US3233029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cold-stretching orientable sheet material
Assignee: Phillips Petroleum Co
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Filing: 1962-06-08
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Granted: 1966-02-01
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Expires: 1982-06-08
Abstract
No abstract record available.
Inventors
- 👤 Rasmussen Ole-Bendt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:04
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/18; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A METHOD OF COLD STRETCHING A SHEET OF ORIENTABLE PLASTIC MATERIAL IN WHICH SAID SHEET IS STRETCHED LENGTHWISE SUFFICIENTLY TO CAUSE SUBSTANTIAL CONTRACTION IN THE WIDTH OF SAID SHEET, THE IMPROVEMENT WHICH COMPRISES FORMING MULTIPLE LENGTHWISE CONVOLUTIONS ACROSS THE WIDTH OF SAID SHEET, SMOOTHING SAID CONVOLUTIONS INTO PLEATS THEREBY REDUCING THE DISTANCE BETWEEN THE EDGES OF SAID SHEET, AND STRETCHING THE PLEATED SHEET SUFFICIENTLY TO REMOVE SAID PLEATS AS A RESULT OF THE CONTRACTION IN SHEET WIDTH, SAID DISTANCE BETWEEN THE EDGES OF THE PLEATED SHEET BEING SUBSTANTIALLY THE SAME AS THE FINAL WIDTH OF THE STRETCHED SHEET.
Claim 2
Dependent Claim
99 words
IN A METHOD OF COLD STRETCHING A SHEET OF ORIENTABLE PLASTIC MATERIAL IN WHICH SAID SHEET IS STRETCHED LENGTHWISE SUFFICIENTLY TO CAUSE SUBSTANTIAL CONTRACTION IN THE WIDTH OF SAID SHEET, THE IMPROVEMENT WHICH COMPRISES FORMING MULTIPLE LENGTHWISE CONVOLUTIONS ACROSS THE WIDTH OF SAID SHEET, SMOOTHING SAID CONVOLUTIONS INTO PLEATS THEREBY REDUCING THE DISTANCE BETWEEN THE EDGES OF SAID SHEET, AND STRETCHING THE PLEATED SHEET SUFFICIENTLY TO REMOVE SAID PLEATS AS A RESULT OF THE CONTRACTION IN SHEET WIDTH, SAID DISTANCE BETWEEN THE EDGES OF THE PLEATED SHEET BEING SUBSTANTIALLY THE SAME AS THE FINAL WIDTH OF THE STRETCHED SHEET.
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |