US2738828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and arrangement to carry out welding operations on plastic film webs
Assignee: Individual
•
Filing: 1954-01-25
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Granted: 1956-03-20
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Expires: 1974-01-25
Abstract
No abstract record available.
Inventors
- 👤 Hammer Steffen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:16
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/78; B29C65/7858; B29C65/7861; B29C65/787; B29C65/7873; B29C65/02; B29C65/18; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83421; B29C66/83431; B29C66/83433; B29C66/8351; B29C66/83511; B29C66/70; B29C66/71; Y; Y10; Y10T; Y10T156/00; Y10T156/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
A METHOD OF WELDING CONTINUOUS THERMOPLASTIC FILM WEBS TO FORM A CONTINUOUS SERIES OF BAGS COMPRISING THE STEPS OF ADVANCING A SUBSTANTIALLY TUBE-SHAPED THERMOPLASTIC FILM WEB OVER A DRUM, SUPERIMPOSING AN ENDLESS WEB OF HEAT RESISTANT PLASTIC OVER SAID FILM WEB WHEREBY SAID FILM WEB IS HELD FIRMLY AGAINST SAID CURCUMFERENCE OF SAID DRUM, PROGRESSIVELY SEALING SAID WEB TRANSVERSELY AS SAID FIRMLY HELD WEB ADVANCES OVER SAID DRUM, AND PROGRESSIVELY SEALING SAID WEB LONGITUDINALLY AS SAID FIRMLY HELD WEB ADVANCES OVER SAID DRUM.
Claim 2
Independent Claim
83 words
A METHOD OF WELDING CONTINUOUS THERMOPLASTIC FILM WEBS TO FORM A CONTINUOUS SERIES OF BAGS COMPRISING THE STEPS OF ADVANCING A SUBSTANTIALLY TUBE-SHAPED THERMOPLASTIC FILM WEB OVER A DRUM, SUPERIMPOSING AN ENDLESS WEB OF HEAT RESISTANT PLASTIC OVER SAID FILM WEB WHEREBY SAID FILM WEB IS HELD FIRMLY AGAINST SAID CURCUMFERENCE OF SAID DRUM, PROGRESSIVELY SEALING SAID WEB TRANSVERSELY AS SAID FIRMLY HELD WEB ADVANCES OVER SAID DRUM, AND PROGRESSIVELY SEALING SAID WEB LONGITUDINALLY AS SAID FIRMLY HELD WEB ADVANCES OVER SAID DRUM.
Claim 3
Dependent Claim
95 words
A ROTATING WELDING MACHINE FOR PLASTIC WELDS COM PRISING GUIDE ROLLERS WHEREBY AN ENDLESS WEB OF POLYTETRAFLUORETHYLENE IS BROUGHT TO LAY OVER THE CIRCUMFERENCE OF A SUPPORTING ROLLER GUIDE ROLLERS WHEREBY A PLASTIC FILM WEB IS BROUGHT TO LAY BETWEEN SAID POLYTETRAFLUORETHYLENE WEB AND SAID SUPPORTING ROLLER, AND ROTATABLE WELDING MEANS DISPOSED ADJACENT TO SAID SUPPORTING ROLLER, SAID ROTATABLE WELDING MEANS HAVING ROLLING CONTACT WITH SAID ENDLESS WEB, THAT PORTION OF SAID WELDING MEANS IN CONTACT WITH SAID ENDLESS BELT MOVING IN SUBSTANTIALLY THE SAME DIRECTION AS SAID ENDLESS BELT AT SAID POINT OF CONTACT.
Claim 4
Dependent Claim
95 words
A ROTATING WELDING MACHINE FOR PLASTIC WELDS COM PRISING GUIDE ROLLERS WHEREBY AN ENDLESS WEB OF POLYTETRAFLUORETHYLENE IS BROUGHT TO LAY OVER THE CIRCUMFERENCE OF A SUPPORTING ROLLER GUIDE ROLLERS WHEREBY A PLASTIC FILM WEB IS BROUGHT TO LAY BETWEEN SAID POLYTETRAFLUORETHYLENE WEB AND SAID SUPPORTING ROLLER, AND ROTATABLE WELDING MEANS DISPOSED ADJACENT TO SAID SUPPORTING ROLLER, SAID ROTATABLE WELDING MEANS HAVING ROLLING CONTACT WITH SAID ENDLESS WEB, THAT PORTION OF SAID WELDING MEANS IN CONTACT WITH SAID ENDLESS BELT MOVING IN SUBSTANTIALLY THE SAME DIRECTION AS SAID ENDLESS BELT AT SAID POINT OF CONTACT.
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |