Patent US2290590A successfully refreshed from Google Patents.
US3585296A
Expired / Lapsed
US
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Synchronized reciprocating lens photocomposer
Assignee: International Business Machines Corp
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Filing: 1969-10-28
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Granted: 1971-06-15
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Expires: 1989-10-28
Abstract
Abstract A photocomposing apparatus forms patterns of images, such as alphameric characters, on a radiation sensitive record receiver or film by directing radiation from a cathode-ray tube screen to the radiation sensitive record receiver. The beam of the cathoderay tube is controlled so that the beam moves in a single vertical trace, and the beam is blanked or unblanked under control of electrical signals, so that successive scans of radiation from said screen will form a pattern of an image when successive scans move across the film. A lens or other refractive member in front of the screen directs the radiation to the record receiver and a motor drives the lens at uniform speed to move the successive scans across the record receiver, thus forming the pattern of one or more images across the film. The sweep of the beam of the cathode-ray tube is altered in length to conform to the size of the images, i.e., characters, and may be of two different lengths, for smaller and larger characters. To avoid pincushion distortion, the trace of the sweep of the beam is centered by biasing the beam in accordance with the length of the sweep. The speed of the motor is decreased with increase in the length of the sweep of the beam to maintain the same quality of reproduction. At the end of each line, the motor decelerates at a rate to stop the lens in the same position for any speed.
Inventors
- 👤 Clifton Van Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:39
CPC Classifications
B; B41; B41B; B41B19/00; B41B19/01; B41B27/00; B41B27/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
182 words
A photocomposing apparatus for forming a pattern of images on a radiation sensitive record receiver from radiation produced by the screen of a cathode-ray tube and directed to scan said record receiver in successive scans, comprising a cathode-ray tube controlled to sweep the beam successively along a single trace on said screen to form successive scans, means to blank and unblank said beam to produce radiation from the unblank segments of successive scans, radiation directing means in the path of said radiation to direct said radiation to said record receiver, said radiation directing means and said record receiver being relatively movable so that successive scans of said radiation move across said record receiver transversely of the said scans, driving means to produce relative movement of said radiation directing means and said record receiver, and adjustable control means including means operable conjointly to adjust the length of the sweep of said beam to conform to dimensions of images of different sizes, and to decrease or increase the speed of said driving means with increase or decrease in the length of said sweep, respectively.
Claim 2
Dependent Claim
182 words
A photocomposing apparatus for forming a pattern of images on a radiation sensitive record receiver from radiation produced by the screen of a cathode-ray tube and directed to scan said record receiver in successive scans, comprising a cathode-ray tube controlled to sweep the beam successively along a single trace on said screen to form successive scans, means to blank and unblank said beam to produce radiation from the unblank segments of successive scans, radiation directing means in the path of said radiation to direct said radiation to said record receiver, said radiation directing means and said record receiver being relatively movable so that successive scans of said radiation move across said record receiver transversely of the said scans, driving means to produce relative movement of said radiation directing means and said record receiver, and adjustable control means including means operable conjointly to adjust the length of the sweep of said beam to conform to dimensions of images of different sizes, and to decrease or increase the speed of said driving means with increase or decrease in the length of said sweep, respectively.
Claim 3
Dependent Claim
179 words
A photocomposing apparatus under control of electrical signals for forming a pattern of images on a radiation sensitive record receiver from radiation produced by the screen of a cathode-ray tube and directed to scan said record receiver in successive scans, comprising a cathode-ray tube controlled to sweep the beam successively along a single trace on said screen to form successive scans, means to blank and unblank said beam to produce radiation from the unblank segments of successive scans in response to said electrical signals, radiation directing means movable in the path of said radiation to direct successive scans of said radiation across said record receiver transversely of the said scans, driving means to move said radiation directing means, and adjustable control means to adjust the length of the sweep of said beam in response to certain of said electrical signals to conform to dimensions of images of different sizes, said certain of said signals also actuating control means for decreasing or increasing the speed of said driving means with increase of decrease in the length of said sweep, respectively.
Claim 4
Dependent Claim
179 words
A photocomposing apparatus under control of electrical signals for forming a pattern of images on a radiation sensitive record receiver from radiation produced by the screen of a cathode-ray tube and directed to scan said record receiver in successive scans, comprising a cathode-ray tube controlled to sweep the beam successively along a single trace on said screen to form successive scans, means to blank and unblank said beam to produce radiation from the unblank segments of successive scans in response to said electrical signals, radiation directing means movable in the path of said radiation to direct successive scans of said radiation across said record receiver transversely of the said scans, driving means to move said radiation directing means, and adjustable control means to adjust the length of the sweep of said beam in response to certain of said electrical signals to conform to dimensions of images of different sizes, said certain of said signals also actuating control means for decreasing or increasing the speed of said driving means with increase of decrease in the length of said sweep, respectively.
Claim 5
Dependent Claim
50 words
A photocomposing apparatus as claimed in claim 2, including means responsive to said certain of said signals to adjust the bias on said tube so that the center of the trace of the sweep of said beam is positioned on the centerline of said screen for any length of sweep.
Claim 6
Dependent Claim
32 words
A photocomposing apparatus as claimed in claim 2, in which said radiation and said record receiver are relatively movable in a direction normal to movement of successive scans across said record receiver.
Claim 7
Dependent Claim
55 words
A photocomposing apparatus as claimed in claim 2, including means to decelerate said driving means under control of said certain of said signals at the end of the relative movement of said radiation across said record receiver to arrest said relative movement in the same relative position irrespective of the speed of said driving means.
Claim 8
Independent Claim
121 words
The method of producing a pattern of an image on a record receiver which is sensitized by radiation received from the screen of a cathode tube, comprising moving a refractive member in front of the face of the cathode-ray tube to direct radiation from successive image elements formed on the screen of said tube across the record receiver to sensitize said receiver in a pattern of successive image elements, controlling the maximum sweep of said beam of said cathode-ray tube to conform to the dimensions of image elements of varying size, and controlling the speed of a motor which moves said refractive member to vary the speed of said motor inversely to the length of the maximum sweep of said beam.
Claim 9
Independent Claim
121 words
The method of producing a pattern of an image on a record receiver which is sensitized by radiation received from the screen of a cathode tube, comprising moving a refractive member in front of the face of the cathode-ray tube to direct radiation from successive image elements formed on the screen of said tube across the record receiver to sensitize said receiver in a pattern of successive image elements, controlling the maximum sweep of said beam of said cathode-ray tube to conform to the dimensions of image elements of varying size, and controlling the speed of a motor which moves said refractive member to vary the speed of said motor inversely to the length of the maximum sweep of said beam.
Claim 10
Independent Claim
147 words
The method of producing a pattern of an image on a record receiver which is sensitized by radiation received from the screen of a cathode-ray tube under control of electrical signals, comprising scanning the screen of a cathode-ray tube in successive sweeps of the beam along a single trace, blanking and unblanking the beam on successive scans in response to signals representing a pattern of an image, directing the radiation from each unblank segment of each scan to a record receiver and sensitizing said receiver by radiation from the unblank segments of said scans, directing said radiation across said record receiver in successive scans to traverse said record receiver in a direction transverse to the direction of said scans, controlling the maximum length of said scans by certain of said signals and controlling the speed of movement of said radiation across said receiver by said latter signals.
Claim 11
Independent Claim
147 words
The method of producing a pattern of an image on a record receiver which is sensitized by radiation received from the screen of a cathode-ray tube under control of electrical signals, comprising scanning the screen of a cathode-ray tube in successive sweeps of the beam along a single trace, blanking and unblanking the beam on successive scans in response to signals representing a pattern of an image, directing the radiation from each unblank segment of each scan to a record receiver and sensitizing said receiver by radiation from the unblank segments of said scans, directing said radiation across said record receiver in successive scans to traverse said record receiver in a direction transverse to the direction of said scans, controlling the maximum length of said scans by certain of said signals and controlling the speed of movement of said radiation across said receiver by said latter signals.
Claim 12
Dependent Claim
44 words
The method claimed in claim 7, which comprises directing said radiation by moving a refractive member in front of said screen relative to said record receiver and driving said element with a motor under control of said signals controlling the speed of said motor.
Claim 13
Dependent Claim
50 words
The method claimed in claim 7, which comprises decelerating said motor at the end of each traverse of said record receiver according to the speed of said motor to stop the motor in the same position at the end of each traverse irrespective of its speed of driving said element.
Claim 14
Dependent Claim
38 words
The method claimed in claim 7, which comprises providing a bias on said tube under control of said certain of said signals to center the trace of the sweep of said beam on the centerline of said screen.
References Cited (Backward Citations)
US2351081A
Cited
US3328522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |