Patent US4092165A successfully refreshed from Google Patents.
US4092165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a donor member mold
Assignee: Xerox Corp
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Filing: 1976-12-03
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Granted: 1978-05-30
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Expires: 1996-12-03
Abstract
Abstract Electrostatic imaging apparatus for transfer development of latent images employing a developer donor member with a plurality of raised micro-pins on the donor surface, for self-spacing the donor from the imaging surface. Methods of producing such donors are disclosed.
Inventors
- 👤 Paul G. Andrus
- 👤 Osmar A. Ullrich
- 👤 James M. Hardenbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:08
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0806; G03G15/0818; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
A method for fabricating a donor member having a surface capable of supporting a layer of particulate latent image developing electroscopic powder, said surface having permanently disposed thereon a plurality of raised, discrete micro-pin self-spacing elements, which comprises: (a) exposing a layer of photo-softenable material having a thickness of about 1.7 mils to about 3.5 mils coated on a substrate, through a transparency having a relatively uniform pattern of small clear dots of about 1.8 mils in diameter; (b) removing the softened areas to leave depressions in said material; (c) electroplating said material with a second material to form from said second material a member having disposed on one surface a pattern of said raised, discrete micro-pin elements, and (d) separating said member formed with said second material from the material formed in step (b).
Claim 2
Independent Claim
135 words
A method for fabricating a donor member having a surface capable of supporting a layer of particulate latent image developing electroscopic powder, said surface having permanently disposed thereon a plurality of raised, discrete micro-pin self-spacing elements, which comprises: (a) exposing a layer of photo-softenable material having a thickness of about 1.7 mils to about 3.5 mils coated on a substrate, through a transparency having a relatively uniform pattern of small clear dots of about 1.8 mils in diameter; (b) removing the softened areas to leave depressions in said material; (c) electroplating said material with a second material to form from said second material a member having disposed on one surface a pattern of said raised, discrete micro-pin elements, and (d) separating said member formed with said second material from the material formed in step (b).
Claim 3
Independent Claim
150 words
A method for fabricating a donor member having a surface capable of supporting a layer of particulate latent image developing electroscopic powder, said surface having permanently disposed thereon a plurality of raised, discrete micro-pin self-spacing elements, which comprise; (a) exposing a layer of photo-hardenable material having a thickness of about 2.9 mils, coated on a substrate, through a transparency having a relatively uniform pattern of small clear dots of about 1.5 mils in diameter; (b) removing the non-hardened portions of the layer to leave the hardened, micro-pin elements permanently adhered to the substrate; (c) electroplating a layer of a suitable material including nickel upon the micro-pin composite to form a mold; (d) removing the micro-pin composite from the nickel mold; (e) passivating the nickel mold; (f) electroplating the nickel mold with a suitable material including nickel to form a donor member; and (g) separating the donor member from said mold.
Claim 4
Independent Claim
150 words
A method for fabricating a donor member having a surface capable of supporting a layer of particulate latent image developing electroscopic powder, said surface having permanently disposed thereon a plurality of raised, discrete micro-pin self-spacing elements, which comprise; (a) exposing a layer of photo-hardenable material having a thickness of about 2.9 mils, coated on a substrate, through a transparency having a relatively uniform pattern of small clear dots of about 1.5 mils in diameter; (b) removing the non-hardened portions of the layer to leave the hardened, micro-pin elements permanently adhered to the substrate; (c) electroplating a layer of a suitable material including nickel upon the micro-pin composite to form a mold; (d) removing the micro-pin composite from the nickel mold; (e) passivating the nickel mold; (f) electroplating the nickel mold with a suitable material including nickel to form a donor member; and (g) separating the donor member from said mold.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |