Patent EP0259839A2 successfully refreshed from Google Patents.
EP0259839A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Control unit of copying machines
Assignee: Fujifilm Business Innovation Corp
•
Filing: 1987-09-08
•
Granted: —
•
Expires: 2007-09-08
Abstract
Abstract A control unit of a copying machine, comprising: an optical scanning mechanism for scanning a manuscript (6) surface having a picture image; photosensitive substance (1) rotating synchronously with scanning of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means (5C, 5Y, 5M) for developing said electrostatic latent image; first reference signal generating means (27) for generating a first reference signal representing a rotational reference position of said photosensitive substance (1) rotated synchronously with the rotation of said photosensitive substance; first control means (23) for controlling a rotational position of said photosensitive substance according to said reference signal generated from said reference signal generating means; transfer means (6) for transferring an image developed through said developing means to a recording paper; second reference (27) signal generating means for generating a second reference signal representing a reference for a forming initiation position of said electrostatic latent image; third reference (27) signal generating means for generating a third reference signal representing a reference for a transfer initiation position synchronously with the transfer operation of said transfer means; and timing signal generating means for generating timing signals representing a grip timing for the recording paper synchronously with the transfer operation of said transfer means.
Inventors
- 👤 Masaaki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/01; G03G15/0142; G03G15/0147; G03G15/0152; G03G15/0163; G03G21/00; G03G21/14; G03G21/145
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
200 words
A control unit of a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with scanning of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; first reference signal generating means for generating a first reference signal representing a rotational reference position of said photosensitive substance rotated synchronously with the rotation of said photosensitive substance; first control means for controlling a rotational position of said photosensitive substance according to said reference signal generated from said reference signal generating means; transfer means for transferring an image developed through said developing means to a recording paper; second reference signal generating means for generating a second reference signal representing a reference for a forming initiation position of said electrostatic latent image; third reference signal generating means for generating a third reference signal representing a reference for a transfer initiation position synchronously with the transfer operation of said transfer means; and timing signal generating means for generating timing signals representing a grip timing for the recording paper synchronously with the transfer operation of said transfer means.
Claim 2
Dependent Claim
200 words
A control unit of a copying machine, comprising: an optical scanning mechanism for scanning a manuscript surface having a picture image; a photosensitive substance rotating synchronously with scanning of said optical scanning mechanism, on which an electrostatic latent image corresponding to said picture image is formed; developing means for developing said electrostatic latent image; first reference signal generating means for generating a first reference signal representing a rotational reference position of said photosensitive substance rotated synchronously with the rotation of said photosensitive substance; first control means for controlling a rotational position of said photosensitive substance according to said reference signal generated from said reference signal generating means; transfer means for transferring an image developed through said developing means to a recording paper; second reference signal generating means for generating a second reference signal representing a reference for a forming initiation position of said electrostatic latent image; third reference signal generating means for generating a third reference signal representing a reference for a transfer initiation position synchronously with the transfer operation of said transfer means; and timing signal generating means for generating timing signals representing a grip timing for the recording paper synchronously with the transfer operation of said transfer means.
Claim 3
Dependent Claim
64 words
A control unit as claimed in claim 1, further comprising: measuring means for measuring a time interval of the first reference signal generated from said first reference signal generating means; and second control means for discriminating whether the measured time interval falls within a allowable range or not, and for stopping the copy operation if said time interval is out of the allowable range.
Claim 4
Dependent Claim
99 words
A control unit as claimed in claim 2, wherein said second control means comprises means for detecting whether the time interval measured by said measuring means exceeds a predetermined maximum value or not, means for detecting whether the time interval measured by said measuring means is less than a predetermined minimum value or not, means for stopping the copy operation judging that an abnormal matter has occurred when the time interval measured by said measuring means is either over the predetermined maximum value or below the predetermined minimum value, and means for displaying that the abnormal matter has occurred.
Claim 5
Dependent Claim
52 words
A control unit as claimed in claim 1, further comprising control means for controlling a positional relationship between said photosensitive substance and said transfer means with a predetermined relationship by employing said second and third reference signals and said timing signal before the initiation or after the termination of a copying cycle.
Claim 6
Dependent Claim
78 words
A control unit as claimed in claim 1, further comprising: a pulse generating means for generating a pulse signal having a predetermined frequency; counting means for counting pulse signals generated by said pulse generating means from a picture image scanning termination point of said optical scanning mechanism; and third control means for shutting down emergently the copying operation in case the copying operation is not terminated when the value counted by said counting means reaches a predetermined value.
Claim 7
Dependent Claim
159 words
A control unit as claimed in claim 1, further comprising: switching means disposed at a predetermined distance from the stop position of said optical scanning mechanism toward the canning direction of said picture image and being operable every time said optical scanning mechanism reciprocates for scanning said picture image; fourth reference signal generating means being coupled with a rotation shaft of a motor which drives said optical scanning mechanism for generating a fourth reference signal between the operation position of said switching means and said stop position thereof; pulse generating means being coupled with the rotation shaft of the motor for generating pulses at every predetermined rotation angle; measuring means for measuring the time interval from the operation timing of said switching means to the generation timing of said fourth reference signal by counting said pulses; and fourth control means for controlling the stop position of said optical scanning mechanism according to the measured value of said measuring means.
Claim 8
Dependent Claim
170 words
A control unit as claimed in claim 1, further comprising: switching means disposed at a predetermined distance from the stop position of said optical scanning mechanism toward the scanning direction of the manuscript picture image, and being operable every time said optical scanning mechanism reciprocates for scanning said picture image; fifth reference signal generating means coupled with the rotation shaft of a motor for driving said optical scanning mechanism, for generating a fifth reference signal between the operating position of said switching means and said stop position; pulse generating means coupled with the rotation shaft of the motor for generating pulses at every predetermined rotation angle; measuring means for measuring the time interval from the operation timing of said switching means to the generation timing of said reference signal by counting said pulses; and fifth control means for executing emergency shut down of the copying operation when a measured value of said measuring means does not fall within a predetermined range at the starting time of said optical scanning mechanism.
Claim 9
Dependent Claim
163 words
A control unit as claimed in claim 1, further comprising: switching means disposed at a predetermined distance from the stop position of said optical scanning mechanism toward the scanning direction of the picture image, and being operable every time said optical scanning mechanism reciprocates for scanning the picture image; sixth reference signal generating means coupled with the rotation shaft of a motor for driving said optical scanning mechanism, for generating a sixth reference signal between the operating position of said switching means and said stop position; pulse generating means coupled with the rotation shaft of the motor for driving said optical scanning mechanism, for generating pulses at every predetermined rotation angel; measuring means for measuring the time interval from the operation timing of said sixth switching means to the generation timing of said sixth reference signal by counting said pulses; and sixth control means for controlling the stop position of said optical scanning mechanism according to the measured value of said measuring means.
Claim 10
Dependent Claim
45 words
A control unit as claimed in claim 1, further comprising: seventh control means for starting said optical scanning mechanism when the rotation angle of the photosensitive substance reaches a predetermined angle according to the first reference signal generated from said first reference signal generating means.
Claim 11
Dependent Claim
78 words
A control unit as claimed in claim 1, in which each control means for controlling each of said optical scanning mechanism, said photosensitive substance and said transfer means, is provided with; a copy mode which controls a series of copying processes by controlling each of said optical scanning mechanism, said photosensitive substance and said transfer means; and a diagnosis mode for making a diagnosis of each of said optical scanning mechanism, said photosensitive substance and said transfer means.
Claim 12
Dependent Claim
94 words
A control unit as claimed in claim 1, further comprising: pulse generating means for generating a pulse signal corresponding to a grip timing of a transfer paper synchronously with the rotation of said transfer means; measuring means for measuring the synchronous relationship between said third reference signal and said pulse signal and the time interval of said third reference signal; and control means for discriminating whether the measured synchronous relationship and time interval fall within the specified range or not, and for stopping the copying operation in case of out of the specified range.
References Cited (Backward Citations)
JPS60218673A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.