US3845951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foraminous sheet registration system
Assignee: Xerox Corp
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Filing: 1973-06-05
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Granted: 1974-11-05
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Expires: 1993-06-05
Abstract
Abstract A sheet registration system for registering the leading edge of a sheet being fed through the nip between a sheet feeding roller and an opposing surface including a sheet feeding roller of foraminous material having a sheet registration lip which is temporarily resiliently suppressed in the nip by compression into the foraminous material to provide a continuous uniform nip engagement between the roller and the opposing surface. A vacuum can be applied through the foraminous material to hold the sheet against the roller and registration lip.
Inventors
- 👤 R Hamaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/1685; B; B65; B65H; B65H5/00; B65H5/22; B65H5/222; B65H5/226; B65H9/00; B65H9/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
A sheet registration system comprising: a sheet feeding roller having a thick layer of compressible foraminous material and a generally smooth outer sheet feeding surface; at least one sheet registration lip comprising a sheet edge detaining discontinuity in said outer surface of said roller; an opposing sheet feeding surface against which said foraminous material layer is compressed with moderate pressure to provide a sheet feeding nip therebetween; and drive means providing sheet feeding movement of said outer surface of said roller and said registration lip through said nip, said registration lip being temporarily resiliently suppressed by compression into said foraminous material layer smoothly and evenly with said outer surface of said roller in passing through said nip, and said roller providing continuous even contact between said outer surface thereof, including said registration lip, and said opposing surface in said nip, wherein said registration lip is monolithically formed from said same foraminous material.
Claim 2
Dependent Claim
152 words
A sheet registration system comprising: a sheet feeding roller having a thick layer of compressible foraminous material and a generally smooth outer sheet feeding surface; at least one sheet registration lip comprising a sheet edge detaining discontinuity in said outer surface of said roller; an opposing sheet feeding surface against which said foraminous material layer is compressed with moderate pressure to provide a sheet feeding nip therebetween; and drive means providing sheet feeding movement of said outer surface of said roller and said registration lip through said nip, said registration lip being temporarily resiliently suppressed by compression into said foraminous material layer smoothly and evenly with said outer surface of said roller in passing through said nip, and said roller providing continuous even contact between said outer surface thereof, including said registration lip, and said opposing surface in said nip, wherein said registration lip is monolithically formed from said same foraminous material.
Claim 3
Dependent Claim
23 words
The system of claim 1 wherein the thickness of said foraminous layer is substantially greater than the dimensions of said registration lip discontinuity.
Claim 4
Dependent Claim
41 words
The system of claim 1 wherein said roller is generally cylindrical and has an axis of rotation and said registration lip comprises an integral rib extending radially above and axially along said roller outer surface parallel to said axis of rotation.
Claim 5
Dependent Claim
31 words
The system of claim 1 further including sheet feeding means for feeding a sheet into buckling engagement with said registRation lip while said registration lip is substantially spaced from said nip.
Claim 6
Dependent Claim
27 words
The system of claim 1 further including vacuum means applying a sheet retaining vacuum to said outer sheet feeding surface of said roller through said foraminous material.
Claim 7
Dependent Claim
18 words
The system of claim 1 further including vacuum cleaning means deformably engaging the outer surface of said roller.
Claim 8
Dependent Claim
60 words
The system of claim 1 wherein said roller is generally cylindrical and has an axis of rotation and said registration lip comprises an integral rib extending radially above and axially along said roller outer surface parallel to said axis of rotation, and wherein the thickness of said foraminous layer is substantially greater than the dimensions of said registration lip discontinuity.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |