US4687320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for a copier
Assignee: Sharp Corp
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Filing: 1986-01-13
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Granted: 1987-08-18
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Expires: 2006-01-13
Abstract
Abstract A control system for an electrophotographic copier includes a detector switch for outputting a warning signal when it detects that a container for discarded toner for the copier becomes full and a device for stopping the copying operation only after a specified number of copies are produced after the container became full and the aforementioned warning signal has been outputted.
Inventors
- 👤 Yasushi Nakanishi
- 👤 Akihiko Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:19
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G21/00; G03G21/10; G03G21/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A control system for an electrophotographic copier comprising a detecting means for detecting that a container for discarded toner became full, and a stopping means for stopping preparations for the operation of said copier after a selectably specified number of copies are produced by said copier after said detecting means detects that said container became full.
Claim 2
Dependent Claim
56 words
A control system for an electrophotographic copier comprising a detecting means for detecting that a container for discarded toner became full, and a stopping means for stopping preparations for the operation of said copier after a selectably specified number of copies are produced by said copier after said detecting means detects that said container became full.
Claim 3
Dependent Claim
31 words
The control system of claim 1 wherein said specified number is equal to the remaining number of copies to be made in a continuous copying mode of operation of said copier.
Claim 4
Dependent Claim
29 words
The control system of claim 1 wherein said stopping means serves to stop the operation of said copier by disconnecting a power source from AC loads of said copier.
Claim 5
Dependent Claim
29 words
The control system of claim 2 wherein said stopping means serves to stop the operation of said copier by disconnecting a power source from AC loads of said copier.
Claim 6
Dependent Claim
28 words
The control system of claim 3 wherein said stopping means stops the operation of said copier by opening a power relay connected in series to said power source.
Claim 7
Dependent Claim
28 words
The control system of claim 4 wherein said stopping means stops the operation of said copier by opening a power relay connected in series to said power source.
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) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |