Charging members
AssigneeHewlett-Packard Development Company, L.P.
InventorsTaehyun Kim, Ara Kim, Yunhyung Bae, Se Young Yoon, Youngphil Ji, Yong-Sang Ryu
Life of this patent
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Abstract
An example charging member has a conductive support; a conductive elastic body layer on the conductive support; and a surface layer on the conductive elastic body layer, wherein the surface layer includes a binder resin and particles, wherein the surface layer includes a first portion of the binder resin having the particles and a second portion of the binder resin having an absence of the particles, and wherein the second portion has a peak height (Spk)/core roughness depth (Sk) of less than 0.2.
Claims14
A charging member, comprising:
- a conductive support;
- a conductive elastic body layer on the conductive support;
- and
- a surface layer on the conductive elastic body layer, wherein the surface layer consists of a binder resin, particles having an average particle size of from 21 microns to about 35 microns, and optionally a conducting agent, and wherein the surface layer includes a first portion of the binder resin having the particles and a second portion of the binder resin having an absence of the particles, and wherein the second portion has a peak height (Spk)/core roughness depth (Sk) of less than 0.2.
A cartridge for an electrophotographic imaging apparatus, the cartridge comprising:
- a conductive support;
- a conductive elastic body layer on the conductive support;
- and
- a surface layer on the conductive elastic body layer, wherein the surface layer consists of a binder resin, particles having an average particle size of from 21 microns to about 35 microns, and optionally a conducting agent, wherein the surface layer includes a first portion of the binder resin having the particles disposed in the binder resin and a second portion of the binder resin having an absence of the particles disposed in the binder resin, and wherein a peak height (Spk)/core roughness depth (Sk) of the first portion/a Spk/Sk of the second portion is>10.
An electrophotographic imaging apparatus, comprising:
- an electrophotographic photoconductor;
- and
- a charging member to contact the electrophotographic photoconductor to charge the electrophotographic photoconductor, the charging member comprising:
- a conductive support;
- a conductive elastic body layer on the conductive support;
- and
- a surface layer on the conductive elastic body layer, the surface layer consisting of a binder resin, particles having an average particle size of from 21 microns to about 35 microns, and optionally a conducting agent, wherein the surface layer has a first portion including the particles and a second portion with an absence of the particles, and wherein:
- a reduced peak height (Spk)/core roughness depth (Sk) of the first portion/a Spk/Sk of the second portion is >10;
- and
- the second portion has a Spk/Sk of less than 0.2.
Dependencies are inferred from the claim text.