US3743406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic copying apparatus
Assignee: Canon Inc
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Filing: 1970-11-05
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Granted: 1973-07-03
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Expires: 1990-11-05
Abstract
Abstract A compact and light-weight electrophotographic copying apparatus which includes an original feeding table and a photosensitive paper supply table both disposed within a machine housing in the upper portion thereof, means for transporting an original toward an original illuminating station, means for feeding sheets of photosensitive paper from said paper supply table in synchronism with the movement of the original and transporting the sheets to an exposure station optically connected to said illuminating station through an optical system, whereby the original is electrophotographically copied on the sheets of photosensitive paper in succession without any trouble or malfunctioning during operation.
Inventors
- 👤 S Komori
- 👤 J Sato
- 👤 K Umezawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:27
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
236 words
An electrophotographic copying apparatus comprising a housing having an exposure station and an original illuminating station, original feeding means for transporting an original through the original illuminating station, paper sheet supply means, means for generating a paper sheet supply signal, a paper feed drive motor energized by said signal, a transmission system driven by said motor, a paper feed roller and paper transport rollers driven by said transmission system to deliver paper sheets successively from said supply means to the exposure station, means connected to said motor and including a switch actuated by the leading edge of each paper sheet at a predetermined position for successively stopping the paper sheets at a position disposed between the paper sheet supply means and the exposure station until generation of a said supply signal, wherein said switch is disposed between one of said transport rollers and said exposure station, said transmission system including transmission mechanism means for temporarily stopping movement of said paper feed roller upon movement of a trailing edge of each paper sheet past said feed roller and for resuming movement of said feed roller during a period of continuous movement of said transport rollers thereby providing a space between succeeding sheets of paper, and L-shaped optical system means for optically connecting said original illuminating station to an exposure station so that each of said paper sheets is exposed to light carrying the image of said original.
Claim 2
Dependent Claim
236 words
An electrophotographic copying apparatus comprising a housing having an exposure station and an original illuminating station, original feeding means for transporting an original through the original illuminating station, paper sheet supply means, means for generating a paper sheet supply signal, a paper feed drive motor energized by said signal, a transmission system driven by said motor, a paper feed roller and paper transport rollers driven by said transmission system to deliver paper sheets successively from said supply means to the exposure station, means connected to said motor and including a switch actuated by the leading edge of each paper sheet at a predetermined position for successively stopping the paper sheets at a position disposed between the paper sheet supply means and the exposure station until generation of a said supply signal, wherein said switch is disposed between one of said transport rollers and said exposure station, said transmission system including transmission mechanism means for temporarily stopping movement of said paper feed roller upon movement of a trailing edge of each paper sheet past said feed roller and for resuming movement of said feed roller during a period of continuous movement of said transport rollers thereby providing a space between succeeding sheets of paper, and L-shaped optical system means for optically connecting said original illuminating station to an exposure station so that each of said paper sheets is exposed to light carrying the image of said original.
Claim 3
Dependent Claim
138 words
An apparatus according to claim 1, wherein said transmission mechanism means for temporarily stopping said paper feed roller includes floating ring means having a first engaging member and being rotatably mounted on one of said paper transport rollers, a second engaging member fixed to said one transport roller, a first sprocket, wind-up spring clutch means connected between said first sprocket and said floating ring means, a second sprocket fixed to said paper feed roller, a chain interconnecting said first and second sprockets, whereby when the trailing edge of each paper sheet leaves said paper feed roller, said second sprocket and said first engaging member of said floating ring means are temporarily stopped while said paper transport roller and said second engaging member continue to rotate so that a preceding paper sheet is separated from a succeeding paper sheet.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |