US3409494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing element for shrink film packaging machine
Assignee: Hercules LLC
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Filing: 1966-03-03
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Granted: 1968-11-05
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Expires: 1986-03-03
Abstract
No abstract record available.
Inventors
- 👤 Charles J Korzinek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:04
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/137; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/221; B29C65/224; B29C65/226; B29C65/228; B29C65/229; B29C65/74; B29C65/743; B29C65/7433; B29C66/004; B29C66/0042; B29C66/0044; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81415; B29C66/81417; B29C66/8145; B29C66/81457; B29C66/816; B29C66/8167; B29C66/818; B29C66/8187; B29C66/81871; B29C66/83; B29C66/832; B29C66/8322; B65; B65B; B65B51/00; B65B51/10; B65B51/14; B29C66/737; B29C66/7371; B29C66/73711; B29C66/73713; B29C66/73715; B29C66/812; B29C66/8122; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1313
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
IN A SHRINK-FILM PACKAGING MACHINE, MEANS FOR SEVERING AND SEALING THE SEVERED EDGES OF A PLURALITY OF PLIES OF THERMOPLASTIC FILM COMPRISING A PAIR OF OPPOSED JAWS FOR CLAMPING THE FILM BETWEEN THE WORKING FACES THEREOF AND INCLUDING A SEVERING JAW AND AN OPPOSING JAW, A RESILIENT BACKING MEMBER ON THE WORKING FACE OF THE OPPOSING JAW AND A SEVERING AND SEALING ELEMENT ON THE WORKING FACE OF THE SEVERING JAW FOR SEVERING THE FILM BY HEAT AND FOR HEAT SEALING THE SEVERED EDGES, SAID SEVERING AND SEALING ELEMENT COMPRISING A RIBBON HAVING A SUBSTANTIALLY V-SHAPED CROSS-SECTION AND DIPOSED WITH THE SIDE EDGES THEREOF TOWARD SAID SEVERING JAW AND THE APEX THEREOF TOWARD THE BACKING JAW WHEREBY WHEN SAID JAWS ARE CLOSED SAID ELEMENT COMPRESSES THE FILM AGAINST SAID BACKING MEMBER WITH THE MAXIMUM PRESSURE AT SAID APEX AND PROGRESSIVELY DECREASING PRESSURE TOWARD SAID SIDE EDGES, SAID JAWS ACTING TO CLAMP THE FILM ON BOTH SIDES OUTWARDLY OF SAID SEVERING AND SEALING ELEMENT, AND MEANS FOR HEATING SAID ELEMENT TO A SEVERING AND SEALING TEMPERATURE.
Claim 2
Dependent Claim
175 words
IN A SHRINK-FILM PACKAGING MACHINE, MEANS FOR SEVERING AND SEALING THE SEVERED EDGES OF A PLURALITY OF PLIES OF THERMOPLASTIC FILM COMPRISING A PAIR OF OPPOSED JAWS FOR CLAMPING THE FILM BETWEEN THE WORKING FACES THEREOF AND INCLUDING A SEVERING JAW AND AN OPPOSING JAW, A RESILIENT BACKING MEMBER ON THE WORKING FACE OF THE OPPOSING JAW AND A SEVERING AND SEALING ELEMENT ON THE WORKING FACE OF THE SEVERING JAW FOR SEVERING THE FILM BY HEAT AND FOR HEAT SEALING THE SEVERED EDGES, SAID SEVERING AND SEALING ELEMENT COMPRISING A RIBBON HAVING A SUBSTANTIALLY V-SHAPED CROSS-SECTION AND DIPOSED WITH THE SIDE EDGES THEREOF TOWARD SAID SEVERING JAW AND THE APEX THEREOF TOWARD THE BACKING JAW WHEREBY WHEN SAID JAWS ARE CLOSED SAID ELEMENT COMPRESSES THE FILM AGAINST SAID BACKING MEMBER WITH THE MAXIMUM PRESSURE AT SAID APEX AND PROGRESSIVELY DECREASING PRESSURE TOWARD SAID SIDE EDGES, SAID JAWS ACTING TO CLAMP THE FILM ON BOTH SIDES OUTWARDLY OF SAID SEVERING AND SEALING ELEMENT, AND MEANS FOR HEATING SAID ELEMENT TO A SEVERING AND SEALING TEMPERATURE.
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |