Patent US3784298A successfully refreshed from Google Patents.
US3784298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll duplicator
Assignee: Canon Inc
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Filing: 1973-02-27
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Granted: 1974-01-08
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Expires: 1993-02-27
Abstract
Abstract An improved roll duplicator is employed to continuously produce a predetermined number of copies from an endless original film by means of counting the number of an output signal of a photosenser by a counter. The photosenser for generating the output signal in response to the reception of the light reflected back from a mark on the endless original film comprises a photoelectric cell having a large light intercepting surface. The counter has a plurality of first contacts and a movable contact which is stepped in response to an output signal from the photosenser. A presetting device comprises a switch having a plurality of second contacts each corresponding to each the plurality of first contacts. The transport of the endless original film and copy film is interrupted when the movable contact makes into contact with one of the first contacts corresponding to one of the second contacts which has been presetted.
Inventors
- 👤 M Kanayama
- 👤 T Toda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:09
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/04; G03B27/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
259 words
A roll duplicator in which an unexposed rolled copy film and an endless original film are continuously transported so as to print the images on said original film upon said copy film CHARACTERIZED BY comprising a. means for transporting said endless original film and said unexposed rolled copy film to an exposure device, b. means disposed adjacent to the path of said endless original film for illuminating a mark upon said endless original film, c. photoelectric means for giving the output signal in response to the interception of the light reflected back from said mark on said endless original film, d. means for counting the number of said output signals from said photoelectric means, said counting means having a plurality of first contacts and a movable contact which is stepped or shifted in response to said output signal of said photoelectric means so as to contact with one of said plurality of first contacts, e. means for presetting a number of said output signals to be counted, said presetting means comprising switching means having a plurality of second contacts equal in number to said plurality of first contacts and means for applying a voltage to one of said plurality of second contacts which are electrically connected to the corresponding first contacts, and f. means for interrupting the transport of said endless original film and said copy film by said transporting means when said movable contact makes into contact with one of said first contacts corresponding to one of said second contacts which is energized by said voltage application means.
Claim 2
Dependent Claim
259 words
A roll duplicator in which an unexposed rolled copy film and an endless original film are continuously transported so as to print the images on said original film upon said copy film CHARACTERIZED BY comprising a. means for transporting said endless original film and said unexposed rolled copy film to an exposure device, b. means disposed adjacent to the path of said endless original film for illuminating a mark upon said endless original film, c. photoelectric means for giving the output signal in response to the interception of the light reflected back from said mark on said endless original film, d. means for counting the number of said output signals from said photoelectric means, said counting means having a plurality of first contacts and a movable contact which is stepped or shifted in response to said output signal of said photoelectric means so as to contact with one of said plurality of first contacts, e. means for presetting a number of said output signals to be counted, said presetting means comprising switching means having a plurality of second contacts equal in number to said plurality of first contacts and means for applying a voltage to one of said plurality of second contacts which are electrically connected to the corresponding first contacts, and f. means for interrupting the transport of said endless original film and said copy film by said transporting means when said movable contact makes into contact with one of said first contacts corresponding to one of said second contacts which is energized by said voltage application means.
Claim 3
Dependent Claim
22 words
A roll duplicator as defined in claim 1 wherein said photoelectric means comprises a photoelectric cell having a large light intercepting surface.
Claim 4
Dependent Claim
39 words
A roll duplicator as defined in claim 1 wherein said switching means comprises a plurality of stationary contacts and a movable contact engageable with one of said plurality of stationary contacts and electrically connected to said voltage application means.
Claim 5
Dependent Claim
48 words
A roll duplicator as defined in claim 1 wherein said counter means comprises a plurality of stationary contacts and a movable contact which is stepped in response to said output signal of said photoelectric means os so to contact with one of said plurality of stationary contacts sequentially.
Claim 6
Dependent Claim
35 words
A roll duplicator as defined in claim 3 wherein said counter means further comprises means for indicating the number counted by said counter means, and said movable contact of said switching means is manually operated.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |