Patent US3581964A successfully refreshed from Google Patents.
US3581964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film transport mechanism
Assignee: NCR Voyix Corp
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Filing: 1969-03-26
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Granted: 1971-06-01
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Expires: 1989-03-26
Abstract
Abstract A transport mechanism for use with either perforated or nonperforated film during its intermittent travel through a camera, projector, or like film-handling machine wherein the mechanism includes means for momentarily slowing the speed of the film prior to stopping the film. The perforated film embodiment utilizes sprocketed rollers for carrying the film, and positioning and detent means for initiating and maintaining control of the film-driving means. The nonperforated film embodiment utilizes clutched rollers for carrying the film, coded film markings, and light means responsive to the position of the film markings during travel of the film for initiating and maintaining control of the film drive means. The speed of the film is reduced from a constant high speed to a constant low speed to enable subsequent stopping at a precise location.
Inventors
- 👤 Francis A Betron
- 👤 Roger W Morin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:27
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A film transport apparatus adaptable for use with perforated or nonperforated film in a machine having feed and takeup reels, and means for controlling the film in intermittent travel in its path from one to the other reel, including a drive motor, a film-driving roller and a film driven roller connected to the drive motor, first position means including a driven potentiometer having first points thereon responsive to travel of the film for signaling the drive motor to slow the speed of the rollers carrying the film, and second position means comprising second points on the driven potentiometer responsive to further travel of the film for signaling the drive motor to stop the rollers and the film.
Claim 2
Dependent Claim
117 words
A film transport apparatus adaptable for use with perforated or nonperforated film in a machine having feed and takeup reels, and means for controlling the film in intermittent travel in its path from one to the other reel, including a drive motor, a film-driving roller and a film driven roller connected to the drive motor, first position means including a driven potentiometer having first points thereon responsive to travel of the film for signaling the drive motor to slow the speed of the rollers carrying the film, and second position means comprising second points on the driven potentiometer responsive to further travel of the film for signaling the drive motor to stop the rollers and the film.
Claim 3
Dependent Claim
130 words
A film transport apparatus adaptable for use with perforated or nonperforated film in a machine having feed and takeup reels, and means for controlling the film in intermittent travel in its path from one to the other reel, including a drive motor, a film-driving roller and a film driven roller connected to the drive motor, the driving and driven rollers frictionally engaging the film and having clutches for maintaining the driving force on the film in one direction, first position means having light-oriented elements spaced to respond to film travel for signaling the drive motor to slow the speed of the rollers carrying the film, and second position means having light-oriented elements spaced to respond to further travel of the film for signaling the drive motor to stop the film.
Claim 4
Dependent Claim
130 words
A film transport apparatus adaptable for use with perforated or nonperforated film in a machine having feed and takeup reels, and means for controlling the film in intermittent travel in its path from one to the other reel, including a drive motor, a film-driving roller and a film driven roller connected to the drive motor, the driving and driven rollers frictionally engaging the film and having clutches for maintaining the driving force on the film in one direction, first position means having light-oriented elements spaced to respond to film travel for signaling the drive motor to slow the speed of the rollers carrying the film, and second position means having light-oriented elements spaced to respond to further travel of the film for signaling the drive motor to stop the film.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |