US2689179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic contact copying device
Assignee: Xerox Corp
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Filing: 1951-03-02
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Granted: 1954-09-14
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Expires: 1971-03-02
Abstract
No abstract record available.
Inventors
- 👤 Lewis E Walkup
- 👤 Harold E Copley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:20
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
AN EXPOSURE DEVICE FOR CONTACT XEROGRAPHIC COPYING WHEREIN A XEROGRAPHIC PLATE IS HELD IN CONTACT WITH COPY TO BE REPRODUCED WHILE BEING EXPOSED TO LIGHT, SAID DEVICE COMPRISING A CABINET AND A LIGHT SOURCE THEREIN, A RIGID TRANSPARENT PANEL IN A WALL OF THE CABINET AND A COVER MOVABLE OVER SAID PANEL, A RESILIENT, FLEXIBLE, TRANSPARENT PAD POSITIONED ON THE RIGID TRANSPARENT PANEL, AND A THIN, FLEXIBLE, SOFT, TRANSPARENT SHEET SECURED TO THE CABINET AND DISPOSED TO BE DRAWN OVER THE COPY TO BE REPRODUCED AND ADAPTED TO RECEIVE A XEROGRAPHIC PLATE THEREON, AND A PRESSURE PLATE RESILIENTLY MOUNTED WITHIN THE COVER AND POSITIONED OVER THE TRANSPARENT PANEL TO BEAR FIRMLY AGAINST A XEROGRAPHIC PLATE WHEN ON THE TRANSPARENT SHEET WHEREBY THE XEROGRAPHIC PLATE IS FIRMLY AND RESILIENTLY RETAINED IN AN EXPOSURE POSITION.
Claim 2
Dependent Claim
133 words
AN EXPOSURE DEVICE FOR CONTACT XEROGRAPHIC COPYING WHEREIN A XEROGRAPHIC PLATE IS HELD IN CONTACT WITH COPY TO BE REPRODUCED WHILE BEING EXPOSED TO LIGHT, SAID DEVICE COMPRISING A CABINET AND A LIGHT SOURCE THEREIN, A RIGID TRANSPARENT PANEL IN A WALL OF THE CABINET AND A COVER MOVABLE OVER SAID PANEL, A RESILIENT, FLEXIBLE, TRANSPARENT PAD POSITIONED ON THE RIGID TRANSPARENT PANEL, AND A THIN, FLEXIBLE, SOFT, TRANSPARENT SHEET SECURED TO THE CABINET AND DISPOSED TO BE DRAWN OVER THE COPY TO BE REPRODUCED AND ADAPTED TO RECEIVE A XEROGRAPHIC PLATE THEREON, AND A PRESSURE PLATE RESILIENTLY MOUNTED WITHIN THE COVER AND POSITIONED OVER THE TRANSPARENT PANEL TO BEAR FIRMLY AGAINST A XEROGRAPHIC PLATE WHEN ON THE TRANSPARENT SHEET WHEREBY THE XEROGRAPHIC PLATE IS FIRMLY AND RESILIENTLY RETAINED IN AN EXPOSURE POSITION.
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) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |