Patent US4910552A successfully refreshed from Google Patents.
US4910552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic document feeder for electrophotographic copying machine with a drum for supporting a document
Assignee: Sharp Corp
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Filing: 1989-01-19
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Granted: 1990-03-20
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Expires: 2009-01-19
Abstract
Abstract An electrophotographic copying machine of a type having a drum for supporting a document to be copied therearound and being provided with an automatic document feeder adapted to carry out a preliminary copying operation for testing includes a timer for counting up a predetermined period of time after the completion of preliminary copying, or is alternatively so programmed that a choice can be made after a preliminary copying operation whether a document remaining in the copying position should be ejected. Jamming of documents and injury to the copying machine can be avoided effectively thereby.
Inventors
- 👤 Haruyoshi Migita
- 👤 Hirokazu Matsuura
- 👤 Syogo Iwai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/60; G03G2215/00; G03G2215/00172; G03G2215/00177; G03G2215/00181; G03G2215/00189; G03G2215/00341; G03G2215/0035; G03G2215/00362; G03G2215/00535; G03G2215/00556; G03G2215/00569
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
An electrophotographic copying machine with an automatic document feeder comprising means for selectably entering a preliminary copying operation mode wherein a document is carried to a copying position for a single copying operation and kept at said copying position when said machine is set for single or multiple copying operation, ejecting means for ejecting a document remaining at said copying position, and selecting means for selectably determining whether to validate or to invalidate the operation of said ejecting means when a preliminary copying operation is completed in said preliminary copying operation mode.
Claim 2
Dependent Claim
92 words
An electrophotographic copying machine with an automatic document feeder comprising means for selectably entering a preliminary copying operation mode wherein a document is carried to a copying position for a single copying operation and kept at said copying position when said machine is set for single or multiple copying operation, ejecting means for ejecting a document remaining at said copying position, and selecting means for selectably determining whether to validate or to invalidate the operation of said ejecting means when a preliminary copying operation is completed in said preliminary copying operation mode.
Claim 3
Dependent Claim
30 words
The copying machine of claim 1 further comprising a document drum around which a document to be copied is rotated to reach and to be removed from said copying position.
Claim 4
Dependent Claim
105 words
An electrophotographic copying machine with an automatic document feeder comprising means for selectively entering a preliminary copying operation mode wherein a document is carried to a copying position for a single copying operation and kept at said copying position when said machine is set for single or multiple copying operation, ejecting means for ejecting a document remaining at said copying position, detecting means for detecting the presence of a document at said copying position, and validating means for validating the operation of said ejecting means if said detecting means detects a document at said copying position when power is switched on for said copying machine.
Claim 5
Dependent Claim
105 words
An electrophotographic copying machine with an automatic document feeder comprising means for selectively entering a preliminary copying operation mode wherein a document is carried to a copying position for a single copying operation and kept at said copying position when said machine is set for single or multiple copying operation, ejecting means for ejecting a document remaining at said copying position, detecting means for detecting the presence of a document at said copying position, and validating means for validating the operation of said ejecting means if said detecting means detects a document at said copying position when power is switched on for said copying machine.
Claim 6
Dependent Claim
30 words
The copying machine of claim 3 further comprising a document drum around which a document to be copied is rotated to reach and to be removed from said copying position.
Claim 7
Dependent Claim
121 words
An electrophotographic copying machine with a rotatable drum and an automatic document feeder comprising means for selectively entering a preliminary copying operation mode wherein a document is transported on and around said drum to a copying position on said drum for a single copying operation and kept at said copying position when said machine is set for single or multiple copying operation, ejecting means for ejecting a document remaining at said copying position, a timer means adapted to start after the completion of said preliminary copying operation mode and to be reset when a subsequent operation is set and inputted, and validating means for validating the operation of said ejecting means when said timer means has counted a predetermined time period.
Claim 8
Dependent Claim
121 words
An electrophotographic copying machine with a rotatable drum and an automatic document feeder comprising means for selectively entering a preliminary copying operation mode wherein a document is transported on and around said drum to a copying position on said drum for a single copying operation and kept at said copying position when said machine is set for single or multiple copying operation, ejecting means for ejecting a document remaining at said copying position, a timer means adapted to start after the completion of said preliminary copying operation mode and to be reset when a subsequent operation is set and inputted, and validating means for validating the operation of said ejecting means when said timer means has counted a predetermined time period.
Claim 9
Dependent Claim
30 words
The copying machine of claim 5 further comprising a document drum around which a document to be copied is rotated to reach and to be removed from said copying position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |