Patent US5465135A successfully refreshed from Google Patents.
US5465135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charger control in an electrophotographic copying apparatus
Assignee: Konica Minolta Inc
•
Filing: 1994-03-11
•
Granted: 1995-11-07
•
Expires: 2014-03-11
Abstract
Abstract An electrophotographic copying apparatus including a time counter to count a time during which transfer sheets are left in a stacker; a memory to store an output value of a humidity detector; a calculator to calculate a correction value for each transfer sheet in accordance with the output value of the humidity detector and the time counted by the time counter; and a controller to control a corona discharging output for each transfer sheet in accordance with the correction value.
Inventors
- 👤 Kiyohari Nakagama
- 👤 Kazuhiro Nakazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:13
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/1645
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
An electrophotographic copying apparatus, comprising: an electric power source to supply a corona discharging output to an electrode; stack means on which transfer sheets to be fed are stacked; a time counter to count a time during which the transfer sheets are left in the stack means; means for storing an output value of a humidity detector; a calculator to calculate a correction value for each transfer sheet in accordance with the output value of the humidity detector and the time counted by the time counter; and control means for controlling the corona discharging output for each transfer sheet in accordance with the correction value.
Claim 2
Dependent Claim
105 words
An electrophotographic copying apparatus, comprising: an electric power source to supply a corona discharging output to an electrode; stack means on which transfer sheets to be fed are stacked; a time counter to count a time during which the transfer sheets are left in the stack means; means for storing an output value of a humidity detector; a calculator to calculate a correction value for each transfer sheet in accordance with the output value of the humidity detector and the time counted by the time counter; and control means for controlling the corona discharging output for each transfer sheet in accordance with the correction value.
Claim 3
Dependent Claim
24 words
The electrophotographic copying apparatus of claim 1, wherein the calculator calculates the correction value in accordance with the stacked order of each transfer sheet.
Claim 4
Dependent Claim
51 words
The electrophotographic copying apparatus of claim 1, further comprising: detecting means for detecting a mounting or dismounting of the stack means and for outputting a dismount signal to indicate the dismounting of the stack means; and means for resetting the counting of the time counter in response to the dismount signal.
Claim 5
Dependent Claim
35 words
The electrophotographic copying apparatus of claim 3, wherein, when the stack means is mounted again within a given time after the stack means has been dismounted, the detecting means does not output the dismount signal.
Claim 6
Dependent Claim
54 words
The electrophotographic copying apparatus of claim 1, further comprising: sheet detection means for detecting the presence or absence of the sheet on the stack means and for outputting a no-sheet signal when detecting the absence of the sheet; and means for resetting the counting of the time counter in response to the no-sheet signal.
Claim 7
Dependent Claim
52 words
The electrophotographic copying apparatus of claim 1, further comprising means for determining a moisture-absorbing state or a moisture-releasing state of the transfer sheets from the output value of the humidity detector; and means for changing a calculation method of the calculation means in accordance with a determination result of the determining means.
Claim 8
Dependent Claim
47 words
The electrophotographic copying apparatus of claim 6, wherein the determining means determines the moisture-absorbing state or the moisture-releasing state of the transfer sheets from the output values of the humidity detector during times that the main power source of the electrophotographic copying apparatus is ON and OFF.
Claim 9
Dependent Claim
14 words
The electrophotographic copying apparatus of claim 1, wherein the electrode comprises a transfer electrode.
Claim 10
Dependent Claim
14 words
The electrophotographic copying apparatus of claim 1, wherein the electrode comprises a separation electrode.
References Cited (Backward Citations)
US3950680A
Cited
US4134147A
Cited
JPS5528081A
Cited
DE3144172A1
Cited
US4420246A
Cited
US4589765A
Cited
JPS6247060A
Cited
US5029314A
Cited
US5142332A
Cited
EP0415754A1
Cited
US5313308A
Cited
US5182603A
Cited
JPH04190381A
Cited
US5198864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-11-06 | 1999-05-08 | 1999-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-06 | 2003-05-08 | 2003-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-06 | 2007-05-08 | 2007-11-07 | $7700.00 | Window Closed / Lapsed |