Patent US3222440A successfully refreshed from Google Patents.
US3222440A
Expired / Lapsed
US
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Process and apparatus for the production of oriented plastic net
Assignee: Union Carbide Corp
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Filing: 1962-07-30
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Granted: 1965-12-07
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 John J Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:37
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/919; B29C48/03; B29C48/05; B29C48/13; B29C48/885; B29C48/09; B29C48/10; B29L; B29L2028/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A PROCESS PRODUCING ORIENTED TUBULAR PLASTIC NET, COMPRISING: FORMING EXTRUDED UNSET TUBULAR PLASTIC NET; COOLING SAID PLASTIC NET TO A SETTING TEMPERATURE THEREOF TO SET THE NET; PASSING SAID SET TUBULAR NET OVER A MANDREL HAVING A DIAMETER SUBSTANTIALLY GREATER THAN THE INTERNAL DIAMETER OF SAID NET; APPLYING AN AXIAL STRETCHING FORCE TO SAID NET AS IT IS WITHDRAWN FROM SAID MANDREL; SUBJECTING SAID NET, SUBSEQUENT TO THE SEETING THEREOF AND PRIOR TO PASSAGE OVER SAID MANDREL, TO A RESTRAINING FORCE IN COOPERATION WITH SAID AXIAL STRETCHING FORCE TO CONTROL THE DEGREE OF AXIAL STRETCHING FORCE APPLIED TO SAID NET AND SUBSTANTIALLY PREVENT SAID AXIAL STRETCHING FORCE FROM EXTENDING TO THE UNSET PORTION OF THE EXTRUDED NET, THEREBY SIMULTANEOUSLY STRETCHING THE PORTIN OF SAID NET AROUND SAID MANDREL IN BOTH AXIAL AND RADIAL DIRECTIONS, SAID NET BEING MAINTAINED AT AN ORIENTATION TEMPERATURE WHILE BEING STRETCHED.
Claim 2
Dependent Claim
145 words
A PROCESS PRODUCING ORIENTED TUBULAR PLASTIC NET, COMPRISING: FORMING EXTRUDED UNSET TUBULAR PLASTIC NET; COOLING SAID PLASTIC NET TO A SETTING TEMPERATURE THEREOF TO SET THE NET; PASSING SAID SET TUBULAR NET OVER A MANDREL HAVING A DIAMETER SUBSTANTIALLY GREATER THAN THE INTERNAL DIAMETER OF SAID NET; APPLYING AN AXIAL STRETCHING FORCE TO SAID NET AS IT IS WITHDRAWN FROM SAID MANDREL; SUBJECTING SAID NET, SUBSEQUENT TO THE SEETING THEREOF AND PRIOR TO PASSAGE OVER SAID MANDREL, TO A RESTRAINING FORCE IN COOPERATION WITH SAID AXIAL STRETCHING FORCE TO CONTROL THE DEGREE OF AXIAL STRETCHING FORCE APPLIED TO SAID NET AND SUBSTANTIALLY PREVENT SAID AXIAL STRETCHING FORCE FROM EXTENDING TO THE UNSET PORTION OF THE EXTRUDED NET, THEREBY SIMULTANEOUSLY STRETCHING THE PORTIN OF SAID NET AROUND SAID MANDREL IN BOTH AXIAL AND RADIAL DIRECTIONS, SAID NET BEING MAINTAINED AT AN ORIENTATION TEMPERATURE WHILE BEING STRETCHED.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |