Patent US3263556A successfully refreshed from Google Patents.
US3263556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic copying apparatus
Assignee: Gretag AG
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Filing: 1963-06-17
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Granted: 1966-08-02
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Mey Hansjuerg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:09
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/4209; G01J1/4219; G03; G03B; G03B27/00; G03B27/72; G03B27/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN A PHOTO COPYING APPARATUS COMPRISING MEANS FOR HOLDING AN ORIGINAL TO BE COPIED, A LIGHT SOURCE AND LENSES FOR TRANSMITTING A BEAM OF LIGHT THROUGH SAID ORIGINAL ONTO PHOTOSENSITIVE MATERIAL, A PHOTOSENSITIVE ELEMENT, MEANS FOR REGULATING THE EXPOSURE TIME OPERABLE BY SAID PHOTOSENSITIVE ELEMENT, A CONSTANT LIGHT SOURCE SERVING AS AN INTENSITY REFERENCE, AT LEAST ONE FIRST MIRROR, AT LEAST ONE SECOND MIRROR AND MEANS FOR PERIODICALLY MOVING SAID FIRST MIRROR INTO SAID BEAM BETWEEN THE ORIGINAL TO BE COPIED AND THE PHOTOSENSITIVE MATERIAL FOR A SHORT DURATION TO DIRECT THE WHOLE BEAM ONTO THE PHOTOSENSITIVE ELEMENT AND THEN PERIODICALLY MOVING SAID SECOND MIRROR TO DIRECT THE LIGHT FROM SAID CONSTANT LIGHT SOURCE ONTO SAID PHOTOSENSITIVE ELEMENT SO THAT THE LATTER RECEIVES IN TURN THE COPYING LIGHT WITH ITS WHOLE INTENSITY FROM SAID FIRST MIRROR AND THEN THE REFERENCE LIGHT FROM SAID SECOND MIRROR.
Claim 2
Dependent Claim
145 words
IN A PHOTO COPYING APPARATUS COMPRISING MEANS FOR HOLDING AN ORIGINAL TO BE COPIED, A LIGHT SOURCE AND LENSES FOR TRANSMITTING A BEAM OF LIGHT THROUGH SAID ORIGINAL ONTO PHOTOSENSITIVE MATERIAL, A PHOTOSENSITIVE ELEMENT, MEANS FOR REGULATING THE EXPOSURE TIME OPERABLE BY SAID PHOTOSENSITIVE ELEMENT, A CONSTANT LIGHT SOURCE SERVING AS AN INTENSITY REFERENCE, AT LEAST ONE FIRST MIRROR, AT LEAST ONE SECOND MIRROR AND MEANS FOR PERIODICALLY MOVING SAID FIRST MIRROR INTO SAID BEAM BETWEEN THE ORIGINAL TO BE COPIED AND THE PHOTOSENSITIVE MATERIAL FOR A SHORT DURATION TO DIRECT THE WHOLE BEAM ONTO THE PHOTOSENSITIVE ELEMENT AND THEN PERIODICALLY MOVING SAID SECOND MIRROR TO DIRECT THE LIGHT FROM SAID CONSTANT LIGHT SOURCE ONTO SAID PHOTOSENSITIVE ELEMENT SO THAT THE LATTER RECEIVES IN TURN THE COPYING LIGHT WITH ITS WHOLE INTENSITY FROM SAID FIRST MIRROR AND THEN THE REFERENCE LIGHT FROM SAID SECOND MIRROR.
References Cited (Backward Citations)
US3120782A
Cited
US3170022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |