US4017172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Document feeding apparatus
Assignee: Xerox Corp
•
Filing: 1975-04-24
•
Granted: 1977-04-12
•
Expires: 1995-04-24
Abstract
Abstract A document feeding apparatus and electrostatographic reproducing machine. The apparatus includes a viewing platen and a document feeder for feeding documents over the platen. The document feeder includes at least one feed member urged against the platen to form a nip therebetween for passage of documents. The feed member is formed of a multi-component material comprising a solid polymeric component impregnated with a non-volatile liquid. The multi-component material is selected to reduce the difference between the coefficient of friction between the feed member and the platen and the coefficient of friction between the document and the platen.
Inventors
- 👤 Thomas Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/60; G03G15/602
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
A moving document exposure apparatus comprising: a viewing platen; a photosensitive surface arranged for movement; means for viewing a document at said platen and for projecting an image thereof onto said photosensitive surface; means for feeding said document over said platen and past said viewing means in synchronism with the movement of said photosensitive surface, said feeding means including at least one feed member urged against said platen to form a nip therebetween for passage of said document, said feed member being formed of a multi-component material comprising a solid polymeric component impregnated with a non-volatile liquid component, said material being selected to reduce the difference between the feed member-to-platen coefficient of friction and the document-to-platen coefficient of friction.
Claim 2
Dependent Claim
119 words
A moving document exposure apparatus comprising: a viewing platen; a photosensitive surface arranged for movement; means for viewing a document at said platen and for projecting an image thereof onto said photosensitive surface; means for feeding said document over said platen and past said viewing means in synchronism with the movement of said photosensitive surface, said feeding means including at least one feed member urged against said platen to form a nip therebetween for passage of said document, said feed member being formed of a multi-component material comprising a solid polymeric component impregnated with a non-volatile liquid component, said material being selected to reduce the difference between the feed member-to-platen coefficient of friction and the document-to-platen coefficient of friction.
Claim 3
Dependent Claim
26 words
An apparatus as in claim 1, wherein said multi-component material is selected so that said difference between said coefficients of friction is less than about 0.8.
Claim 4
Dependent Claim
24 words
An apparatus as in claim 2, wherein said non-volatile liquid component comprises from about 5 to about 20 percent by weight of said material.
Claim 5
Dependent Claim
34 words
An apparatus as in claim 3, wherein said solid polymeric component comprises polyurethane and wherein said non-volatile liquid component comprises silicone oil, whereby said material is less sensitive to moisture effects than polyurethane alone.
Claim 6
Dependent Claim
19 words
An apparatus as in claim 3, wherein the difference between said coefficients of friction comprises less than about 0.5.
Claim 7
Dependent Claim
15 words
An apparatus as in claim 5, wherein said feed member comprises at least one roll.
Claim 8
Dependent Claim
13 words
An apparatus as in claim 5, wherein said feed member comprises a web.
Claim 9
Dependent Claim
13 words
An apparatus as in claim 5, wherein said viewing means comprises optical means.
Claim 10
Dependent Claim
56 words
An apparatus as in claim 8, wherein said optical means comprises a scanning optical means for scanning a document on said platen, said scanning optical means being fixable at a given position, and said feed member being arranged to feed said documents past said fixed scanning means in synchronism with the movement of said photosensitive surface.
Claim 11
Dependent Claim
29 words
An apparatus as in claim 9, wherein said feed member is movable between an operative position in contact with said platen and an inoperative position spaced from said platen.
Claim 12
Dependent Claim
39 words
An apparatus as in claim 8, wherein said apparatus comprises an electrostatographic apparatus wherein said optical means forms an electrostatic image on said surface and said apparatus further includes means for developing said electrostatic image to render it visible.
References Cited (Backward Citations)
US3069990A
Cited
US3462058A
Cited
US3788638A
Cited
US3858975A
Cited
US3747918A
Cited
US3866572A
Cited
US3901594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |