Electrophotographic photosensitive member, and electrophotographic apparatus, device unit and facsimile machine having the photosensitive member
AssigneeCanon Kabushiki Kaisha
InventorYoshio Kashizaki
Life of this patent
Estimating the term…
Abstract
An electrophotographic photosensitive member is disclosed which has a photosensitive layer on a conductive support. The photosensitive layer contains an azo pigment of Formula (1): Ar--(--N.dbd.N--Cp).sub.n. Also, disclosed are an electrophotographic apparatus, a device unit, and a facsimile machine using the electrophotographic photosensitive member.
Claims11
An electrophotographic photosensitive member comprising a conductive support and a photosensitive layer provided thereon, wherein said photosensitive layer contains an azo pigment represented by the following Formula (1), ##STR91## wherein Ar represents a substituted or unsubstituted aromatic hydrocarbon group which may be bonded through a linking group, or a substituted or unsubstituted heterocyclic group which may be bonded through a linking group;
- Cp represents a coupler residual group having a phenolic hydroxyl group, at least one of said Cp representing a coupler residual group represented by the following Formula (2);
- and n represents an integer of 2 to 4, ##STR92## wherein A represents a divalent group of a substituted or unsubstituted aromatic hydrocarbon ring or a divalent group of a substituted or unsubstituted heterocyclic ring containing a nitrogen atom in the ring.
An electrophotographic apparatus comprising an electrophotographic photosensitive member, a means for forming an electrostatic latent image, a developing means for developing the electrostatic latent image formed and a transfer means for transferring the developed image to a transfer medium;
- said electrophotographic photosensitive member comprising a conductive support and a photosensitive layer provided thereon, wherein said photosensitive layer contains an azo pigment represented by the following Formula (1), ##STR93## wherein Ar represents a substituted or unsubstituted aromatic hydrocarbon group which may be bonded through a linking group, or a substituted or unsubstituted heterocyclic group which may be bonded through a linking group;
- Cp represents a coupler residual group having a phenolic hydroxyl group, at least one of said Cp representing a coupler residual group represented by the following Formula (2);
- and n represents an integer of 2 to 4. ##STR94## wherein A represents a divalent group of a substituted or unsubstituted aromatic hydrocarbon ring or a divalent group of a substituted or unsubstituted heterocyclic ring containing a nitrogen atom in the ring.
Dependencies are inferred from the claim text.