US3623808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic-copying apparatus
Assignee: Agfa Gevaert AG
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Filing: 1970-04-24
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Granted: 1971-11-30
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Expires: 1990-04-24
Abstract
Abstract A photographic copying apparatus wherein a web of photosensitive material is moved stepwise to place successive increments into registry with a printing station. The web is driven by a roller which can be suddenly arrested in response to detection of bits of information encoded on a carrier which travels in synchronism with the web or forms an integral part of the web. The shaft of the roller is rotated by the driven element of a clutch and carries a gear whose teeth are engaged by a pawl which is controlled by a device serving to detect successive bits on the carrier whereby the pawl holds the roller against rotation during intervals which are required for exposure of photosensitive material to printing light.
Inventors
- 👤 Wilhelm Baasner
- 👤 Boris Koleff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:00
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/587
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
155 words
In a photographic copying apparatus wherein an elongated web travels along a predetermined path to place successive equidistant increments thereof into registry with a printing station, a combination comprising a carrier arranged to travel in synchronism with the web; coding means arranged to encode on said carrier bits of detectable information whenever one of said increments registers with said station; rotary advancing means arranged to transport the web lengthwise; drive means including a driven first rotary element and a second rotary element connected to said advancing means anD normally receiving torque from said first element; and interrupter means for abruptly arresting and temporarily holding said advancing means against rotation, including a gear rigid with said second element, arresting means movable into and from engagement with said gear, and detector means arranged to effect abrupt movement of said arresting means into engagement with said gear in immediate response to detection of successive bits on said carrier.
Claim 2
Dependent Claim
155 words
In a photographic copying apparatus wherein an elongated web travels along a predetermined path to place successive equidistant increments thereof into registry with a printing station, a combination comprising a carrier arranged to travel in synchronism with the web; coding means arranged to encode on said carrier bits of detectable information whenever one of said increments registers with said station; rotary advancing means arranged to transport the web lengthwise; drive means including a driven first rotary element and a second rotary element connected to said advancing means anD normally receiving torque from said first element; and interrupter means for abruptly arresting and temporarily holding said advancing means against rotation, including a gear rigid with said second element, arresting means movable into and from engagement with said gear, and detector means arranged to effect abrupt movement of said arresting means into engagement with said gear in immediate response to detection of successive bits on said carrier.
Claim 3
Dependent Claim
46 words
A combination as defined in claim 1, wherein said arresting means comprises a pawl and wherein said gear comprises an annulus of teeth, the angular distance covered by said advancing means between successive stoppages thereof being a whole multiple of the circular pitch of said gear.
Claim 4
Dependent Claim
34 words
A combination as defined in claim 2, further comprising brake means arranged to apply to said advancing means a braking force in response to movement of said arresting means into engagement with said gear.
Claim 5
Dependent Claim
32 words
A combination as defined in claim 2, wherein said elements form part of an electromagnetic clutch which is deenergized in response to movement of said arresting means into engagement with said gear.
Claim 6
Dependent Claim
24 words
A combination as defined in claim 1, wherein said detector means is adjustable in and counter to the direction of travel of said carrier.
Claim 7
Dependent Claim
15 words
A combination as defined in claim 1, wherein said carrier forms part of the web.
Claim 8
Dependent Claim
59 words
A combination as defined in claim 1, wherein said carrier is a rotary drum having an endless magnetic surface and wherein said coding means comprises a recording head adjacent to said surface, said detector means comprising a reproducing head adjacent to said surface and located past said recording head as considered in the direction of rotation of said drum.
Claim 9
Dependent Claim
27 words
A combination as defined in claim 7, further comprising erasing means disposed past said reproducing head and arranged to erase said bits upstream of said recording head.
Claim 10
Dependent Claim
23 words
A combination as defined in claim 7, wherein at least one of said heads is adjustable in the circumferential direction of said drum.
Claim 11
Dependent Claim
23 words
A combination as defined in claim 1, wherein said advancing means comprises a roller and said elements form part of a friction clutch.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |