US3275728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parison severing method
Assignee: Monsanto Co
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Filing: 1962-12-04
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Granted: 1966-09-27
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Expires: 1982-12-04
Abstract
No abstract record available.
Inventors
- 👤 Lawrence A Martino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:54
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/375; B29C48/388; B29C48/03; B29C48/09; B29C48/13; B29C48/30; B29C48/32; B29C48/325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF SEVERING A TUBULAR FORMATION OF PLASTIC MATERIAL BEING EXTRUDED THROUGH AN EXTRUSION OUTLET, SAID METHOD COMPRISING: APPLYING AN INITIAL PRESSURE TO A MASS OF PLASTIC MATERIAL TO INITIATE ITS FLOW THROUGH A CAVITY COMMUNICATING WITH AN EXTRUSION OUTLET; SELECTIVELY REDUCING THE PRESSURE AT WHICH MATERIAL IS EXTRUDED THROUGH SAID OUTLET SO AS TO REDUCE THE WALL THICKNESS OF A SELECTED PORTION OF AN EXTRUDING FORMATION WHEREY A PRIOR EXTRUDED PORTION OF SAID FORMATION MAY BE DISENGAGED BY TERAING; AND EXERTING A FORCE ON SAID FORMATION OF PLASTIC MATERIAL SO AS TO TEAR THE PORTION EXTRUDED PRIOR TO SAID PRESSURE REDUCTION FROM THE PORTION EXTRUDED SUBSEQUENT THERETO.
Claim 2
Independent Claim
109 words
A METHOD OF SEVERING A TUBULAR FORMATION OF PLASTIC MATERIAL BEING EXTRUDED THROUGH AN EXTRUSION OUTLET, SAID METHOD COMPRISING: APPLYING AN INITIAL PRESSURE TO A MASS OF PLASTIC MATERIAL TO INITIATE ITS FLOW THROUGH A CAVITY COMMUNICATING WITH AN EXTRUSION OUTLET; SELECTIVELY REDUCING THE PRESSURE AT WHICH MATERIAL IS EXTRUDED THROUGH SAID OUTLET SO AS TO REDUCE THE WALL THICKNESS OF A SELECTED PORTION OF AN EXTRUDING FORMATION WHEREY A PRIOR EXTRUDED PORTION OF SAID FORMATION MAY BE DISENGAGED BY TERAING; AND EXERTING A FORCE ON SAID FORMATION OF PLASTIC MATERIAL SO AS TO TEAR THE PORTION EXTRUDED PRIOR TO SAID PRESSURE REDUCTION FROM THE PORTION EXTRUDED SUBSEQUENT THERETO.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |