Patent US4235550A successfully refreshed from Google Patents.
US4235550A
Expired / Lapsed
US
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Automatic document handler control
Assignee: Xerox Corp
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Filing: 1979-05-18
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Granted: 1980-11-25
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Expires: 1999-05-18
Abstract
Abstract A reproduction machine having a removable automatic document handler for circulating documents to be copied onto the platen of the reproduction machine. Control members independent from the control circuits of the reproduction machine are provided for the automatic document handler to cycle the reproduction machine and the automatic document handler in response to the illumination produced during exposure of the documents on the platen.
Inventors
- 👤 Raymond D. Case
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:22
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/60; G03G2215/00; G03G2215/00172; G03G2215/00177; G03G2215/00181; G03G2215/00185
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
60 words
An automatic document handler control system for use on a reproduction machine having an exposure station whereat the documents to be copied are exposed by a suitable light source comprising; exposure sensing means adapted to provide a control signal in response to each exposure illumination, and means, responsive to said signal, for controlling the operation of the automatic document handler.
Claim 2
Dependent Claim
60 words
An automatic document handler control system for use on a reproduction machine having an exposure station whereat the documents to be copied are exposed by a suitable light source comprising; exposure sensing means adapted to provide a control signal in response to each exposure illumination, and means, responsive to said signal, for controlling the operation of the automatic document handler.
Claim 3
Dependent Claim
120 words
A control system according to claim 1 wherein said signal responsive means includes a cycle out timer adjustable to a time period slightly longer than the normal time period between successive exposures of the reproduction machine when the machine is making multiple copies of a document, said timer being adapted upon cycle out, to provide a signal to activate the document handler to feed another document to the exposure platen and to indirectly activate the reproduction machine to copy another document, the control signal from said exposure sensing means causing said timer to be reset before said timer cycles out, thereby preventing activation of the document handler to allow production of multiple copies of the document on the exposure platen.
Claim 4
Dependent Claim
24 words
A control system according to claim 2, wherein said control system further includes a start switch adapted for initial activation of the document handler.
Claim 5
Dependent Claim
34 words
An automatic document handler control system according to claim 1 wherein said exposure sensing means comprises a photodetector mounted in the document handler in a position to detect the light from the exposure illumination.
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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |