Patent US4687192A successfully refreshed from Google Patents.
US4687192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feed apparatus with fixed separator protrusions
Assignee: International Business Machines Corp
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Filing: 1980-09-03
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Granted: 1987-08-18
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Expires: 2000-09-03
Abstract
Abstract A rotatable feed wheel for use in a sheet shingling apparatus having fixed, relatively round protrusions spaced about its outer surface which contact and shingle sheets of paper. The rotatable feed wheel is unitarily constructed and its surface which contacts the sheets of paper is made of a material which produces a lower coefficient of friction between the wheel protrusions and the outermost sheet being shingled than the coefficient of friction between the outermost sheet of paper and its adjacent sheet in the stack.
Inventors
- 👤 Ronald E. Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:29
CPC Classifications
B; B41; B41J; B41J13/00; B41J13/02; B41J13/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A shingler wheel for shingling sheets of paper stacked in a paper feed apparatus comprising: a stack of paper including sheets having a predetermined coefficient of friction between adjacent sheets; a unitarily constructed round rotatable member having a plurality of fixed round protrusions about its periphery for engaging the outermost sheet of a stack of paper to be shingled, said round protrusions having said lower coefficient of friction with said outermost sheet than said outermost sheet has with the next adjacent sheet.
Claim 2
Dependent Claim
82 words
A shingler wheel for shingling sheets of paper stacked in a paper feed apparatus comprising: a stack of paper including sheets having a predetermined coefficient of friction between adjacent sheets; a unitarily constructed round rotatable member having a plurality of fixed round protrusions about its periphery for engaging the outermost sheet of a stack of paper to be shingled, said round protrusions having said lower coefficient of friction with said outermost sheet than said outermost sheet has with the next adjacent sheet.
Claim 3
Dependent Claim
30 words
The shingler wheel of claim 1 wherein said protrusions are curved such that the end radii of said protrusions are equal and less than the center radius of said protrusions.
Claim 4
Dependent Claim
17 words
The shingler wheel of claim 1 or claim 2 wherein said protrusions are of polished chrome construction.
Claim 5
Dependent Claim
116 words
Sheet feed apparatus comprising: a stack of sheets having a predetermined coefficient of friction between adjacent sheets; means for holding said stack of sheets; a unitarily constructed rotatable member mounted adjacent the top surface of the outermost sheet in said stack and rotatable along the feed path of said sheets, said rotatable member having a plurality of fixed curved protrusions about the periphery thereof; and means for rotating said rotatable member along said feed path into peripheral engagement of said protrusions with said outermost sheet, said protrusions having a lower coefficient of friction with said outermost sheet than said outermost sheet has with its adjacent sheet, whereby said outermost sheet and its adjacent sheets are shingled.
Claim 6
Dependent Claim
116 words
Sheet feed apparatus comprising: a stack of sheets having a predetermined coefficient of friction between adjacent sheets; means for holding said stack of sheets; a unitarily constructed rotatable member mounted adjacent the top surface of the outermost sheet in said stack and rotatable along the feed path of said sheets, said rotatable member having a plurality of fixed curved protrusions about the periphery thereof; and means for rotating said rotatable member along said feed path into peripheral engagement of said protrusions with said outermost sheet, said protrusions having a lower coefficient of friction with said outermost sheet than said outermost sheet has with its adjacent sheet, whereby said outermost sheet and its adjacent sheets are shingled.
Claim 7
Dependent Claim
113 words
Sheet feed apparatus comprising: a stack of sheets having a predetermined coefficient of friction between adjacent sheets; means for holding said stack of sheets; a unitarily constructed rotatable member mounted adjacent the bottom surface of the innermost sheet in said stack and rotatable along the feed path of said sheets, said rotatable member having a plurality of fixed curved protrusions about the periphery thereof; and means for rotating said rotatable member along said feed path with said protrusions engaging said innermost sheet, said protrusions having a lower coefficient of friction with said innermost sheet than said innermost sheet has with its adjacent sheet, whereby said innermost sheet and its adjacent sheets are shingled.
Claim 8
Dependent Claim
113 words
Sheet feed apparatus comprising: a stack of sheets having a predetermined coefficient of friction between adjacent sheets; means for holding said stack of sheets; a unitarily constructed rotatable member mounted adjacent the bottom surface of the innermost sheet in said stack and rotatable along the feed path of said sheets, said rotatable member having a plurality of fixed curved protrusions about the periphery thereof; and means for rotating said rotatable member along said feed path with said protrusions engaging said innermost sheet, said protrusions having a lower coefficient of friction with said innermost sheet than said innermost sheet has with its adjacent sheet, whereby said innermost sheet and its adjacent sheets are shingled.
Claim 9
Dependent Claim
35 words
The sheet feed apparatus of claim 4 or claim 5 wherein said curved protrusions are curved such that the end radii of said protrusions are equal and less than the center radius of said protrusions.
Claim 10
Dependent Claim
18 words
The sheet feed apparatus of claim 4 or claim 5 wherein said protrusions are of polished chrome construction.
Claim 11
Dependent Claim
19 words
The sheet feed apparatus of claim 4 or claim 5 wherein said protrusions are spaced approximately 20 degrees apart.
Claim 12
Dependent Claim
22 words
The unitarily constructed shingler wheel of claim 1 wherein said protrusions are spaced equally about the periphery of said round rotatable member.
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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) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |