Patent US3276312A successfully refreshed from Google Patents.
US3276312A
Expired / Lapsed
US
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Movable vacuum back for photographic apparatus
Assignee: Robertson Photo-Mechanix Inc
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Filing: 1964-04-08
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Granted: 1966-10-04
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Expires: 1984-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Leonard S Florsheim
- 👤 Jr Charles P Sippel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:55
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/6214; G03B1/00; G03B1/42; G03B1/48; G03B27/323
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN COMBINATION A VACUUM BACK HAVING FRONT AND REAR SIDES INCLUDING A PLATEN ON THE FRONT SIDE OF THE VACUUM BACK FORMING A WORKING SURFACE, SAID PLATEN HAVING A ZONED PATTERN OF AIR PASSAGES, FORMED THEREIN, MEANS FOR SUPPLYING A VACUUM BIAS TO SAID ZONED PATTERN OF AIR PASSAGES, THEREBY TO HOLD A SHEET MEMBER ON SAID WORKING SURFACE, SUPPORT MEANS CARRYING SAID VACUUM BACK FOR PIVOTAL MOVEMENT BETWEEN FIRST AND SECOND POSITIONS WHEREIN SAID VACUUM BACK IS INVERTED 180* FROM SAID FIRST TO SAID SECOND POSITION, SHEET STORAGE MEANS ON ONE SIDE OF SAID VACUUM BACK FOR ENGAGING SAID WORKING SURFACE AGAINST A SHEET, AND AN OPTICAL TRACK HAVING MEANS FOR PROJECTING AN IMAGE ONTO SAID SHEET WHEN SAID VACUUM BACK IS TURNED TO SAID SECOND POSITION.
Claim 2
Dependent Claim
128 words
IN COMBINATION A VACUUM BACK HAVING FRONT AND REAR SIDES INCLUDING A PLATEN ON THE FRONT SIDE OF THE VACUUM BACK FORMING A WORKING SURFACE, SAID PLATEN HAVING A ZONED PATTERN OF AIR PASSAGES, FORMED THEREIN, MEANS FOR SUPPLYING A VACUUM BIAS TO SAID ZONED PATTERN OF AIR PASSAGES, THEREBY TO HOLD A SHEET MEMBER ON SAID WORKING SURFACE, SUPPORT MEANS CARRYING SAID VACUUM BACK FOR PIVOTAL MOVEMENT BETWEEN FIRST AND SECOND POSITIONS WHEREIN SAID VACUUM BACK IS INVERTED 180* FROM SAID FIRST TO SAID SECOND POSITION, SHEET STORAGE MEANS ON ONE SIDE OF SAID VACUUM BACK FOR ENGAGING SAID WORKING SURFACE AGAINST A SHEET, AND AN OPTICAL TRACK HAVING MEANS FOR PROJECTING AN IMAGE ONTO SAID SHEET WHEN SAID VACUUM BACK IS TURNED TO SAID SECOND POSITION.
References Cited (Backward Citations)
US1695481A
Cited
US3009402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |