Paper Base (e.g., Calendering, Etc.) Patents (Class 427/361)
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Patent number: 5378503Abstract: A web coater is provided with a doctor blade having an active edge or tip engaging the web at a predetermined position. The force applied by such active edge is adjusted by movement of jaws gripping the opposite edge of the blade. The jaws are moved along a curve empirically established to maintain the active edge of the blade in a predetermined fixed position during the adjustment. The angle of incidence of the active edge of the blade relative to the web is also maintained constant by pivoting a blade supporting frame about an axis coincident with the active edge. A controller is supplied with empirically established data developed by utilizing test blades to establish polynomial formulas having constants corresponding to each of the various blades intended to be used by the coater. The controller also automatically compensates for blade wear.Type: GrantFiled: May 24, 1993Date of Patent: January 3, 1995Assignee: The Kohler Coating Machinery CorporationInventors: Herbert B. Kohler, Michael L. Schmidt
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Patent number: 5352418Abstract: A filtering material employable for a variety of application fields in the form of a sanitary mask, a deodoring filter or the like comprises calcium phosphate particles, .beta.-1,3-glucan and a band-shaped raw material, and the calcium phosphate particles each serving as a filtering medium are caused to adhere to the sheet-shaped raw material with the aid of the .beta.-1,3-glucan serving as a binder. A method of producing a filtering material is practiced by way of a first step of stirring a predetermined quantity of calcium phosphate particles and a predetermined .beta.-1,3-glucan in hot water at a high speed to prepare an aqueous treatment solution, a second step of dipping a sheet-shaped raw material in the aqueous treatment solution and taking up the sheet-shaped raw material, and a third step of drying the sheet-shaped raw material after completion of the taking-up operation.Type: GrantFiled: November 5, 1992Date of Patent: October 4, 1994Assignees: Sumiaki Tsuru, Kunihiro YamamotoInventor: Sumiaki Tsuru
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Patent number: 5340611Abstract: In a process for the coating of a running web of paper or cardboard, provisions are that in a press gap formed between two rolls a coating substance applied in a very small quantity on the surface of the one roll is first pressed on the web leaving a very thin coat on the web which, however, covers all spots including the "mounds" of microroughness. Next, the second coat can be applied and dosed on the still moist first coat with the usual means. In the process, the first coat is preferably dosed on the shell of the first roll, by means of the peripheral grooves of a rotary doctor. The same may be performed also as regards the second coating on the web.Type: GrantFiled: December 20, 1990Date of Patent: August 23, 1994Assignee: J. M. Voith GmbHInventors: Martin Kustermann, Hans-Peter Sollinger
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Patent number: 5336528Abstract: Heat sealable paper can be prepared by applying to a surface-sized paper web a coating of a dispersion comprising a microcrystalline wax and a copolymer of ethylene and acrylic acid or methacrylic acid. The coating can be applied by means of a size press between dryer sections in a paper machine. The coating neither adheres to nor leaves a residue on the heated drums in the dryer section following the size press.Type: GrantFiled: January 15, 1993Date of Patent: August 9, 1994Assignee: James River Paper Company, Inc.Inventor: Reinhard D. Bohme
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Patent number: 5270103Abstract: Disclosed is a receiver sheet which comprises a substrate and a coating which comprises a pigment and a binder comprising polyvinyl alcohol and an additional binder component selected from the group consisting of styrene-butadiene latices, cationic polyamines, cationic polyacrylamides, cationic polyethyleneimines, styrene-vinyl pyrrolidone copolymers, styrene-maleic anhydride copolymers, polyvinyl pyrrolidone, vinyl pyrrolidone-vinyl acetate copolymers, and mixtures thereof. When the receiver sheet is a coated paper, the paper substrate has a Hercules sizing degree of at least about 50 seconds and a basis weight of less than about 90 grams per square meter. When the receiver sheet is a transparency, the substrate is substantially transparent. The receiver sheet is particularly suitable for printing with aqueous based inks, such as those employed in ink jet printing systems.Type: GrantFiled: November 21, 1990Date of Patent: December 14, 1993Assignee: Xerox CorporationInventors: John F. Oliver, Richard E. Sandborn
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Patent number: 5245920Abstract: The calendering occurs in a press nip of a calender with application of pressure, moisture and heat. To achieve a desired surface quality, the surface of the paper or cardboard web which is to be calendered is brought in the press nip to a condition above the glass transition curve of the materials. Prior to expiration of 20 to 60 milliseconds, the surface of the paper web departing from the press nip is subjected to a transition step by virtue of a cooling device first in combination with a change in moisture content to a condition beneath the glass transition point of the material. The cooling can occur during contact of the surface to be cooled with a cooled surface or by direct contact with a cooling, preferably inert gas. After calendering there thus arises a diminished increase in the roughness of the paper web, so that the surface quality obtained in the press nip is predominantly retained. There have been illustrated suitable apparatuses for carrying out the method.Type: GrantFiled: June 20, 1991Date of Patent: September 21, 1993Assignee: Sulzer Escher Wyss GmbHInventor: Harald Hess
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Patent number: 5192592Abstract: A method of coating a substrate with an aqueous coating composition that includes an alkali-swellable associative thickener is disclosed. The associative thickener is produced from a monoethylenically unsaturated carboxylic acid, a monoethylenically unsaturated monomer lacking surfactant capacity, a non-ionic urethane monomer, and, optionally, a polyethylenically unsaturated monomer.Type: GrantFiled: March 5, 1992Date of Patent: March 9, 1993Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventor: Gregory D. Shay
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Patent number: 5171612Abstract: A coating process for coating traveling webs comprises applying a first coating layer of a pigment substance on a portion of the shell surface of a rotatable roll not covered by the material web, and pressing the pigment substance onto the web in a press gap, thereby impregnating the web. This makes it possible to apply with maximum uniformity and without web breaks and wrinkles a second coating layer of a pigment substance immediately successive to the application of the first layer, while the first layer is still moist.Type: GrantFiled: January 7, 1992Date of Patent: December 15, 1992Assignee: J. M. Voith GmbHInventor: Hans-Peter Sollinger
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Patent number: 5153047Abstract: A release carrier includes a dimensionally stable release paper of the prior art, but also includes a crystallizable polymer which has spherulite formations on its exposed surface. The preferred crystallizable polymer is polypropylene. The release carriers can be reconditioned to remove surface defects, change the level of gloss and form patterned areas of differential gloss by heating the polyolefin layer above its melting point and quenching the layer under controlled conditions. By quenching the crystallizable polymer by contacting the surface of the release carrier opposite the crystallizable polymer with a chill roll, the transfer of defects in the chill roll or planishing roll to the release carrier surface is avoided.Type: GrantFiled: September 25, 1991Date of Patent: October 6, 1992Assignee: Armstrong World Industries, Inc.Inventors: Joseph L. Mackey, Sr., William Y. Whitmore
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Patent number: 5151124Abstract: A method for forming a hydrothermally aggregated kaolin clay pigment, comprising: preparing an aqueous slurry of a particulate kaolin clay, sodium silicate, and finely divided calcium carbonate, having a total solids concentration of from about 10 to 20% by weight; the non-aqueous components including 60 to 80 parts per hundred by weight of said kaolin and from 10 to 20 pph by weight each of said sodium silicate and said calcium carbonate; and hydrothermally treating said slurry in a closed system to form aggregates of adherent kaolin platelets.Type: GrantFiled: June 4, 1990Date of Patent: September 29, 1992Assignee: ECC America Inc.Inventor: C. Arlyn Rice
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Patent number: 5137678Abstract: To achieve desired treatment results at both sides of a material web to be calendered, the material web is initially guided through a first nip formed between yieldable elastic surfaces confronting the throughpassing material web. In the first nip there is predominantly applied a relatively high pressure to the material web. Then the material web is guided through a successively arranged second nip formed between practically non-yieldable hard surfaces confronting the throughpassing material web. In the second nip there is applied, apart from pressure, in particular heat to the material web. The treatment result achieved in the first nip, namely the smoothness and glaze values of the treated material web, are augmented at both sides of the material web to achieve desired treatment effects.Type: GrantFiled: April 8, 1991Date of Patent: August 11, 1992Assignee: Sulzer Escher Wyss GmbHInventors: Harald Hess, Rudiger Kurtz
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Patent number: 5118533Abstract: A high quality coated paper for printing having excellent smoothness, gloss and printability is provided by using a coating composition mainly composed of a pigment and a latex of heterogeneous polymer particles consisting of a hard polymer domain having a glass transition temperature of 80.degree. to 220.degree. C. and a soft polymer domain having a glass transition temperature of 25.degree. to 95.degree. C. in combination with a high temperature calender finishing.Type: GrantFiled: September 13, 1989Date of Patent: June 2, 1992Assignee: Kanazaki Paper Mfg. Co., Ltd.Inventors: Soichi Saji, Teruo Nakamura, Akira Takada
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Patent number: 5108531Abstract: A method of highly accurate printing using a web offset press, particularly suited for stereographic printing. Consistent reproductions of a composite image are produced on a paper web, and registry between the image and an embossed screen is maintained, by preshrinking (e.g., reducing the moisture content of) the paper prior to printing the composite image on the paper web. Preshrinking the paper prevents the subsequent ink drying operation from causing shrinkage of the paper and concomitant variations in the image, permitting inline formation of a screen in accurate registry with the image.Type: GrantFiled: May 5, 1989Date of Patent: April 28, 1992Assignee: Quad/Graphics Inc.Inventor: Thomas A. Quadracci
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Patent number: 5106655Abstract: An apparatus for controlling the cross-directional smoothness profile of the surface of a calenderable material substantially independently of the materials's caliper profile. A plurality of adjustable nozzles selectively direct jets of steam of selected velocities against sections of the material across the material's width and in counterflow to its movement, immediately before the material enters the last nip of a calender stack. Built-in steam control valves are provided to control the amount of steam applied to each section. Suction means may also be provided upstream of the nozzles, with reference to the movement of the calenderable material, to remove excess steam and thus prevent undesirable condensation on adjacent structures. The smoothness profile may be monitored and compared to a desired smoothness profile and the valves and nozzles may be adjusted accordingly.Type: GrantFiled: January 27, 1989Date of Patent: April 21, 1992Assignee: Measurex CorporationInventors: Mathew G. Boissevain, Bruce S. Taylor, Robert L. Beaman, Laslo Dudas
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Patent number: 5064692Abstract: A method and apparatus for producing a paper product having a surface with enhanced gloss. The method includes the following steps: Applying a continuous layer of an impressionable coating material to a paper product; contacting the layer of coating material with a polymer release film having a smooth and glossy surface substantially free of defects, the surface having non-adhering and release characteristics; and solidifying the coating material during contact with the release film. Using this technique, a smooth and glossy surface of the release film is substantially imparted to a surface of the layer of solidified coating material. In the case of clay-coated substrates, the coating is solidified by heating, whereas in the case of polyethylene-coated substrates, the coating is solidified by cooling. The end product is a coated substrate in which the coating has a glossy surface to which the texture of a film has been imparted.Type: GrantFiled: February 15, 1990Date of Patent: November 12, 1991Assignee: International Paper CompanyInventors: Leroy C. Hofmann, Robert W. Hicks, Jasper H. Field, Stephen H. Monroe
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Patent number: 5061461Abstract: A method for recovering a fine particle size fraction of a negatively charged mineral from an ore, such as a kaolin clay crude, which comprises forming an aqueous pulp of the ore, dispersing the pulp by adding thereto sufficient water-soluble organic cationic dispersant to impart a positive zeta potential to said particles and, preferably, an acidic pH to said pulp, removing coarse particles from said dispersed pulp and fractionating the dispersed pulp to separate a fine particle size fraction of mineral particles from coarser particles.Type: GrantFiled: August 22, 1990Date of Patent: October 29, 1991Assignee: Engelhard CorporationInventors: Paul Sennett, Steven A. Brown
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Patent number: 5049420Abstract: Microcapsules are applied in metered quantity to a paper web passing through an ingoing nip between a hard applicator roll and a soft backing roll. Metering is achieved by means of a deformable metering roll in adjustable pressure contact with the applicator roll and rotating in an opposite sense thereto to define an ingoing nip. Coating composition is fed to this nip from a pipe or by the roll dipping into a bath of coating composition. The metered coating emerging from the metering nip is re-distributed and smoothed by a deformable smoothing roll rotating in the same sense as the applicator roll and in contact therewith. The process facilitates application of relatively high solids microcapsule compositions at low wet coatweights.Type: GrantFiled: February 23, 1990Date of Patent: September 17, 1991Assignee: The Wiggins Teape Group LimitedInventor: Terence J. Simons
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Patent number: 5045342Abstract: A gloss control system is provided for controlling the surface gloss of a sheet material. The system provides separate and independent control of heat and moisture applied to the sheet material, rather than the fixed ratio of heat and moisture applied by previous steam shower systems. Heat may be applied by a plurality of infrared lamps whose radiation is directed to the sheet material surface. A plurality of upwardly facing atomizing spray nozzles act to provide streams of atomized water directed at the surface of the sheet material. A scanning gloss sensor detects the degree of surface gloss of the sheet material at various cross-directional locations and control the application of heat and moisture in accordance with the detected surface gloss to thereby achieve a desired gloss profile.Type: GrantFiled: January 27, 1989Date of Patent: September 3, 1991Assignee: Measurex CorporationInventors: Mathew G. Boissevain, Pierre Charette, Fernand Ostiguy, Barclay W. Wallace
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Patent number: 5033373Abstract: A process for producing a smooth and glossy surface on a paper web and a calender arrangement for carrying out the process are disclosed. The calender arrangement comprises two sets of rolls through which the paper web is conducted in succession. Each set of rolls comprises a highly heated hard roll and a soft roll. A cooling device arranged upstream of at least one of the nips formed between the roll sets restricts the amount of heat transfer to the inner layers of the paper web and the attendant, undesirable partial plasticization of the inner layers of the web.Type: GrantFiled: May 3, 1989Date of Patent: July 23, 1991Assignee: Eduard Kusters Maschinenfabrik GmbH & Co. KGInventors: Bernhard Brendel, Klaus Kubik
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Patent number: 4973441Abstract: The method includes the steps of coating the peripheral surface of a roll with a film of plasticizer. An offset roll disposed adjacent to the roll is rotated such that the roll and the offset roll define therebetween a transfer nip so that a film of the plasticizer is transferred to the offset roll. The web is moved past the offset roll such that the web contacts the offset roll downstream relative to the transfer nip so that the film of the plasticizer is offset onto the web. The web is then passed with the offset coating of plasticizer through a calendering nip such that between the offset coating of the web and the subsequent calendering of the web with the offset coating, the plasticizer is permitted to uniformly and controllably penetrate into the web such that the Z-directional compressibility of the web is controlled prior to the web extending through the calendering nip.Type: GrantFiled: July 26, 1989Date of Patent: November 27, 1990Assignee: Beloit CorporationInventor: Samuel F. Keller
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Patent number: 4935097Abstract: A paper having an absolute dry moisture content (moisture content in absolute dry condition) of 1.8-7% is subjected to a heat calendering treatment at a temperature of 150.degree.-300.degree. C. under a linear pressure of 40 kg/cm or above to provide a paper which has both satisfactory surface smoothness and rigidity (stiffness) and is suited for use as a photographic support.Type: GrantFiled: August 15, 1988Date of Patent: June 19, 1990Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Naoya Tashiro, Hiroshi Uehara
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Patent number: 4857126Abstract: In the making of coated paper products an improved process is disclosed for separating wet, semi-dry or dried coated paper from an application unit or a drying roll. The process comprises the steps of providing a paper web with a release composition in the form of an aqueous layer or film including the reaction product of alkanolamine and a fatty acid in equimolar proportions, providing an agent to maintain the pH factor to predetermined level and adding preselected amounts of a viscosity-regulating substance and water. The release composition may be applied directly to a drying roll or drum or to fluting rolls use for corrugated paperboard.Type: GrantFiled: April 25, 1984Date of Patent: August 15, 1989Assignee: Sodra Skogsagarna ABInventors: Christer Soremark, Ingemar Olsson
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Patent number: 4826536Abstract: The invention relates to a structured kaolinitic pigment having improved physical and optical characteristics when incorporated as a filler or coating pigment in paper. The pigment consists of porous aggregates of kaolin particles which are chemically bonded together. The pigment may be produced by chemically reacting a particulate kaolin with a metal chloride, such as silicon tetrachloride, and with urea or an organic amine. The process is conducted under conditions such that the kaolinite structure is not altered.Type: GrantFiled: January 9, 1987Date of Patent: May 2, 1989Assignee: E.C.C America Inc.Inventors: Rasik H. Raythatha, E. Wayne Andrews
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Patent number: 4820554Abstract: A coated paper of improved optical and printing qualities, coated with a structured kaolinitic pigment. The pigment consists of porous aggregates of kaolin particles which are chemically bonded together. The pigment may be produced by chemically reacting a particulate kaolin with a metal chloride, such as silicon tetrachloride. The process for preparing the structured pigment is conducted under conditions such that the kaolinite structure is not impaired.Type: GrantFiled: October 14, 1986Date of Patent: April 11, 1989Assignee: E.C.C. America Inc.Inventors: J. Philip E. Jones, Rasik H. Raythatha
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Patent number: 4816074Abstract: A process is described in which a structured aggregated kaolin pigment is prepared by mixing substantially dry kaolin in particulate form with an aqueous alkali metal silicate to deposit on the surface of the kaolin particles a substantially molecular level of said silicate without formation of silica gel, drying the treated kaolin without calcination and exposing it to an acidic gas. The product is useful as a pigment in the coating or filling of paper.Type: GrantFiled: January 28, 1988Date of Patent: March 28, 1989Assignee: E.C.C. America Inc.Inventors: Rasik H. Raythatha, E. Wayne Andrews
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Patent number: 4808445Abstract: A coating apparatus is disclosed for applying a coating material to the surface of a paper web. The coating apparatus includes a backing roll and an applicator roll which cooperates with the backing roll for defining therebetween a gap for the passage therethrough of the web. The backing roll and applicator roll counter-rotate at given speeds and a nip roll movably cooperates with the backing roll for defining therebetween a nip section. The nip section is disposed downstream relative to the gap such that the web extends progressively through the gap and through the nip section so that the coating material is applied to the surface of the web during passage of the web through the gap and nip section.Type: GrantFiled: August 26, 1987Date of Patent: February 28, 1989Assignee: Beloit CorporationInventors: Haruyoshi Fujiwara, Toshihiro Toyofuku
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Patent number: 4806167Abstract: The invention relates to an aggregated kaolinitic pigment having improved physical and optical characteristics when incorporated as a filler or coating pigment in paper. The pigment may be produced by treating a particulate kaolin with an alkaline earth metal carbonate or hydroxide or alkali metal carbonate, and urea or an organic amine. The pigment consists of porous aggregates of kaolin particles.Type: GrantFiled: April 27, 1987Date of Patent: February 21, 1989Assignee: E.C.C. America Inc.Inventor: Rasik H. Raythatha
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Patent number: 4786529Abstract: A device for controlling the cross-directional gloss profile on the surface of a calenderable material by selectively directing jets of steam against sections of the material across its width. Built-in steam flow control valves are provided to control the amount of steam applied to each section. Suction means may also be provided to remove excess steam and thus prevent undesirable condensation on adjacent structures. The gloss finish may be monitored and compared to a desired gloss finish and the valves are activated accordingly.Type: GrantFiled: June 15, 1987Date of Patent: November 22, 1988Assignee: Measurex CorporationInventor: Mathew G. Boissevain
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Patent number: 4770934Abstract: An ink jet recording medium having at least one ink receptive layer containing synthetic silica of fine particle form as a main pigment, having a recording surface dried by pressing said recording surface against a heated mirror surface, and having ink receptive layer having an absorption capacity of at least 10 g/m.sup.2 is disclosed.That is, the present invention provides an ink jet recording medium which has a gloss without requiring any post-treatment for imparting the gloss, has a high ink absorbability and gives a high color reproducibility and a high color density in printing with a water-base ink, particularly a recording medium for full color ink jet recording having a gloss.Type: GrantFiled: December 31, 1986Date of Patent: September 13, 1988Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Takeshi Yamasaki, Masao Suginaga
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Patent number: 4766015Abstract: Phospholipids such as lecithins provide improved rheological properties for coating a rapidly moving web, such as a paper web. The phospholipids are preferably applied to the paper web as part of a coating mixture, and they can be included in the coating mixture by first including the phospholipid in a lubricant additive mixture that includes an emulsifier, a fatty acid vehicle, and plasticizer. The lubricant is well-suited for short-dwell coating methods.Type: GrantFiled: April 21, 1987Date of Patent: August 23, 1988Assignee: Bercen, Inc.Inventors: Koyu Nikoloff, Raymond J. Peltier
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Patent number: 4751111Abstract: The improvement in the production of low sheet gloss coated papers which comprises using as the synthetic polymer latex binder for the aqueous coating composition employed to coat the papers, a carboxylated latex which substantially swells during the preparation of the aqueous coating composition and subsequently shrinks during the drying of the coated paper, whereby a microscopic surface roughness is obtained to yield a low sheet gloss coated paper while retaining high ink gloss.Type: GrantFiled: May 2, 1986Date of Patent: June 14, 1988Assignee: The Dow Chemical CompanyInventors: Do I. Lee, Ronald E. Hendershot
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Patent number: 4749445Abstract: Disclosed in a process for producing gloss and smoothness on the surface of a paper web, comprising:A. advancing a web of papermaking fibers through a nip formed by a smooth metal finishing drum and a resilient backing roll; andB. heating the drum to a temperature at least high enough to heat a substrata portion of the web to a temperature in which gloss and smoothness rapidly increase with increasing temperature due to thermoplastic molding of the substrata beneath the surface and at a temperature higher than where substantial gloss and smoothness would have already been obtained by molding of the surface of the web.Type: GrantFiled: July 3, 1986Date of Patent: June 7, 1988Assignee: S. D. Warren CompanyInventor: Jay H. Vreeland
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Patent number: 4732776Abstract: An apparatus and a method for controlling the thickness of coatings on webs at a plurality of cross-directional positions while a coating procedure is taking place. The deflection of the metering element is controlled automatically in response to measurements of the uncoated and coated web that determine the thickness of the coating being applied at a plurality of cross-directional positions. In one preferred embodiment, a bimetallic member having a plurality of separated tongue-like extensions corresponding to cross-directional positions along the blade is used, the tongue-like extensions pressing on the back of the blade at their ends in response to heat applied dependent upon the determined thickness of the coating being applied. In another embodiment, pneumatic actuators whose pressure may be varied in response to the determined thickness are used to adjust the position of the metering element at a plurality of cross-directional positions to locally vary the thickness of the applied coating.Type: GrantFiled: February 24, 1987Date of Patent: March 22, 1988Assignee: Measurex CorporationInventor: Matt Boissevain
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Patent number: 4624744Abstract: Disclosed in a process for producing gloss and smoothness on the surface of a paper web, comprising:A. advancing a web of papermaking fibers through a nip formed by a smooth metal finishing drum and a resilient backing roll; andB. heating the drum to a temperature at least high enough to heat a substrate portion of the web to a temperature in which gloss and smoothness rapidly increase with increasing temperature due to thermoplastic molding of the substrate beneath the surface and at a temperature higher than where substantial gloss and smoothness would have already been obtained by molding of the surface of the web.Type: GrantFiled: May 18, 1984Date of Patent: November 25, 1986Assignee: S. D. Warren CompanyInventor: Jay H. Vreeland
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Patent number: 4567098Abstract: Metallized paper whose metal layer has been deposited by evaporation in vacuo onto a cast-coated paper. The cast coating contains mineral pigments, latex binders and conventional additives, and at least 5 parts by weight of the pigment are a synthetic polymer pigment. The coating material has a pH value >7 and during the process of fabricating the metallized paper it is deposited in such an amount that, after the drying, 10-30 g/m.sup.2 of cast coating are present. The coating material deposited onto a paper web is dried until its moisture content is 5-15% and the web is then pressed with the coated paper surface against a drum with a highly polished surface at a temperature of 100.degree.-160.degree. C. by means of a roll with a nip >1000 N/cm.Type: GrantFiled: July 6, 1983Date of Patent: January 28, 1986Assignee: Zanders Feinpaiere AGInventors: Franz-Josef Becker, Erich Hubner, Walter Lammerich
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Patent number: 4555417Abstract: A method of preparing a substrate coated with a proteinaceous foaming composition wherein the substrate is coated with the foamed composition and the foamed composition is mechanically disintegrated to form a continuous surface coating upon the substrate. The foamed composition is prepared by ingesting gas into an aqueous medium containing a proteinaceous foaming composition consisting essentially of at least one proteinaceous foaming component selected from the group consisting of vegetable protein hydrolyzate having at least two different chelating sites, egg albumen, and casein hydrolyzate; alkaline earth metal ions, and zinc ions.Type: GrantFiled: April 8, 1983Date of Patent: November 26, 1985Assignee: A. E. Staley Manufacturing CompanyInventors: Paul W. Gibson, Frank T. Orthoefer
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Patent number: 4554175Abstract: Disclosed is a method of producing a support for a photographic paper, which comprises applying primary irradiation of electron beams to at least one coated layer formed on one side or both sides of a substrate and curable by irradiation of electron beams, bringing the surface of said coated layer into contact with a form member and then peeling it from the form member, followed by applying secondary irradiation of electron beams to the coated layer. The primary irradiation is carried out in the manner that the surface of the coated layer may hold shapes substantially corresponding to shapes on the surface of the form member at the stage where the coated layer has been peeled off from the form member.Type: GrantFiled: March 15, 1984Date of Patent: November 19, 1985Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Toshiaki Shibue, Koichi Nagayasu
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Patent number: 4547392Abstract: A transferable dye medium for use in a thermal printer is made by applying a layer of dye material to a base layer; softening the applied layer of dyed material, as by heating same, and then calendering the softened, dye-coated base layer.Type: GrantFiled: March 9, 1984Date of Patent: October 15, 1985Assignee: Sony CorporationInventors: Osamu Majima, Shigemichi Honda
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Patent number: 4543280Abstract: A pigmented coating composition comprising a pigment consisting of kaolin clay or TiO.sub.2 or the mixture thereof, or a pigment wherein Al(OH).sub.3 is further blended therein, and also comprising an adhesive consisting of crosslinkable ethylenevinylacetate copolymer aqueous emulsion combined with a crosslinker or of crosslinkable polyacrylate copolymer aqueous emulsion combined with a crosslinker of water-soluble polymaidepolyurea resin and the pigment above and the mixed adhesive are formulated in a ratio of 85:15 to 70:30 as coating composition. This pigmented adhesive composition is primed on the substrate paperboard. Thereby finished ovenable paperboards, being capable of retaining the brightness at least 45% against the heat-treatment of 250.degree. C. for 20 minutes, is free from scorch even in an electrically heating oven and is excellent in adhesion to extrusion-laminating plastic layer.Type: GrantFiled: March 5, 1984Date of Patent: September 24, 1985Assignee: Kohjin Co., Ltd.Inventors: Yuji Fujita, Keizo Wakasugi, Ryoichi Kaneko
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Patent number: 4539225Abstract: In order to produce a heat-sensitive record material having high speed recordability without fogging a heat-sensitive record material having a heat-sensitive record layer coated thereon is passed through a nip between a metal roll and an elastic roll of 42.degree. to 69.degree. Shore-D hardness defined by ASTM Standard, D-2240 at a nip pressure enough to obtain a Bekk smoothness of 150 seconds or above on the record layer surface.Type: GrantFiled: February 17, 1984Date of Patent: September 3, 1985Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Kazuo Kojima, Hitoshi Yamahira, Yoshitaka Oeda
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Patent number: 4518637Abstract: In method of metering a coating solution, a coil bar is rotatably supported on a holder, and after a coating solution is applied to a web which is continuously run, a surplus of coating solution is scraped off with the coil bar, metering is carried out while a solution which is substantially the same in composition as said coating solution is supplied continuously to both sides of the coil bar which are before and after in the direction of run of the web, at a predetermined flow rate.Type: GrantFiled: May 19, 1983Date of Patent: May 21, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideo Takeda, Tsunehiko Sato
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Patent number: 4518651Abstract: A flexible composite material is disclosed which exhibits a controlled absorption of microwave energy based on presence of particulate carbon in a polymeric matrix bound to a porous substrate. The material is used in packages for microwave cooking. A process for making the material is also disclosed.Type: GrantFiled: February 16, 1983Date of Patent: May 21, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventor: William R. Wolfe, Jr.
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Patent number: 4467336Abstract: In ordinary heat-sensitive sheets using a colorless to light-colored dye precursor and a color developer which causes said dye precursor to develop a color by reacting with the dye precursor when heated, printability can be improved by establishing the maximum peaks of their void distribution curves at a void diameter of 1.0 .mu.m or less.Type: GrantFiled: July 7, 1983Date of Patent: August 21, 1984Assignee: Mitsubishi Paper Mills, Ltd.Inventor: Naomasa Koike
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Patent number: 4455346Abstract: A heat-sensitive recording paper comprising a paper support having coated thereon a heat-sensitive recording layer, which is surface-treated by passing said recording paper, after drying said heat-sensitive recording layer, through a pressure-applying member comprising a combination of a metal roll and an elastic roll of from 70 to 90 in Shore hardness wherein said heat-sensitive layer surface is contacted with said metal roll.Type: GrantFiled: June 21, 1982Date of Patent: June 19, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Akira Igarashi, Sukenori Nakamura
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Patent number: 4442179Abstract: A heat-sensitive recording paper which has on a paper support a heat-sensitive recording layer having received a surface treatment in such a state that the recording paper comes to contain moisture in a proportion ranging from 5 wt % to 12 wt % by drying after the coating of the heat-sensitive recording layer. The surface treatment is effected by passing the recording paper through a pressure applying means. The pressure applying means is constructed by metal roller heated up to a temperature of 40.degree. C. to 60.degree. C. and an elastic roller (made preferably of hard rubber). The recording layer is brought into a face-to-face contact with the metal roller.Type: GrantFiled: October 15, 1982Date of Patent: April 10, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Akira Igarashi, Sukenori Nakamura
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Patent number: 4423118Abstract: A coating composition, comprising an aqueous dispersion of a pigment such as clay and a binder such as a latex of a copolymer of styrene and butadiene thickened with a water-soluble copolymer of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid such as acrylic acid, an ethylenically unsaturated carboxamide such as acrylamide and an ethylenically unsaturated monomer having limited solubility in water such as acrylonitrile, is effectively employed in coating paper and other cellulosic web materials.Type: GrantFiled: August 20, 1981Date of Patent: December 27, 1983Assignee: The Dow Chemical CompanyInventors: Peter J. Corbett, Martin G. Aschwanden
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Patent number: 4416922Abstract: A method and apparatus are provided for metering and smoothing coating on a moving web of material, such as linerboard, paperboard, paper, film, foil or the like, in which the web is fed between a skimming rod below the coated side of the web and a skirt of flexible plastic sheet material extending across the full width of the upper or uncoated side of the web and having a free end portion extending in contact with and in the direction of movement of the web. A pressurized tube in contact with the free end portion of the skirt, causes the skirt to bear directly on the upper surface of the web and downwardly on the rod to create a constant pressure web coating region between the web and the rod within which the coating thickness is skimmed down by the rod to provide a layer of coating on the web of substantially uniform thickness.Type: GrantFiled: September 24, 1982Date of Patent: November 22, 1983Assignee: St. Regis Paper CompanyInventor: Robert M. Fridhandler
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Patent number: 4407690Abstract: A process is provided for coating of substrate webs with polyethylene wherein the edge thickening and other processing difficulties caused by the necking-in phenomenon are minimized. The process comprises extruding a polyethylene having a melt index between 30 dg/min and 100 dg/min through a slot in a slotted die in the form of a sheet onto the moving substrate web to form the coated web, and passing the coated web through a nip roll assembly comprising a chill roll and a nip roll, the slotted die having at the extremities of the slot therein edge guides which are maintained at a temperature above the melting temperature of the polyethylene and are contoured to guide the adhered edges of the extruded sheet into the throat of the nip roll assembly.Type: GrantFiled: March 10, 1982Date of Patent: October 4, 1983Assignee: Du Pont Canada Inc.Inventor: George White
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Patent number: RE31695Abstract: Two side coaters and methods of coating paper on both sides are disclosed in which a web of paper to be coated is moved in a generally upward direction in partially wrapped relation to a coating roll, so that one side of the web is in contact with and supported by the roll. This one side of the web is coated by a first coating material which is applied by the coating roll. This coating material is applied to the coating roll by an applicator roll, either directly in which a puddle is formed between the applicator roll and the coating roll, or through transfer from a pair of metering rolls in which the coating puddle is formed between the metering rolls.Type: GrantFiled: June 27, 1983Date of Patent: October 2, 1984Assignee: The Black Clawson CompanyInventor: Stanley C. Zink
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Patent number: RE33741Abstract: An apparatus and a method for controlling the thickness of coatings on webs at a plurality of cross-directional positions while a coating procedure is taking place. The deflection of the metering element is controlled automatically in response to measurements of the uncoated and coated web that determine the thickness of the coating being applied at a plurality of cross-directional positions. In one preferred embodiment, a bimetallic member having a plurality of separated tongue-like extensions corresponding to cross-directional positions along the blade is used, the tongue-like extensions pressing on the back of the blade at their ends in response to heat applied dependent upon the determined thickness of the coating being applied. In another embodiment, pneumatic actuators whose pressure may be varied in response to the determined thickness are used to adjust the position of the metering element at a plurality of cross-directional positions to locally vary the thickness of the applied coating.Type: GrantFiled: July 21, 1989Date of Patent: November 12, 1991Assignee: Measurex CorporationInventor: Matt Boissevain