US5418100A — Crack-free electrophotographic imaging device and…

Claim 1

Independent Claim 71 words

An electrophotographic imaging member comprising a charge generating layer contiguous on one side to a charge transport layer and on the other side to an adhesive layer, said charge transport layer being formed by solution coating a material which is soluble in a solvent, said adhesive layer being formed of a film-forming polymer which is substantially insoluble in said solvent and wherein said charge generating layer is resistant to two-dimensional mud-cracking.

Claim 2

Dependent Claim 71 words

An electrophotographic imaging member comprising a charge generating layer contiguous on one side to a charge transport layer and on the other side to an adhesive layer, said charge transport layer being formed by solution coating a material which is soluble in a solvent, said adhesive layer being formed of a film-forming polymer which is substantially insoluble in said solvent and wherein said charge generating layer is resistant to two-dimensional mud-cracking.

Claim 3

Dependent Claim 12 words

The imaging member of claim 1, wherein said film-forming polymer is cross-linked.

Claim 4

Dependent Claim 12 words

The imaging member of claim 1, wherein said solvent comprises chlorinated solvent.

Claim 5

Dependent Claim 12 words

The imaging member of claim 1, wherein said solvent comprises methylene chloride.

Claim 6

Dependent Claim 35 words

The imaging member of claim 1, wherein said adhesive layer is comprised of a cross-linked copolyester which is a reaction product of a reactant copolyester having more than two hydroxy functionalities and a cross-linking agent.

Claim 7

Dependent Claim 13 words

The imaging member of claim 5, wherein said cross-linking agent is a triisocyanate.

Claim 8

Dependent Claim 16 words

The imaging member of claim 5, wherein said reactant copolyester is a short chain branched copolyester.

Claim 9

Dependent Claim 25 words

The imaging member of claim 1, wherein said adhesive layer comprises cross-linked polyurethane which is a reaction product of a prepolymer and a cross-linking agent.

Claim 10

Dependent Claim 21 words

The imaging member of claim 8, wherein said cross-linked polyurethane is a reaction product of a polyol prepolymer and a diisocyanate.

Claim 11

Dependent Claim 15 words

The imaging member of claim 1, wherein said charge generating layer is vacuum sublimation deposited.

Claim 12

Dependent Claim 55 words

An electrophotographic imaging member, comprising a supporting substrate having an electrically conductive layer, a charge blocking layer, an adhesive layer, a charge generating layer, and a charge transport layer, said adhesive layer formed from a cross-linked film-forming polymer which is substantially insoluble in methylene chloride and said charge generating layer is resistant to two-dimensional mud-cracking.

Claim 13

Dependent Claim 55 words

An electrophotographic imaging member, comprising a supporting substrate having an electrically conductive layer, a charge blocking layer, an adhesive layer, a charge generating layer, and a charge transport layer, said adhesive layer formed from a cross-linked film-forming polymer which is substantially insoluble in methylene chloride and said charge generating layer is resistant to two-dimensional mud-cracking.

Claim 14

Dependent Claim 22 words

The imaging member of claim 11, wherein said adhesive layer comprises at least one of a cross-linked copolyester and a cross-linked polyurethane.

Claim 15

Dependent Claim 28 words

The imaging member of claim 12, wherein said cross-linked copolyester is a reaction product of a cross-linking agent and a reactant copolyester having more than two hydroxy functionalities.

Claim 16

Dependent Claim 16 words

The imaging member of claim 13, wherein said reactant copolyester is a short chain branched copolyester.

Claim 17

Dependent Claim 13 words

The imaging member of claim 13, wherein said cross-linking agent is a triisocyanate.

Claim 18

Dependent Claim 20 words

The imaging member of claim 12, wherein said polyurethane is a reaction product of a polyol prepolymer and a diisocyanate.

Claim 19

Dependent Claim 15 words

The imaging member of claim 11, wherein said charge generating layer is vacuum sublimation deposited.

Claim 20

Dependent Claim 54 words

An electrophotographic imaging member comprising a charge blocking layer, an adhesive layer, a charge generating layer, and a charge transport layer, said charge transport layer being applied with a solvent, said adhesive layer formed from a material which is substantially insoluble in said solvent and said charge generating layer being resistant to two-dimensional mud-cracking.

Claim 21

Dependent Claim 54 words

An electrophotographic imaging member comprising a charge blocking layer, an adhesive layer, a charge generating layer, and a charge transport layer, said charge transport layer being applied with a solvent, said adhesive layer formed from a material which is substantially insoluble in said solvent and said charge generating layer being resistant to two-dimensional mud-cracking.

Claim 22

Dependent Claim 32 words

The imaging member of claim 18, wherein said charge transport layer comprises an electrically inactive resin material selected from the group consisting of 4,4'-cyclohexylidene diphenyl polycarbonates, polystyrenes, polyarylates, polysilylenes and polyether carbonates.

Claim 23

Dependent Claim 17 words

The imaging member of claim 18, wherein said charge generating layer comprises a vacuum sublimation deposited material.

Claim 24

Dependent Claim 24 words

The imaging member of claim 20, wherein said charge generating layer comprises at least one of a benzimidazole perylene and a chloro indium phthalocyanine.

Claim 25

Dependent Claim 24 words

The imaging member of claim 18, wherein said adhesive layer comprises at least one of a copolyester, a cross-linked copolyester and a cross-linked polyurethane.

Claim 26

Dependent Claim 16 words

The imaging member of claim 18, wherein said adhesive layer comprises a copolyester and a polycarbonate.

Claim 27

Dependent Claim 28 words

The imaging member of claim 23, wherein said copolyester forms a first layer adjacent said blocking layer, and said polycarbonate forms a second layer on said first layer.

Claim 28

Independent Claim 79 words

A method for producing an electrophotographic imaging member, comprising: forming at least one lower layer of an electrophotographic imaging member; coating an adhesive layer on said lower layer; depositing a charge generating layer on said adhesive layer; solution coating a two-dimensional mud-crack resistant charge transport layer on said charge generating layer, an inactive resin binder of said charge transport layer being dissolved in a solvent; said adhesive layer formed from a material which is substantially insoluble in said solvent.

Claim 29

Independent Claim 79 words

A method for producing an electrophotographic imaging member, comprising: forming at least one lower layer of an electrophotographic imaging member; coating an adhesive layer on said lower layer; depositing a charge generating layer on said adhesive layer; solution coating a two-dimensional mud-crack resistant charge transport layer on said charge generating layer, an inactive resin binder of said charge transport layer being dissolved in a solvent; said adhesive layer formed from a material which is substantially insoluble in said solvent.

Claim 30

Dependent Claim 23 words

The method of claim 25, wherein said adhesive layer comprises at least one of a copolyester, a cross-linked copolyester and a cross-linked polyurethane.

Claim 31

Dependent Claim 27 words

The method of claim 26, wherein said cross-linked copolyester is a reaction product of a cross-linking agent and a reactant copolyester having more than two hydroxy functionalities.

Claim 32

Dependent Claim 15 words

The method of claim 27, wherein said reactant copolyester is a short chain branched copolyester.

Claim 33

Dependent Claim 12 words

The method of claim 28, wherein said cross-linking agent is a triisocyanate.

Claim 34

Dependent Claim 19 words

The method of claim 26, wherein said polyurethane is the reaction product of a polyol prepolymer and a diisocyanate.

Claim 35

Dependent Claim 14 words

The method of claim 25, wherein said adhesive layer comprises a copolyester and polycarbonate.

Claim 36

Dependent Claim 27 words

The method of claim 31, wherein said copolyester forms a first layer adjacent said blocking layer, and said polycarbonate forms a second layer on said first layer.

Claim 37

Dependent Claim 10 words

The method of claim 25, wherein said solvent is toluene.

Claim 38

Dependent Claim 24 words

The imaging member of claim 1, wherein the adhesive layer is substantially insoluble in any solvent in which the charge transport layer is soluble.

Claim 39

Dependent Claim 18 words

The method of claim 25, wherein the charge generating layer is vacuum sublimation deposited on said adhesive layer.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1998-05-22	1998-11-21	1999-05-23	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2002-05-22	2002-11-21	2003-05-23	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2006-05-22	2006-11-21	2007-05-23	$7700.00	Window Closed / Lapsed

Crack-free electrophotographic imaging device and method of making same

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