US3293099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat sealing a material of the type having a thermoplastic coating on either side of a carrying layer
Assignee: Tetra Pak AB
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Filing: 1963-11-21
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Granted: 1966-12-20
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Expires: 1983-11-21
Abstract
No abstract record available.
Inventors
- 👤 Stark Sven Olof Soren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:41
CPC Classifications
B; B32; B32B; B32B27/00; B29; B29C; B29C65/00; B29C65/02; B29C66/00; B29C66/005; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/70; B29C66/72; B29C66/723; B29C66/80; B29C66/87; B29C66/876; B29C66/8762; B29C65/18; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/432; B29C66/4322; B29C66/71; B29C66/7232; B29C66/72327; B29C66/72328; B29L; B29L2009/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
117 words
METHOD OF HEAT SEALING A MATERIAL HAVING A THERMOPLASTIC COATING ON BOTH SIDE OF A BODY LAYER WHICH COMPRISES COMPRESSING AND HEATING AN AREA OF SUPERPOSED LAYERS OF SAID MATERIAL BY MEANS OF A PAIR OF COOPERATING CLAMPING JAWS PROVIDED WITH HEAT EMITTING MEANS WHEREBY THE THERMOPLASTIC COATINGS FACING EACH OTHER AND THE THERMOPLASTIC COATING FACING SAID CLAMPING JAWS ARE MELTED, COOLING SAID THERMOPLASTIC COATINGS IN SAID AREA WHEREBY SAID COATINGS ARE SOLIDIFIED AND STABILIZED, ENERGIZING SAID HEAT EMITTING MEANS PRACTICALLY INSTANTANEOUSLY SUFFICIENTLY TO MELT THE THERMOPLASTIC COATING FACING SAID CLAMPING JAWS THEREBY PREVENTING ADHESION BETWEEN SAID THERMOPLASTIC COATING AND SAID CLAMPING JAWS, RELEASING THE PRESSURE ON SAID CLAMPING JAWS AND SEPARATING THEM FROM SAID SUPERPOSED LAYERS.
Claim 2
Dependent Claim
117 words
METHOD OF HEAT SEALING A MATERIAL HAVING A THERMOPLASTIC COATING ON BOTH SIDE OF A BODY LAYER WHICH COMPRISES COMPRESSING AND HEATING AN AREA OF SUPERPOSED LAYERS OF SAID MATERIAL BY MEANS OF A PAIR OF COOPERATING CLAMPING JAWS PROVIDED WITH HEAT EMITTING MEANS WHEREBY THE THERMOPLASTIC COATINGS FACING EACH OTHER AND THE THERMOPLASTIC COATING FACING SAID CLAMPING JAWS ARE MELTED, COOLING SAID THERMOPLASTIC COATINGS IN SAID AREA WHEREBY SAID COATINGS ARE SOLIDIFIED AND STABILIZED, ENERGIZING SAID HEAT EMITTING MEANS PRACTICALLY INSTANTANEOUSLY SUFFICIENTLY TO MELT THE THERMOPLASTIC COATING FACING SAID CLAMPING JAWS THEREBY PREVENTING ADHESION BETWEEN SAID THERMOPLASTIC COATING AND SAID CLAMPING JAWS, RELEASING THE PRESSURE ON SAID CLAMPING JAWS AND SEPARATING THEM FROM SAID SUPERPOSED LAYERS.
Claim 3
Dependent Claim
61 words
METHOD IN ACCORDANCE WITH CLAIM 1 IN WHICH THE CLAMPING JAWS ARE HEATED DURING THE RELEASE OF PRESSURE AND THE FOLLOWING REMOVAL OF THE CLAMPING JAWS FROM SAID AREA FOR A SUFFICIENTLY LONG PERIOD AND WITH SUFFICIENT INTENSITY TO ENSURE THAT THE THERMOPLASICT MATERIAL WHICH MAY HAVE DEPOSITED ON THE SEALING SURFACES OF THE CLAMPING JAWS IS BURNT OR COMPLETELY DECOMPOSED.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |