US4523836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous copier
Assignee: 3M Co
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Filing: 1983-07-29
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Granted: 1985-06-18
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Expires: 2003-07-29
Abstract
Abstract A copy machine capable of producing indeterminate length copies of an exceptionally long original and including a terminal set of drive rollers which pull copy paper through the machine and a brake which is connected to a supply of continuous copy paper and which may be selectively engaged to produce a drag on the copy paper and place the paper in tension between the supply and the terminal rollers.
Inventors
- 👤 Robert F. Nepper
- 👤 Alan J. Solyntjes
- 👤 Carl W. Abrahamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:07
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6517; G03G15/6523; G03G15/6588; G03G15/6594; G03G2215/00; G03G2215/00362; G03G2215/00443; G03G2215/00518
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
A copy machine capable of producing extended indeterminate length copies comprising: a housing including a paper exit; a supply of continuous copy paper mounted within said housing; a series of rollers for transporting said paper through said housing and ending in a terminal pair of rollers adjacent said paper exit which engage said paper and transport said paper at a speed in excess of the speed at which said paper is transported by any other of the rollers in said series so that said paper is pulled through said machine by said terminal rollers; means for sensing the engagement of said paper by said terminal rollers; and means responsive to said sensing means for selectively applying a drag to said supply of copy paper so that said copy paper is in tension throughout said machine between said terminal rollers and said supply of copy paper.
Claim 2
Dependent Claim
145 words
A copy machine capable of producing extended indeterminate length copies comprising: a housing including a paper exit; a supply of continuous copy paper mounted within said housing; a series of rollers for transporting said paper through said housing and ending in a terminal pair of rollers adjacent said paper exit which engage said paper and transport said paper at a speed in excess of the speed at which said paper is transported by any other of the rollers in said series so that said paper is pulled through said machine by said terminal rollers; means for sensing the engagement of said paper by said terminal rollers; and means responsive to said sensing means for selectively applying a drag to said supply of copy paper so that said copy paper is in tension throughout said machine between said terminal rollers and said supply of copy paper.
Claim 3
Dependent Claim
33 words
A copy machine according to claim 1 wherein said means for selectively applying said drag to said supply of copy paper comprises an electrically operated brake connected to said supply of copy paper.
Claim 4
Dependent Claim
35 words
A copy machine according to claim 2 wherein said means for sensing comprises a switch operatively connected to said brake and positioned to be actuted by said paper as said paper exits said terminal rollers.
Claim 5
Dependent Claim
58 words
A copy machine according to claim 1 further including a supply of copy paper guide positioned between said paper and said terminal rollers and which is bowed from the center of said guide toward the ends of said guide so that a greater tension is applied to the center of said paper than the ends of the paper.
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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |