US3893360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copy strip feed error correcting device
Assignee: Ricoh Co Ltd
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Filing: 1973-05-30
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Granted: 1975-07-08
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Expires: 1993-05-30
Abstract
Abstract A device adapted for use with copying apparatus wherein the feed speed of an original and a strip of photosensitive material can be set at any level as desired, comprising a plurality of detector elements disposed in the path of travel of the strip of photosensitive material and the original respectively for detecting their arrival at respective predetermined positions, and a plurality of variable timers each adapted to be rendered operative after a lapse of time varying in inverse proportion to the feed speed. Upon receipt of signals from the detector elements, the timers are rendered operative after the lapse of a preset time and actuate a first electromagnetic means moving the original ahead of the strip of photosensitive material for a predetermined distance and another electromagnetic means for actuating a cutter for cutting the strip of photosensitive material to provide a sheet of a length consistent with the length of the original. The device is effective to preclude any errors which might otherwise be made in the feed of the strip of photosensitive material when the feed speed is varied.
Inventors
- 👤 Takashi Yano
- 👤 Yoichi Shibuya
- 👤 Satoshi Kanda
- 👤 Shin Umeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:29
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/587; G03B27/588; G03B27/02; G03B27/14; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4443; Y10T83/525; Y10T83/527; Y10T83/528; Y10T83/53
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
250 words
A copy strip feed error correcting device for copying apparatus of the type wherein an original and a strip of photosensitive material are cooperatingly fed throUgh the apparatus comprising: a. a speed varying means for setting a common feed speed for said original and said strip of photosensitive material; b. first drive means for advancing said strip of photosensitive material at a feed speed in accordance with the setting of said speed varying means; c. second drive means for advancing said original at a feed speed in accordance with the setting of said speed varying means; d. first detector means for sensing the arrival of a leading end of said strip of photosensitive material and producing a signal in response thereto; e. second detector means for sensing the arrival of the trailing end of said original and producing a signal in response thereto; f. cutting means for severing said strip of photosensitive material; and g. timer means operatively connected to said speed varying means, said second drive means, said first and second detector means and said cutting means for respectively actuating said second drive means and said cutting means in response to said signals from said first and second detector means after a time lapse which is in inverse proportion to the feed speed set by said speed varying means, whereby a sheet of photosensitive material is cut to a length consistent with the length of the original when the feed speed setting is varied by said speed varying means.
Claim 2
Dependent Claim
250 words
A copy strip feed error correcting device for copying apparatus of the type wherein an original and a strip of photosensitive material are cooperatingly fed throUgh the apparatus comprising: a. a speed varying means for setting a common feed speed for said original and said strip of photosensitive material; b. first drive means for advancing said strip of photosensitive material at a feed speed in accordance with the setting of said speed varying means; c. second drive means for advancing said original at a feed speed in accordance with the setting of said speed varying means; d. first detector means for sensing the arrival of a leading end of said strip of photosensitive material and producing a signal in response thereto; e. second detector means for sensing the arrival of the trailing end of said original and producing a signal in response thereto; f. cutting means for severing said strip of photosensitive material; and g. timer means operatively connected to said speed varying means, said second drive means, said first and second detector means and said cutting means for respectively actuating said second drive means and said cutting means in response to said signals from said first and second detector means after a time lapse which is in inverse proportion to the feed speed set by said speed varying means, whereby a sheet of photosensitive material is cut to a length consistent with the length of the original when the feed speed setting is varied by said speed varying means.
Claim 3
Dependent Claim
102 words
A device as in claim 1 wherein said timer means comprises: h. a rotary shaft coupled to said speed varying means and rotatable in response to the setting of a feed speed thereon; i. a variable resistor whose resistence is varied in response to the rotation of said rotary shaft; j. a capacitor connected to said variable resistor and forming a time constant circuit therewith; k. a programmable unijunction transistor connected to and operable in response to the operation of said time constant circuit; and l. a thyristor connected to and operable in response to the operation of said programmable unijunction transistor.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |