US3153607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for heat sealing the longitudinal seams of heat sealable tubular webs
Assignee: Individual
•
Filing: 1961-05-08
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Granted: 1964-10-20
•
Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Vernon C Ambler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:43
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/48; B29C65/52; B29C53/00; B29C53/36; B29C53/38; B29C53/48; B29C65/02; B29C65/18; B29C65/4805; B29C65/481; B29C65/4815; B29C66/00; B29C66/004; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/347; B29C66/3472; B29C66/348; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/49; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72327; B29C66/72328; B29C66/80; B29C66/81; B29C66/818; B29C66/8181; B29C66/82; B29C66/822; B29C66/8221; B29C66/824; B29C66/8248; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C66/83415; B29C66/83417; B31; B31B; B31B70/00; B29C2795/00; B29C2795/002; B29C65/4825; B29C65/526; B29C66/71; B29C66/84; B29C66/851; B29C66/8511; B29K; B29K2027/00; B29K2027/08; B29K2711/00; B29K2711/12; B29K2711/123; B31B2155/00; B31B2155/001; B31B2155/0012; B31B2160/00; B31B2160/10; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
238 words
IN AN APPARATUS FOR HEAT SEALING THE LONGITUDINAL SEAMS OF CONTINUOUSLY MOVING TUBULAR WEBS OF THIN HEAT SEALABLE MATERIAL SUITABLE FOR MAKING BAGS, A FORMER INCLUDING A FORMER SHOE, FORMING A FLAT WEB INTO A TUBULAR FORM HAVING OVERLAPPING PLIES EXTENDING ALONG THE CENTER OF THE WEB, A ROTATABLE HEATER DRUM SPACED IN ADVANCE OF SAID FORMER SHOE AND HAVING A HEATER RING DISPOSED INTERMEDIATE THE ENDS OF SAID DRUM HAVING AN OUTER SURFACE FLUSH WITH THE PERIPHERY OF SAID DRUM AND HAVING A HEATING ELEMENT DISPOSED RADIALLY INWARDLY OF THE PERIPHERY OF SAID DRUM, MEANS DRAWING A WEB ALONG SAID FORMER SHOE AND PARTIALLY WRAPPING THE WEB ABOUT SAID DRUM, WITH THE OVERLAPPING PLIES OF HTE WEB, FORMING THE CENTER OF HTE SEAM OF HTE TUBULAR WEB, IN ENGAGEMENT WITH THE OUTER SURFACE OF SAID HEATER RING, AND A FLEXIBLE INSULATING STRIP SECURED TO SAID FORMER SHOE AT ONE END AND EXTENDING IN ADVANCE OF SAID FORMER BETWEEN THE PILES OF THE WEB BEYOND SAID HEATER DRUM AND RESTRAINED FROM TRAVEL WITH THE WEB BY SAID FORMER SHOE, AND INSULATING THE PLIES OF THE WEB FROM EACH OTHER WHILE THE WEB IS PASSING ALONG SAID HEATER DRUM AND MAINTAINING PRESSURE ON THE OVERLAPPING PLIES OF THE WEB AGAINST SAID HEATER RING BY THE TENSION OF SAID INSULATING STRIP ATTAINED BY THE FRICTIONAL RESISTANCE BETWEEN THE TRAVELING WEB AND SAID INSULATING STRIP, RESTRAINED FROM TRAVEL WITH THE WEB.
Claim 2
Dependent Claim
238 words
IN AN APPARATUS FOR HEAT SEALING THE LONGITUDINAL SEAMS OF CONTINUOUSLY MOVING TUBULAR WEBS OF THIN HEAT SEALABLE MATERIAL SUITABLE FOR MAKING BAGS, A FORMER INCLUDING A FORMER SHOE, FORMING A FLAT WEB INTO A TUBULAR FORM HAVING OVERLAPPING PLIES EXTENDING ALONG THE CENTER OF THE WEB, A ROTATABLE HEATER DRUM SPACED IN ADVANCE OF SAID FORMER SHOE AND HAVING A HEATER RING DISPOSED INTERMEDIATE THE ENDS OF SAID DRUM HAVING AN OUTER SURFACE FLUSH WITH THE PERIPHERY OF SAID DRUM AND HAVING A HEATING ELEMENT DISPOSED RADIALLY INWARDLY OF THE PERIPHERY OF SAID DRUM, MEANS DRAWING A WEB ALONG SAID FORMER SHOE AND PARTIALLY WRAPPING THE WEB ABOUT SAID DRUM, WITH THE OVERLAPPING PLIES OF HTE WEB, FORMING THE CENTER OF HTE SEAM OF HTE TUBULAR WEB, IN ENGAGEMENT WITH THE OUTER SURFACE OF SAID HEATER RING, AND A FLEXIBLE INSULATING STRIP SECURED TO SAID FORMER SHOE AT ONE END AND EXTENDING IN ADVANCE OF SAID FORMER BETWEEN THE PILES OF THE WEB BEYOND SAID HEATER DRUM AND RESTRAINED FROM TRAVEL WITH THE WEB BY SAID FORMER SHOE, AND INSULATING THE PLIES OF THE WEB FROM EACH OTHER WHILE THE WEB IS PASSING ALONG SAID HEATER DRUM AND MAINTAINING PRESSURE ON THE OVERLAPPING PLIES OF THE WEB AGAINST SAID HEATER RING BY THE TENSION OF SAID INSULATING STRIP ATTAINED BY THE FRICTIONAL RESISTANCE BETWEEN THE TRAVELING WEB AND SAID INSULATING STRIP, RESTRAINED FROM TRAVEL WITH THE WEB.
Claim 3
Dependent Claim
160 words
IN A METHOD OF HEAT SEALING THE LONGITUDINAL SEAMS OF A CONTINUOUSLY MOVING TUBULAR WEBS OF A THIN HEAT SEALABLE MATERIAL SUITABLE FOR MAKING BAGS, THE STEPS WHICH COMPRISES TENSIONING A TUBULAR WEB PARTIALLY ABOUT A HEATER DRUM WITH A LONGITUDINAL SEAM THEREOF IN CONTACT WITH A HEATED SURFACE ON THE DUREM AND DRAWING THE WEB ALONG DRUM, PROVIDING A FLEXIBLE INSULATOR OF SUBSTANTAIL LENGTH BETWEEN THE PLIES OF THE WEB AND RESTRAINING THE INSULATOR FROM TRAVEL WITH THE WEB AND INSULATING THE PLIES OF THE WEB BY SAID INSULATOR DURING TENSIONING THEREOF AND MAINTAINING PRESSURE ON THE LONGITUDINAL SEAM IN CONTACT WITH THE HEATED SURFACE ON THE DRUM BY TENSION ON THE INSULATOR ATTAINED BY THE FRICTIONAL RESISTANCE BETWEEN THE WEB AND SAID INSULATOR AND THEREBY SEALING THE SEAM, AND THEN SPREADING THE TUBULAR WEB TO ITS ORIGINAL SIZE BY ENGAGEMENT OF THE INSULATOR WITH THE OPPOSITE INNER SIDES OF THE WEB AT THE WEB TRAVELS ALONG THE INSULATOR.
Claim 4
Dependent Claim
160 words
IN A METHOD OF HEAT SEALING THE LONGITUDINAL SEAMS OF A CONTINUOUSLY MOVING TUBULAR WEBS OF A THIN HEAT SEALABLE MATERIAL SUITABLE FOR MAKING BAGS, THE STEPS WHICH COMPRISES TENSIONING A TUBULAR WEB PARTIALLY ABOUT A HEATER DRUM WITH A LONGITUDINAL SEAM THEREOF IN CONTACT WITH A HEATED SURFACE ON THE DUREM AND DRAWING THE WEB ALONG DRUM, PROVIDING A FLEXIBLE INSULATOR OF SUBSTANTAIL LENGTH BETWEEN THE PLIES OF THE WEB AND RESTRAINING THE INSULATOR FROM TRAVEL WITH THE WEB AND INSULATING THE PLIES OF THE WEB BY SAID INSULATOR DURING TENSIONING THEREOF AND MAINTAINING PRESSURE ON THE LONGITUDINAL SEAM IN CONTACT WITH THE HEATED SURFACE ON THE DRUM BY TENSION ON THE INSULATOR ATTAINED BY THE FRICTIONAL RESISTANCE BETWEEN THE WEB AND SAID INSULATOR AND THEREBY SEALING THE SEAM, AND THEN SPREADING THE TUBULAR WEB TO ITS ORIGINAL SIZE BY ENGAGEMENT OF THE INSULATOR WITH THE OPPOSITE INNER SIDES OF THE WEB AT THE WEB TRAVELS ALONG THE INSULATOR.
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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) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |