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US 2003/0113645 A1Published application
Coating liquid for electrophotographic photoreceptor, electrophotographic photoreceptor, and image forming method and apparatus using the photoreceptor
AssigneeRicoh Company, Ltd.
InventorYasuo Suzuki
Life of this patent
Estimating the term…
Abstract
A photoreceptor including an electroconductive substrate; an undercoat layer located overlying the electroconductive substrate and including titanium oxide which has an average particle diameter greater than 0.05 μm and less than 0.20 μm and which includes rutile titanium oxide in an amount of from 10 to 100% by weight based on total weight of the titanium oxide; and a photosensitive layer located overlying the undercoat layer.
Claims23
A coating liquid comprising:
- a binder resin;
- titanium oxide;
- and
- an organic solvent,
- wherein the titanium oxide comprises rutile titanium oxide in an amount of from 10 to 100% by weight based on total weight of the titanium oxide, and wherein said titanium oxide is dispersed in the binder resin and organic solvent, and has an average particle diameter greater than 0.05 μm and less than 0.20 μm.
2 more elements
A photoreceptor comprising:
- an electroconductive substrate;
- an undercoat layer located overlying the electroconductive substrate and comprising titanium oxide, said titanium oxide having an average particle diameter greater than 0.05 μm and less than 0.20 μm and comprising rutile titanium oxide in an amount of from 10 to 100% by weight based on total weight of the titanium oxide;
- and
- a photosensitive layer overlying the undercoat layer.
1 more element
An electrophotographic image forming method comprising:
- charging a photoreceptor;
- irradiating the photoreceptor with imagewise light to form an electrostatic latent image on the photoreceptor using a light source selected from the group consisting of laser diodes and light emitting diodes;
- developing the electrostatic latent image with a developer including a toner to form a toner image on the photoreceptor using a reverse development method;
- and
- transferring the toner image onto a receiving material,
- wherein the photoreceptor comprises:
- an electroconductive substrate;
- an undercoat layer located overlying the electroconductive substrate and comprising titanium oxide, said titanium oxide having an average particle diameter greater than 0.05 μm and less than 0.20 μm and comprising rutile titanium oxide in an amount of from 10 to 100% by weight based on total weight of the titanium oxide;
- and
- a photosensitive layer overlying the undercoat layer.
7 more elements
An electrophotographic image forming apparatus comprising:
- a photoreceptor;
- a charger configured to charge the photoreceptor;
- an image irradiator configured to irradiate the photoreceptor with imagewise light to form an electrostatic latent image on the photoreceptor;
- an image developer configured to develop the electrostatic latent image with a developer including a toner to form a toner image on the photoreceptor;
- an image transfer device configured to transfer the toner image onto a receiving material;
- and
- a discharger configured to reducing a charge remaining on the photoreceptor,
- wherein the photoreceptor comprises:
- an electroconductive substrate;
- an undercoat layer located overlying the electroconductive substrate and comprising titanium oxide, said titanium oxide having an average particle diameter greater than 0.05 μm and less than 0.20 μm and comprising rutile titanium oxide in an amount of from 10 to 100% by weight based on total weight of the titanium oxide;
- and
- a photosensitive layer overlying the undercoat layer.
9 more elements
A process cartridge comprising:
- a photoreceptor;
- and
- at least one of a) a charger configured to charge the photoreceptor;
- b) an image irradiator configured to irradiate the photoreceptor with imagewise light to form an electrostatic latent image on the photoreceptor;
- c) an image developer configured to develop the electrostatic latent image with a developer including a toner to form a toner image on the photoreceptor;
- d) an image transfer device configured to transfer the toner image onto a receiving material;
- and
- e) a discharger configured to reducing a charge remaining on the photoreceptor,
- wherein the photoreceptor comprises:
- an electroconductive substrate;
- an undercoat layer located overlying the electroconductive substrate and comprising titanium oxide, said titanium oxide having an average particle diameter greater than 0.05 μm and less than 0.20 μm and comprising rutile titanium oxide in an amount of from 10 to 100% by weight based on total weight of the titanium oxide;
- and
- a photosensitive layer overlying the undercoat layer.
10 more elements
A method for manufacturing a photoreceptor comprising:
- coating an undercoat layer coating liquid on an electroconductive substrate to form an undercoat layer on the electroconductive substrate;
- and
- coating a photosensitive layer coating liquid comprising a charge generation material and a charge transport material to form a photosensitive layer overlying the undercoat layer,
- wherein the undercoat layer coating liquid comprises:
- a binder resin;
- titanium oxide;
- and
- an organic solvent,
- wherein the titanium oxide comprises rutile titanium oxide in an amount of from 10 to 100% by weight based on total weight of the titanium oxide, and wherein said titanium oxide is dispersed in the binder resin and organic solvent, and has an average particle diameter greater than 0.05 μm and less than 0.20 μm.
6 more elements
Dependencies are inferred from the claim text.