US4523234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning control apparatus and method therefor
Assignee: Toshiba Corp
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Filing: 1983-05-24
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Granted: 1985-06-11
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Expires: 2003-05-24
Abstract
Abstract A scanning control apparatus includes motor driving circuits and a control circuit. The motor driving circuit drives a motor in a backward direction for a predetermined time counted by a counter. Then, the motor driving circuit drives the motor in a forward direction until the forward velocity of the motor becomes constant before enabling the output from a line scanner.
Inventors
- 👤 Akio Sangu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:54
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/047; H04N1/0473; H04N1/12; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N2201/00; H04N2201/04; H04N2201/047; H04N2201/04701; H04N2201/0471; H04N2201/04715; H04N2201/04724; H04N2201/04725; H04N2201/04734; H04N2201/04753; H04N2201/04756; H04N2201/04758; H04N2201/04767; H04N2201/04781; H04N2201/04786
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A scanning control means, comprising: a. scanning means for line-scanning an object; b. feeding means for feeding the object in a direction perpendicular to a direction of the line-scanning; c. driving means for selectively driving said feeding means in a forward direction or a backward direction; and d. control means for controlling said driving means and said scanning means such that said driving means drives said feeding means in a backward direction for a predetermined time after the apparatus is started, and then drives said feeding means in a forward direction until the forward velocity becomes constant before said scanning means produces scanned data.
Claim 2
Dependent Claim
104 words
A scanning control means, comprising: a. scanning means for line-scanning an object; b. feeding means for feeding the object in a direction perpendicular to a direction of the line-scanning; c. driving means for selectively driving said feeding means in a forward direction or a backward direction; and d. control means for controlling said driving means and said scanning means such that said driving means drives said feeding means in a backward direction for a predetermined time after the apparatus is started, and then drives said feeding means in a forward direction until the forward velocity becomes constant before said scanning means produces scanned data.
Claim 3
Dependent Claim
15 words
A scanning control means according to claim 1, wherein said control means comprises a microcomputer.
Claim 4
Dependent Claim
53 words
A scanning control means according to claim 1, wherein said control means includes: a first time-counting means for counting the predetermined time of the feeding means being fed in the backward direction; and a second time-counting means for counting a time necessary for the forward velocity of said feeding means to become constant.
Claim 5
Dependent Claim
16 words
A scanning control means according to claim 1, wherein said feeding means includes a reversible motor.
Claim 6
Dependent Claim
74 words
A scanning control means according to claim 4, wherein said control means includes: a shaft encoder for measuring the rotation of said motor; a phase discriminator for discriminating the phase of the signal from said shaft encoder; first counter for counting the output from said phase discriminator when said motor rotates in a forward direction; and second counter for counting the output from said phase discriminator when said motor rotates in a backward direction.
Claim 7
Dependent Claim
16 words
A scanning control means according to claim 1, wherein said feeding means includes a pulse motor.
Claim 8
Dependent Claim
37 words
A scanning control means according to claim 6, further comprising: a first counter for counting forward-rotation pulses to be fed to said motor; and a second counter for counting backward-rotation pulses to be fed to said motor.
Claim 9
Dependent Claim
88 words
A scanning control method wherein a main scanning of an object is performed by a line scanner and a sub-scanning is performed by feeding the object in a direction perpendicular to a direction of the main scanning to obtain picture signals from the line scanner, comprising the steps of: a. feeding the object in a backward direction for a predetermined time after power is ON; b. feeding the object in a forward direction until the forward velocity becomes constant; and c. enabling the output from the line scanner.
Claim 10
Dependent Claim
88 words
A scanning control method wherein a main scanning of an object is performed by a line scanner and a sub-scanning is performed by feeding the object in a direction perpendicular to a direction of the main scanning to obtain picture signals from the line scanner, comprising the steps of: a. feeding the object in a backward direction for a predetermined time after power is ON; b. feeding the object in a forward direction until the forward velocity becomes constant; and c. enabling the output from the line scanner.
References Cited (Backward Citations)
US4367493A
Cited
US4424535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |