Patent US4023967A successfully refreshed from Google Patents.
US4023967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic liquid development method in which a uniform substantial interface contact is maintained
Assignee: Xerox Corp
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Filing: 1974-04-25
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Granted: 1977-05-17
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Expires: 1994-04-25
Abstract
Abstract A roller device and method for maintaining a uniform surface contact along a line of axial trangency with respect to one or more rigid cooperating surfaces having irregularities, the roller device comprising a rigid solid- or cylindrical-type core loosely circumscribed axially with a flexible sleeve, the space between the core and the sleeve being substantially equidistant and filled with a curable plastic foam material to obtain a uniform contact and nip width when in rotational contact with a cooperating surface.
Inventors
- 👤 Graeme McGibbon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:20
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101; G03G15/102; B; B29; B29D; B29D99/00; B29D99/0032; B29D99/0035; F; F16; F16C; F16C13/00; B29L; B29L2031/00; B29L2031/32; B29L2031/324; Y; Y10; Y10S; Y10S118/00; Y10S118/14; Y10S118/15
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
174 words
A method for effecting and maintaining a uniform substantial interface contact for liquid xerographic development between a xerographic liquid toner applicator roll and a cooperating electrostatic latent image-bearing surface, one of which is rigid and contains surface irregularities, and the other a non-rigid member comprising: a. a rigid core and end-supporting means; and b. a flexible sleeve mounted over the core component of the core and end-supporting means, said sleeve maintaining functional integrity as a photoreceptor or liquid developer applicator having a pattern of lands and valleys, and in contact with the interfacing member; comprising effecting liquid development of the latent electrostatic image by developmental contact, with a latent electrostatic image, utilizing as part of the non-rigid member a flexible sleeve with a substantially greater circumference than the core component and spaced substantially uniformly apart from the core component by attachment to end supporting means and by particularly cured low temperature curing monomer-containing foam material intermediate the core and the sleeve to maintain a spaced relationship between the core component and the flexible sleeve.
Claim 2
Independent Claim
174 words
A method for effecting and maintaining a uniform substantial interface contact for liquid xerographic development between a xerographic liquid toner applicator roll and a cooperating electrostatic latent image-bearing surface, one of which is rigid and contains surface irregularities, and the other a non-rigid member comprising: a. a rigid core and end-supporting means; and b. a flexible sleeve mounted over the core component of the core and end-supporting means, said sleeve maintaining functional integrity as a photoreceptor or liquid developer applicator having a pattern of lands and valleys, and in contact with the interfacing member; comprising effecting liquid development of the latent electrostatic image by developmental contact, with a latent electrostatic image, utilizing as part of the non-rigid member a flexible sleeve with a substantially greater circumference than the core component and spaced substantially uniformly apart from the core component by attachment to end supporting means and by particularly cured low temperature curing monomer-containing foam material intermediate the core and the sleeve to maintain a spaced relationship between the core component and the flexible sleeve.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein the flexible sleeve maintains functional integrity as a photoreceptor and comprises a charge conductive material coated on its outer surface with a photoconductive material in charge blocking contact.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein the charge conductive material comprises aluminum and the photoconductive material comprises a selenium alloy.
Claim 5
Dependent Claim
20 words
The method of claim 2 wherein the charge conductive material comprises nickel and the photoconductive material comprises a selenium alloy.
Claim 6
Dependent Claim
20 words
The method of claim 2 wherein the charge conductive material comprises brass and the photoconductive material comprises a selenium alloy.
Claim 7
Dependent Claim
31 words
The method of claim 1, wherein the flexible sleeve maintains functional integrity as a liquid developer applicator and comprises a flexible metal having a land and valley pattern on its surface.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein the foam material is polyurethane.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein the foam material is cold cured in situ.
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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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |