US5610795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self biasing charging member
Assignee: Xerox Corp
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Filing: 1994-08-01
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Granted: 1997-03-11
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Expires: 2014-08-01
Abstract
Abstract An apparatus and method for depositing a surface charge on a dielectric medium moving at a predetermine velocity in a direction of movement, including an endless web having an exterior layer comprising piezoelectric material, position adjacent to the dielectric medium, for generating and laying down the surface charge on the dielectric medium in response to the endless web being deformed.
Inventors
- 👤 Christopher Snelling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:48
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/02; G03G13/025; G03G15/00; G03G15/02; G03G15/0208; G03G15/0216; G03G15/0233
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
70 words
An apparatus for depositing a charge on a surface, comprising. an endless web including a piezoelectric exterior layer, said endless web having a first portion positioned spaced from said surface and a second portion positioned adjacent to the surface for depositing the charge on the surface in response to said piezoelectric exterior layer being deformed; and a member, being interior of said endless web, for deforming said piezoelectric exterior layer.
Claim 2
Independent Claim
70 words
An apparatus for depositing a charge on a surface, comprising. an endless web including a piezoelectric exterior layer, said endless web having a first portion positioned spaced from said surface and a second portion positioned adjacent to the surface for depositing the charge on the surface in response to said piezoelectric exterior layer being deformed; and a member, being interior of said endless web, for deforming said piezoelectric exterior layer.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1, wherein said member comprises a plurality of rollers, said endless web being entrained about said plurality of rollers to deform said piezoelectric exterior layer thereof.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1, wherein said piezoelectric exterior layer comprises a layer of piezoelectric polymer film.
Claim 5
Dependent Claim
42 words
The apparatus of claim 1, wherein said piezoelectric exterior layer comprises: a first layer of piezoelectric polymer film having a first polarization direction; and a second layer of piezoelectric polymer film having a second polarization direction opposed to the first polarization direction.
Claim 6
Dependent Claim
42 words
The apparatus of claim 1, further comprising means for moving the surface at a first predetermined velocity in a direction of movement, and means for moving said web at a second predetermined velocity in the direction of movement relative to the surface.
Claim 7
Dependent Claim
21 words
The apparatus of claim 5, wherein said first predetermined velocity and said second predetermined velocity have a ratio greater than 3.
Claim 8
Independent Claim
95 words
An apparatus for depositing a charge on a surface, comprising; an endless web including a piezoelectric exterior layer, positioned adjacent to the surface, for depositing the charge on the surface in response to said piezoelectric exterior layer being deformed; a plurality of rollers, said endless web being entrained about said plurality of rollers to deform said piezoelectric exterior layer thereof; and wherein one of said plurality of rollers has a substantially different radii than another of said plurality of rollers to deform said piezoelectric exterior layer for depositing a tailored electric field on the surface.
Claim 9
Independent Claim
95 words
An apparatus for depositing a charge on a surface, comprising; an endless web including a piezoelectric exterior layer, positioned adjacent to the surface, for depositing the charge on the surface in response to said piezoelectric exterior layer being deformed; a plurality of rollers, said endless web being entrained about said plurality of rollers to deform said piezoelectric exterior layer thereof; and wherein one of said plurality of rollers has a substantially different radii than another of said plurality of rollers to deform said piezoelectric exterior layer for depositing a tailored electric field on the surface.
Claim 10
Independent Claim
67 words
A method of depositing a charge on a surface, comprising the steps of: providing an endless web including piezoelectric exterior layer; positioning a first portion of the endless web spaced from the surface and a second portion of the endless web adjacent to the surface; and deforming the exterior piezoelectric layer of the endless web to generate an electric field that deposit the charge on the surface.
Claim 11
Independent Claim
67 words
A method of depositing a charge on a surface, comprising the steps of: providing an endless web including piezoelectric exterior layer; positioning a first portion of the endless web spaced from the surface and a second portion of the endless web adjacent to the surface; and deforming the exterior piezoelectric layer of the endless web to generate an electric field that deposit the charge on the surface.
Claim 12
Dependent Claim
22 words
The method of claim 8, wherein said positioning step comprises the step of entraining the endless web about a plurality of rollers.
Claim 13
Dependent Claim
24 words
The method of claim 9, wherein said deforming step comprises the step of deforming the endless web about one of the plurality of rollers.
Claim 14
Dependent Claim
47 words
The method of claim 10, further comprising the steps of: moving the surface at a first predetermined velocity in a direction of movement; and rotating one of the plurality of rollers so that the endless web moves at a second predetermined velocity in the direction of movement.
Claim 15
Independent Claim
98 words
An apparatus for depositing a charge on a surface of an imaging member, comprising: a discrete charging means having an endless web including a piezoelectric exterior layer, said endless web having a first portion positioned spaced from said surface of the imaging member and a second portion positioned to engage the surface of the imaging member to deposit the charge on the surface of the imaging member in response to said piezoelectric exterior layer being deformed; and wherein said discrete charging means includes a deforming member, being interior of said endless web, for deforming said piezoelectric exterior layer.
Claim 16
Independent Claim
98 words
An apparatus for depositing a charge on a surface of an imaging member, comprising: a discrete charging means having an endless web including a piezoelectric exterior layer, said endless web having a first portion positioned spaced from said surface of the imaging member and a second portion positioned to engage the surface of the imaging member to deposit the charge on the surface of the imaging member in response to said piezoelectric exterior layer being deformed; and wherein said discrete charging means includes a deforming member, being interior of said endless web, for deforming said piezoelectric exterior layer.
Claim 17
Dependent Claim
31 words
The apparatus of claim 12, wherein said deforming member comprises a plurality of rollers, said endless web being entrained about said plurality of rollers to deform said piezoelectric exterior layer thereof.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-10 | 2000-09-09 | 2001-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-10 | 2004-09-09 | 2005-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-10 | 2008-09-09 | 2009-03-11 | $7700.00 | Window Closed / Lapsed |