Contact Member Patents (Class 101/120)
  • Patent number: 10327620
    Abstract: A squeegee including an elongated squeegee blade having a substantially rigid upper portion and a lower flexible wiper portion. The squeegee further includes a generally T-shaped extension centered above and axially parallel with the squeegee blade. The T-shaped extension has a substantially rigid flange, operably connectable to the squeegee handle; and a flexible leg extending downward from the rigid flange and connected there-below to the rigid upper portion of the squeegee blade.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: June 25, 2019
    Inventor: Dan Tyroler
  • Patent number: 9579880
    Abstract: In a screen printing apparatus including: an impression cylinder that receives a sheet from a transfer cylinder located upstream in the sheet transport direction through a sheet gripping device and transports the sheet held in the sheet gripping device; and a rotary screen cylinder that is in contact with the impression cylinder and performs screen printing for the sheet held by the impression cylinder, the transfer cylinder is located above the impression cylinder, and the rotary screen cylinder is located to the side of the impression cylinder so that ink, varnish, or the like accumulates in a squeegee portion including a squeegee shaft, a squeegee, and the like in the rotary screen cylinder.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: February 28, 2017
    Assignee: Komori Corporation
    Inventor: Akehiro Kusaka
  • Patent number: 9561680
    Abstract: A method for screen printing using a screen, preferably a metal screen made by electroforming, having a pattern of openings separated by bridges and crossing points, and having a flat surface on the squeegee side, wherein on the printing side of the screen the screen has a 3-D structure comprising peaks (P) and valleys (V) formed by a difference in thickness between the bridges and crossing points. The use of the method in the production of RFID tags, solar panels, electronic printing boards. A 3-D printing screen, with an attached stencil with or without the negative of an image to be printed. A printing machine comprising: one or more 3-D printing screens, in combination with one or more reservoirs for ink and/or in combination with a roller or squeegee.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: February 7, 2017
    Assignee: SPGPrints B.V.
    Inventors: Peter Benjamin Spoor, Marinus Cornelis Petrus Dekkers, Martin Jan Smallegange
  • Patent number: 9469126
    Abstract: A method of surface pre-treatment of a variety of ink-receiving substrates of different types includes applying treatment energy to the surface of the substrates in a controlled atmosphere that contains nitrogen and oxygen. The amount of energy per surface area is adjusted dependent upon the type of substrate. The ratio of oxygen to nitrogen in the controlled atmosphere is adjusted dependent upon the type of substrate.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: October 18, 2016
    Assignee: OCE-TECHNOLOGIES B.V.
    Inventor: Guido G. Willems
  • Patent number: 9327491
    Abstract: A rotary screen printing press includes: a sub-frame supporting a screen plate with brackets interposed therebetween, the screen plate being formed in a cylindrical shape; a screen-plate engagement-disengagement cylinder configured to move the sub-frame between a print position and a retreat position; and supporting plates supporting a squeegee in such a way that the squeegee is engageable with and disengageable from the inner periphery of the cylindrical screen plate. The supporting plates are supported on the sub-frame.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: May 3, 2016
    Assignee: KOMORI CORPORATION
    Inventor: Akehiro Kusaka
  • Patent number: 8875627
    Abstract: The invention describes a machine (10) for the in-line transformation of single-use products, comprising at least one unwinding group (12) for one or more reels (14) of web-shaped material (100), which constitutes the base support for said product, at least one printing group (18), arranged downstream of said unwinding group (12), capable of heat-printing decorative patterns, trademarks and/or inscriptions with a paraffin or natural wax-based ink (W) and/or mixtures thereof on the web-shaped material (100), and at least one folding and cutting group (20), arranged downstream of the printing group (18), wherein the printed web-shaped material (100) is folded and cut to form said products.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: November 4, 2014
    Assignee: O-Pac S.R.L. Societa a Socio Unico
    Inventor: Angelo Bartesaghi
  • Patent number: 8714083
    Abstract: In a rotary stencil printing press including a rotary screen cylinder which supports a screen printing form and is supported rotatably, and a squeegee which is located within the rotary screen cylinder and, when printing is done, contacts an inner peripheral surface of the screen printing form to transfer ink stored within the rotary screen cylinder to a web via holes of the screen printing form and, when printing is stopped, leaves the inner peripheral surface of the screen printing form, throw-on and throw-off of the squeegee with respect to the inner peripheral surface of the screen printing form, and adjustment of the position of the throw-on are performed by motors.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: May 6, 2014
    Assignee: Komori Corporation
    Inventors: Hiromitsu Numauchi, Isao Komuro, Akehiro Kusaka
  • Publication number: 20140020577
    Abstract: A rotary screen apparatus includes: a hollow cylinder having multiple holes formed therein and configured to come into contact, at its outer peripheral surface, with the surface of a sheet held on an impression cylinder; a rotary screen including a squeegee configured to extrude ink delivered to the inner peripheral surface of the hollow cylinder through the holes by coming into contact with the inner peripheral surface of the hollow cylinder; and a restricting plate, disposed on the downstream side of the squeegee in the moving direction thereof in relative movement of the hollow cylinder and the squeegee performed when the ink is extruded through the holes in the hollow cylinder, for restricting movement of the ink such that the ink is kept within a space present on a downstream side of the portion of the squeegee in contact with the hollow cylinder in the moving direction.
    Type: Application
    Filed: July 22, 2013
    Publication date: January 23, 2014
    Applicant: KOMORI CORPORATION
    Inventors: Tasuku KONDO, Isao KOMURO, Kosuke MAEDA
  • Patent number: 8252380
    Abstract: A method in connection with coating, comprising a running web (8) arranged to be coated with a coating mix (11), coating means (1) arranged in connection with said web (8), a coating surface (6, 7) at the coating means (1) and arranged in contact with said web (8) to dose said coating mix (11), and said coating means (1) being provided with at least a first coating surface (6) and a second coating surface (7), in such a way that it is possible at said running web (8) to switch between the one (6) and the other (7) surfaces while at least one of said surfaces (6, 7) is in an active contact position.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: August 28, 2012
    Assignee: Mattssonforetagen I Uddevalla Akttiebolag
    Inventor: Håkan Karlsson
  • Patent number: 8113115
    Abstract: A rotary screen printing press includes, a rotary screen cylinder which supports a screen printing form and is supported rotatably; an impression cylinder which is provided to oppose the rotary screen cylinder, and is supported rotatably; and a squeegee which is located within the rotary screen cylinder and, during printing, contacts an inner peripheral surface of the screen printing form, while being pressed against it, to transfer ink stored within the rotary screen cylinder to a material to be printed, which is held on the impression cylinder, via holes of the screen printing form. The printing press has a squeegee throw-on and throw-off control device which controls the pressing force of the squeegee acting on the inner peripheral surface of the screen printing form during printing in accordance with the type and thickness of the material to be printed.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: February 14, 2012
    Assignee: Komori Corporation
    Inventors: Isao Umetsu, Hiromitsu Numauchi, Isao Komuro, Akehiro Kusaka
  • Patent number: 7938063
    Abstract: An intaglio printing press includes, a rotary screen comprising a hollow cylinder, which has a small hole group for special ink supply formed in a circumferential surface of the hollow cylinder and which is supported rotatably, and a squeegee contacting an inner peripheral surface of the hollow cylinder, a rubber roller supported rotatably to oppose an outer peripheral surface of the hollow cylinder at a position where the squeegee contacts the inner peripheral surface of the hollow cylinder, and a sheet supplied with special ink, which has been stored within the hollow cylinder, by the squeegee via the small hole group of the hollow cylinder. The intaglio printing press further includes special ink guide means, such as guide grooves, for guiding a surplus of the special ink, which is not supplied to the sheet by the squeegee, to the small hole group of the hollow cylinder.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: May 10, 2011
    Assignee: Komori Corporation
    Inventors: Isao Komuro, Akehiro Kusaka
  • Patent number: 7832332
    Abstract: A printing device comprising a stencil printing device which is excellent in operativity, in which a print drum with UV ink and non-UV ink can be used in a single stencil printing device. The printing device has a stencil printing control device and UV irradiation control device in which a drum unit ink type identifying sensor, which detects whether the print drum attached to the stencil printing device main body is a print drum unit for UV ink or a drum unit for non-UV ink, is used to operate at least a UV lamp, of the UV lamp and a UV auxiliary lamp, and to irradiate UV light when attachment of the drum unit for UV ink is detected, or to stop the operation of the UV lamp and UV auxiliary lamp when attachment of the print drum unit for non-UV ink is detected.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: November 16, 2010
    Assignee: Tohoku Ricoh Co., Ltd
    Inventor: Mitsuo Sato
  • Patent number: 7677170
    Abstract: The present invention relates to a device for placing and removing a doctor blade in a printing screen cylinder mounted on a printing machine having a support mounted on the frame of the machine in the continuation of the cylinder, and a track mounted on the support and designed to allow a slider to move parallel only to the axis of the cylinder between a first limit position situated outside of the cylinder and a second limit position situated inside the cylinder facing the working position of the doctor blade.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: March 16, 2010
    Assignee: KBA-Giori S.A.
    Inventors: Günther Hoier, Matthias Gygi, Eric Wagner
  • Patent number: 7536950
    Abstract: To make the stencil printing at a stabilized density from the start of printing in a stencil printing where a plurality of kinds of inks different from each other in volatility and/or viscosity are used. Information representing the volatility and/or viscosity of ink is stored in a storage means of an ink container, while the stored information representing the volatility and/or viscosity of ink is read out, and at the same time, the ceasing time from interruption of printing to resumption of the same is measured, and the printing pressure is controlled according to the ceasing time and the information representing the volatility and/or viscosity of ink.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: May 26, 2009
    Assignee: Riso Kagaku Corporation
    Inventors: Kenji Oshima, Takashi Isozaki, Manabu Iwamoto
  • Patent number: 7530304
    Abstract: To make the stencil printing at a stabilized density from the start of printing in a stencil printing where a plurality of kinds of inks different from each other in volatility and/or viscosity are used. Information representing the volatility and/or viscosity of ink is stored in a storage means of an ink container, while the stored information representing the volatility and/or viscosity of ink is read out, and at the same time, the ceasing time from interruption of printing to resumption of the same is measured, and the printing pressure is controlled according to the ceasing time and the information representing the volatility and/or viscosity of ink.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: May 12, 2009
    Assignee: Riso Kagaku Corporation
    Inventors: Kenji Oshima, Takashi Isozaki, Manabu Iwamoto
  • Patent number: 7503255
    Abstract: Squeegee assembly for a screen printing machine with a printing table, wherein the squeegee assembly has at least one squeegee, one squeegee holder and at least one support displaceable across the printing table, wherein the squeegee is held on the support by means of the squeegee holder and can be pressed against the printing table by pressure cylinders, characterized in that the support has a U-shaped profile, and at least the cylinder sections of the pressure cylinders are accommodated within the U-shaped profile.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: March 17, 2009
    Assignee: Thieme GmbH & Co. KG
    Inventors: Dietmar Weber, Harry Goetz
  • Publication number: 20090041931
    Abstract: A screen printing unit equipped with a rotary screen apparatus comprises a cylindrical screen rotatably supported so as to be brought into contact with a rotatable impression cylinder. Multiple small holes are formed in the circumferential surface of the screen, and are filled up with a coating material. Some of the holes corresponding to a pattern not being filled with the coating material, and a special ink stored inside the screen can be supplied to a sheet held on the outer circumferential surface of the impression cylinder so as to form a shape corresponding to the pattern. The small holes are formed only in an area of the screen in the circumferential direction thereof extending from a position corresponding to the downstream-side end of the sheet in the sheet-conveying direction to a position corresponding to the upstream-side end of the sheet in the sheet-conveying direction.
    Type: Application
    Filed: July 18, 2008
    Publication date: February 12, 2009
    Applicant: KOMORI CORPORATION
    Inventors: Akehiro Kusaka, Susumu Takezawa
  • Publication number: 20090000497
    Abstract: A rotary screen printing press includes a rotary screen cylinder which supports a screen printing forme and is supported rotatably; an impression cylinder which is provided to oppose the rotary screen cylinder, has a groove portion provided in an outer peripheral surface thereof, the groove portion accommodating a gripper device for holding a material to be printed, and is supported rotatably; and a squeegee which is located within the rotary screen cylinder and, during printing, contacts an inner peripheral surface of the screen printing forme, while being pressed against it, to transfer ink stored within the rotary screen cylinder to the material to be printed, which is held on the impression cylinder, via holes of the screen printing forme.
    Type: Application
    Filed: June 5, 2008
    Publication date: January 1, 2009
    Applicant: KOMORI CORPORATION
    Inventors: Isao Umetsu, Hiromitsu Numauchi, Isao Komuro, Akehiro Kusaka
  • Publication number: 20080307987
    Abstract: A rotary screen printing press includes, a rotary screen cylinder which supports a screen printing forme and is supported rotatably; an impression cylinder which is provided to oppose the rotary screen cylinder, and is supported rotatably; and a squeegee which is located within the rotary screen cylinder and, during printing, contacts an inner peripheral surface of the screen printing forme, while being pressed against it, to transfer ink stored within the rotary screen cylinder to a material to be printed, which is held on the impression cylinder, via holes of the screen printing forme. The printing press has a setting instrument for setting the length in the transport direction of the material to be printed, and a squeegee throw-on and throw-off control device for controlling the squeegee to be moved to a retreat position in accordance with the length in the transport direction of the material to be printed which has been set by the setting instrument.
    Type: Application
    Filed: June 9, 2008
    Publication date: December 18, 2008
    Applicant: KOMORI CORPORATION
    Inventors: Isao Umetsu, Hiromitsu Numauchi, Isao Komuro, Akehiro Kusaka
  • Publication number: 20080307986
    Abstract: A rotary screen printing press includes, a rotary screen cylinder which supports a screen printing forme and is supported rotatably; an impression cylinder which is provided to oppose the rotary screen cylinder, and is supported rotatably; and a squeegee which is located within the rotary screen cylinder and, during printing, contacts an inner peripheral surface of the screen printing forme, while being pressed against it, to transfer ink stored within the rotary screen cylinder to a material to be printed, which is held on the impression cylinder, via holes of the screen printing forme. The printing press has a squeegee throw-on and throw-off control device which controls the pressing force of the squeegee acting on the inner peripheral surface of the screen printing forme during printing in accordance with the type and thickness of the material to be printed.
    Type: Application
    Filed: June 6, 2008
    Publication date: December 18, 2008
    Applicant: KOMORI CORPORATION
    Inventors: Isao Umetsu, Hiromitsu Numauchi, Isao Komuro, Akehiro Kusaka
  • Patent number: 7331285
    Abstract: A squeegee unit for a rotary screen-printing device comprises a squeegee (2) with a squeegee edge (3) which is designed, during operation of a rotary screen-printing device in which the squeegee unit is mounted, to be pressed onto the inner side of a cylindrical screen of the rotary screen-printing device, and a squeegee holder (1) in which the squeegee is mounted. The squeegee edge (3) can be moved away from the squeegee holder (1) and towards the squeegee holder. A resilient element (18) is arranged between the squeegee edge (3) and the squeegee holder (1), in such a manner that the squeegee edge is pressed away from the squeegee holder by spring force. The squeegee unit is provided with travel-limiting means which are designed in such a manner that the squeegee edge (3) can be moved over a relatively short distance of at most 1 mm and preferably of at most 0.5 from the working position in a direction away from the squeegee holder.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: February 19, 2008
    Assignee: Stork Prints B.V.
    Inventors: Arnoldus Theodorus Steenkamer, Dirk Steenbeek
  • Patent number: 7284479
    Abstract: A stencil printer operable in a duplex print mode of the present invention prints an image on one side of a sheet and then prints another image on the other side of the same sheet. The printer includes at least one print drum and at least one press roller facing the print drum for pressing the sheet against the print drum. When the press roller is used to press the other side of the sheet against the print drum, the press roller is implemented as an elastic body provided with a fluorine compound layer on the surface thereof.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: October 23, 2007
    Assignee: Tohoku Ricoh Co., Ltd.
    Inventor: Mitsuo Sato
  • Patent number: 7178459
    Abstract: An apparatus for distributing powders on a support in a predetermined pattern, includes: a belt conveyor (2) for transporting the support (3); a head for applying the powders (1), located above the conveyor (2), which head (1) includes a ring-wound closed continuous belt (4) exhibiting a plurality of perforations arranged according to a predetermined pattern, the perforations being of a size which enables passage of predetermined quantities of powders; a mechanism for controlling a supply and delivery of powders through the perforations and for keeping the continuous belt (4) clean. The head also includes a mechanism for controlling a movement of the continuous belt (4) in synchrony with a movement of the conveyor (2).
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: February 20, 2007
    Assignee: System S.p.A.
    Inventor: Franco Stefani
  • Patent number: 7069850
    Abstract: A stencil printing machine, which includes: a drum which is freely rotatable and has an outer peripheral wall formed of an ink impermeable member, in which a stencil sheet is mounted on a surface of the outer peripheral wall; an ink supplying device for supplying, to the surface of the outer peripheral wall, an ink guided from an ink tank; an ink recovery device for recovering, from an ink recovery portion, an extra ink on the surface of the outer peripheral wall; and a pressure roller which presses a print medium to the outer peripheral wall. The ink tank includes a main tank portion where unused ink is stored, and a sub-tank portion where the ink recovered by the ink recovery device is stored. The ink supplying device preferentially supplies the ink in the sub-tank portion.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: July 4, 2006
    Assignee: Riso Kagaku Corporation
    Inventors: Akira Nakamura, Taku Naitou, Takuya Shibahara
  • Patent number: 7045011
    Abstract: An integrated circuit screen printing nozzle that has a nozzle body, a first inner layer on the nozzle body, a second outer layer on the first layer, and an opening through the nozzle body, the first layer, and the second layer. The first and second layers can be an insert held within the body. The opening allows paste material to flow through the screen printing nozzle to the stencil mask. Also, the second outer layer includes a contact surface adapted to contact the stencil mask. One feature of the invention is that the first layer is softer (has a lower durometer) than the second layer. This allows the second layer to be more durable than the first layer and for the first layer to provide additional flexibility to the second layer. Therefore, the invention provides a nozzle that has the high durability characteristics of a hard outer surface with the compliance of a soft nozzle.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: May 16, 2006
    Assignee: International Business Machines Corporation
    Inventors: David C. Long, Jason S. Miller, Randall J. Werner
  • Patent number: 6877427
    Abstract: A quality control device includes a suction box, at least one gripper which can be displaced along a suction surface of the suction box, and a CCD camera. A belt, which can be displaced in a sheet transport direction, is disposed on the suction surface of the suction box.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: April 12, 2005
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventors: Brigitte Dünninger, Gerald Josef Reinhard, Reinhold Dünninger
  • Patent number: 6790280
    Abstract: A cradle for a spreading device, such as a rotatable rod, to which a spreading organ to be pressed against a movable surface has been attached. The cradle is fastened to a holder, and a gasket is provided between the cradle and the holder (9).
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: September 14, 2004
    Assignee: Metso Paper Inc.
    Inventor: Markku Lummila
  • Patent number: 6742450
    Abstract: A stencil printer of the present invention includes a master making section for perforating a master, which includes a porous support and a thermoplastic resin film, in accordance with image data to thereby make a master and wraps the master around a print drum to thereby effect printing. The stencil printer includes a cavity sensor for sensing the condition of cavities existing in the porous support of the stencil. A controller identifies the kind of the stencil by determining the condition of the cavities in accordance with information output from the cavity sensor, so that stable print quality is insured without regard to a difference in cavity ratio between the lots of stencils.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: June 1, 2004
    Assignee: Tohoku Ricoh Co., Ltd.
    Inventor: Tomiya Mori
  • Patent number: 6684766
    Abstract: A wiper blade for a screen printing head in which pasty product to be screen printed is biased toward a printing screen under pressure, the wiper blade comprising an elongate blade element having a thickness of between 0.1 and 0.5 mm, one edge of the blade element being configured to be fixed to a screen printing head and the other edge of the blade element being a forwardly-directed free edge which in use contacts a printing screen, and a strip fixed to the upper, non-screen contacting surface of the blade element along the free edge there of, wherein the strip and the free edge of the blade element together define a leading face which has a height of from 1 to 2.5 mm and encloses an acute angle with the printing screen.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: February 3, 2004
    Assignee: Dek International GmbH
    Inventors: Neil MacMillan Macraild, Simon Garry Clasper
  • Patent number: 6684770
    Abstract: An apparatus includes a rotary printing assembly operative for directly printing a layer of radiation curable material onto the cylindrical surface of individual articles. The rotary printing assembly includes a rotationally supported belt defining an interior region, the belt having a planar portion for contact with the cylindrical surface of the articles for directly printing a layer of the radiation curable material thereon. At least one squeegee is arranged within the interior region of the belt having a portion engaging the belt for contacting the planar portion of the belt with the cylindrical surface of the article. The squeegee is moveable longitudinally within the interior region of the belt during the printing operation. A radiation emitting device can be positioned adjacent the rotary printing assembly for at least partially curing the layer of radiation curable material applied to the articles.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: February 3, 2004
    Assignee: Deco Patents, Inc.
    Inventors: Melvin E. Kamen, Marvin Wells, Jerry Schuler
  • Patent number: 6681690
    Abstract: A printing unit of a sheet-fed printing press includes two cooperating screen-printing cylinders which are in direct contact. These two screen-printing cylinders define a printing gap through which the sheets to be printed pass during their printing step.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: January 27, 2004
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventor: Johannes Georg Schaede
  • Patent number: 6655270
    Abstract: A printing unit includes two screen-printing cylinders and two transfer cylinders that cooperate with the screen-printing cylinders and which define a printing gap or nip. At least one of the screen-printing cylinders has a screen surface and an interior doctor blade. A support element is provided for handling radially outwardly directed pressure exerted by the doctor blade on the screen surface in one section of the screen surface.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: December 2, 2003
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventor: Johannes Georg Schaede
  • Patent number: 6601502
    Abstract: An apparatus and method for decorating cylindrical articles using direct rotary screen printing of a UV radiation curable composition in various predetermined patterns and registrations. A rotary screen printing assembly is arranged in either a horizontal or vertical orientation to achieve production rates of about at least 250 articles per minute, and up to 1000 articles per minute. The UV radiation curable compositions are at least partially cured between a plurality of screen printing workstations using a UV radiation source.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: August 5, 2003
    Assignee: Deco Patents, Inc.
    Inventors: Melvin E. Kamen, Marvin Wells
  • Patent number: 6530318
    Abstract: An ink supply roll is disposed inside a printing drum of a stencil printer and supplies ink to the inner peripheral surface of the printing drum. At least the surface layer of the ink supply roll is formed of a nonmetal material which is not larger than 100° in contact angle and not larger than ±5% in swelling ratio to an ultraviolet-curing monomer.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: March 11, 2003
    Assignee: Riso Kagaku Corporation
    Inventors: Yasuo Yamamoto, Toshihiro Endo
  • Patent number: 6513426
    Abstract: Printing pressure to be applied to a press roller (18) is obtained by a pressure applying spring (33) and an adjustable spring (41), and the adjustable spring (41) is extended or contracted by a tensile-force varying mechanism, thereby rendering the printing pressure variable. Accordingly, in cases such as where the viscosity of ink has changed due to a temperature change, and the contact time of a printing sheet (P) with respect to a rotary cylindrical drum (14) or a stencil sheet (M) has changed due to a change in the printing speed, it is possible to stabilize printed image performance by adjusting the density of an image which is printed. In addition, a strong tensile force for stabilizing the printing pressure by the press roller (18) is dispersed between the pressure applying spring (33) and the adjustable spring (41), and the adjustable spring (41) is extended or contracted.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: February 4, 2003
    Assignee: Riso Kagaku Corporation
    Inventor: Masaki Orimoto
  • Patent number: 6508168
    Abstract: A stencil printer includes a printing drum which has an ink-permeable peripheral wall and is rotated about a predetermined axis of rotation with a stencil master wound around the peripheral wall, a back press roll which associates with the printing drum to nip and convey a printing paper, and an internal press roll which is provided in the printing drum to be movable back and forth toward and away from the back press roll and pushes the peripheral wall of the printing drum toward the back press roll. An internal press roll drive mechanism moves back and forth the internal press roll between a first position where the internal press roll is held away from the back press roll and a second position at a distance from the first position toward the back press roll and is able to freely change the distance between the axis of rotation of the printing drum and the second position.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: January 21, 2003
    Assignee: Riso Kagaku Corporation
    Inventors: Yasuhiro Takahashi, Hideaki Nogi, Yoshikazu Hara, Koichi Oyama
  • Patent number: 6484630
    Abstract: A stencil printing machine 1 is provided with a stencil drum 16 and a opposite 17 which are a pair of cylindrical parts located with their external peripheral surfaces being close to each other, a stencil sheet 15 being detachably wound on the external peripheral surface of the stencil drum 16, and serves to perform stencil printing process by rotating the stencil drum 16 and the opposite 17 in order that the external peripheral surfaces thereof are located close to each other and moved in the same direction while the stencil sheet 15 is pressed against the opposite 17, and by making the stencil sheet 15 in contact under pressure with a sheet of paper 22 passing between the stencil drum 16 and the opposite 17 by the pressing force of the stencil drum 16. The stencil drum 16 is detachably mounted on the stencil printing machine and provided with storage units 201 to 203 for storing information about the pressing force of the stencil drum 16 against the opposite 17.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: November 26, 2002
    Assignee: Riso Kagaku Corporation
    Inventors: Koji Nakayama, Hideharu Yoneoka
  • Patent number: 6477946
    Abstract: A stencil printing machine of the present invention has an inner press roller (47) arranged in the inside of a printing drum (16), an inner press mechanism (20) for shifting the inner press roller (47) between a pressure position (B) and a standby position and for adjusting a pressure power of the inner press roller (47) at the pressure position (B). At the pressure position (B), the inner press roller (47) presses the inner peripheral surface of a screen (19) forming a peripheral wall of the printing drum (16). At the standby position, the inner press roller (47) is separated from the inner peripheral surface. During printing, the inner press roller (47) is positioned at the pressure position (B) at which the inner press roller (47) presses the inner peripheral surface of the screen (19). The inner press mechanism (20) has an ink supply unit (38) arranged at the inside of the printing drum (16) in order to shift the inner press roller (47) between the pressure position (B) and the standby position.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: November 12, 2002
    Assignee: Riso Kagaku Corporation
    Inventor: Masaharu Ogata
  • Patent number: 6467407
    Abstract: A stencil printing machine includes a squeegee roller in a printing drum having a peripheral wall having an ink-nonpermeable nonperforated portion around an ink-permeable perforated portion to have a stencil sheet and a printing the print sheet therearound. A projected portion is provided on the nonperforated portion. The thickness of the nonperforated portion is formed thicker than that of the perforated portion, and accordingly, press force exerted to the peripheral wall and the stencil sheet by the squeegee roller and the outer roller is enhanced on the nonperforated portion. Therefore, spread of ink is stopped within the perforated portion and ink is prevented from leaking from a gap between the outer peripheral face of the nonperforated portion of the peripheral wall and the stencil sheet.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: October 22, 2002
    Assignee: Riso Kagaku Corporation
    Inventors: Hideaki Nogi, Katsuro Motoe
  • Patent number: 6458211
    Abstract: The invention relates to a device and to a method for applying a medium in the form of liquid, powder or paste to a substrate, having a container for the medium and a transport device which takes the medium from the container and discretely distributes it. In a propelling device the medium is selectively transferred from the transport device to the substrate with a propellant which is separate from the medium, or in the propelling device the medium is selectively removed from the transport device, and the remaining medium is transferred from the transport device to the substrate.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: October 1, 2002
    Assignee: Stork Textile Printing Group B.V.
    Inventors: Lothar Wefers, Josef Juffinger
  • Patent number: 6453809
    Abstract: Squeegee device for applying printing medium to a substrate, interacting with a squeegee element which is made at least partially from a magnetizable material and can be moved between an operating position and an at-rest position, which squeegee device comprises a support frame for delimiting an operating space, inside which the operating position of the squeegee element is located, and magnetic means which are provided on the support frame for generating a magnetic field at the location of a designated bearing-wall part of the support frame in order to pull the squeegee element onto the bearing-wall part in the at-rest position, in which device switching means are provided, which interact with the magnetic means in order to apply the magnetic field at the location of the bearing-wall part in a switched-on position and to substantially eliminate the magnetic field at the location of the bearing-wall part in a switched-off position.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: September 24, 2002
    Assignee: Stork Brabant B.V.
    Inventor: Henricus Gerardus M. Kempen
  • Patent number: 6412407
    Abstract: A screen printing apparatus with a circular screen (1) and a squeegee (2) therein and an impression cylinder (3). A system that is synchronized with a screen drive device and the impression cylinder (3), and lifting the squeegee (2) in controlled manner. The system includes at least one cam disk (14) which, via a squeegee lever (16), moves the squeegee (2) into the desired position.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: July 2, 2002
    Assignee: Gallus Ferd Ruesch AG
    Inventors: Heinz Brocker, Hansrudolf Frick
  • Patent number: 6382097
    Abstract: An ink supplying roller (17) is disposed in a rotary cylindrical drum (16), and is moved so that the ink supplying roller (17) can be brought into contact with an inner peripheral surface of a cylindrical circumferential wall (15). The ink supplying roller (17) is placed at a contact position with an ink permeable portion (15a) of the circumferential wall (15). The rotary cylindrical drum (16) is rotated in a state in which a stencil sheet (M) is not wound around the rotary cylindrical drum (16). Therefore, ink (50) drawn out through the ink permeable portion to the outer peripheral surface of the circumferential wall (15) because the stencil sheet (M) is peeled off at the stencil discharging operation is pulled into the ink permeable portion of the circumferential wall (15) by negative pressure produced by the ink supplying roller (17) coming in contact with the inner peripheral surface of the circumferential wall (15) and is removed.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: May 7, 2002
    Assignee: Riso Kagaku Corporation
    Inventors: Hiroshi Watanabe, Kenji Oshima, Hideyuki Kinoshita, Kenji Yoshida
  • Patent number: 6345573
    Abstract: In the multi-drum type rotary stencil printer adapted to drive a plurality of printing drums altogether in synchronization with one another by a common drive mechanism, when one of the printing drums is placed out of engagement with a printing, a degradation of ink is anticipated in the temporarily rested printing drum due to its excessive stirring during an idling rotation. In order to avoid such an ink degradation, a clutch is incorporated in a route of transmitting a driving force from the common drive mechanism to each of the printing drums, so that the transmission of the driving force through each of the route can be selectively interrupted.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: February 12, 2002
    Assignee: Riso Kagaku Corporation
    Inventors: Katsuro Motoe, Mitsuru Takeno, Masakazu Miyata
  • Patent number: 6336401
    Abstract: A stencil printer of the type including a print drum around which a master is to be wrapped is disclosed. A press roller presses a paper sheet or similar recording medium against the master wrapped around the print drum. A press roller displacing device moves the press roller between an operative position where it presses the recording medium against the master and an inoperative position where it is spaced from the print drum. A press roller driving device causes the press roller held at the inoperative position to rotate, at a position where the roller faces the print drum, in the same direction as the direction in which the drum rotates during printing. The press roller driving device causes the press roller to rotate only when the roller is held at the inoperative position. The printer is capable of effecting preliminary rotation of the press roller at a stable, accurate speed with a relatively simple configuration while freeing the master, recording medium and print drum from loads.
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: January 8, 2002
    Assignee: Tohoku Ricoh Co., Ltd.
    Inventor: Daisuke Hasebe
  • Patent number: 6336400
    Abstract: According to the stencil printing machine of the present invention, the printing drum unit is moved from a side direction to the pulled-out first support rail so that the one support rod is supported. That is, unnecessary becomes the operation of holding up the printing drum unit once upwards and then bringing down the unit. Moreover, the one support rod is supported so that the printing drum unit is provisionally supported. Thus, this unit can be supported by one hand. In this state, the second support rail is pulled out and the other support rod is supported by the second support rod, so that the pair of the support rods is supported by the first and second support rails. In this way, setting-up of the printing drum unit is completed.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: January 8, 2002
    Assignee: Riso Kaguku Corporation
    Inventors: Masaki Orimoto, Hideaki Nogi
  • Patent number: 6324972
    Abstract: Rotary screen-printing device for printing a substrate, includes at least one printing station for a removable stencil, a printing-medium feed and a squeegee, substrate-conveying means for guiding a substrate past the printing station, first and second stencil-bearing means for supporting opposite ends of the stencil, and first and second support means for supporting opposite ends parts of the squeegee. The second support means includes a moveable support member which can move between a position in which it supports the squeegee and a position in which it does not support the squeegee. The first support means being designed in such a manner that it is able to hold the squeegee in a floating position if the support member of the second support means is in the non-supporting position. The first support means includes a support member and a delimiting member.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: December 4, 2001
    Assignee: Stork Brabant B.V.
    Inventor: Henricus G. M. Kempen
  • Patent number: 6293190
    Abstract: A stencil printer operable with a master wrapped around a print drum includes a rotatable print drum. An ink roller is rotatable in the same direction as the print drum for feeding ink to the inner periphery of the drum. An ink replenishing roller is rotatable in the same direction as the print drum and ink roller and movable between a first position where it is spaced from the inner periphery of the drum and ink roller and a second position where it contacts the inner periphery of the drum and ink roller. An ink collecting member is located downstream of the ink replenishing roller in the direction of rotation of the print drum and movable in interlocked relation to the ink replenishing roller. The printer is capable of surely removing excess ink from the inner periphery of the print drum and desirably forming even the first image after a long time of suspension.
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: September 25, 2001
    Assignee: Tohoku Ricoh Co., Ltd.
    Inventor: Michihiro Yashima
  • Publication number: 20010020422
    Abstract: An ink supplying roller (17) is disposed in a rotary cylindrical drum (16), and is moved so that the ink supplying roller (17) can be brought into contact with an inner peripheral surface of a cylindrical circumferential wall (15). The ink supplying roller (17) is placed at a contact position with an ink permeable portion (15a) of the circumferential wall (15). The rotary cylindrical drum (16) is rotated in a state in which a stencil sheet (M) is not wound around the rotary cylindrical drum (16). Therefore, ink (50) drawn out through the ink permeable portion to the outer peripheral surface of the circumferential wall (15) because the stencil sheet (M) is peeled off at the stencil discharging operation is pulled into the ink permeable portion of the circumferential wall (15) by negative pressure produced by the ink supplying roller (17) coming in contact with the inner peripheral surface of the circumferential wall (15) and is removed.
    Type: Application
    Filed: March 2, 2001
    Publication date: September 13, 2001
    Inventors: Hiroshi Watanabe, Kenji Oshima, Hideyuki Kinoshita, Kenji Yoshida
  • Patent number: 6286422
    Abstract: A novel apparatus for compressing viscous material through openings in a stencil is disclosed. The novel apparatus has a compression head cap which provides a contained environment to direct and to aid the flow of pressurized viscous material through the openings in the stencil.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: September 11, 2001
    Assignee: Visteon Global Tech., Inc.
    Inventors: Jeff (Jin Her) Lin, John Trublowski, Vinh Van Ha