US4309803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low cost foam roll for electrostatographic reproduction machine
Assignee: Xerox Corp
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Filing: 1980-09-29
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Granted: 1982-01-12
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Expires: 2000-09-29
Abstract
Abstract A novel conformable foam roll for use in the electrostatographic reproducing process and machines, and an inexpensive method for making such a roll, are provided. The foam roll is made of a conductive core, which is in turn made of a paper base having a layer of a conductive material thereon, a compressible foam layer formed in situ on said core, and a smooth exterior surface layer on the foam layer.
Inventors
- 👤 Joseph R. Blaszak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:06
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/1685
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
49 words
An inexpensive conformable roll for use in an electrostatographic copying machine which comprises a conductive core made of a paper base having a layer of a conductive material thereon, a compressible foam layer formed in situ on said core, and an outer smooth surface layer on said foam layer.
Claim 2
Dependent Claim
49 words
An inexpensive conformable roll for use in an electrostatographic copying machine which comprises a conductive core made of a paper base having a layer of a conductive material thereon, a compressible foam layer formed in situ on said core, and an outer smooth surface layer on said foam layer.
Claim 3
Dependent Claim
29 words
An inexpensive conformable roll according to claim 1 wherein said outer smooth surface layer is integral with said foam layer and is produced during the in situ foaming process.
Claim 4
Dependent Claim
29 words
An inexpensive conformable roll according to claim 2 wherein said paper base is impregnated with a resin and wherein said layer of conductive material is a thin metallic layer.
Claim 5
Dependent Claim
32 words
An inexpensive conformable roll according to claim 3 wherein said paper base is a paper tube impregnated with a phenolic resin, and wherein said layer of conductive material is an aluminum foil.
Claim 6
Dependent Claim
18 words
An inexpensive conformable roll according to claim 3 wherein said foam layer is made of a urethane foam.
Claim 7
Dependent Claim
34 words
An inexpensive conformable roll according to claim 5 wherein said outer smooth surface layer is made by contacting the foaming urethane layer with a smooth surface maintained at a temperature of about 25°-110° C.
Claim 8
Dependent Claim
21 words
An inexpensive conformable roll according to claim 5 wherein said urethane foam is made of toluene diisocyanate and a polyether triol.
Claim 9
Dependent Claim
27 words
An inexpensive conformable roll according to claim 5 wherein said urethane foam layer further includes a charge control additive to decrease the electrical resistivity of the foam.
Claim 10
Dependent Claim
17 words
An inexpensive conformable roll according to claim 8 wherein said charge control additive is tetraheptyl ammonium bromide.
Claim 11
Dependent Claim
30 words
An inexpensive conformable roll according to claim 8 wherein said charge control additive is present in an amount of about 2 to 5 percent by weight of the foam formulation.
Claim 12
Dependent Claim
64 words
An inexpensive conformable roll according to claim 5 wherein said conductive core is a phenolic resin impregnated paper tube having a layer of an aluminum foil thereon, a foam layer of about 3/8 inch thick polyurethane foam on said core, and a smooth surface layer of about 3 to 4 mils thick skin formed on said foam layer during the in situ foaming process.
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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) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |