US3320225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing a plastic hinge
Assignee: C & D ACQUISITION CORP A CORP OF DE
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Filing: 1965-02-08
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Granted: 1967-05-16
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Expires: 1985-02-08
Abstract
No abstract record available.
Inventors
- 👤 Bradbury Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:50
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/04; B29C53/06; B29C48/00; B29C48/001; B29C48/0011; B29C48/0018; B29C48/0019; B29C48/03; B29C48/07; B29C48/08; B29C48/12; B29C48/16; B29C48/17; B29C59/00; B29C59/02; B29C59/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METHOD FOR MANUFACTURING A PLASTIC HINGE WHICH COMPRISES FEEDING AN OLEFIN POLYMER MATERIAL INTO AN EXTRUDER, FORCING THE OLEFIN POLYMER MATERIAL THROUGH AN EXTRUSION DIE TO FORM AN EXTRUDATE, PASSING THE HOT AND SOFT EXTRUDABLE BETWEEN A PAIR OF CONTINUOUS PRESSURE ROLLS, AT LEAST ONE OF SAID CONTINUOUS PRESSURE ROLLS HAVING A GROOVE FORMING PROJECTION WHICH COMPRESSES THE EXTRUDATE AND REORIENTS THE MOLECULAR CHAIN ACROSS THE LINE OF EXTRUSION BY PERMANENTLY FORMING A GROOVE IN THE EXTRUDATE, SAID PRESSURE ROLLS CONTACTING THE EXTRUDATE AT A TEMPERATURE ABOVE ITS CRYSTALLINE MELTING POINT, SUBSTANTIALLY IMMEDIATELY AFTER REORIENTATION COOLING THE EXTRUDATE TO A TEMPERATURE BELOW ITS CRYSTALLINE MELTING POINT TO LOCK IN THE REORIENTATION, AND RECOVERING AND EXTRUDED OLEFIN POLYMER STRIP MATERIAL HAVING A GROOVE FORMED IN THE CENTRAL PORTION THEREOF ON AT LEAST ONE SIDE OF SAID OLEFIN POLYMER STRIP MATERIAL WHICH HAS SUFFICIENT FLEXURAL STRENGTH TO BE USEFUL AS A HINGE.
Claim 2
Independent Claim
151 words
A METHOD FOR MANUFACTURING A PLASTIC HINGE WHICH COMPRISES FEEDING AN OLEFIN POLYMER MATERIAL INTO AN EXTRUDER, FORCING THE OLEFIN POLYMER MATERIAL THROUGH AN EXTRUSION DIE TO FORM AN EXTRUDATE, PASSING THE HOT AND SOFT EXTRUDABLE BETWEEN A PAIR OF CONTINUOUS PRESSURE ROLLS, AT LEAST ONE OF SAID CONTINUOUS PRESSURE ROLLS HAVING A GROOVE FORMING PROJECTION WHICH COMPRESSES THE EXTRUDATE AND REORIENTS THE MOLECULAR CHAIN ACROSS THE LINE OF EXTRUSION BY PERMANENTLY FORMING A GROOVE IN THE EXTRUDATE, SAID PRESSURE ROLLS CONTACTING THE EXTRUDATE AT A TEMPERATURE ABOVE ITS CRYSTALLINE MELTING POINT, SUBSTANTIALLY IMMEDIATELY AFTER REORIENTATION COOLING THE EXTRUDATE TO A TEMPERATURE BELOW ITS CRYSTALLINE MELTING POINT TO LOCK IN THE REORIENTATION, AND RECOVERING AND EXTRUDED OLEFIN POLYMER STRIP MATERIAL HAVING A GROOVE FORMED IN THE CENTRAL PORTION THEREOF ON AT LEAST ONE SIDE OF SAID OLEFIN POLYMER STRIP MATERIAL WHICH HAS SUFFICIENT FLEXURAL STRENGTH TO BE USEFUL AS A HINGE.
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |