US3282760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealing thermoplastic wrapped packages
Assignee: Union Carbide Corp
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Filing: 1961-11-14
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Granted: 1966-11-01
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Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Carlos D Gutierrez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:49
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/10; B29C65/24; B29C65/26; B29C65/78; B29C65/7858; B29C65/7879; B29C65/7882; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/812; B29C66/8124; B29C66/81241; B29C66/818; B29C66/8181; B29C66/81811; B29C66/81812; B29C66/82; B29C66/826; B29C66/8266; B29C66/82661; B65; B65B; B65B51/00; B65B51/10; B65B51/20; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/71; B29C66/8122; B29K; B29K2023/00; B29K2995/00; B29K2995/0037; B29K2995/0065; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
METHOD FOR HEAT SEALING PACKAGES OVERWRAPPED WITH THERMOPLASTIC FILMS AND HAVING AT LEAST TWO SEALING PORTIONS THEREON WHICH COMPRISES: (A) HEATING AT LEAST TWO SPACED POROUS PLATES EACH HAVING A MEAN PORE OPENING OF FROM 4 TO 30 MICRONS; (B) POSITIONING SAID PACKAGE BETWEEN THE THUS HEATED POROUS PLATES IN SUCH A MANNER THAT THE SEALING PORTIONS OF SAID PACKAGE ARE EACH IN CLOSE PROXIMITY TO ONE SIDE OF EACH OF SAID HEATED PORUS PLATES; (C) DRAWING THE SEALING PORTIONS OF SAID PACKAGE INTO DIRECT CONTACT WITH SAID HEATED POROUS PLATES BY APPLYING SUBATMOSPHERIC PRESSURE TO THE OTHER SIDES THEREOF THEREBY REMOVING TRAPPED AIR FROM BETWEEN FOLDS OF THE FILM, EXERTING UNIFORM PRESSURE THROUGHOUT THE ENTIRE SEAL AREA AND HEAT SEALING SAID OVERWRAPPED THERMOPLASTIC FILM; (D) PASSING COLD AIR UNDER PRESSURE THROUGH SAID POROUS PLATES THEREBY COOLING THE THUS SEALED PORTIONS AND RELEASING SAID PACKAGE AWAY FROM SAID POROUS PLATES.
Claim 2
Dependent Claim
150 words
METHOD FOR HEAT SEALING PACKAGES OVERWRAPPED WITH THERMOPLASTIC FILMS AND HAVING AT LEAST TWO SEALING PORTIONS THEREON WHICH COMPRISES: (A) HEATING AT LEAST TWO SPACED POROUS PLATES EACH HAVING A MEAN PORE OPENING OF FROM 4 TO 30 MICRONS; (B) POSITIONING SAID PACKAGE BETWEEN THE THUS HEATED POROUS PLATES IN SUCH A MANNER THAT THE SEALING PORTIONS OF SAID PACKAGE ARE EACH IN CLOSE PROXIMITY TO ONE SIDE OF EACH OF SAID HEATED PORUS PLATES; (C) DRAWING THE SEALING PORTIONS OF SAID PACKAGE INTO DIRECT CONTACT WITH SAID HEATED POROUS PLATES BY APPLYING SUBATMOSPHERIC PRESSURE TO THE OTHER SIDES THEREOF THEREBY REMOVING TRAPPED AIR FROM BETWEEN FOLDS OF THE FILM, EXERTING UNIFORM PRESSURE THROUGHOUT THE ENTIRE SEAL AREA AND HEAT SEALING SAID OVERWRAPPED THERMOPLASTIC FILM; (D) PASSING COLD AIR UNDER PRESSURE THROUGH SAID POROUS PLATES THEREBY COOLING THE THUS SEALED PORTIONS AND RELEASING SAID PACKAGE AWAY FROM SAID POROUS PLATES.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |