US4420761A
Expired / Lapsed
US
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Scanning recording apparatus
Assignee: Canon Inc
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Filing: 1982-05-25
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Granted: 1983-12-13
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Expires: 2002-05-25
Abstract
Abstract A recording apparatus for image recording by scanning having plural dots arranged inclined to the scanning direction, wherein the phase difference of the plural dots in the scanning direction is compensated by control signals generated by an oscillator.
Inventors
- 👤 Takashi Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:20
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/1911; H04N1/1912; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1238; G06K15/1257; G06K15/1261; G06K2215/00; G06K2215/111
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
67 words
A scanning recording apparatus, comprising: recording means for forming plural dots in the subsidiary scanning direction; clock generator means for generating a clock signal; and control means for forming, from the clock signal generated by said clock generator means, plural reference signals having the same frequency but a different phase from that of the clock signal, and for controlling said recording means by the plural reference signals.
Claim 2
Dependent Claim
67 words
A scanning recording apparatus, comprising: recording means for forming plural dots in the subsidiary scanning direction; clock generator means for generating a clock signal; and control means for forming, from the clock signal generated by said clock generator means, plural reference signals having the same frequency but a different phase from that of the clock signal, and for controlling said recording means by the plural reference signals.
Claim 3
Dependent Claim
34 words
A scanning recording apparatus according to claim 1, further comprising phase shifting means for adjusting the phase of the clock signal generated by said clock generator means in order to form plural reference signals.
Claim 4
Dependent Claim
26 words
A scanning recording apparatus according to claim 2, wherein said phase shifting means includes an integrating circuit having of resistors, condensers and a Schmidt trigger circuit.
Claim 5
Dependent Claim
23 words
A scanning recording apparatus according to claim 2, further comprising signal forming means for forming an enabling signal for enabling said recording means.
Claim 6
Dependent Claim
56 words
A scanning recording apparatus according to claim 4, further comprising synchronizing signal forming means for forming plural synchronizing signals delayed by determined periods from the enabling signal formed by said signal forming means, wherein said control means is adapted to control said recording means in response to said plural reference signals and said plural synchronizing signals.
Claim 7
Dependent Claim
18 words
A scanning recording apparatus according to claim 5, wherein said synchronizing signal forming means includes a delay circuit.
Claim 8
Dependent Claim
25 words
A scanning recording apparatus according to claim 5, wherein said control means includes gate circuits for receiving said plural reference signals and delayed synchronizing signals.
Claim 9
Dependent Claim
35 words
A scanning recording apparatus according to claim 7, wherein said control means includes memory means from which information for controlling said recording means is read in response to the output signal from said gate circuits.
Claim 10
Dependent Claim
99 words
A scanning recording apparatus, comprising: recording means for forming plural dots in the subsidiary scanning direction; clock generator means for generating a clock signal; reference signal generator means for forming, from the clock signal generated by said clock generator means, plural reference signals having the same frequency but a different phase from that of the clock signal; synchronizing signal forming means for forming the plural synchronizing signals with the period of a half clock interval preceding said reference signals; and control means for enabling said recording means in response to said plural reference signals and said plural synchronizing signals.
Claim 11
Dependent Claim
99 words
A scanning recording apparatus, comprising: recording means for forming plural dots in the subsidiary scanning direction; clock generator means for generating a clock signal; reference signal generator means for forming, from the clock signal generated by said clock generator means, plural reference signals having the same frequency but a different phase from that of the clock signal; synchronizing signal forming means for forming the plural synchronizing signals with the period of a half clock interval preceding said reference signals; and control means for enabling said recording means in response to said plural reference signals and said plural synchronizing signals.
Claim 12
Dependent Claim
40 words
A scanning recording apparatus according to claim 9, wherein said reference signal generator means comprises phase shifting means for adjusting the phase of the clock signal generated by said clock generator means in order to form said plural reference signals.
Claim 13
Dependent Claim
27 words
A scanning recording apparatus according to claim 10, wherein said phase shifting means comprises an integrating circuit composed of resistors and condensers and a Schmidt trigger circuit.
Claim 14
Dependent Claim
18 words
A scanning recording apparatus according to claim 9, wherein said synchronizing signal forming means comprises a delay circuit.
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) | 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 |