Patent US4420247A successfully refreshed from Google Patents.
US4420247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer control means for an electrostatic recording apparatus
Assignee: Canon Inc
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Filing: 1980-12-23
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Granted: 1983-12-13
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Expires: 2000-12-23
Abstract
Abstract A surface potential measuring meter and an electrostatic recording apparatus are disclosed. The surface potential measuring meter detects the surface potential on an object to be measured as AC signal. The electrostatic recording apparatus is provided with the surface potential measuring meter to measure the surface potential of an electrostatic latent image formed on a recording medium in the apparatus. The outputs from the meter are used to control various conditions for forming images with the apparatus.
Inventors
- 👤 Koji Suzuki
- 👤 Joji Nakahira
- 👤 Koki Kuroda
- 👤 Nao Nagashima
- 👤 Yoshiaki Takayanagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:03
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5033; G03G15/5037; G03G15/02; G03G15/0266; G03G21/00; G03G21/14
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
61 words
A recording apparatus comprising: a plurality of processing means for forming an image on the recording medium; a digital computer for providing controlling data to at least one of said processing means; and signal generating means for generating a signal for blocking a controlling data output to one of said processing means at a time of initialization of said digital computer.
Claim 2
Dependent Claim
61 words
A recording apparatus comprising: a plurality of processing means for forming an image on the recording medium; a digital computer for providing controlling data to at least one of said processing means; and signal generating means for generating a signal for blocking a controlling data output to one of said processing means at a time of initialization of said digital computer.
Claim 3
Dependent Claim
32 words
An electrostatic recording apparatus according to claim 1, wherein said signal generating means is a digital computer for sequence control which stores a program for sequence control of said electrostatic recording apparatus.
Claim 4
Dependent Claim
26 words
An electrostatic recording apparatus according to claim 2, wherein said initialization is carried out in accordance with a signal from said digital computer for sequence control.
Claim 5
Dependent Claim
99 words
An electrostatic recording apparatus comprising: a plurality of processing means including means for charging a recording medium with electric charge for forming an image on the recording medium; a digital computer for providing controlling data to said processing means; and blocking means for blocking said controlling data output to one of said processing means at a time of initialization of said digital computer; wherein said charging means comprises a high voltage transformer for boosting an input voltage and said blocking means comprises a clamp circuit for clamping the input voltage to said high voltage transformer at a low voltage.
Claim 6
Dependent Claim
99 words
An electrostatic recording apparatus comprising: a plurality of processing means including means for charging a recording medium with electric charge for forming an image on the recording medium; a digital computer for providing controlling data to said processing means; and blocking means for blocking said controlling data output to one of said processing means at a time of initialization of said digital computer; wherein said charging means comprises a high voltage transformer for boosting an input voltage and said blocking means comprises a clamp circuit for clamping the input voltage to said high voltage transformer at a low voltage.
Claim 7
Dependent Claim
90 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium, a first digital computer for providing controlling data to at least one of said processing means, a second digital computer having a program stored therein for sequence control of said electrostatic recording apparatus, and blocking means for blocking said controlling data output to one of said processing means at a time of initialization of said first digital computer, wherein said blocking means is actuated by an output signal from said second digital computer.
Claim 8
Dependent Claim
90 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium, a first digital computer for providing controlling data to at least one of said processing means, a second digital computer having a program stored therein for sequence control of said electrostatic recording apparatus, and blocking means for blocking said controlling data output to one of said processing means at a time of initialization of said first digital computer, wherein said blocking means is actuated by an output signal from said second digital computer.
Claim 9
Dependent Claim
92 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium, control means for providing a controlling output to said processing means in analog form, wherein said control means comprises a digital computer, and a digital-to-analog converter to convert a digital output of said digital computer to an analog value, wherein said controlling output to said processing means, associated with said digital-to-analog converter, is blocked at a time of initialization of said apparatus according to a specific signal different from the signal from said digital computer.
Claim 10
Dependent Claim
92 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium, control means for providing a controlling output to said processing means in analog form, wherein said control means comprises a digital computer, and a digital-to-analog converter to convert a digital output of said digital computer to an analog value, wherein said controlling output to said processing means, associated with said digital-to-analog converter, is blocked at a time of initialization of said apparatus according to a specific signal different from the signal from said digital computer.
Claim 11
Dependent Claim
21 words
A recording apparatus according to claim 6, wherein said specific signal is a signal from said digital computer for sequence control.
Claim 12
Dependent Claim
78 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium, detecting means for detecting an image forming condition in the apparatus, a first digital computer for controlling at least one of said processing means in accordance with the detection value of said detecting means to form a high quality image, and a second digital computer for controlling said first digital computer to control said processing means to provide a predetermined timing.
Claim 13
Dependent Claim
78 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium, detecting means for detecting an image forming condition in the apparatus, a first digital computer for controlling at least one of said processing means in accordance with the detection value of said detecting means to form a high quality image, and a second digital computer for controlling said first digital computer to control said processing means to provide a predetermined timing.
Claim 14
Dependent Claim
61 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium; a first digital computer for controlling at least one of said processing means; and a second digital computer for transferring data for image formation to said first digital computer wherein said first digital computer is initialized by a signal from said second digital computer.
Claim 15
Dependent Claim
61 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium; a first digital computer for controlling at least one of said processing means; and a second digital computer for transferring data for image formation to said first digital computer wherein said first digital computer is initialized by a signal from said second digital computer.
Claim 16
Dependent Claim
71 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium; a first digital computer for controlling at least one of said processing means; and a second digital computer for transferring data for image formation to said first digital computer wherein said second digital computer blocks a controlling data output to one of said processing means at the time when the image formation is impossible.
Claim 17
Dependent Claim
71 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium; a first digital computer for controlling at least one of said processing means; and a second digital computer for transferring data for image formation to said first digital computer wherein said second digital computer blocks a controlling data output to one of said processing means at the time when the image formation is impossible.
Claim 18
Dependent Claim
81 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium, said processing means includes an electric charger for charging a recording medium; a first digital computer for controlling at least one of said processing means; and a second digital computer for transferring data for image formation to said first digital computer wherein said second digital computer blocks a controlling data output to said electrical charger at the time when the image formation is impossible.
Claim 19
Dependent Claim
81 words
A recording apparatus comprising: a plurality of processing means for forming an image on a recording medium, said processing means includes an electric charger for charging a recording medium; a first digital computer for controlling at least one of said processing means; and a second digital computer for transferring data for image formation to said first digital computer wherein said second digital computer blocks a controlling data output to said electrical charger at the time when the image formation is impossible.
References Cited (Backward Citations)
US3914047A
Cited
US4306803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |