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US4148968A Expired / Lapsed US ⏱️ 0.0 years remaining

Receiving sheet

Assignee: Canon Inc
•
Filing: 1975-03-20
•
Granted: 1979-04-10
•
Expires: 1995-03-20
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Abstract

Abstract An electrophotographic method comprises developing an electric latent image formed on a photosensitive member comprising a photoconductive material and containing a first color forming agent in a surface for forming a visible image with a charged toner particle containing a second color forming agent, and heating to cause a thermal color forming reaction therebetween resulting in formation of a colored fixed image on the photosensitive member and a receiving sheet comprising a color forming agent (B) and a material having a melting point from 40° to 130° C.

Inventors

  • 👤 Shinichiro Nagashima
  • 👤 Kaichi Tsuchiya
  • 👤 Yoshihiro Sakamoto
  • 👤 Hiroshi Yamakami
  • 👤 Seiji Tomari

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 14:27
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0928; G03G5/00; G03G5/12; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31942; Y10T428/31949; Y10T428/31964

Claims Analysis

Total Claims: 44
Claim 1
Independent Claim 189 words
A receiving sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored electrophotographic toner image containing a color forming agent (A), said receiving sheet consisting essentially of: a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40-130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said receiving sheet contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat fixed, colored image.
Claim 2
Dependent Claim 189 words
A receiving sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored electrophotographic toner image containing a color forming agent (A), said receiving sheet consisting essentially of: a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40-130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said receiving sheet contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat fixed, colored image.
Claim 3
Dependent Claim 224 words
An electrostatic recording sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored toner image formed thereon, said recording sheet consisting essentially of: a support; and an electrostatic recording layer for forming an electrostatic latent image which, when treated with a toner containing a color forming agent (A), forms the colorless or light colored toner image, said recording layer consisting essentially of a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40°- 130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid anilide diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said recording layer contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat-fixed, colored image.
Claim 4
Dependent Claim 224 words
An electrostatic recording sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored toner image formed thereon, said recording sheet consisting essentially of: a support; and an electrostatic recording layer for forming an electrostatic latent image which, when treated with a toner containing a color forming agent (A), forms the colorless or light colored toner image, said recording layer consisting essentially of a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40°- 130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid anilide diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said recording layer contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat-fixed, colored image.
Claim 5
Dependent Claim 20 words
The electrostatic recording sheet according to claim 2 in which the phenolic material is a polymer of phenol and aldehyde.
Claim 6
Dependent Claim 19 words
The electrostatic recording sheet of claim 2 in which the phenolic material is a polymer of phenol and acetylene.
Claim 7
Dependent Claim 22 words
The electrostatic recording sheet of claim 2 in which the phenolic material is a bisphenol compound containing carboxyl radical in the molecule.
Claim 8
Dependent Claim 25 words
The electrostatic recording sheet of claim 2 in which the phenolic material is a polymer of a bisphenol compound containing carboxyl radical in the molecule.
Claim 9
Dependent Claim 18 words
The electrostatic recording sheet of claim 2 in which the fatty acid amide is a fatty acid anilide.
Claim 10
Dependent Claim 50 words
An electrostatic recording sheet according to claim 2 in which the phenolic material is selected from the group consisting of 4-t-bytylphenol, 4-β-t-amylphenol, 4-phenylphenol, 4,4'-isopropylidene-bis-(2-chlorophenol), 4,4'-isopropylidenebis-(2-methylphenol), 4,4'-isopropylidene-bis-(2-t-butylphenol), 4,4'-sec-butylidene-bis-(2-methylphenol), 2,2'-dihydroxydiphenyl, 4-t-octyl catechol, 4-hydroxyacetophenone, methyl-4-hydroxybenzoate, 4-hydroxydiphenoxide, α-naphthol, β-naphthol, 4-hydroxy diphenyloxide, 2,2'-methylene-bis-(4-chlorophenol), 2,2'-methylene-bis(4-methyl-6-t-butylphenol), 4,4'-isopropylidene bis-(2,6-dibromophenol), 4,4'-isopropylidene bis-(2,6-dichlorophenol), 4,4'-isopropylidene bis-(2,6-dimethylphenol), 4,4'-cyclohexylidene diphenol, and 4,4'-cyclohexylidene bis-(2-methylphenol).
Claim 11
Dependent Claim 33 words
An electrostatic recording sheet according to claim 2 in which the phenolic material is a bisphenol compound containing carboxyl radical in a molecule and its polymer selected from the group consisting of: ##STR7##
Claim 12
Dependent Claim 29 words
An electrostatic recording sheet according to claim 2 in which the fatty acid has not less than 12 carbon atoms and melting point ranging from 40 to 100° C.
Claim 13
Dependent Claim 53 words
An electrostatic recording sheet according to claim 2 in which the fatty acid is selected from the group consisting of lauric acid, tridecylic acid, myristic acid, pentadecylic acid, palmitic acid, heptadecylic acid, stearic acid, nonadecanoic acid, arachic acid, behenic acid, lignoceric acid, cerotic acid, heptacosanoic acid, montanic acid, melissic acid and lacceric acid.
Claim 14
Dependent Claim 35 words
An electrostatic recording sheet according to claim 2 in which the metal of the fatty acid metal salt is selected from the group consisting of Be, Mg, Ba, Zn, Cd, Hg, Al, Tl, and Pb.
Claim 15
Dependent Claim 30 words
An electrostatic recording sheet according to claim 2 in which the fatty acid amide is selected from the group consisting of fatty acid methyl amide and fatty acid dodecyl amide.
Claim 16
Dependent Claim 35 words
An electrostatic recording sheet according to claim 2 in which the fatty acid ester is selected from the group consisting of methyl ester, ethyl ester, phenyl ester, glycol ester, and glycerine ester of fatty acid.
Claim 17
Dependent Claim 221 words
An electrophotographic recording sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored toner image formed thereon, said recording sheet consisting essentially of: a support; and an electrophotoconductive layer for forming an electrophotographic latent image which, when treated with a toner containing a color forming agent (A), forms the colorless or light colored toner image, said layer consisting essentially of a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl metal ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40°-130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said receiving sheet contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat-fixed, colored image.
Claim 18
Dependent Claim 221 words
An electrophotographic recording sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored toner image formed thereon, said recording sheet consisting essentially of: a support; and an electrophotoconductive layer for forming an electrophotographic latent image which, when treated with a toner containing a color forming agent (A), forms the colorless or light colored toner image, said layer consisting essentially of a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl metal ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40°-130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said receiving sheet contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat-fixed, colored image.
Claim 19
Dependent Claim 50 words
An electrophotographic recording sheet according to claim 15 in which the phenolic material is selected from the group consisting of 4-t-butylphenol, 4-β-t-amylphenol, 4-phenylphenol, 4,4'-isopropylidene-bis-(2-chlorophenol), 4,4'-isopropylidene-bis-(2-methylphenol), 4,4'-isopropylidene-bis-(2-t-butylphenol), 4,4'-sec-butylidene-bis-(2-methylphenol), 2,2'-dihydroxydiphenyl, 4-t-octyl catechol, 4-hydroxyacetophenone, methyl-4-hydroxybenzoate, 4-hydroxydiphenoxide, α-naphthol, β-naphthol, 4-hydroxy diphenyloxide, 2,2'-methylene-bis-(4-chlorophenol), 2,2'-methylene-bis-(4-methyl-6-t-butylphenol), 4,4'-isopropylidene bis-(2,6-dibromophenol), 4,4'-isopropylidene bis-(2,6-dichlorophenol), 4,4'-isopropylidene bis-(2,6-dimethylphenol), 4,4'-cyclohexylidene diphenol, and 4,4'-cyclohexylidene bis-(2-methylphenol).
Claim 20
Dependent Claim 33 words
An electrophotographic recording sheet according to claim 15 in which the phenolic material is a bisphenol compound containing carboxyl radical in a molecule and its polymer selected from the group consisting of: ##STR8##
Claim 21
Dependent Claim 31 words
An electrophotographic recording sheet according to claim 15 in which the fatty acid has not less than 12 carbon atoms and has a melting point ranging from 40° to 100° C.
Claim 22
Dependent Claim 53 words
An electrophotographic recording paper according to claim 15 in which the fatty acid is selected from the group consisting of lauric acid, tridecylic acid, myristic acid, pentadecyclic acid, palmitic acid, heptadecylic acid, stearic acid, nonadecanoic acid, arachic acid, behenic acid, lignoceric acid, cerotic acid, heptacosanoic acid, montanic acid, melissic acid and lacceric acid.
Claim 23
Dependent Claim 35 words
An electrophotographic recording sheet according to claim 15 in which the metal of the fatty acid metal salt is selected from the group consisting of Be, Mg, Ba, Zn, Cd, Hg, Al, Tl, and Pb.
Claim 24
Dependent Claim 30 words
An electrophotographic recording sheet according to claim 15 in which the fatty acid amide is selected from the group consisting of fatty acid methyl amide and fatty acid dodecyl amide.
Claim 25
Dependent Claim 34 words
An electrophotographic recording sheet according to claim 15 in which the fatty acid ester is selected from the group consisting of methylester, ethyl ester, phenyl ester, glycol ester, and glycerine ester of fatty acid.
Claim 26
Dependent Claim 191 words
A receiving sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored electrophotographic toner image containing a color forming agent (A), said receiving sheet consisting essentially of: a binder; a color forming agent (B) selected from the group consisting of, rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxyl polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40° 130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethy isophthalate; wherein said receiving sheet contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat-fixed, colored image.
Claim 27
Dependent Claim 191 words
A receiving sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored electrophotographic toner image containing a color forming agent (A), said receiving sheet consisting essentially of: a binder; a color forming agent (B) selected from the group consisting of, rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxyl polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40° 130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethy isophthalate; wherein said receiving sheet contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat-fixed, colored image.
Claim 28
Dependent Claim 21 words
The toner image receiving sheet according to claim 23 in which the phenolic material is a polymer of phenol and aldehyde.
Claim 29
Dependent Claim 21 words
The toner image receiving sheet according to claim 23 in which the phenolic material is a polymer of phenol and acetylene.
Claim 30
Dependent Claim 24 words
The toner image receiving sheet according to claim 23 in which the phenolic material is a bisphenol compound containing carboxyl radical in the molecule.
Claim 31
Dependent Claim 27 words
The toner image receiving sheet according to claim 23 in which the phenolic material is a polymer of a bisphenol compound containing carboxyl radical in the molecule.
Claim 32
Dependent Claim 20 words
The toner image receiving sheet according to claim 23 in which the fatty acid amide is a fatty acid anilide.
Claim 33
Dependent Claim 45 words
A receiving sheet according to claim 23 in which the phenolic material is selected from the group consisting of 4-t-butylphenol, 4-β-t-amylphenol, 4-phenylphenol, 4,4'-isopropylidene-bis-(2-chlorophenol), 4,4'-isopropylidene-bis-(2-methylphenol), 4,4'-isopropylidene-bis-(2-t-butylphenol), 4,4'-sec-butylidene-bis-(2-methylphenol), 2,2'-dihydroxydiphenyl, 4-t-octyl catechol, 4-hydroxyacetophenone, methyl-4-hydroxybenzoate, 4-hydroxydiphenoxide, α-naphthol, β-naphthol, 4-hydroxydiphenyloxide, 2,2'-methylene-bis-(4-chlorophenol), 2,2'-methylene-bis-(4-methyl-6-t-butylphenol), 4,4'-isopropylidene-bis-(2,6-dibromophenol), 4,4'-isopropylidene-bis-(2,6-dichlorophenol), 4,4'-isopropylidene-bis-(2,6-dimethylphenol), 4,4'-cyclohexylidene diphenol, and 4,4'-cyclohexylidine bis-(2-methylphenol).
Claim 34
Dependent Claim 32 words
A receiving sheet according to claim 23 in which the phenolic material is a bisphenol compound containing carboxyl radical in a molecule and its polymer selected from the group consisting of: ##STR9##
Claim 35
Dependent Claim 28 words
A receiving sheet according to claim 23 in which the fatty acid has 12 or more carbon atoms and a melting point ranging from 40° to 100° C.
Claim 36
Dependent Claim 52 words
A receiving sheet according to claim 23 in which the fatty acid is selected from the group consisting of lauric acid, tridecylic acid, myristic acid, pentadecylic acid, palmitic acid, heptadecylic acid, stearic acid, nonadecanoic acid, arachic acid, behenic acid, lignoceric acid, cerotic acid, heptacosanoic acid, montanic acid, melissic acid and lacceric acid.
Claim 37
Dependent Claim 34 words
A receiving sheet according to claim 23 in which the metal of the fatty acid metal salt is selected from the group consisting of Be, Mg,. Ba, Zn, Cd, Hg, Al, T1, and Pb.
Claim 38
Dependent Claim 29 words
A receiving sheet according to claim 23 in which the fatty acid amide is selected from the group consisting of fatty acid methyl amide and fatty acid dodecyl amide.
Claim 39
Dependent Claim 35 words
A receiving sheet according to claim 23 in which the fatty acid ester is selected from the group consisting of methyl ester, ethyl ester, phenyl ester, glycol ester and glycerine ester of the fatty acid.
Claim 40
Dependent Claim 31 words
A receiving sheet according to claim 23 in which the binder is selected from the group consisting of styrene-butadiene latex, polyvinyl pyrrolidone, acryl latex, polyvinyl alcohol, polyvinyl acetate and polyvinyl butyral.
Claim 41
Dependent Claim 226 words
An electrostatic recording sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored toner image formed thereon, said recording sheet consisting essentially of: a support; and an electrostatic recording layer for forming an electrostatic latent image which, when treated with a toner containing a color forming agent (A), forms the colorless or light colored toner image, said recording layer consisting essentially of a resin binder, a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40°-130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said recording layer contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat-fixed, colored image.
Claim 42
Dependent Claim 226 words
An electrostatic recording sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored toner image formed thereon, said recording sheet consisting essentially of: a support; and an electrostatic recording layer for forming an electrostatic latent image which, when treated with a toner containing a color forming agent (A), forms the colorless or light colored toner image, said recording layer consisting essentially of a resin binder, a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40°-130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said recording layer contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to produce said low-temperature, heat-fixed, colored image.
Claim 43
Dependent Claim 224 words
An electrophotographic recording sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored toner image formed thereon, said recording sheet consisting essentially of: a support; and an electrophotoconductive layer for forming an electrophotographic latent image which, when treated with a toner containing a color forming agent (A), forms the colorless or light colored toner image, said layer consisting essentially of: a resin binder; a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40°-130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said receiving sheet contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to product said low-temperature, heat-fixed, colored image.
Claim 44
Dependent Claim 224 words
An electrophotographic recording sheet for producing a low-temperature, heat-fixed, colored image from a colorless or light colored toner image formed thereon, said recording sheet consisting essentially of: a support; and an electrophotoconductive layer for forming an electrophotographic latent image which, when treated with a toner containing a color forming agent (A), forms the colorless or light colored toner image, said layer consisting essentially of: a resin binder; a color forming agent (B) selected from the group consisting of rosin modified maleic acid resin, hydrolyzed product of copolymer of styrene and maleic anhydride, hydrolyzed product of polymer of carboxy polyethylene, hydrolyzed product of copolymer of vinyl methyl ether and maleic anhydride, hydrolyzed product of copolymer of ethylene and maleic anhydride, Japanese acid clay, bentonite, diatomaceous earth, and phenolic material; and a material having a melting point ranging from 40°-130° C. selected from the group consisting of fatty acid, fatty acid metal salt, fatty acid ester, fatty acid amide, diphenyl phthalate, dicyclohexyl phthalate, ethylene glycol dibenzoate and dimethyl isophthalate; wherein said receiving sheet contains 10-30 parts of said material having a melting point ranging from 40°-130° C. per 50 parts of said color forming agent (B); and wherein said color forming agent (B) is adapted to react with the color forming agent (A) in the toner image upon heating to product said low-temperature, heat-fixed, colored image.

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-04-09 1982-10-09 1983-04-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-04-09 1986-10-09 1987-04-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-04-09 1990-10-09 1991-04-10 $7700.00 Window Closed / Lapsed

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