Xerox Corporation

Eastman-kodak Company

Sharon E Normandin

Kathleen M Carmichael

Donald P Sullivan

Arlyce T Bowne

Edward F Grabowski

Satchidanand Mishra

Anthony M Horgan

William W Limburg

Robert C Yu

Richard L Post

Donald C VonHoene

Damodar M Pai

Trevor I Martin

David T Clarke

Nancy A Listigovers

Nigel E Milner

Gordon K Hamer

Robert F Romanet

James Daniel Mayo

Kent J Evans

Terry L Bluhm

John A Bergfjord, Sr

Brian E Springett

Cheng K Hsiao

Karl V Thomsen

Emery G Tokoli

Alfred H Willnow

Charles C Robinson

In a process for producing an electrophotographic imaging member, a charge transport layer is coated onto a support and the charge transport layer is laminated onto at least one lower layer of the electrophotographic imaging member. The electrophotographic imaging member includes a preformed transport layer laminated onto a lower layer of the electrophotographic imaging member.

Electrophotographic imaging member having laminated layers

Novel pyrazolotriazole dye-forming couplers contain an aliphatic or aromatic aryl ballast group and having one carboxy or sulfonic group on the ballast group enabling the pyrazolotriazole to have increased activity and having an ether (--O--) group or group A bonded directly to a carbon atom or arylene group that is bonded directly to the pyrazolotriazole nucleus and wherein the pyrazolotriazole is capable of forming an immobile dye in a gelatino silver halide emulsion and is free of coupling-off groups that reduce silver. When the ballast group is bonded to the pyrazoloazole nucleus by means of an aromatic group, the aromatic group is ortho substituted. Group A is ##STR1## --S--, --SO--, --SO.sub.3 --, or --OSO.sub.2 --. The ether group or group A enables the dye formed to have desired hue. These couplers are useful in photographic silver halide materials and processes.

Photographic silver halide materials and process comprising a

An electrophotographic imaging member is disclosed including a support substrate having a two layered electrically conductive ground plane layer comprising a layer comprising zirconium over a layer comprising titanium a hole blocking layer, an adhesive layer comprising a copolyester film forming resin, an intermediate layer over and in contact with the adhesive layer, the intermediate layer comprising a carbazole polymer, a charge generation layer comprising a perylene or a phthalocyanine, and a hole transport layer, said hole transport layer being substantially non-absorbing in the spectral region at which the charge generation layer generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from said charge generation layer and transporting said holes through said charge transport layer.

Multilayered photoreceptor with adhesive and intermediate layers

An electrophotographic imaging member comprising a support substrate having a two electrically conductive ground plane layer comprising a layer comprising zirconium over a layer comprising titanium,a hole blocking layer, an adhesive layer comprising a copolyester film forming resin, an intermediate layer in contact with said adhesive layer, said intermediate layer comprising a film forming carbazole polymer, a charge generation layer comprising perylene or a phthalocyanine particles dispersed in a film forming polymer binder blend of polycarbonate and carbazole polymer, and a hole transport layer, said hole transport layer being substantially non-absorbing in the spectral region at which the charge generation layer generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from said charge generation layer and transporting said holes through said charge transport layer.

Charge generation layer in an electrophotographic imaging member

An electrophotographic imaging member comprising a support substrate having a two layered electrically conductive outer surface, a hole blocking layer, an adhesive layer comprising a copolyester resin, a charge generation layer comprising photoconductive perylene or phthalocyanine particles dispersed in a film forming resin binder blend comprising polyvinyl butyral copolymer and a copolyester selected from the group consisting of a first copolyester, a second copolyester and mixtures thereof, and a charge transport layer.

Electrophotographic imaging member with improved charge generation layer

An electrophotographic imaging member comprising a support substrate having a two layered electrically conductive ground plane layer comprising a layer comprising zirconium over a layer comprising titanium, a hole blocking layer, an adhesive layer comprising a polymer blend comprising a carbazole polymer and a film forming thermoplastic resin selected from the group consisting of copolyester, polyarylate and polyurethane in contiguous contact with the hole blocking layer, a charge generation layer comprising perylene or a phthalocyanine pigment particles dispersed in a polycarbonate film forming binder in contiguous contact with the adhesive layer, and a hole transport layer, the hole transport layer being substantially non-absorbing in the spectral region at which the charge generation layer generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from the charge generation layer and transporting the holes through the charge transport layer.

Electrophotographic imaging member with improved underlayer

An electrophotographic imaging member is disclosed having an imaging surface adapted to accept a negative electrical charge, the electrophotographic imaging member comprising a metal ground plane layer comprising at least 50 percent by weight zirconium, a siloxane hole blocking layer, an adhesive layer comprising a polyacrylate film forming resin, a charge generation layer comprising benzimidazole perylene particles dispersed in a film forming resin binder of poly(4,4'-diphenyl-1,1'-cyclohexane carbonate), and a hole transport layer, the hole transport layer being substantially non-absorbing in the spectral region at which the charge generation layer generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from the charge generation layer and transporting the holes through the charge transport layer.

Multilayered photoreceptor

A process for increasing the imaging cyclic stability of titanyl phthalocyanines by adding to said titanyl phthalocyanines a perylene.

Titanyl phthalocyanine imaging member and processes

A process for the preparation of a photogenerating composition which comprises mixing titanyl phthalocyanine Type IV with the AB block copolymer polystyrene-4-vinyl pyridine in a suitable solvent.

Imaging member processes

A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of photogenerating pigments dispersed in a polystyrene/polyvinyl pyridine (A.sub.n -B.sub.m) block copolymer wherein n represents the degree of polymerization of A and m represents the degree of polymerization of B, and a charge transport layer.

Photoconductive imaging members with polymer binders

A method of controlling variations in electrical characteristics in electrophotographic imaging devices by eliminating the effect of acidic or basic impurities in a photoconductive element. A solution of a weak acid or weak base and a conjugate salt of the weak acid and the weak base is incorporated into a layer of the photoconductive element. In a process for producing the photoconductive element, a substrate is coated with a first dispersion to form a charge generating layer, and then coated with a second dispersion to form a charge transporting layer, wherein there is incorporated in at least one of the first and second dispersions a solution of a weak acid or weak base and the conjugate salt of the weak acid and weak base in an amount effective to reduce variations in the dark development potential (V.sub.DDP) and background potential (V.sub.BG) characteristics of the imaging devices.

Control of the acid/base environment in photoconductive elements

A process for the preparation of a more perfect crystalline form of the Type I polymorph of titanyl phthalocyanine which comprises dissolving a precursor titanyl phthalocyanine Type I in a solution of trihaloacetic acid and alkylene chloride; adding the resultant solution to a solvent thereby enabling precipitation of Type X titanyl phthalocyanine; separating the titanyl phthalocyanine Type X from the solution; followed by a first washing with an organic solvent and a second washing with water; slurrying the resulting Type X titanyl phthalocyanine in an organic solvent enabling conversion of said Type X to Type IV titanyl phthalocyanine; and thereafter, subjecting the Type IV titanyl phthalocyanine obtained to treatment with an organic solvent to enable said crystalline form of titanyl phthalocyanine Type I.

Processes for the preparation of titanyl phthalocyanines

An electrophotographic imaging with Po member including a supporting substrate having an electrically conductive surface, an optional charge blocking layer, a polyester adhesive layer, a polycarbonate adhesive layer, a charge generating layer, and a charge transport layer.

Electrophotographic imaging member with polyester adhesive layer and

Novel 1H-pyrazolo[3,2-c]-s-triazole dye-forming couplers containing in the 3-position a tertiary carbon group enable more extensive development of silver halide images in photographic silver halide materials and enable preparation of improved dispersions in photographic silver halide materials because of reduced tendency to form crystals. These couplers are useful in photographic silver halide materials and processes.

Novel pyrazoloazole couplers comprise an aryl or heterocyclic group having, in at least one of the ortho positions to the carbon atom (A) that is bonded to the pyrazoloazole nucleus, a substituent (B) that enables the pyrazoloazole coupler to form a magenta dye that has increased stability and has absorption controllably shifted, that is shifted hypsochromically relative to a dye formed from a similar coupler lacking substituent (B). These couplers are useful in photographic silver halide materials and processes.

Growing community of inventors

Macedon, NY, United States of America

Sharon E Normandin