Patent US3632733A successfully refreshed from Google Patents.
US3632733A
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US
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Heat treating two-ply biaxially oriented films
Assignee: KOBUNSHI KAKO KENKYUJYO KK
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Filing: 1969-03-05
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Granted: 1972-01-04
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Expires: 1989-03-05
Abstract
Abstract HEAT TREATMENT OF BIAXIALLY ORIENTED FILM COMPRISING OVERLAPPING TWO PLIES OF FILM LEAVING A THIN AIR LAYER BETWEEN THEN AND PASSING THE COMPOSITE OVER AND UNDER HEATING CYLINDERS OF GENERALLY INCREASING TEMPERATURE AND DECREASING SPEEDS WHILE BLOWING COOLING AIR ON THE SURFACE OF THE COMPOSITE NOT IN CONTACT WITH THE CYLINDER. BY USING TWO PLIES OF FILM, ONE SERVES AS A BACK-UP SHEET WHILE THE OTHER IS BEING DIRECTLY HEATED. THE TRANSVERSE CONTRACTION DURING PROCESSING IS MINIMIZED AND LOW RESIDUAL SHRINKAGE IS ACHIEVED.
Inventors
- 👤 Masahide Yazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:40
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/02; B29B13/023; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29C; B29C35/00; B29C35/02; B29D; B29D7/00; B32B1/00; B32B1/08; B32B27/30; B32B27/302; B32B27/304; B32B27/32; B32B27/36; B32B37/00; B32B37/06; B32B37/08; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2307/70; B32B2307/732; B32B2307/734; B32B2309/00; B32B2309/02; B32B2309/12; B32B2323/00; B32B2323/04; B32B2323/043; Y; Y10; Y10S; Y10S428/00; Y10S428/91
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |