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
•
Filing: 1989-01-19
•
Granted: 1990-03-20
•
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 22:53
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.
References Cited (Backward Citations)
US3936180A
Cited
US3972522A
Cited
US4281919A
Cited
US4448515A
Cited
US4620782A
Cited
US4657375A
Cited
US4803519A
Cited
US4634113A
Cited
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 |