Country
Full text data for US and EP
Status
Type
Filing Date
Publication Date
Inventor
Assignee
Click to expand
IPC
No.
Publication Number
Title
Publication/Patent Number Publication/Patent Number
Publication date Publication date
Application number Application number
Filing date Filing date
Inventor Inventor
Assignee Assignee
IPC IPC
1
US10353305B2
Publication/Patent Number: US10353305B2
Publication date: 2019-07-16
Application number: 15/699,440
Filing date: 2017-09-08
Inventor: Ando, Akira  
Abstract: An electrophotographic photoreceptor comprising at least a photosensitive layer on a conductive substrate, wherein the photosensitive layer is a laminate having a charge transport layer and a charge generation layer, the charge transport layer contains four or more types of compounds each having a maximum absorption wavelength falling within a wavelength range of from 300 nm to 600 nm in a tetrahydrofuran solution at 25° C., and maximum absorption wavelengths falling within the wavelength range of at least four types of the compounds of said four or more types of the compounds are separated from each other by 10 nm or more. An electrophotographic photoreceptor comprising at least a photosensitive layer on a conductive substrate, wherein the photosensitive layer is a laminate having a charge transport layer and a charge generation layer, the charge transport layer contains four or more types of ...more ...less
2
US10331051B2
Publication/Patent Number: US10331051B2
Publication date: 2019-06-25
Application number: 15/898,687
Filing date: 2018-02-19
Abstract: A charge transport molecule containing four radical polymerizable functional groups used in an overcoat for an organic photoconductor drum of an electrophotographic image forming device is provided. The charge transport molecule containing four radical polymerizable functional groups of the general structure exemplified below: where R1 and R2 contain a spacer group and a radical polymerizable functional group, R3 and R4 are selected from the group consisting of a radical polymerizable functional group, a non-radical polymerizable functional group, and one each of a radical polymerizable functional group and a non-radial polymerizable functional group, and R5 and R6 contain a spacer group and a radical polymerizable functional group. A charge transport molecule containing four radical polymerizable functional groups used in an overcoat for an organic photoconductor drum of an electrophotographic image forming device is provided. The charge transport molecule containing four radical polymerizable functional ...more ...less
3
US10394144B2
Publication/Patent Number: US10394144B2
Publication date: 2019-08-27
Application number: 15/891,955
Filing date: 2018-02-08
Abstract: An electrophotographic photosensitive body includes at least a photosensitive layer and a protective layer sequentially laminated on an electroconductive support, wherein the protective layer has a domain containing perfluoropolyether.
4
US10185237B2
Publication/Patent Number: US10185237B2
Publication date: 2019-01-22
Application number: 14/992,603
Filing date: 2016-01-11
Abstract: An electrophotographic photoreceptor comprises a conductive support and, at least a photosensitive layer on the conductive support, wherein the photosensitive layer includes a polyarylate resin and the polyarylate resin has a repeating structure represented by formula (1), and the amount of bisphenol residues represented by formula (3) after the polyarylate resin is hydrolyzed, is 0.2% to 1%, in terms of intensity ratio, based on the total amount of bisphenol residues represented by formula (2) and formula (3) after the polyarylate resin is hydrolyzed, the bisphenol residues being detected with a gas chromatograph employing a hydrogen flame ionization detector (FID). An electrophotographic photoreceptor comprises a conductive support and, at least a photosensitive layer on the conductive support, wherein the photosensitive layer includes a polyarylate resin and the polyarylate resin has a repeating structure represented by formula (1), and ...more ...less
5
US10203616B2
Publication/Patent Number: US10203616B2
Publication date: 2019-02-12
Application number: 15/622,843
Filing date: 2017-06-14
Abstract: The present invention relates to an electrophotographic photoreceptor comprising: a conductive support; and a photosensitive layer on the conductive support, wherein the photosensitive layer contains a charge transport substance, a binder resin, and a compound which has a molecular weight of equal to or less than 350, and is represented by General Formula (1). The present invention relates to an electrophotographic photoreceptor comprising: a conductive support; and a photosensitive layer on the conductive support, wherein the photosensitive layer contains a charge transport substance, a binder resin, and a compound which has a ...more ...less
6
US10310395B2
Publication/Patent Number: US10310395B2
Publication date: 2019-06-04
Application number: 16/002,421
Filing date: 2018-06-07
Abstract: Provided are an electrophotographic photosensitive member capable of satisfying abrasion resistance and electrical properties and suppressing image deletion, and an electrophotographic apparatus and a process cartridge having the electrophotographic photosensitive member. A surface layer of the electrophotographic photosensitive member contains a polymer of a hole transport material having a polymerizable functional group, wherein the hole transport material has a specific structure. Provided are an electrophotographic photosensitive member capable of satisfying abrasion resistance and electrical properties and suppressing image deletion, and an electrophotographic apparatus and a process cartridge having the electrophotographic photosensitive member. A ...more ...less
7
US10316397B2
Publication/Patent Number: US10316397B2
Publication date: 2019-06-11
Application number: 15/230,608
Filing date: 2016-08-08
Abstract: A method of preparing a cylindrical metal member includes preparing a metallic ingot having at least one surface having a mean width with respect to roughness Sm in a range of from 100 μm to 220 μm; imparting a lubricant to the at least one surface of the metallic ingot; and subjecting the metallic ingot to impact pressing while the surface coated with the lubricant with respect to the metallic ingot is set as a bottom surface, to thereby mold a cylindrical metal member. A method of preparing a cylindrical metal member includes preparing a metallic ingot having at least one surface having a mean width with respect to roughness Sm in a range of from 100 μm to 220 μm; imparting a lubricant to the at least one surface of the metallic ...more ...less
8
US10359713B2
Publication/Patent Number: US10359713B2
Publication date: 2019-07-23
Application number: 15/948,825
Filing date: 2018-04-09
Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer having a single-layer structure. The photosensitive layer contains a charge generating material, an electron transport material, and a binder resin. The electron transport material includes a compound having a halogen atom and represented by a general formula (1), (2), (3), (4), or (5). The binder resin includes a polyarylate resin. The polyarylate resin includes at least one type of repeating unit each represented by general formula (11), at least one type of repeating unit each represented by general formula (12), and a terminal group represented by general formula (13). In general formula (13), Rf represents a chain aliphatic group substituted by at least one fluoro group. A charge of calcium carbonate charged by friction between the photosensitive layer and the calcium carbonate is at least +8.0 μC/g. An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer having a single-layer structure. The photosensitive layer contains a charge generating material, an electron transport material, and a binder resin. The electron transport ...more ...less
9
US2019163078A1
Publication/Patent Number: US2019163078A1
Publication date: 2019-05-30
Application number: 16/201,713
Filing date: 2018-11-27
Abstract: An electrophotographic photosensitive member includes a support member, an electroconductive layer, and a photosensitive layer, in this order. The electroconductive layer contains a binder resin, electrically conductive first metal oxide particles, and second metal oxide particles. The refractive index Rb of the binder resin, the refractive index Rc of the first metal oxide particles, and the refractive index Rh of the second metal oxide particles satisfy the relationships: |Rb−Rc|≤0.35 and |Rb−Rh|≥0.65. The electroconductive layer has a volume resistivity of 1.0×106 Ω·cm to 1.0×1013 Ω·cm, and the ratio of the specific gravity of the first metal oxide particles to the specific gravity of the second metal oxide particles is 0.85 to 1.20. An electrophotographic photosensitive member includes a support member, an electroconductive layer, and a photosensitive layer, in this order. The electroconductive layer contains a binder resin, electrically conductive first metal oxide particles, and second metal oxide ...more ...less
10
US2019163120A1
Publication/Patent Number: US2019163120A1
Publication date: 2019-05-30
Application number: 16/198,105
Filing date: 2018-11-21
Abstract: A process cartridge configured to be detachably attachable to a main body of an electrophotographic image forming apparatus, in which an occurrence of an image failure is suppressed, wherein the process cartridge includes an electrophotographic photosensitive member and a cleaning member arranged in contact with the electrophotographic photosensitive member, wherein an elastic deformation modulus of a surface layer of the electrophotographic photosensitive member is 35% or larger, and the cleaning member is formed of a urethane foam, wherein a density of the urethane foam is 200 to 500 kg/cm3, and a 25% compressive load of the urethane foam is 0.3 MPa or smaller. A process cartridge configured to be detachably attachable to a main body of an electrophotographic image forming apparatus, in which an occurrence of an image failure is suppressed, wherein the process cartridge includes an electrophotographic photosensitive member and a ...more ...less
11
US2019271923A1
Publication/Patent Number: US2019271923A1
Publication date: 2019-09-05
Application number: 16/414,104
Filing date: 2019-05-16
Abstract: An overcoat layer for an organic photoconductor drum includes a curable composition having about 20 to about 80 percent by weight of a charge transport molecule containing four radical polymerizable functional groups as exemplified below: where R1 and R2 contain a spacer group and a radical polymerizable functional group, R3 and R4 are hydrogen atoms, and R5 and R6 contain a spacer group and a radical polymerizable functional group. The curable composition may also include a non-radical polymerizable additive, such as a surfactant, and/or a curing agent. An overcoat layer for an organic photoconductor drum includes a curable composition having about 20 to about 80 percent by weight of a charge transport molecule containing four radical polymerizable functional groups as exemplified below: where R1 and R2 contain a ...more ...less
12
US2019113879A1
Publication/Patent Number: US2019113879A1
Publication date: 2019-04-18
Application number: 16/155,126
Filing date: 2018-10-09
Abstract: There is provided an electrophotographic photosensitive member having a cylindrical shape, including a plurality of concave portions on a surface thereof, wherein a sum of opening areas of the concave portions is 5% or more and 65% or less based on a total area of a surface layer of the electrophotographic photosensitive member, an average value davg of depths of the concave portions satisfies the following Equation (1), 0.4≤davg≤3.0 (μm)  Equation (1) a sum of opening areas of concave portions having a specific depth d is 95% or more of the sum of the opening areas of the concave portions, an average value Lavg of maximum widths of openings of the concave portions in a circumferential direction of the electrophotographic photosensitive member is 20 μm or more and 200 μm or less, and the electrophotographic photosensitive member has at least one specific region B. There is provided an electrophotographic photosensitive member having a cylindrical shape, including a plurality of concave portions on a surface thereof, wherein a sum of opening areas of the concave portions is 5% or more and 65% or less based on a total ...more ...less
13
US2019004442A1
Publication/Patent Number: US2019004442A1
Publication date: 2019-01-03
Application number: 16/007,871
Filing date: 2018-06-13
Abstract: An electrophotographic photosensitive member includes an electroconductive support member and a photosensitive layer. The uppermost layer of the electrophotographic photosensitive member defines a surface layer, and the surface layer contains polytetrafluoroethylene particles, a charge transporting material, and polyvinyl acetal. The proportion of the polyvinyl acetal content to the polytetrafluoroethylene particles content in the surface layer is in the range of 0.1% by mass to 15.0% by mass, and the charge transporting material content in the surface layer is 35% by mass or more relative to the total mass of the surface layer. An electrophotographic photosensitive member includes an electroconductive support member and a photosensitive layer. The uppermost layer of the electrophotographic photosensitive member defines a surface layer, and the surface layer contains polytetrafluoroethylene particles, a ...more ...less
14
EP3451064A1
Publication/Patent Number: EP3451064A1
Publication date: 2019-03-06
Application number: 17789127.2
Filing date: 2017-03-17
Abstract: An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer containing at least a charge generating material, an electron transport material, a hole transport material, and a binder resin. The electron transport material includes a naphthoquinone derivative represented by general formula (1). An amount of triboelectric charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer (3) is at least +7 µC/g. In general formula (1), R11 and R12 are respectively the same as R11 and R12 described in the description. An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer containing at least a charge generating material, an electron transport material, a hole ...more ...less
15
EP2816412B1
Publication/Patent Number: EP2816412B1
Publication date: 2019-08-14
Application number: 14002090.0
Filing date: 2014-06-17
16
US10409179B1
Publication/Patent Number: US10409179B1
Publication date: 2019-09-10
Application number: 16/053,819
Filing date: 2018-08-03
Abstract: An electrophotographic photoreceptor includes a conductive support, a charge generation layer disposed on the conductive support, and a charge transport layer disposed on the charge generation layer. The charge generation layer includes a charge generating material and a vinyl copolymer. The vinyl copolymer includes a structural unit including a chlorine atom, a structural unit including an acyloxy group, and a structural unit including two or more carboxyl groups. The proportion of the structural unit including an acyloxy group to all of the structural units is 13.4 mol % or more and 20.0 mol % or less. The charge transport layer includes a charge transporting material and a binder resin. An electrophotographic photoreceptor includes a conductive support, a charge generation layer disposed on the conductive support, and a charge transport layer disposed on the charge generation layer. The charge generation layer includes a charge generating material and a vinyl ...more ...less
17
US2019302632A1
Publication/Patent Number: US2019302632A1
Publication date: 2019-10-03
Application number: 16/048,531
Filing date: 2018-07-30
Abstract: Provided is an electrophotographic photoreceptor including: a conductive substrate; a single-layer type photosensitive layer that is provided on the conductive substrate; an inorganic protective layer that is provided on the single-layer type photosensitive layer; wherein layers that are interposed between the conductive substrate and the inorganic protective layer have a total thickness of 10 μm to 25 μm. Provided is an electrophotographic photoreceptor including: a conductive substrate; a single-layer type photosensitive layer that is provided on the conductive substrate; an inorganic protective layer that is provided on the single-layer type photosensitive layer; wherein layers ...more ...less
18
US10416581B2
Publication/Patent Number: US10416581B2
Publication date: 2019-09-17
Application number: 15/667,715
Filing date: 2017-08-03
Abstract: An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member including a support, a charge generation layer, a charge transport layer containing a charge transporting material, and a protective layer, in the order presented, wherein the charge transport layer contains a polycarbonate resin having a structure selected from a group A and a structure selected from a group B, and the protective layer includes a cured material of a composition containing a compound having at least a functional group selected from chain-polymerizable functional groups and sequential polymerizable functional groups. An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member ...more ...less
19
US10452021B2
Publication/Patent Number: US10452021B2
Publication date: 2019-10-22
Application number: 16/198,105
Filing date: 2018-11-21
Abstract: A process cartridge configured to be detachably attachable to a main body of an electrophotographic image forming apparatus, in which an occurrence of an image failure is suppressed, wherein the process cartridge includes an electrophotographic photosensitive member and a cleaning member arranged in contact with the electrophotographic photosensitive member, wherein an elastic deformation modulus of a surface layer of the electrophotographic photosensitive member is 35% or larger, and the cleaning member is formed of a urethane foam, wherein a density of the urethane foam is 200 to 500 kg/cm3, and a 25% compressive load of the urethane foam is 0.3 MPa or smaller. A process cartridge configured to be detachably attachable to a main body of an electrophotographic image forming apparatus, in which an occurrence of an image failure is suppressed, wherein the process cartridge includes an electrophotographic photosensitive member and a ...more ...less
20
US10451984B2
Publication/Patent Number: US10451984B2
Publication date: 2019-10-22
Application number: 15/969,836
Filing date: 2018-05-03
Abstract: A coating film of a coating liquid for a surface layer, the coating liquid containing a hole transporting compound having a chain-polymerizable functional group and a compound having a specified structure, is cured to thereby form a surface layer of an electrophotographic photosensitive member. A coating film of a coating liquid for a surface layer, the coating liquid containing a hole transporting compound having a chain-polymerizable functional group and a compound having a specified structure, is cured to thereby form a surface layer of an electrophotographic ...more ...less