Patent US4941841A successfully refreshed from Google Patents.
Patent US3060075A successfully refreshed from Google Patents.
US3060075A
Expired / Lapsed
US
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Method and apparatus for producing continuous bag stock
Assignee: Millennium Petrochemicals Inc
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Filing: 1960-07-14
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Granted: 1962-10-23
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Expires: 1980-07-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Kincaid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:22
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/60; B31B70/64; B31B2155/00; B31B2155/003; B31B2160/00; B31B2160/10; B31B70/74; B31B70/92; B31B70/94; B31B70/946; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/1084; Y10T156/1085; Y10T156/12; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1737
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD OF FORMING A CONTINUOUS SERIES OF INTERCONNECTED BAG UNITS FROM A FLATTENED WEB OF A THERMOPLASTIC MATERIAL, WHEREIN SAID WEB INCLUDES SUPERPOSED UPPER AND LOWER LAYERS OF SAID MATERIAL UNITED ALONG THEIR LONGITUDINAL EDGE PORTIONS, COMPRISING MOVING SAID WEB ALONG A TRAVEL PATH, AND IN A PLANE EXTENDING LONGITUDINALLY OF THE WEB, IN A REPETITIVE SERIES OF TIMED MOVEMENT AND DWELL TIME SEQUENCES; DURING EACH DWELL TIME SEQUENCE, APPLYING HEAT AND PRESSURE TO SAID WEB ALONG A LINE TRANSVERSELY THEREOF, WHEREBY TO FUSE AND UNITE SAID WEB LAYERS ALONG SAID LINE; SIMULTANEOUSLY HOLDING SAID LOWER LAYER AGAINST MOVEMENT IN ANY DIRECTION DURING SAID DWELL TIME SEQUENCES; AND WHILE MAINTAINING SAID FUSION PRESSURE AND HOLDING SAID LOWER WEB LAYER, MOVING SAID UPPER LAYER OVER SAID LOWER LAYER IN A DIRECTION LONGITUDINALLY OF SAID WEB, AND OPPOSITE TO THE DIRECTION OF INTERMITTENT MOVEMENT IN SAID TRAVEL PATH.
Claim 2
Independent Claim
147 words
A METHOD OF FORMING A CONTINUOUS SERIES OF INTERCONNECTED BAG UNITS FROM A FLATTENED WEB OF A THERMOPLASTIC MATERIAL, WHEREIN SAID WEB INCLUDES SUPERPOSED UPPER AND LOWER LAYERS OF SAID MATERIAL UNITED ALONG THEIR LONGITUDINAL EDGE PORTIONS, COMPRISING MOVING SAID WEB ALONG A TRAVEL PATH, AND IN A PLANE EXTENDING LONGITUDINALLY OF THE WEB, IN A REPETITIVE SERIES OF TIMED MOVEMENT AND DWELL TIME SEQUENCES; DURING EACH DWELL TIME SEQUENCE, APPLYING HEAT AND PRESSURE TO SAID WEB ALONG A LINE TRANSVERSELY THEREOF, WHEREBY TO FUSE AND UNITE SAID WEB LAYERS ALONG SAID LINE; SIMULTANEOUSLY HOLDING SAID LOWER LAYER AGAINST MOVEMENT IN ANY DIRECTION DURING SAID DWELL TIME SEQUENCES; AND WHILE MAINTAINING SAID FUSION PRESSURE AND HOLDING SAID LOWER WEB LAYER, MOVING SAID UPPER LAYER OVER SAID LOWER LAYER IN A DIRECTION LONGITUDINALLY OF SAID WEB, AND OPPOSITE TO THE DIRECTION OF INTERMITTENT MOVEMENT IN SAID TRAVEL PATH.
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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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |