Patent US4788575A successfully refreshed from Google Patents.
US4788575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying machine for detecting a workable document turnover unit
Assignee: Minolta Co Ltd
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Filing: 1987-01-28
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Granted: 1988-11-29
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Expires: 2007-01-28
Abstract
Abstract A copying machine having a function of prohibiting the operation of an automatic document take-up unit. This copying machine includes an automatic document take-up unit and a document feeder for feeding a document, a document turnover unit for turning over the document for copying of both sides of the document, a designating unit for designating a copy side, a detecting unit for detecting whether the document turnover unit is attached or not, and a prohibiting unit for prohibiting the automatic document take-up unit from operation in case the document turnover unit is not attached.
Inventors
- 👤 Masazumi Ito
- 👤 Syuji Maruta
- 👤 Tadashi Ohira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:25
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/60; G03G15/22; G03G15/23; G03G2215/00; G03G2215/00172; G03G2215/00177; G03G2215/00181; G03G2215/00185
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
148 words
A copying machine comprising: a copying machine body having a glass plate on which a document to be copied is placed; document feeding means for automatically forwarding said document to said glass plate; document turnover means for turning over from one side to another side a document discharged from said document feeding means and sending said document back to said document feeding means; copy side designating means selectively designating a two-sided copy mode by which both sides of said document are copied; an attachment detecting means for detecting whether said document turnover means is attached to said copying machine body in a state ready to be used; prohibiting means for inhibiting the use of said document feeding means when said two-sided copy mode is designated by said copy side designating means and said document turnover means is detected by said detecting means as not ready to be used.
Claim 2
Dependent Claim
148 words
A copying machine comprising: a copying machine body having a glass plate on which a document to be copied is placed; document feeding means for automatically forwarding said document to said glass plate; document turnover means for turning over from one side to another side a document discharged from said document feeding means and sending said document back to said document feeding means; copy side designating means selectively designating a two-sided copy mode by which both sides of said document are copied; an attachment detecting means for detecting whether said document turnover means is attached to said copying machine body in a state ready to be used; prohibiting means for inhibiting the use of said document feeding means when said two-sided copy mode is designated by said copy side designating means and said document turnover means is detected by said detecting means as not ready to be used.
Claim 3
Dependent Claim
16 words
The copying machine as claimed in claim 1, wherein said prohibiting means is a display means.
Claim 4
Dependent Claim
23 words
The copying machine as claimed in claim 1, wherein said prohibiting means is means for prohibiting the drive of said document feeding means.
Claim 5
Dependent Claim
169 words
A copying machine comprising: a copying machine body having a glass plate on which a document to be copied is placed; document feeding means for automatically forwarding said document to said glass plate; image forming means for forming an image of said document on copy paper provided within said copying machine body; document turnover means detachably attached to said copying machine body, which turns over from one side to another side said document discharged from said document feeding means and sends said document back to said document feeding means; copy side designating means selectively designating a two-sided copy mode by which both sides of said document are copied; an attachment detecting means for detecting whether said document turnover means is attached to said copying machine body; prohibiting means for inhibiting the use of said document feeding means when said two-sided copy mode is designated by said copy side designating means and said document turnover means is detected by said detecting means as not attached to said copying machine body.
Claim 6
Dependent Claim
169 words
A copying machine comprising: a copying machine body having a glass plate on which a document to be copied is placed; document feeding means for automatically forwarding said document to said glass plate; image forming means for forming an image of said document on copy paper provided within said copying machine body; document turnover means detachably attached to said copying machine body, which turns over from one side to another side said document discharged from said document feeding means and sends said document back to said document feeding means; copy side designating means selectively designating a two-sided copy mode by which both sides of said document are copied; an attachment detecting means for detecting whether said document turnover means is attached to said copying machine body; prohibiting means for inhibiting the use of said document feeding means when said two-sided copy mode is designated by said copy side designating means and said document turnover means is detected by said detecting means as not attached to said copying machine body.
Claim 7
Dependent Claim
16 words
The copying machine as claimed in claim 4, wherein said prohibiting means is a display means.
Claim 8
Dependent Claim
23 words
The copying machine as claimed in claim 4, wherein said prohibiting means is means for prohibiting the drive of said document feeding means.
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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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |