US4050642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winding or rewinding film
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1975-10-08
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Granted: 1977-09-27
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Expires: 1995-10-08
Abstract
Abstract A method and apparatus for winding or rewinding a film wherein a pressurized jet of air is directed onto a surface of an unsupported portion of the film being wound or rewound. The air jet is elongated transversely of the length of said film. Simultaneously with the application of the air jet to the film the air impinging on the surface of the film is collected by suction.
Inventors
- 👤 Takuma Katsumata
- 👤 Koji Kato
- 👤 Hisao Kishigami
- 👤 Noriyasu Kuroda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:48
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/24; Y; Y10; Y10S; Y10S242/00; Y10S242/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
Apparatus for winding or rewinding a film comprising: a spool; a roll positioned adjacent said spool for guiding film being wound or rewound on the spool; means for directing pressurized air against a surface of the film located between said spool and the guide roll and for collecting said air by suction on the same side of the film as said surface, said means including at least one nozzle formed to direct onto said film surface, and beyond the edges thereof, a jet of air which is elongated transversely of the length of said film.
Claim 2
Dependent Claim
95 words
Apparatus for winding or rewinding a film comprising: a spool; a roll positioned adjacent said spool for guiding film being wound or rewound on the spool; means for directing pressurized air against a surface of the film located between said spool and the guide roll and for collecting said air by suction on the same side of the film as said surface, said means including at least one nozzle formed to direct onto said film surface, and beyond the edges thereof, a jet of air which is elongated transversely of the length of said film.
References Cited (Backward Citations)
US1575892A
Cited
US2678173A
Cited
US3134527A
Cited
US3156423A
Cited
US3351521A
Cited
US3690644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |