Having Nonreactant Particles Of Defined Size Patents (Class 503/207)
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Patent number: 5278128Abstract: A reversible thermosensitive recording material composed of a support, an undercoat layer formed on the support, and a reversible thermosensitive recording layer formed on the undercoat layer, capable of reversibly assuming a transparent state and a white opaque state depending on the temperature thereof, the undercoat layer having at least one colored portion and at least one light reflecting portion.Type: GrantFiled: March 10, 1993Date of Patent: January 11, 1994Assignee: Ricoh Company, Ltd.Inventors: Yoshihiko Hotta, Atsushi Kutami, Makoto Kawaguchi, Tetsuya Amano
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Patent number: 5273824Abstract: A cored multi-shell emulsion particle consisting of a core particle, a void layer existing in the exterior of the core particle and a shell layer, each of which has a diameter of .phi., d and D, respectively, and the ratio of .phi., d and D is in the following range..phi./D=0.1-0.6d/D=0.2-0.8 (d>.phi.)The particle exhibits excellent hiding power, brightness, gloss and thermal insulation property as an organic pigment without impairing drying ability and strength of coated layer.Type: GrantFiled: February 1, 1991Date of Patent: December 28, 1993Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Futoshi Hoshino, Makoto Nakano, Kousuke Someya, Junko Morita, Takeshi Yanagihara, Akihiro Yamazaki
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Patent number: 5272127Abstract: The present invention provides a heat sensitive recording material comprising a substrate, a recording layer formed over the substrate and containing a colorless or light-colored basic dye and a color acceptor, and a protective layer formed over the recording layer, the recording material being characterized in that microcapsules having an ultraviolet absorber enclosed therein and having substantially no color forming ability are incorporated in the protective layer.Further, the present invention provides microcapsules having an ultraviolet absorber and as required an organic solvent enclosed therein, which have capsule wall film of synthetic resin and mean particle size of 0.1 to 3 .mu.m.Type: GrantFiled: December 4, 1992Date of Patent: December 21, 1993Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Ritsuo Mandoh, Takehiro Minami, Katsuhiko Ishida, Hisayoshi Mitoh
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Patent number: 5258350Abstract: A reversible heat-sensitive recording material comprising a resin matrix, an organic low molecular weight material, and a spherical filler, and a magnetic card obtained by forming a layer of the reversible heat-sensitive recording material on a magnetic recording member.Type: GrantFiled: August 6, 1992Date of Patent: November 2, 1993Assignee: Nitto Denko CorporationInventors: Yasushi Inoue, Yoshihiro Hieda
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Patent number: 5250492Abstract: Carbonless coating compositions which can be printed onto one or more sheets of a business form or mailer to provide a visible image which is sharper and darker than previous coatings are provided. The compositions also find use on security documents and safety papers to provide a covert image on the document beneath information which may be subject to attempted alteration, such as the amount written on a check. The covert image becomes visible upon the application of pressure or solvent in the area coated to provide evidence of the attempted alteration. The self-contained composition includes an admixture of a color former, a color developer, and a plurality of pressure-rupturable microcapsules containing a solvent. Another solvent-sensitive composition includes an admixture of a color former and a color developer.Type: GrantFiled: March 7, 1991Date of Patent: October 5, 1993Assignee: The Standard Register CompanyInventors: Mark D. Dotson, Frank V. Parenti
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Patent number: 5248652Abstract: A thermal transfer ribbon has a substrate, an undercoating which contains thermal reactive materials and leuco dyes, and a thermal transfer coating applied on the undercoating and which contains a mixture of a wax emulsion and a sensible material, the undercoating assisting the transfer of color images of an improved intensity and sharpness to a receiving medium upon the application of heat to the ribbon. The invention also covers incorporation of the leuco dye and a reactant in the functional coating to intensify the transferred image, with or without the presence of sensible materials such as iron oxide or fluroescent dye, to improve the sharpness and the scratch and smear resistance of the transferred image. An alternative to the two coatings is a single coating which includes pigments with sensing characteristics, thermal reactive material, and transfer agents to obtain an improved intensity image.Type: GrantFiled: October 9, 1991Date of Patent: September 28, 1993Assignee: NCR CorporationInventor: Shashi G. Talvalkar
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Patent number: 5238900Abstract: The heat-sensitive recording material is prepared by forming on a support successively a heat-sensitive recording layer containing a color former and a color developer which forms a color by reacting with the color former, an intermediate layer obtained by coating an aqueous solution or aqueous dispersion of a resin, and an overcoat layer containing a ionizing radiation curable resin, and then irradiating an ionizing radiation. The overcoat layer contains a silicone surface active agent and a low molecular weight polyolefin resin microball. The heat-sensitive recording material is excellent in recording runnability and printability as well as in color density of the recorded images and image-retainability.Type: GrantFiled: July 20, 1992Date of Patent: August 24, 1993Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventor: Sigekazu Shuku
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Patent number: 5231068Abstract: A thermosensitive recording material is composed of a support, an undercoat layer formed on the support, which is essentially composed of spherical-void plastic particles having an average particle diameter of 2 to 20 .mu.m and a voidage of 80% or more, and a thermosensitive coloring layer formed on the undercoat layer, which contains a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto.Type: GrantFiled: November 21, 1991Date of Patent: July 27, 1993Assignee: Ricoh Company, Ltd.Inventors: Shuji Miyamoto, Motoo Tasaka, Akie Murofushi
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Patent number: 5231117Abstract: A high solids content, aqueous, microcapsule-containing printing ink is prepared by forming microcapsules in situ in a printing ink vehicle. The microcapsules are preferably prepared by interfacial polymerization or interfacial crosslinking between a reactant, such as a polyisocyanate dissolved in an oily solution and a coreactant such as a polysalt of casein and diethylene triamine present in an aqueous solution into which the oily solution is dispensed. The aqueous solution contains water and preferrably a non-volatile diluent such as a non-reducing sugar, for example methyl glucoside. The oil-containing microcapsules contain an oil solvent and a mixture of dye precursors which upon reaction with a color developer produces an intense black image. The printing ink preferably has a 60-70% by weight solids content and may be used as a low-coat-weight CB coating for preparing carbonless copy paper.Type: GrantFiled: September 19, 1990Date of Patent: July 27, 1993Assignee: The Standard Register CompanyInventor: Michael E. A. Seitz
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Patent number: 5229349Abstract: A thermosensitive recording material is composed of a support, a thermosensitive coloring layer capable of inducing color formation upon application of heat thereto, formed on the support, and an overcoat layer formed on the thermosensitive coloring layer, the overcoat layer being essentially composed of a resin component which is crosslinked by a glycidylamine compound serving as a crosslinking agent for the resin component. A coating liquid for the formation of the overcoat layer is essentially composed of the resin component and the glycidylamine compound.Type: GrantFiled: September 25, 1991Date of Patent: July 20, 1993Assignee: Ricoh Company, Ltd.Inventors: Norio Kurisu, Hideo Aihara, Yoshifumi Noge, Yasuhiko Watanabe
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Patent number: 5223473Abstract: Disclosed is a carbonless paper set having at least two sheets, wherein a first sheet comprises paper coated on one surface with a color former and a second sheet comprises paper coated on one surface with a color developer, and wherein at least one of the sheets contains an oleophilic pigment filler material on the surface of the sheet opposite to that coated with the color former or color developer.Type: GrantFiled: November 21, 1990Date of Patent: June 29, 1993Assignee: Xerox CorporationInventors: John F. Oliver, David J. Sanders
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Patent number: 5212145Abstract: A heat sensitive recording material having a recording layer formed on a substrate and containing a colorless or light-colored basic dye and a color acceptor, the heat sensitive recording material being characterized in that at least one ethyleneimine derivative of the following formula (1) is contained in the recording layer as a preservability improving agent for record images ##STR1## wherein R.sub.1 is direct bond, --O--, --S--, --SO.sub.2 -- or C.sub.1 .about.C.sub.6 alkylene, R.sub.2 and R.sub.3 are each C.sub.1 .about.C.sub.4 alkyl, C.sub.1 .about.C.sub.4 alkoxyl or halogen atom, m and n are each zero or an integer of 1 to 4.Type: GrantFiled: July 23, 1992Date of Patent: May 18, 1993Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Tetsuo Tsuchida, Yasuji Koga, Haruo Omura, Yoshihiro Shimizu, Shuji Yoda
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Patent number: 5198406Abstract: This invention provides transparent thermographic recording films which exhibit good anti-stick properties, are scratch resistant and substantailly craze-free. The thermographic recording films comprise a transparent support carrying (a) a dye image-forming system comprising a di- or triarylmethane thiolactone dye precursor, an organic silver salt, a heat-fusible organic acidic material, and polyvinylbutyral as the binder; and, (b) a protective topcoat layer positioned above said dye image-forming system and comprising a water-insoluble polymeric binder, a mixture of at least two colloidal silicas having different average particle diameters in the proportion, by weight, of 1 part of silica having an average diameter of 50 nm or smaller and 0.3 to 1 part of silica particles having an average diameter no more than 40% of the larger sized silica particles, the ratio of total silica to binder being at least 3 parts per weight silica to 1 part per weight binder.Type: GrantFiled: December 16, 1991Date of Patent: March 30, 1993Assignee: Polaroid CorporationInventors: Jonathan M. Mack, Kang Sun
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Patent number: 5189007Abstract: A thermosensitive recording material is composed of a support, a thermosensitive coloring layer capable of inducing color formation upon application of heat thereto, formed on the support, and a protective layer including a resin and a filler formed on the thermosensitive coloring layer, the filler containing aluminum hydroxide or/and aluminum oxide particles, having a volume mean diameter of 1 .mu.m or less, with the amount of the particles with a diameter of 4 .mu.m or less being 90 vol. % or more in the entire particles.Type: GrantFiled: December 12, 1991Date of Patent: February 23, 1993Assignee: Ricoh Company, Ltd.Inventors: Hideo Aihara, Norio Kurisu, Kazuhiro Takei, Yasuhiko Watanabe
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Patent number: 5171730Abstract: In a heat-sensitive recording paper having a heat-sensitive color-forming layer formed on substrate paper, said substrate paper is impregnated with pigment particles in its surface and said pigment particles are made to present between surface fibers or said substrate paper for the purpose of providing high sensitivity without causing any undesired transfer of tailings to the thermal head.Type: GrantFiled: September 4, 1991Date of Patent: December 15, 1992Assignee: Oji Paper Co., Ltd.Inventors: Yasuyoshi Morita, Masaaki Matsuoka
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Patent number: 5169826Abstract: A CF ink and process which can be applied to a support sheet by standard transfer-litho press is provided. The nonvolatile printing ink which is capable of color development may be used to produce a CF carbonless copy sheet, or, in combination with a high solids, aqueous-based CB ink, to produce a CFB carbonless copy sheet. The ink includes from about 25 to 35% of a non-volatile oil, 25 to 35% of an acidic color developer, 20 to 50% filler, and 4 to 15% dispersed wax particles, all percentages by weight.Type: GrantFiled: October 26, 1990Date of Patent: December 8, 1992Assignee: The Standard Register CompanyInventors: Michael E. Seitz, Frank V. Parenti
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Patent number: 5162289Abstract: A subcoat of plastic pigment particles and a binder is provided beneath the microcapsule coating of otherwise conventional pressure-sensitive copying paper of the CB or CFB type. The plastic pigment particles may be hollow or solid. Inorganic pigment particles are preferably also present in the subcoat. The binder may be a mixture of styrene/butadiene latex and polyvinyl alcohol. The subcoat typically has a coatweight of 3 to 6 g m.sup.-2. The presence of the plastic pigment subcoat improves copying intensity, or permits a desired given copy intensity to be obtained at a lower microcapsule coatweight.Type: GrantFiled: March 25, 1991Date of Patent: November 10, 1992Assignee: The Wiggins Teape Group LimitedInventors: Gillian H. Betts, Terence Reid
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Patent number: 5141914Abstract: Disclosed is a heat-sensitive recording material useful in the manufacture of thermal paper and thermal labels. The material comprises a cellulosic or other suitable substrate, a thermally imprintable color-producing layer, and a protective layer over the color-producing layer. It may also include a second protective layer and/or a pressure-sensitive adhesive layer, on the surface of the substrate opposite from the color-producing layer, and a releasable liner covering the adhesive layer. The color-producing layer includes a basic, acid-neutralizing agent for both reducing background discoloration during manufacturing and increasing image definition. The protective layer comprises a cross-linked binder and fluorochemical surfactant-treated hydrocarbon or fluorocarbon particles as a friction reducing material.Type: GrantFiled: August 3, 1989Date of Patent: August 25, 1992Assignee: Nashua CorporationInventor: Ming-Huang J. Kang
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Patent number: 5135776Abstract: A heat-sensitive recording material is obtained by coating an aqueous dispersion which is prepared by mixing an aqueous dispersion of an electron donating colorless dye with an aqueous dispersion of an electron accepting compound on a base sheet. The aqueous dispersion of an electron donating dye is prepared by a method which comprises the steps of uniformly dispersing at least one electron donating colorless dye and at least one heat-fusible substance selected from the group consisting of 2-benzyloxynaphthalene, parabenzyl biphenyl, 1,4-bis(2-vinyloxyethoxy)benzene, bis [2-(4-methoxyphenoxy)ethyl] ether, 1,2-bis (3-methylphenoxy)ethane, 1,2-diphenoxyethane, benzyl 4-methylthiophenyl ether, 1-(2-methylphenoxy)-2-(4-methoxyphenoxy)ethane and oxalic acid dibenzyl ester with a dispersing binder and/or a surface active agent in water; and pulverizing thus obtained dispersion with use of a horizontal sand mill.Type: GrantFiled: June 27, 1990Date of Patent: August 4, 1992Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Shuki Okauchi, Kazuo Kojima
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Patent number: 5130291Abstract: A heat-sensitive recording paper includes a sheet substrate,a heat-sensitive developing layer formed on the surface of the sheet substrate which develops when heated, and a covering layer formed on the heat-sensitive developing layer. The covering layer includes a pigment prepared by coating the surface of natural mica with at least one of titanium oxide and iron oxide.The developing part of the heat-sensitive developing layer appears in a color different from that of the heat-sensitive developing layer due to a regular multiple reflection which takes place in the covering layer. Moreover, a non-developed part of the heat-sensitive developing layer has a pearl luster resulting from the regular multiple occurring in the covering layer.Type: GrantFiled: December 21, 1990Date of Patent: July 14, 1992Assignee: Osaka Sealing Printing Co., Ltd.Inventor: Katsumi Okuda
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Patent number: 5130289Abstract: Acid sized carbonless base paper incorporating a sulphate based filler, particularly calcium sulphate, is less base reactive than otherwise similar paper made using conventional clay (kaolin) fillers. Carbonless paper, particularly CB paper, made from such base is less susceptible to undesired discoloration arising from base reactivity.Type: GrantFiled: October 15, 1990Date of Patent: July 14, 1992Assignee: The Wiggins Teape Group LimitedInventors: John B. Cooper, Tracey A. Doman
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Patent number: 5128310Abstract: A thermosensitive recording material which comprises a support having a low Streckigt sizing degree, an undercoat layer comprising an oil absorbable pigment and a carboxymethyl cellulose, and a thermosensitive recording layer coated on the undercoat layer.The thermosensitive recording material of this invention can be used in a high speed recording system, since it has a high sensitivity, a high image quality and a low capacity to adhere stain to a thermal head, and these advantages can be improved further by adding an appropriate amount of paraffin wax to the undercoat layer. The thermosensitive recording material can be produced economically because a low cost material having a low Steckigt degree can be used as the support.Type: GrantFiled: June 18, 1991Date of Patent: July 7, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Hirofumi Mitsuo, Yoshiyuki Hoshi
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Patent number: 5124306Abstract: A heat-sensitive recording material comprising a substrate, an intermediate layer disposed on said substrate and a heat sensitive recording layer disposed on said intermediate layer, characterized in that said intermediate layer contains a pigment of 80 cc/100 g or more in oil absorption as the main constituent and an alkaline pigment of 8 or more in PH value in an amount of 0.1 to 25% by weight on the total amount of the pigments contained in said intermediate layer.Type: GrantFiled: June 19, 1990Date of Patent: June 23, 1992Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Tooru Yamamoto, Yoshihiro Shimizu, Toshio Kimura
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Patent number: 5106813Abstract: A thermosensitive recording paper is disclosed useful for thermosensitive recording which comprises a substrate, a thermosensitive recording layer and an undercoat layer interposed therebetween which contains 10 to 40 parts of a binder and 60 to 90 parts by weight of crosslinked polymer microparticles having a particle diameter of 0.2 to 5.0 .mu.m and a ratio of weight average diameter to number average diameter of 2.0 or less.Type: GrantFiled: March 28, 1990Date of Patent: April 21, 1992Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Futoshi Hoshino, Makoto Nakano, Kousuke Someya, Junko Morita, Takeshi Yanagihara
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Patent number: 5102856Abstract: A high solids contents, aqueous-based, self-contained printing ink is provided including, a non-volatile diluent, an acidic color developer, a binder, and a water soluble surfactant which is compatible with the binder in the ink, but which is incompatible with the binder when the ink has dried. The high solids, self-contained printing ink further includes microcapsules containing a dyestuff precursor that is capable of reacting with the acidic color developer to form a color. The ink may be used to prepare self-contained carbonless copy sheets.Type: GrantFiled: November 7, 1990Date of Patent: April 7, 1992Assignee: The Standard Register CompanyInventors: Gary W. Doll, Michael E. Seitz
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Patent number: 5098881Abstract: The present invention provides a heat sensitive recording material which comprises an aromatic isocyanate compound, an imino compound which reacts with said aromatic isocyanate compound upon application of heat to form a color and a metallic soap which is pulverized together with said imino compound. Preferably the metallic soap has an average particle diameter of 0.5-2.0 .mu.m. This heat sensitive material is excellent in sensitivity and can form an image or excellent stability.Type: GrantFiled: June 13, 1991Date of Patent: March 24, 1992Assignee: Mitsubishi Paper Mills Ltd.Inventors: Shigtetoshi Hiraishi, Susumu Yamanobe
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Patent number: 5094998Abstract: Disclosed in a fine-particle aggregate emulsion comprising aggregate particles formed from a copolymer (a) composed of an unsaturated carboxylic acid and a vinyl monomer copolymerizable therewith, and a foreign polymer (b) formed by polymerization of a vinyl monomer differing in composition from that used in copolymer (a), foreign polymer (b) being present in the form of particles having a diameter of 0.05 to 0.5 .mu., the aggregate particles having a diameter of 0.2 to 3.0 .mu..This fine-particle aggregate emulsion is useful in paints, paper coating and information recording paper.Type: GrantFiled: October 19, 1990Date of Patent: March 10, 1992Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Futoshi Hoshino, Makoto Nakano, Takeshi Yanagihara
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Patent number: 5091356Abstract: A thermosensitive recording member comprises (1) a substrate, (2) a foamed dispersion layer, provided on the substrate, in which an aqueous, self-emulsifiable resin having an I/O value of 0.6 to 1.1 has been dispersed, and (3) a thermosensitive coloring layer, provided on the foamed dispersion layer, containing an electron-donating dye and an electron-accepting compound to present a color by reacting with the dye, improved in sensitivity.Type: GrantFiled: December 15, 1989Date of Patent: February 25, 1992Assignee: Kao CorporationInventor: Norihiko Nakashima
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Patent number: 5091357Abstract: A heat-sensitive recording material comprising a substrate, an intermediate layer formed on the substrate, and a heat-sensitive recording layer formed on the intermediate layer, said intermediate layer comprising an inorganic powder having an oil absorption of 50 ml/100 g or more as measured in accordance with JIS K5101, an aqueous adhesive and a carboxymethyl cellulose in an amount of 3 to 20% by weight based on the weight of the aqueous adhesive, and said heat-sensitive recording layer comprising an electron-donating, colorless dye precursor, an electron-accepting developer and a sensitizer. Said heat-sensitive recording material has a high sensitivity and hardly causes scum adhesion to a thermal head.Type: GrantFiled: February 15, 1991Date of Patent: February 25, 1992Assignee: Mitsubishi Paper Mills LimitedInventor: Takao Kosaka
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Patent number: 5045523Abstract: A heat-sensitive recording material comprising a support, a heat-sensitive coloring layer provided thereon and optionally an undercoat layer provided between these two layers, said heat-sensitive coloring layer and/or said undercoat layer comprising specific, spherical, porous, inorganic particles. The heat-sensitive recording material is excellent in that a sufficient optical density can be obtained when printing is carried out with a low energy, and the fused matters do not substantially adhere to the thermal head when the recording material is printed and the optical density is hardly lowered when printing is carried out with a high energy.Type: GrantFiled: February 6, 1990Date of Patent: September 3, 1991Assignee: Mitsubishi Paper Mills LimitedInventors: Haruyoshi Funae, Tomonori Kiriyama
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Patent number: 5033773Abstract: A document system having improved image security for preventing or reducing the likelihood of successful alteration of information printed on a document includes a detectable substance is released from ruptured microcapsules onto the document in image areas. The substance that penetrates through the document to form a confirming image on the reverse surface. Another detectable substance of lesser penetrating ability simultaneously may be released onto the document in the image areas. Spreading of the first substance outside the boundaries of the image area created by the second substance may produce a halo effect around the image area. Documents as treated by the methods are disclosed, as well as articles comprising a document to be treated in contact with a sheet coated with the detectable substance. The first substance is microencapsulated, the second substance may or may not be microencapsulated.Type: GrantFiled: March 8, 1990Date of Patent: July 23, 1991Assignee: Moore Business FormsInventors: Robert W. Brunea, James M. Raby
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Patent number: 5028580Abstract: A heat sensitive material which is comprised of a support having thereon a transparent heat sensitive layer and at least one layer selected from among a protective layer, a subbing layer and backing layer, wherein at least one of constituent layer contains fine grains of at least one crystalline metal oxide which has a volume resistivity ranging from 10.degree. to 10.sup.5 ohm.multidot.cm. An amount of said crystalline metal oxide is 0.0001 g-1 g per m.sup.2 and the best metal oxide is SnO.sub.2.Type: GrantFiled: October 3, 1988Date of Patent: July 2, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Akihiro Shimomura, Toshimasa Usami
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Patent number: 5017545Abstract: A heat sensitive recording material comprising a substrate and a heat sensitive recording layer thereon incorporating a colorless or light-colored basic dye and a color acceptor reactive with the dye to form a color when contacted therewith, the recording material being characterized in that the material has a heat sensitive recording layer having incorporated therein (1) a heat-fusible substance exhibiting a weight reduction of at least 5% at 200.degree. C. based on the weight at 25.degree. C. under the condition of 20.degree. C./min in the rate of rise of temperature, (2) a wax, (3) a lubricant, and (4) an oil-absorbing pigment at least 85 ml/100 g in oil absorption.Type: GrantFiled: June 1, 1989Date of Patent: May 21, 1991Assignee: Kanzaki Paper Manufacturing Company, LimitedInventors: Nobuo Kanda, Ritsuo Mandoh, Masaharu Nojima, Naoto Arai
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Patent number: 5008231Abstract: Disclosed is a heat-sensitive recording material comprising a support; a heat-sensitive recording layer formed over the support and containing a color forming material, a color developing material which forms a color on contact with the color forming material and a pigment which is about 80 to about 400 ml/100 g in oil absorption according to JIS K 5101 and about 3 to about 15 .mu.m in average particle size; and an overcoat layer formed over the heat-sensitive recording layer and comprising a binder and a pigment, wherein the pigment is used in an amount of about 0.5 to about 3.0 parts by weight per part by weight of the binder and the coating amount of the overcoat layer is about 0.3 to about 2.0 g/m.sup.2 on dry basis.Type: GrantFiled: May 25, 1989Date of Patent: April 16, 1991Assignee: Kanzaki Paper Manufacturing Company LimitedInventors: Katsuaki Yoshizawa, Yoshitaka Oeda
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Patent number: 5002924Abstract: Microencapsulated load bearers to prevent the premature rupture of dye precursor-containing microcapsules are formed concurrently in the same microencapsulation process in which oil/dye precursor-containing microcapsules are formed by emulsifying an oily mixture, containing therein a dye-precursor solution and non-rupturable core particles, as droplets into an aqueous solution. The core particle and oil/dye precursor droplets are then microencapsulated to form a binary microcapsule mixture consisting of microencapsulated load bearers and oil/dye precursor-containing microcapsules, respectively. This binary microcapsule mixture in an appropriate solvent vehicle may be used as a coating for the preparation of carbonless copy paper.Type: GrantFiled: October 5, 1989Date of Patent: March 26, 1991Assignee: The Standard Register CompanyInventor: Michael E. A. Seitz
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Patent number: 4985394Abstract: A thermosensitive recording material is disclosed, which comprises a substrate, a thermosensitive coloring layer comprising a leuco dye and a color developer capable of inducing color formation in the leuco dye, formed on the substrate, and a protective layer comprising at least one inorganic pigment selected from the group consisting of silica and calcium carbonate, each having an average particle diameter of 0.1 .mu.m or less, and a water-soluble binder, formed on the thermosensitive coloring layer.Type: GrantFiled: December 13, 1989Date of Patent: January 15, 1991Assignee: Ricoh Company, Ltd.Inventors: Yasutomo Mori, Norio Kurisu
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Patent number: 4977133Abstract: In a heat sensitive recording material comprising a substrate and a heat sensitive recording layer thereon containing a colorless or light-colored basic dye and a color acceptor which is reactive with the dye to form a color when contacted therewith, the recording material characterized in that an emulsion containing complex particles of colloidal silica and at least one of acrylic polymer and styrene-acrylic polymer is added to a coating composition for the recording layer and/or a coating composition for a protective layer formed on the recording layer.Type: GrantFiled: January 27, 1989Date of Patent: December 11, 1990Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Kouichi Ishida, Mikio Nakamura, Yukio Takayama
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Patent number: 4973571Abstract: There is disclosed a thermosensitive recording material, comprising a support, a thermosensitive recording layer coated on said support and comprising a dye precursor and a color developer capable of developing a color of said dye precursor upon heating, and an porous undercoat layer comprising any one selected from water soluble polymers and latex resins and coated between said support and said thermosensitive recording layer.Type: GrantFiled: September 28, 1989Date of Patent: November 27, 1990Assignee: Mitsubishi Paper Mills LimitedInventors: Naomasa Koike, Atsuo Goto
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Patent number: 4971941Abstract: An imaging sheet used for achieving color balance in a full-color imaging system is disclosed. The sheet is characterized by utilizing three sets of microcapsules, each containing a different colorless image-agent and a photohardenable or photosoftenable composition, and a corrective dye associated with the substrate. Association of the corrective dye with the substrate achieves color balance by equalizing the speed of the different colorless color-forming microcapsules.Type: GrantFiled: May 26, 1988Date of Patent: November 20, 1990Assignee: The Mead CorporationInventors: James A. Dowler, Peter G. Engeldrum, Roger Jerry
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Patent number: 4970192Abstract: Microcapsule-coated paper for use in a pressure-sensitive copying set contains a higher than conventional filler loading, namely 15% to 23%, based on the total weight of the paper. The use of filler loading levels within this range increases the maximum number of legible copies obtainable in a pressure-sensitive copying set.Type: GrantFiled: July 13, 1989Date of Patent: November 13, 1990Assignee: The Wiggins Teape Group LimitedInventors: John B. Cooper, Janet S. Stirling
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Patent number: 4962072Abstract: Record material comprising a paper sheet having on its front a printable pigment coating and on its back isolated droplets of colour former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises a binder for the pigment together with a synthetic reactive sizing agent or a coating structure agent or both the sizing agent and the coating structure agent.Type: GrantFiled: January 13, 1989Date of Patent: October 9, 1990Assignee: The Wiggins Teape Group LimitedInventors: John B. Cooper, Kevin J. Clay
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Patent number: 4956309Abstract: A receiver sheet for producing high density images, preferably in a photosensitive imaging system is disclosed. The receiver sheet is characterized by containing a particulate developer material which does not substantially compress upon the application of pressure. The resistance to pressure is accomplished by using a receiver sheet which has a discontinuous thickness or by incorporating a stilt material into the developer material. Also disclosed is an imaging system which has a discontinuous thickness donor sheet to prevent the developer material from substantially compressing upon the application of pressure.Type: GrantFiled: December 6, 1988Date of Patent: September 11, 1990Assignee: The Mead CorporationInventors: Paul C. Adair, Cheryl L. Moore
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Patent number: 4948772Abstract: Substantially flat surfaced emulsion particles polymerized vinyl monomer, having a concavity in at least one of the flat surfaces, a diameter D of from 0.1 to 5.0 .mu.m, and a particle diameter thickness d ratio (d/D) of 1.2 to 5.0, prepared by the step of (1) aqueous emulsion polymerizing a first vinyl monomer or mixture of monomers (a) to form vinyl polymer seed particles; and (2) aqueous emulsion polymerizing a second vinyl monomer or mixture of monomers (b) in the presence of the vinyl polymer seed particles and a non-aqueous organic solvent having a surface tention to water at 20.degree. C. of 48 dyne/cm or more, in a weight ratio of monomer (a) to monomer (b) of 0.5/99.5 to 50/50; and are useful in high performance recording material, paint compositions and paper coating compositions.Type: GrantFiled: June 30, 1989Date of Patent: August 14, 1990Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Futoshi Hoshino, Makoto Nakano, Takeshi Yanagihara
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Patent number: 4948775Abstract: A heat-sensitive record material has a protective layer on the recording layer which is formed on a base sheet and which comprises a color forming material and a color developing material in the state of that they are contacted by heating to produce color images. The protective layer comprises a water-soluble high polymer and a polyethylene wax having an average particle size of 3 to 10 .mu.m. The protective layer comprising the granular polyethylene wax in an amount of 0.1 to 30 parts by weight per 100 parts by weight of the solid amount of the protective layer improves the property of the heat-sensitive record material, particularly the sliding property and the retainability of recorded images without accompanying either lowering the initial color density of recorded images or sticking.Type: GrantFiled: August 16, 1988Date of Patent: August 14, 1990Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Takuji Tsuji, Tomohiro Yanagida
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Patent number: 4946823Abstract: In a heat-sensitive record material having a heat-sensitive recording layer on a base sheet, a middle layer is formed between the heat-sensitive recording layer and the base sheet by blade-coating on the base sheet a coating composition which mainly comprises at least one pigment having an oil absorption of at least 80 cc/100 g measured by JIS K 5101 and a binder and in which the binder ratio is 5% to 16% by weight of the total solid and the solid amount is 35 to 55% by weight of the coating composition.Type: GrantFiled: February 15, 1989Date of Patent: August 7, 1990Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Mikio Nakamura, Yukio Takayama
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Patent number: 4940688Abstract: A developer sheet having a high light resistivity comprises a layer having an electrophilic developer coated thereon, and a layer having transparent or semitransparent particles containing an ultraviolet-ray absorbent and a process for producing the developer sheet.Type: GrantFiled: December 27, 1988Date of Patent: July 10, 1990Assignee: Brother Kogyo Kabushiki KaishaInventor: Jun Sakai
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Patent number: 4936607Abstract: Methods for preventing or reducing the likelihood of successful alteration of information printed on a document, wherein a detectable substance is released from ruptured microcapsules onto the document in image areas. The substance penetrates through the document to form a confirming image on the reverse surface. Another detectable substance of lesser penetrating ability simultaneously may be released onto the document in the image areas. Spreading of the first substance outside the boundaries of the image area created by the second substance may produce a halo effect around the image area. Documents as treated by the methods are disclosed, as well as articles comprising a document to be treated in contact with a sheet coated with the detectable substance. The first substance is microencapsulated, the second substance may or may not be microencapsulated.Type: GrantFiled: January 27, 1988Date of Patent: June 26, 1990Assignee: Moore Business Forms, Inc.Inventors: Robert W. Brunea, James M. Raby
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Patent number: 4929590Abstract: A thermosensitive recording material is disclosed, which comprises (a) a support, (b) an undercoat layer formed on the support, which comprises spherical hollow particles made of a plastic material having a glass transition temperature ranging from 40.degree. C. to 90.degree. C., the spherical hollow particles having a mean particle diameter of 0.20 .mu.m to 1.5 .mu.m, and a voidage of 40% to 90%, and a binder resin in an effective amount, and (c) a thermosensitive coloring layer formed on the undercoat layer, which comprises as the main components a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto.Type: GrantFiled: March 2, 1989Date of Patent: May 29, 1990Assignee: Ricoh Company, Ltd.Inventors: Keiichi Maruta, Takashi Ueda, Yasuhiko Watanabe
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Patent number: 4927801Abstract: Disclosed is a heat-sensitive recording material useful in the manufacture of thermal paper and thermal labels. The material comprises a cellulosic or other suitable substrate, a thermally imprintable color-producing layer, and a protective layer over the color-producing layer. It may also include a second protective layer and/or a pressure-sensitive adhesive layer, on the surface of the substrate opposite from the color-producing layer, and a releasable liner covering the adhesive layer. The color-producing layer includes a basic, acid-neutralizing agent for both reducing background discoloration during manufacturing and increasing image definition. The protective layer comprises a polymeric binder which is both ionically and covalently cross-linked to provide improved resistance to hydrophobic and hydrophillic solvents.Type: GrantFiled: July 12, 1988Date of Patent: May 22, 1990Assignee: Nashua CorporationInventor: Meftah U. Mahmud
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Patent number: 4925827Abstract: A thermosensitive recording material bearing an undercoat layer comprising fine organic hollow particles having a specific ratio of its wall thickness to its particle diameter provides excellent thermal response and minimizes foreign matters adhered to a thermal head.Type: GrantFiled: May 1, 1989Date of Patent: May 15, 1990Assignee: Mitsubishi Paper Mills Ltd.Inventors: Atsuo Goto, Naomasa Koike