Patent US4456369A successfully refreshed from Google Patents.
US4456369A
Expired / Lapsed
US
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Copying machine with automatic document feeder
Assignee: Canon Inc
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Filing: 1981-11-12
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Granted: 1984-06-26
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Expires: 2001-11-12
Abstract
Abstract There is disclosed a copying machine with an automatic document feeder in which an original is held on a holding drum and a copy sheet is fed to a photosensitive drum in synchronism with the rotation of the holding drum. The copying machine with an automatic document feeder has circulator for holding an original exposure, for exposing to light the original held on said circulator to form an image on a transfer material at an image-forming section, feeder for feeding the transfer material to said image-forming section, a generator for generating a reference signal in synchronism with rotation of said circulator, and a controller for controlling said feeder in response to said reference signal.
Inventors
- 👤 Yukio Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:47
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/625; G03B27/6257
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
A copying machine having an automatic document feeder comprising: movement and feed out means for moving and feeding out an original for scanning of the original, said means moving circulatively the original in one direction; image forming means for forming an image on a recording material according to the original; feeding means for feeding the recording material to said image forming means; and control means for controlling the operation of said feeding means in accordance with a variable timing signal, wherein a moving velocity of the original moved by said movement and feed out means and an image forming velocity of said image forming means are relatively variable and determine said variable signal according to a selected copy magnification.
Claim 2
Dependent Claim
119 words
A copying machine having an automatic document feeder comprising: movement and feed out means for moving and feeding out an original for scanning of the original, said means moving circulatively the original in one direction; image forming means for forming an image on a recording material according to the original; feeding means for feeding the recording material to said image forming means; and control means for controlling the operation of said feeding means in accordance with a variable timing signal, wherein a moving velocity of the original moved by said movement and feed out means and an image forming velocity of said image forming means are relatively variable and determine said variable signal according to a selected copy magnification.
Claim 3
Dependent Claim
28 words
A copying machine according to claim 1, wherein said control means further controls a timing at which the recording material is fed from a recording material housing section.
Claim 4
Dependent Claim
25 words
A copying machine according to claim 1, wherein said feeding means has registering means, an operation timing of which is controlled by said controlling means.
Claim 5
Dependent Claim
55 words
A copying machine according to claim 1, wherein said movement and feed out means includes circulating means for circulating the original, and further comprising means for generating a reference signal upon each revolution of said circulating means, wherein said control means controls said feeding means in accordance with the reference signal and the copy magnification.
Claim 6
Dependent Claim
14 words
A copying machine according to claim 1, wherein said circulating means comprises a drum.
Claim 7
Dependent Claim
43 words
A copying machine according to claim 1 further comprising means for generating a reference signal based on operation of said movement and feed out means, wherein said control means controls said feeding means in accordance with the reference signal and the copy magnification.
Claim 8
Dependent Claim
24 words
A copying machine according to claim 6 wherein said reference signal generating means has different signal generation section corresponding to the respective copy magnifications.
References Cited (Backward Citations)
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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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |