Abstract: A doctor blade for removing water, which excels in water removal capability and shape retention capacity, and suppresses abrasion of the belt or other mating member with which it cooperates, is a fibrous laminate comprising integrated base material and batt fiber layers. By impregnating resin into one side of the fibrous laminate, a layer in which the amount of impregnated resin is large and a layer in which the amount of impregnated resin is small are provided. In use, the layer in which the amount of resin is small is in contact with a belt or other mating member. The doctor blades can be adapted to the mating member easily, and excel in the water removal capability and shape retention, and suppress abrasion of the mating member.Type: GrantFiled: September 17, 2002Date of Patent: December 20, 2005Assignee: Ichikawa Co., Ltd.Inventors: Tetsuo Takeuchi, Hirofumi Ishii, Mitsuyoshi Matsuno
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Patent number: 6942734Abstract: A treatment equipment, which is intended to be installed in connection with a moving surface. The treatment equipment includes a frame and a blade holder formed from composite material as a single piece and connected to the frame. In addition, a blade is fitted to the blade holder, the bevelled edge belonging to which is arranged to be brought into contact with the moving surface by moving the blade holder. In the blade holder, there is also a separate backing blade, which is fitted at one edge into the blade holder, the other edge extending closer than the blade holder to the said bevelled edge.Type: GrantFiled: July 8, 2004Date of Patent: September 13, 2005Assignee: Metso Paper, Inc.Inventors: Iikka Rata, Reijo Hassinen
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Patent number: 6872257Abstract: The invention pertains to a pressure chamber scraper for application of a liquid medium onto a rotating drum, said pressure chamber scraper having an axially extending scraper head, that together with an axially extending dosing scraper touching the mantle surface of the drum and with a sealing scraper forms a chamber in the circumferential direction, in said chamber there is an axially extending displacement element to form a pressure compartment and an outlet compartment and leaving an application gap to the mantle surface of the drum, and the liquid medium for wetting of the mantle surface flows through said gap, wherein the medium is supplied through an inlet opening into the pressure compartment. According to the invention, it is proposed that the displacement element and scraper head have mutually facing contact surfaces which bound at least one gap between them which opens into the pressure compartment and connects it to the inlet opening, so that the medium can move into the pressure compartment.Type: GrantFiled: August 30, 2002Date of Patent: March 29, 2005Assignee: Maschinenfabrik Max Kroenert GmbH & Co.Inventors: Bernd Martens, Sadan Deral, Wolfram Szczepaniak, Nils Hansen
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Patent number: 6852196Abstract: A method for applying a foam to a paper web is provided. Specifically, a foam is first formed from a liquid-based composition and a gas, such as air. Once formed, the foam is applied by a foam applicator to the web. In one embodiment, for example, the foam applicator applies the foam without substantially contacting the web. When applied with the foam, the web typically has a solids consistency less than about 95% by weight of the web. In some embodiments, one or more vacuum slots can be utilized in conjunction with the foam applicator to facilitate uniform application of the foam to the paper web.Type: GrantFiled: November 8, 2001Date of Patent: February 8, 2005Assignee: Kimberly-Clark Worldwide, Inc.Inventor: Joseph G. Capizzi
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Patent number: 6837932Abstract: The present invention includes a device and a method of applying a coating to a web. The preferred device comprises a feed nozzle coupled to a stiffener coupled to a spring coupled to a position/force adjuster. The feed nozzle comprises a fluid reservoir, a feed pipe, a metering surface, end seals and a back seal. The stiffener spring, as the frame deflects and polymer covered rolls deform, permits the rotation of the feed nozzle so a proper geometry is maintained, permitting increased control and a wider film thickness control range for a specific nozzle shape. This device permits greater film thickness control, ability to process at much higher speeds than currently achievable, and a wider range of film thickness. This device permits coatings to be applied at much wider ranges of rheological characteristics. Coatings can be applied at higher percent solids with improved characteristics. Multiple feed nozzles provide rapid product changeover for greater equipment utilization and higher productivity.Type: GrantFiled: December 2, 2003Date of Patent: January 4, 2005Inventor: Eugene A. Pankake
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Patent number: 6833157Abstract: The coating apparatus and method enable the coating liquid having been scraped-off to be reused without doing any one of the fluid adjusting treatment and the filtering treatment, while maintaining the features of the scraping-off type of extrusion coater, which is suitable for obtaining a uniform and extremely thin coating film. The coating head is provided with two slits: a coating slit and a recovering slit, and the excessive coating liquid having been discharged through the coating slit and applied to the web is scraped-off and recovered through the recovering slit.Type: GrantFiled: September 25, 2002Date of Patent: December 21, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshihiro Mandai, Mikio Tomaru, Norio Shibata
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Patent number: 6818062Abstract: It is possible to give ultrathin and uniform coating on a flexible web in scraping-off type coating. The distribution of pressure in a web width direction is adjusted by a pressure distribution adjusting device when an excess of coating liquid excessively applied is scraped off by a doctor blade by giving relative pressure to a coating surface of a web and the doctor blade after applying the coating liquid that is more excessive than the desired quantity of the coating liquid on the web by a precoating apparatus while making the web continuously travel.Type: GrantFiled: October 29, 2002Date of Patent: November 16, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Mikio Tomaru, Toshihiro Mandai, Norio Shibata
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Patent number: 6803076Abstract: The invention is a contact die for dispensing of flowable material on a substrate. The contact die includes at least one die block including a first internal passage. A die lip portion is disposed on the die block having a lateral dimension. A first plurality of orifices is disposed through the die lip portion proximate to each other and in communication with the internal passage to dispense flowable material as a single strip on the substrate. A first edge is disposed on one lateral side of the first plurality of orifices to direct the flowable material.Type: GrantFiled: October 23, 2002Date of Patent: October 12, 2004Assignee: 3M Innovative Properties CompanyInventors: Pentti K. Loukusa, Kurt W. Oster, Todd L. Peterson, Robert B. Secor, Rebecca A. Shipman, Merlin J. Steffen
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Patent number: 6780354Abstract: A method employing a casting head having a variably displaceable cavity surface. The casting head comprises a cavity, at least partially formed by plurality of surfaces, including a carrier surface adjacent the cavity, and a variably displaceable drive surface for controlling a pressure of a viscous casting material in a region proximate the carrier surface. In one embodiment of the invention, the casting head further comprises a doctor blade, disposed proximate the carrier surface, forming a gap therebetween for egress of the casting material. In another embodiment of the casting head, the variably displaceable drive surface is comprised of a piston. The piston is actuated by a driver-controlled motor according to a pre-determined displacement program, or according to the level of the casting material in the cavity.Type: GrantFiled: May 29, 2003Date of Patent: August 24, 2004Assignee: The DirectTV Group, Inc.Inventors: Klaus Robinson, Matthew T. Sinnott, Elena Sherman
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Patent number: 6772937Abstract: By using an application unit having: a storage chamber for a viscous material; a discharge hole, for the viscous material, provided so as to communicate with the storage chamber, where a viscous-material feeding device for feeding the viscous material to the storage chamber is coupled to the application unit; and a discharge-pressure adjusting device for imparting a discharge pressure to the viscous material stored in the storage chamber, a screen mask having openings corresponding to the application object or the application object itself and the discharge hole of the application unit are brought into contact with each other, either the application unit and the screen mask or the application unit and the application object are moved relative to each other while the discharge pressure is imparted to the viscous material in the storage chamber, and the viscous material is applied onto the application object while the storage chamber is replenished at all times with the viscous material by the viscous-materialType: GrantFiled: April 24, 2001Date of Patent: August 10, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toshinori Mimura, Hiroaki Onishi, Hiroshi Yamauchi, Toshiaki Yamauchi, Jun Shirai, Yoshiyuki Nagai, Muneyoshi Fujiwara
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Patent number: 6758904Abstract: A backing lath (6, 14) used for coating a web of paper or paperboard in doctor blade and rod coaters and film-transfer coaters, the backing lath featuring a fiber-reinforced composite material body. When necessary, the backing lath can be surfaced with a wear-resistant coating. The invention also concerns a doctor element assembly, wherein the backing lath has a fiber-reinforced composite material body.Type: GrantFiled: March 28, 2003Date of Patent: July 6, 2004Assignee: Metso Paper, Inc.Inventors: Petri Parni, Rami Vanninen
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Publication number: 20040123965Abstract: The invention relates to a method for monitoring the operation of a doctor assembly in a paper machine. In the method, the operation of the doctor assembly (16) is monitored. In case of a malfunction, the paper machine's (10) control devices (14-14′, 15) are used to carry out the necessary measures for eliminating the malfunction and carrying out repair and/or protective measures. In addition, detector devices (20) are arranged in connection with the doctor assembly (16), to detect a malfunction. The detector devices (20) are connected to the control devices (14-14′, 15) of the paper machine (10), in order to carry out the said measures automatically. The invention also relates to doctor assemblies in a paper machine for implementing the method.Type: ApplicationFiled: February 19, 2004Publication date: July 1, 2004Inventors: Juha Isometsa, Tuomo Juvakka, Seppo Parviainen, Ilkka Rata, Mika Saari, Juhani Vestola
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Patent number: 6752871Abstract: A coating system for coating print carriers includes at least one pump, at least one selection valve, a first metering device and a second metering device. The first metering device and the second metering device are constructed differently from one another with respect to metering principles thereof. The pump and the selection valve are assembled into a modular supply unit constructed so as to be compatible both with the first and with the second metering device. A coating machine, such as a printing or varnishing machine which includes the coating system, is also provided.Type: GrantFiled: January 31, 2003Date of Patent: June 22, 2004Assignee: Heidelberger Druckmaschinen AGInventors: Wolfgang Bitterich, Bernd Heller
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Publication number: 20040112283Abstract: The present invention includes a device and a method of applying a coating to a web. The preferred device comprises a feed nozzle coupled to a stiffener coupled to a spring coupled to a position/force adjuster. The feed nozzle comprises a fluid reservoir, a feed pipe, a metering surface, end seals and a back seal. The stiffener spring, as the frame deflects and polymer covered rolls deform, permits the rotation of the feed nozzle so a proper geometry is maintained, permitting increased control and a wider film thickness control range for a specific nozzle shape. This device permits greater film thickness control, ability to process at much higher speeds than currently achievable, and a wider range of film thickness. This device permits coatings to be applied at much wider ranges of rheological characteristics. Coatings can be applied at higher percent solids with improved characteristics. Multiple feed nozzles provide rapid product changeover for greater equipment utilization and higher productivity.Type: ApplicationFiled: December 2, 2003Publication date: June 17, 2004Inventor: Eugene A. Pankake
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Patent number: 6730171Abstract: The present invention is a foam applicator system for applying foam to a tissue web. The foam applicator system comprises a foam applicator capable of applying a liquid-based composition to a tissue web. The foam applicator includes an extrusion head comprising a first nozzle bar and a second nozzle bar and having an inner surface and an outer surface. A first end of a flexible scraper is operatively associated with the first nozzle bar of the extrusion head. A second end of the flexible scraper outward from the first end of the flexible scraper. The foam applicator system may also comprise a vacuum slot positioned opposing the extrusion head with the tissue web therebetween.Type: GrantFiled: November 5, 2001Date of Patent: May 4, 2004Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Joseph George Capizzi, Strong C. Chuang
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Patent number: 6725769Abstract: An application device for applying viscous or paste fluid material to a surface therebeneath and having a fluid outlet aperture in its lower region and including a sealing gasket or foil for sealing the outlet aperture against the surface. The gasket or foil is formed from a sheet of flexible material with an uninterrupted or continuous, non-apertured outer part extending around the periphery of the outlet aperture and surrounding an inner aperture or apertured inner region of the gasket or foil.Type: GrantFiled: March 7, 2001Date of Patent: April 27, 2004Assignee: Dek International GmbHInventor: David Godfrey Williams
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Patent number: 6719845Abstract: The present invention relates to an improved doctor blade and bedplate apparatus wherein there is a recess in the bedplate from some position upstream of the doctor blade to some position downstream of the doctor blade. This recess or gap in the area of the bedplate under the doctor blade allows one to form an even or uniform coating on the back of a web of material. This is particularly helpful in forming uniform coatings on the back of a greige good which has face fibers of varying lengths. The present invention also relates to an improved process for preparing a relatively uniform coating on the back of a web of material.Type: GrantFiled: January 21, 2003Date of Patent: April 13, 2004Assignee: Bayer Polymers LLCInventor: Jeffrey L. Robbins
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Patent number: 6712905Abstract: A doctor blade device for machines for the coating of fibrous webs, in particular of paper or cardboard, and for keeping rotating rollers clean has a leaf-shaped doctor blade element (1) which is held by a holding means (2) and which, for a change, can be drawn out laterally on the holding means (2). The doctor blade element (1) is provided at least on one side with a grip part (8).Type: GrantFiled: May 14, 2002Date of Patent: March 30, 2004Inventors: Janne Nurmi, Timo Sironen
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Publication number: 20040050323Abstract: An apparatus for controlling coating weight on a steel strip in a continuous hot dip galvanizing process, in which the coating weight is controlled through air wiping after the steel strip passes through a molten zinc coating bath. More particularly, the apparatus keeps the steel strip equidistant from each air knife, uniformly distributes a spray pressure of the air knives in a widthwise direction of the steel strip, and minimizes variation in coating weights on both surfaces of the steel strip. Furthermore, when two steel strips that are different in thickness are continuously hot dip galvanized, the apparatus predicts the movement of the passing line of the steel strips and accurately controls the positions of the air knives. As a result, product deficiencies such as insufficient coating can be reduced and zinc loss due to excess coating can be minimized.Type: ApplicationFiled: May 30, 2003Publication date: March 18, 2004Inventor: Hong-Kook Chae
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Patent number: 6656529Abstract: The present invention includes a device and a method of applying a coating to a web. The preferred device comprises a feed nozzle coupled to a stiffener coupled to a spring coupled to a position/force adjuster. The feed nozzle comprises a fluid reservoir, a feed pipe, a metering surface, end seals and a back seal. The stiffener spring, as the frame deflects and polymer covered rolls deform, permits the rotation of the feed nozzle so a proper geometry is maintained, permitting increased control and a wider film thickness control range for a specific nozzle shape. This device permits greater film thickness control, ability to process at much higher speeds than currently achievable, and a wider range of film thickness. This device permits coatings to be applied at much wider ranges of rheological characteristics. Coatings can be applied at higher percent solids with improved characteristics. Multiple feed nozzles provide rapid product changeover for greater equipment utilization and higher productivity.Type: GrantFiled: October 2, 2000Date of Patent: December 2, 2003Inventor: Eugene A. Pankake
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Patent number: 6630026Abstract: An apparatus for applying a treating mix onto the surface of a moving device in the coating of paper or board. The apparatus comprises a blade carrier (3), doctor means (4) attached to the blade carrier (3), a front wall (9) positioned a distance from the doctor means (4), a device (1) constituting the moving device, said device being arranged in conjunction with the front wall (9) and the doctor means such that it forms a chamber (6, 7) with the front wall (9) and the doctor means, and means (8) for supplying treating agent into an area of the application chamber (6, 7) which is at least essentially opposite to the moving surface. To prevent streaks, a screen plate (10) is fitted in the application chamber, at least partly dividing the application chamber (6, 7) such that with regard to the screen plate (10), the doctor means (4) is arranged on the opposite side thereof to the feed means for the treating agent.Type: GrantFiled: November 19, 2001Date of Patent: October 7, 2003Assignee: Metso Paper, Inc.Inventors: Timo Kiiha, Petri Parni, Petri Joutjärvi
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Patent number: 6630229Abstract: A recording medium particularly suitable for electrophotographic copying is characterized by coated paper that for a given basis weight has proportionally less coating and proportionally more fiber than conventional coated paper made for electrophotographic processes. The base sheet of the coated paper is preferably formed square on a paper machine wet end and has on the order of 40-50% less filler than conventional sheet paper made for electrophotographic processes. After being formed and dried, the base sheet is provided with a top coat weight that is approximately 60% less than the typical coat weight used for conventional paper. The coating is formulated to have sufficient viscosity to stay more on the surface of the base sheet. The coated sheet is calendered to a medium gloss on the order of a 75° TAPPI gloss of about 45, both to preserve a degree of surface roughness to enhance runnability of the paper through an electrophotographic copier and to provide a pleasant and easily readable surface.Type: GrantFiled: June 9, 2000Date of Patent: October 7, 2003Assignee: Stora Enso North America Corp.Inventors: Charles A. Normington, Gregory E. Pulchinski, Gary G. Schiller, Brian L. Scheller
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Patent number: 6605320Abstract: A coating device for carrying out a die coating method, which is capable of rapidly and assuredly eliminating an undesirable streak occurring in a coating layer during the coating operation. The coating device includes a coating head spaced from a back-up roll, and a shifting mechanism for shifting the coating head close to and remote from the back-up roll. The shifting mechanism includes a reciprocation carriage mounted onto a stationary frame to be linearly reciprocatedly movable thereon, a drive section for reciprocating the reciprocation carriage on the stationary frame, and a stop section for selectively hindering the linear motion of the reciprocation carriage caused by the drive section at a desired position. The shifting mechanism operates to instantaneously reciprocate the coating head at a small distance so that a distance between the outer surface of the back-up roll now carrying out the coating operation and the coating face of the coating head temporarily increases.Type: GrantFiled: August 8, 2001Date of Patent: August 12, 2003Assignee: 3M Innovative Properties CompanyInventor: Yuko Yoshida
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Publication number: 20030131959Abstract: A creping blade for creping a cellulosic web from a rotatable cylinder in a creping process includes first and second side faces. The first side face is at least substantially opposite to the second side file. The blade also includes an upper surface adjacent to the first and second side faces. A plurality of notches is provided along the upper surface. Each of the notches has a bottom portion and an open end defined by at least a portion of the upper surface. The notches are configured to increase the caliper of the cellulosic web when the creping blade crepes the cellulosic web from an outer surface of the rotatable cylinder. Creped paper and improved methods of manufacturing paper are also provided.Type: ApplicationFiled: October 30, 2002Publication date: July 17, 2003Applicant: Fort James CorporationInventors: Robert J. Marinack, Anthony O. Awofeso, Frank D. Harper, Thomas N. Kershaw
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Patent number: 6592669Abstract: An fountain applicator for applying coating liquid onto a web of paper carried past the applicator, has a coating liquid flow path that includes a curved surface along which a sheet of the coating liquid is flowed to subject the sheet to centrifugal force to cause air entrained in the coating liquid to move away from one side of the sheet that is toward the curved surface, so that the one side is relatively free of entrained air. After being flowed along the curved surface, the sheet of coating liquid is directed toward the web in a free standing jet curtain of coating liquid, to contact the web surface primarily with the one relatively air-free side of the coating liquid sheet to decrease the occurrence of skip coating on the web surface, especially when the web is traveling past the applicator at high speeds. The coating is applied in excess onto the web surface and is metered and leveled to a desired coat weight by a downstream doctor.Type: GrantFiled: September 17, 2001Date of Patent: July 15, 2003Assignee: Stora Enso North America Corp.Inventor: Wayne A. Damrau
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Patent number: 6589038Abstract: A casting head having a variably displaceable cavity surface. The casting head comprises a cavity, at least partially formed by plurality of surfaces, including a carrier surface adjacent the cavity, and a variably displaceable drive surface for controlling a pressure of a viscous casting material in a region proximate the carrier surface. In one embodiment of the invention, the casting head further comprises a doctor blade, disposed proximate the carrier surface, forming a gap therebetween for egress of the casting material. In another embodiment of the casting head, the variably displaceable drive surface is comprised of a piston. The piston is actuated by a driver-controlled motor according to a pre-determined displacement program, or according to the level of the casting material in the cavity.Type: GrantFiled: January 31, 2000Date of Patent: July 8, 2003Assignee: Hughes Electronics CorporationInventors: Klaus Robinson, Matthew T. Sinnott, Elena Sherman
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Patent number: 6579366Abstract: A coating machine for directly or indirectly applying a coating to a material web is designed to apply liquid or viscid coating medium onto a moving surface. The coating machine includes a discharge nozzle for discharging a coating medium onto the moving surface. The discharge nozzle has a first nozzle lip residing on the feed-side, and a second nozzle lip residing on the trailing side with respect to the moving surface. At least one of the first and second nozzle lips is composed of a blade element.Type: GrantFiled: January 12, 2001Date of Patent: June 17, 2003Assignee: Voith Paper Patent GmbHInventors: Richard Bernert, Manfred Ueberschär, Eckhard Wozny, Dennis Fartheymüller
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Patent number: 6579368Abstract: An application apparatus is for applying a liquid or pasty medium to a moving base. The moving base is a surface of a material web in a case of direct application and a surface of a transfer element for transferring the medium to the material web in a case of indirect application, the material web being one of paper and cardboard. The application apparatus has an inlet side and an outlet side with respect to a direction of movement of the moving base. The application apparatus includes a carrying beam; an essentially rigid supporting unit provided on the carrying beam; a sealing doctor device positioned at the inlet side of the application apparatus, the sealing doctor device being fixedly attached to the supporting unit; and a metering doctor device positioned at the outlet side of the application apparatus, the metering doctor device being fixedly attached to the supporting unit. The sealing doctor device and the metering doctor device define an application chamber therebetween.Type: GrantFiled: July 21, 2000Date of Patent: June 17, 2003Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Bernhard Kohl, Stefan Reich, Benjamin Méndez-Gallon, Martin Kustermann, Manfred Ueberschär, Christioph Henninger, Rüdiger Kurtz, Martin Tietz
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Patent number: 6576059Abstract: A chambered doctor blade apparatus provides an automatic system for cleanup and replacement of coating substance, as well as operating a hydraulic head loading system that includes hydrostatic compensation, and integrates the head loading mechanism into the automated cleaning, flushing and replacement cycle. A programmable logic controller (PLC) is connected to a touch screen display that presents an interactive graphical user interface for control purposes. The PLC is programmed to carry out sequentially the required steps for cleaning, refilling, and running the chambered doctor blade assembly, and to alternate water-based and non-water-based coatings without necessitating removal of the doctor blade head from the transfer roller. Each coating run begins with a purge step in which a new coating material is pumped through the system to waste to remove any residual material from the previous coating run.Type: GrantFiled: August 27, 2001Date of Patent: June 10, 2003Assignee: Harris & Bruno Company, Inc.Inventor: Robert L. Burgard
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Patent number: 6565712Abstract: A composite composition to be used in a doctor blade construction, said composite laminate construction comprising: (a) one or more central layers comprising an engineering thermoplastic resin filled with heat-resistant, non-glass, long strand fibers; (b) one or more intermediate layers positioned over the one or more central layers, each said intermediate layer comprising a carbon layer; and (c) one or more surface sheets positioned over the one or more intermediate layers.Type: GrantFiled: May 17, 2001Date of Patent: May 20, 2003Assignee: Lingol CorporationInventor: Peter Lindenfelser
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Publication number: 20030084843Abstract: The present invention is a foam applicator system for applying foam to a tissue web. The foam applicator system comprises a foam applicator capable of applying a liquid-based composition to a tissue web. The foam applicator includes an extrusion head comprising a first nozzle bar and a second nozzle bar and having an inner surface and an outer surface. A first end of a flexible scraper is operatively associated with the first nozzle bar of the extrusion head. A second end of the flexible scraper outward from the first end of the flexible scraper. The foam applicator system may also comprise a vacuum slot positioned opposing the extrusion head with the tissue web therebetween.Type: ApplicationFiled: November 5, 2001Publication date: May 8, 2003Inventors: Joseph George Capizzi, Strong C. Chuang
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Patent number: 6554900Abstract: An apparatus for the application of a flowable medium (2, 2′) from a stock chamber (7, 8) to a surface (6) being moved along the apparatus, and to the use of an apparatus of this type. The stock chamber (7, 8) partly covers the surface (6), with formation of a sealing gap (14) and an exit gap (18). In order to prevent the formation of air bubbles in the medium (2, 2′), it is proposed to divide the stock chamber (7, 8) into a pre-chamber (7) and a main chamber (8). A dividing element (10) which, together with the surface (6), limits a dividing gap (15), is arranged between the chambers. Various shapes of the dividing element are proposed. The apparatus is particularly suitable for the application of a polymer dispersion to the surface (6). A process for operating an apparatus of this type is also described.Type: GrantFiled: April 2, 2001Date of Patent: April 29, 2003Assignee: Pagendarm Technologie GmbHInventors: Oral Aydin, Andree Dragon, Frank Reinhard
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Patent number: 6540833Abstract: The invention pertains to a coating apparatus and method in which most of the relative movement between a dispensing head and the substrate to be coated is provided by the coating head. The moving head configuration reduces the system footprint and diminishes leveling problems. A powered shuttle mechanism carries a dispensing head above a substrate to be coated while riding on a bearing located underneath the chuck holding the substrate thereby providing rigidity and reducing the system footprint. Chuck support is designed to accommodate anticipated vertical sag in the dispensing head by supporting the chuck at points along its periphery thereby permitting the chuck to sag in conjunction with the dispensing head. The shuttle mechanism is equipped with means for automatically adjusting the height of the dispensing head with respect to substrate to compensate for substrate placement error, substrate dimensional variation, and mechanical drift in the mechanical machine parts.Type: GrantFiled: January 8, 1999Date of Patent: April 1, 2003Assignee: FAStar, Ltd.Inventors: Gregory M. Gibson, Carl W. Newquist, John E. Hawes, Rene Soliz, Samer Mahmoud Kabbani, Scott A. Snodgrass, Altaf A. Poonawala, Darwin R. Frerking, Zi-Qin Wang, Ocie T. Snodgrass, Eric E. Anderson
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Publication number: 20030051846Abstract: In a doctor blade, which suppresses abrasion of a mating member and excels in water removal capability and shape retention capacity over a long time, resin is impregnated into a fibrous laminate composed of base materials and batt layers integrated by needle punching, and an adjustment is made so that the void content is between 50% and 80%.Type: ApplicationFiled: September 17, 2002Publication date: March 20, 2003Inventors: Tetsuo Takeuchi, Hirofumi Ishii
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Publication number: 20030051847Abstract: A doctor blade for removing water, which excels in water removal capability and shape retention capacity, and suppresses abrasion of the belt or other mating member with which it cooperates, is a fibrous laminate comprising integrated base material and batt fiber layers. By impregnating resin into one side of the fibrous laminate, a layer in which the amount of impregnated resin is large and a layer in which the amount of impregnated resin is small are provided. In use, the layer in which the amount of resin is small is in contact with a belt or other mating member. The doctor blades can be adapted to the mating member easily, and excel in the water removal capability and shape retention, and suppress abrasion of the mating member.Type: ApplicationFiled: September 17, 2002Publication date: March 20, 2003Inventors: Tetsuo Takeuchi, Hirofumi Ishii, Mitsuyoshi Matsuno
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Patent number: 6533863Abstract: The present invention relates to an improved doctor blade and bedplate apparatus wherein there is a recess in the bedplate from some position upstream of the doctor blade to some position downstream of the doctor blade. This recess or gap in the area of the bedplate under the doctor blade allows one to form an even or uniform coating on the back of a web of material. This is particularly helpful in forming uniform coatings on the back of a greige good which has face fibers of varying lengths. The present invention also relates to an improved process for preparing a relatively uniform coating on the back of a web of material.Type: GrantFiled: May 17, 2001Date of Patent: March 18, 2003Assignee: Bayer CorporationInventor: Jeffrey L. Robbins
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Patent number: 6524444Abstract: In a paper machine having a roll rotating about an axis extending in a cross machine direction, and having a doctor blade applied to the roll surface by a blade holder parallel to the axis and carried on a doctor back, an apparatus is provided for accommodating relative movement between the blade holder and the doctor back in the cross machine direction during mounting and removal of the blade holder. The apparatus comprises a rail fixed to the doctor back and extending longitudinally in the cross machine direction. A groove extends along the length of the guide rail. The groove has a bottom, a width measured between confronting sides, and a top defined by ledges projecting inwardly from the sides, with inner edges spaced one from the other to define a slot that underlies the blade holder and has a width narrower than the width of the groove. A plurality of shafts are spaced along the length of the blade holder and project downwardly through the slot and into the groove.Type: GrantFiled: April 24, 2001Date of Patent: February 25, 2003Assignee: Kadant Web Systems Inc.Inventors: Allen J. Brauns, Robert A. Reid, Ronald F. Goodnow
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Publication number: 20030029377Abstract: A doctor blade device for machines for the coating of fibrous webs, in particular of paper or cardboard, and for keeping rotating rollers clean has a leaf-shaped doctor blade element (1) which is held by a holding means (2) and which, for a change, can be drawn out laterally on the holding means (2). The doctor blade element (1) is provided at least on one side with a grip part (8).Type: ApplicationFiled: May 14, 2002Publication date: February 13, 2003Inventors: Janne Nurmi, Timo Sironen
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Publication number: 20020189777Abstract: An arrangement for doctoring a belt or a soft roll surfacing in a paper or board machine includes a doctor set in connection with a surface with a doctor blade fitted in it for doctoring the surface. The doctor blade is at least partly of a material, the hardness of which is essentially equal to or less than the hardness of the material of the surface, in order to prevent the doctor blade from cutting into the surface. The material is arranged to form a layer extending over the entire width of the doctor blade, and the thickness of which throughout is at least half of the thickness of the doctor blade. A support construction is arranged in the doctor blade, which together with the layer is arranged to form the doctor blade.Type: ApplicationFiled: June 12, 2002Publication date: December 19, 2002Applicant: Metso Paper, Inc.Inventors: Ilkka Rata, Juhani Vestola