Patent US3797797A successfully refreshed from Google Patents.
US3797797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum holding table for a photographic plate or the like
Assignee: Individual
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Filing: 1972-09-25
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Granted: 1974-03-19
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Expires: 1992-09-25
Abstract
Abstract A vacuum holding table for holding photographic plates or the like while the plate is being processed. The table includes a lever by means of which the operator can quickly load the plate and hold it securely on the table without further attention and then can quickly and positively remove the plate from the table.
Inventors
- 👤 J Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:38
CPC Classifications
B; B25; B25B; B25B11/00; B25B11/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A vacuum holding table for photographic plates or the like including a top having openings therethrough, said table also including a pair of end walls, a front wall, a rear wall and a bottom wall which all form a closed box, a flexible rubber vacuum cup fixed to the underside of said top and in communication with said openings, a shaft journalled in the end walls of said table and extending through said closed box, said shaft having an end extending outwardly from said box, an operator''s lever fixed on said shaft end for rotating said shaft, arm means extending from said shaft, and a connection between said arm means and said cup whereby movement of the lever causes compression of the cup, whereby when said cup is compressed and a plate is placed on said top and over said openings and said lever is released, said cup having sufficiently thick and resilient side walls so that it expands and a vacuum is formed in said cup thereby holding said plate on said top.
Claim 2
Dependent Claim
174 words
A vacuum holding table for photographic plates or the like including a top having openings therethrough, said table also including a pair of end walls, a front wall, a rear wall and a bottom wall which all form a closed box, a flexible rubber vacuum cup fixed to the underside of said top and in communication with said openings, a shaft journalled in the end walls of said table and extending through said closed box, said shaft having an end extending outwardly from said box, an operator''s lever fixed on said shaft end for rotating said shaft, arm means extending from said shaft, and a connection between said arm means and said cup whereby movement of the lever causes compression of the cup, whereby when said cup is compressed and a plate is placed on said top and over said openings and said lever is released, said cup having sufficiently thick and resilient side walls so that it expands and a vacuum is formed in said cup thereby holding said plate on said top.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |