Patent US3619484A successfully refreshed from Google Patents.
US3619484A
Expired / Lapsed
US
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A color facsimile scanning system
Assignee: Panasonic System Solutions Japan Co Ltd
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Filing: 1969-05-20
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Granted: 1971-11-09
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Expires: 1989-05-20
Abstract
Abstract A color facsimile system wherein, in its receiving side, each of the color signals R, G and B (red, green and blue respectively) is received to vary the intensity of a light radiated from a light source depending on the intensity thereof, then, through a circular to linear scanning conversion device employing optical fibers, the above-mentioned light is scanned in a plane scanning system to be recorded on a recording material moving in the direction (an auxiliary scanning direction) perpendicular to the linearly arranged portion of the optical fibers thereby, performing color reproduction through reception scanning by partly overlapping scanning lines two thereof over the other, also having compatibility for receiving black-and-white signals, furthermore comprising a mechanism to hold the recording material at a constant position while the auxiliary scanning is being carried out.
Inventors
- 👤 Yutaka Tanaka
- 👤 Koichi Kobitsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:08
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/12; H04N1/1205; H04N1/024; H04N1/032; H04N1/036; H04N1/46; H04N1/50; H04N1/504
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
267 words
A color facsimile system wherein, in its receiving side, a color filter corresponding to the transmitted signal is rotated in synchronism with the main scanning of the transmitting side in front of a light source radiating a light whose intensity depends upon that of each of the color signals transmitted in line sequence from the transmitting side, thus when an A-signal is transmitted, for example, an A-colored filter within said rotary color filter faces said light beam to color it in A-color, said colored light is led through a circular to linear scanning conversion device made of glass fibers to a linear scanning portion thereof, and the recording material which moves in the direction (an auxiliary scanning direction) perpendIcular to said linear scanning portion is exposed to said colored light thereby reproducing an original color component, characterized in that, when each of the color signals transmitted in line sequence is received and scanned line by line, such a process, that a given portion of the width of the scanning line for a first color signal is scanned so that is is overlapped by a portion of the width of the scanning line for a second color signal and a given portion of the width of the scanning line for a second color signal is scanned so that it is overlapped by a portion of the width of the scanning line for a third color signal, is repeated with the result that each one the scanning lines for the color signals is scanned so that it is overlapped by the scanning lines corresponding to the other color signals.
Claim 2
Dependent Claim
267 words
A color facsimile system wherein, in its receiving side, a color filter corresponding to the transmitted signal is rotated in synchronism with the main scanning of the transmitting side in front of a light source radiating a light whose intensity depends upon that of each of the color signals transmitted in line sequence from the transmitting side, thus when an A-signal is transmitted, for example, an A-colored filter within said rotary color filter faces said light beam to color it in A-color, said colored light is led through a circular to linear scanning conversion device made of glass fibers to a linear scanning portion thereof, and the recording material which moves in the direction (an auxiliary scanning direction) perpendIcular to said linear scanning portion is exposed to said colored light thereby reproducing an original color component, characterized in that, when each of the color signals transmitted in line sequence is received and scanned line by line, such a process, that a given portion of the width of the scanning line for a first color signal is scanned so that is is overlapped by a portion of the width of the scanning line for a second color signal and a given portion of the width of the scanning line for a second color signal is scanned so that it is overlapped by a portion of the width of the scanning line for a third color signal, is repeated with the result that each one the scanning lines for the color signals is scanned so that it is overlapped by the scanning lines corresponding to the other color signals.
Claim 3
Dependent Claim
44 words
A color facsimile system according to claim 1 characterized in that a color signal receiver can also receive black-and-white signals through a mechanical step only to speed up the auxiliary scanning speed until the overlapping within the width of each scanning line is eliminated.
Claim 4
Dependent Claim
288 words
A color facsimile system according to claim 1 wherein a color filter having three colors R (red), G (green) and B (blue) is rotated in synchronism with the main scanning of the transmitting side in front of a light source which radiates a light depending on the intensity of each of the color signals R, G and B transmitted in line sequence from the transmitting side, when R-signal is transmitted, a red filter within said rotary color filter faces said light radiated from said light source to color it in red, said colored light is led through a crank-shaped rotary scanner successively to a circularly arranged portion and then said linearly arranged portion of said optical fibers in said circular to linear scanning conversion device, and said recording material which moves in the direction (the auxiliary scanning direction) perpendicular to said linear scanning portion is exposed to said colored light thereby producing a color reproduction, characterized in that, when each of the color signals transmitted in line sequence is received and scanned line by line, such a process, that a given portion of the width of the scanning line for a first color signal is scanned so that it is overlapped by a portion of the width of the scanning line for a second color signal and a given portion of the width of the scanning line for a second color signal is scanned so that it is overlapped by a portion of the width of the scanning line width for a third color signal, is repeated with the result that each one of the scanning lines for the color signals is scanned so that it is overlapped by the scanning lines corresponding to the other color signals.
Claim 5
Dependent Claim
38 words
A color facsimile system according to claim 3 characterized in that the top surface of said linearly arranged portion of said optical fibers is positioned so as to always press the surface of said recording material slightly upward.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |