US3554828A
Expired / Lapsed
US
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Process for the manufacture of bonded plastic sacks employing an electrical field and an ionizable gas
Assignee: Windmoeller and Hoelscher KG
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Filing: 1967-01-03
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Granted: 1971-01-12
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Expires: 1987-01-03
Abstract
Abstract A PROCESS FOR THE MANUFACTURE OF SACKS MADE OF PLASTIC MATERIAL. THE PROCESS CONSISTS OF THE FOLLOWING STEPS: FORMING A CONTINUOUS TUBE OF PLASTIC MATERIAL AND THEN FILLING THE TUBE WITH AN IONIZABLE GAS TO SEPARATE THE INSIDE SURFACES THEREOF; MOVING THE CONTINUOUS TUBE LONGITUDINALLY THROUGH A PRETREATING ELECTRIC FIELD AND IONIZING THE GAS INSIDE OF THE TUBE TO ACTIVATE THE INTERNAL SURFACES THEREOF; SEVERING THE TUBE INTO SECTIONS WHEN THE INTERNAL SURFACES HAVE BEEN ACTIVATED AND OPENING THE TUBE SECTION ENDS AND THEN APPLYING ON ADHESIVE TO THE INTERIOR OF SAID TUBE SECTION ENDS ADHESIVELY JOINING SAME.
Inventors
- 👤 Herbert Schmedding
- 👤 Helmut Helbig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:03
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/10; B29C59/103; B29C66/00; B29C66/01; B29C66/02; B29C66/028; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/432; B29C66/4322; B29C65/00; B29C65/02; B29C65/48; B29C65/4805; B29C65/481; B29C65/482; B29C65/483; B29C65/78; B29C65/7841; B29C65/7847; B29C66/70; B29C66/71; B29L; B29L2023/00; B29L2023/001; B31; B31B; B31B2155/00; B31B2155/003; B31B70/00; B31B70/60; B31B70/62; B31B70/74; B31B70/79; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1005
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |