Patent US5124220A successfully refreshed from Google Patents.
US5124220A
Expired / Lapsed
US
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Bilayer topcoats for organic photoconductive elements
Assignee: 3M Co
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Filing: 1990-04-27
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Granted: 1992-06-23
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Expires: 2010-04-27
Abstract
Abstract The use of a barrier layer between photoconductor layers and release layers in electrographic imaging materials provides enhanced performance, particularly in multiple use of the imaging materials in liquid toned imaging processes.
Inventors
- 👤 David E. Brown
- 👤 Susan K. Jongewaard
- 👤 Roger I. Krech
- 👤 Gregory L. Zwadlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:04
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14795; G03G5/142; G03G5/14717; G03G5/1473; G03G5/14747; G03G5/14773; G03G5/14782
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
84 words
An organic photoconductor element for use in electrophotographic imaging comprising an organic photoconductive layer having on one surface thereof a barrier layer on said photoconductor layer and a release layer topcoat on said barrier layer, said barrier layer inhibiting the transport of material between said photoconductor layer and said release layer and said barrier layer comprising an organic polymeric film forming layer having a thickness of at least 0.02 micrometers and which barrier layer is of a different chemical composition than said release layer.
Claim 2
Dependent Claim
84 words
An organic photoconductor element for use in electrophotographic imaging comprising an organic photoconductive layer having on one surface thereof a barrier layer on said photoconductor layer and a release layer topcoat on said barrier layer, said barrier layer inhibiting the transport of material between said photoconductor layer and said release layer and said barrier layer comprising an organic polymeric film forming layer having a thickness of at least 0.02 micrometers and which barrier layer is of a different chemical composition than said release layer.
Claim 3
Dependent Claim
14 words
The element of claim 1 wherein said release layer comprises an organo-silicone polymeric layer.
Claim 4
Dependent Claim
23 words
The element of claim 1 wherein said barrier layer comprises a polar polymer which has a glass transition temperature higher than 40° C.
Claim 5
Dependent Claim
25 words
The element of claim 2 wherein said barrier layer comprises a polymer selected from the group consisting of acrylic polymers, vinyl resins, and cellulosic polymers.
Claim 6
Dependent Claim
25 words
The element of claim 3 wherein said barrier layer comprises a polymer selected from the group consisting of acrylic polymers, vinyl resins, and cellulosic polymers.
Claim 7
Dependent Claim
42 words
The element of claim 1 wherein said barrier layer comprises a polymer selected from the group consisting of acrylic polymers and vinyl resins wherein said polymers of said barrier layer are polar, have glass transition temperatures over 40° C., and are crosslinked.
Claim 8
Dependent Claim
23 words
The element of claim 3 wherein said barrier layer comprises a polymer selected from the group consisting of acrylic polymers and vinyl resins.
Claim 9
Dependent Claim
71 words
A process for generating an electrophotographic image comprising the steps of providing a charge on the element of claim 1, imagewise removing charge from said element, applying a liquid toner to said element after imagewise removal of charge so as to form an imagewise distribution of toner on said element, contacting said imagewise distribution of toner with a receptor surface and transferring said imagewise distribution of toner to said receptor surface.
Claim 10
Dependent Claim
71 words
A process for generating an electrophotographic image comprising the steps of providing a charge on the element of claim 2, imagewise removing charge from said element, applying a liquid toner to said element after imagewise removal of charge so as to form an imagewise distribution of toner on said element, contacting said imagewise distribution of toner with a receptor surface and transferring said imagewise distribution of toner to said receptor surface.
Claim 11
Dependent Claim
71 words
A process for generating an electrophotographic image comprising the steps of providing a charge on the element of claim 3, imagewise removing charge from said element, applying a liquid toner to said element after imagewise removal of charge so as to form an imagewise distribution of toner on said element, contacting said imagewise distribution of toner with a receptor surface and transferring said imagewise distribution of toner to said receptor surface.
Claim 12
Dependent Claim
71 words
A process for generating an electrophotographic image comprising the steps of providing a charge on the element of claim 4, imagewise removing charge from said element, applying a liquid toner to said element after imagewise removal of charge so as to form an imagewise distribution of toner on said element, contacting said imagewise distribution of toner with a receptor surface and transferring said imagewise distribution of toner to said receptor surface.
Claim 13
Dependent Claim
71 words
A process for generating an electrophotographic image comprising the steps of providing a charge on the element of claim 6, imagewise removing charge from said element, applying a liquid toner to said element after imagewise removal of charge so as to form an imagewise distribution of toner on said element, contacting said imagewise distribution of toner with a receptor surface and transferring said imagewise distribution of toner to said receptor surface.
Claim 14
Dependent Claim
71 words
A process for generating an electrophotographic image comprising the steps of providing a charge on the element of claim 7, imagewise removing charge from said element, applying a liquid toner to said element after imagewise removal of charge so as to form an imagewise distribution of toner on said element, contacting said imagewise distribution of toner with a receptor surface and transferring said imagewise distribution of toner to said receptor surface.
Claim 15
Dependent Claim
78 words
An organic photoconductor element for use in electrophotographic imaging comprising an organic photoconductive layer having on one surface thereof a barrier layer on said photoconductor layer comprising a polymer selected from the group consisting of acrylic polymers and cellulosic polymers and a release layer topcoat on said barrier layer, said barrier layer comprising an organic polymeric film forming layer having a thickness of at least 0.02 micrometers and is of a different chemical composition than said release layer.
Claim 16
Dependent Claim
78 words
An organic photoconductor element for use in electrophotographic imaging comprising an organic photoconductive layer having on one surface thereof a barrier layer on said photoconductor layer comprising a polymer selected from the group consisting of acrylic polymers and cellulosic polymers and a release layer topcoat on said barrier layer, said barrier layer comprising an organic polymeric film forming layer having a thickness of at least 0.02 micrometers and is of a different chemical composition than said release layer.
Claim 17
Dependent Claim
15 words
The element of claim 14 wherein said release layer consists of an organo-silicone polymeric layer.
Claim 18
Dependent Claim
40 words
The element of claim 14 wherein said barrier layer has transition temperature greater than 40° C., a degree of crosslinking in excess of 1.01, polarity, and a solubility in water, alcohol, or water/alcohol mixtures of at least 0.1% by weight.
Claim 19
Dependent Claim
109 words
An organic photoconductor element for use in electrophotographic imaging comprising an organic photoconductive layer having on one surface thereof a barrier layer on said photoconductor layer and a release layer topcoat on said barrier layer, said barrier layer inhibiting the transport of material between said photoconductor layer and said release layer and said barrier layer comprising an organic polymeric film forming layer having a thickness of at least 0.02 micrometers and which barrier layer is of a different chemical composition than said release layer, said barrier layer comprising a polymer having polarity, a glass transition temperature greater than 40° C., and a degree of crosslinking in excess of 1.01.
Claim 20
Dependent Claim
109 words
An organic photoconductor element for use in electrophotographic imaging comprising an organic photoconductive layer having on one surface thereof a barrier layer on said photoconductor layer and a release layer topcoat on said barrier layer, said barrier layer inhibiting the transport of material between said photoconductor layer and said release layer and said barrier layer comprising an organic polymeric film forming layer having a thickness of at least 0.02 micrometers and which barrier layer is of a different chemical composition than said release layer, said barrier layer comprising a polymer having polarity, a glass transition temperature greater than 40° C., and a degree of crosslinking in excess of 1.01.
Claim 21
Dependent Claim
25 words
The element of claim 17 wherein said barrier layer comprises a polymer selected from the group consisting of acrylic polymers, vinyl resins, and cellulosic polymers.
Claim 22
Dependent Claim
64 words
An organic photoconductor element for use in electrophotographic imaging comprising an organic photoconductive layer having on one surface thereof a barrier layer on said photoconductor layer and a release layer topcoat on said barrier layer, said barrier layer comprising an organic polymeric film forming layer having a thickness of at least 0.02 micrometers and is of a different chemical composition than said release layer.
Claim 23
Dependent Claim
64 words
An organic photoconductor element for use in electrophotographic imaging comprising an organic photoconductive layer having on one surface thereof a barrier layer on said photoconductor layer and a release layer topcoat on said barrier layer, said barrier layer comprising an organic polymeric film forming layer having a thickness of at least 0.02 micrometers and is of a different chemical composition than said release layer.
References Cited (Backward Citations)
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