Patent US4217322A successfully refreshed from Google Patents.
US4217322A
Expired / Lapsed
US
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Process for extruding synthetic resin and die for use therein
Assignee: Kobe Steel Ltd
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Filing: 1978-07-14
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Granted: 1980-08-12
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Expires: 1998-07-14
Abstract
Abstract A process for extruding a synthetic resin while restricting the resin flow by positively furnishing the resin flow path surface of an extruding die near its resin flow outlet with frictional resistance relative to the resin disclosed also is an extruding die for practicing the above-described method.
Inventors
- 👤 Katsumi Sugano
- 👤 Takeshi Hashimoto
- 👤 Shinzi Hashizume
- 👤 Yoshio Ikegami
- 👤 Shin'ichi Fukumizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:26
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/03; B29C48/07; B29C48/08; B29C48/13; B29C48/255; B29C48/2556; B29C48/30; B29C48/305; B29C48/31; B29C48/06; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
88 words
A process for extruding a synthetic resin, including an extruding die with die lips and a diffusing manifold, said die lips being disposed near the outlet of the resin flow and having frictional resistance relative to the resin in order to restrict the resin flow comprising: extruding resin through said die; passing said resin through said die lips; and providing flow resistance while passing said resin through said die lips so as to eliminate local flow of the resin on the resin flow path surface of the die.
Claim 2
Dependent Claim
88 words
A process for extruding a synthetic resin, including an extruding die with die lips and a diffusing manifold, said die lips being disposed near the outlet of the resin flow and having frictional resistance relative to the resin in order to restrict the resin flow comprising: extruding resin through said die; passing said resin through said die lips; and providing flow resistance while passing said resin through said die lips so as to eliminate local flow of the resin on the resin flow path surface of the die.
Claim 3
Dependent Claim
94 words
A die for extruding a sheet-like synthetic resin which comprises: an inlet passage formed in said die; a diffusing manifold communicating with said passage; a flat flow passage communicating with said diffusing manifold; first and second die lips communicating with said flat flow passage including sand paper elements bonded onto the inner wall of said first and second die lips, forming a flat flow path therebetween near the outlet of a resin flow in the width direction; and means for adjusting the positioning of at least one of said first and second die lips.
Claim 4
Dependent Claim
94 words
A die for extruding a sheet-like synthetic resin which comprises: an inlet passage formed in said die; a diffusing manifold communicating with said passage; a flat flow passage communicating with said diffusing manifold; first and second die lips communicating with said flat flow passage including sand paper elements bonded onto the inner wall of said first and second die lips, forming a flat flow path therebetween near the outlet of a resin flow in the width direction; and means for adjusting the positioning of at least one of said first and second die lips.
Claim 5
Dependent Claim
114 words
A die for extruding a sheet-like synthetic resin which comprises: an inlet passage formed in said die; a diffusing manifold communicating with said passage; a flat flow passage communicating with said diffusing manifold; first and second die lips communicating with said flat flow passage including a first and second plurality of parallel grooves formed on the inner wall of the die lips, forming a flat flow path therebetween near the outlet of resin flow in the width direction thereof in two directions such that said first plurality of parallel grooves cross said second plurality of parallel grooves; and means for adjusting the positioning of at least one of said first and second die lips.
Claim 6
Dependent Claim
114 words
A die for extruding a sheet-like synthetic resin which comprises: an inlet passage formed in said die; a diffusing manifold communicating with said passage; a flat flow passage communicating with said diffusing manifold; first and second die lips communicating with said flat flow passage including a first and second plurality of parallel grooves formed on the inner wall of the die lips, forming a flat flow path therebetween near the outlet of resin flow in the width direction thereof in two directions such that said first plurality of parallel grooves cross said second plurality of parallel grooves; and means for adjusting the positioning of at least one of said first and second die lips.
Claim 7
Dependent Claim
105 words
A die for extruding a sheet-like synthetic resin which comprises: an inlet passage formed in said die; a diffusing manifold communicating with said passage; a flat flow passage communicating with said diffusing manifold; first and second die lips communicating with said flat flow passage, including a plurality of parallel grooves formed on the inner wall of the die lips forming a flat flow path therebetween near the outlet of resin flow in the width direction thereof and at a right angle to the extruding direction of the resin; and means for adjusting the positioning of at least one of said first and second die lips.
Claim 8
Dependent Claim
105 words
A die for extruding a sheet-like synthetic resin which comprises: an inlet passage formed in said die; a diffusing manifold communicating with said passage; a flat flow passage communicating with said diffusing manifold; first and second die lips communicating with said flat flow passage, including a plurality of parallel grooves formed on the inner wall of the die lips forming a flat flow path therebetween near the outlet of resin flow in the width direction thereof and at a right angle to the extruding direction of the resin; and means for adjusting the positioning of at least one of said first and second die lips.
Claim 9
Dependent Claim
53 words
A process for extruding synthetic resin as set forth in claim 1 which further comprises: diffusing said resin through said manifold prior to extruding resin through said die lips and forming a flat sheet of resin as a result of passing resin through said die lips so as to contact said frictional resistance.
Claim 10
Dependent Claim
52 words
A die for extruding a sheet-like synthetic resin as set forth in claim 2 wherein said means for adjusting the positioning of at least one of said first and second die lips comprises first and second adjustment bolts mounted on said die and engageable with said first and second die lips, respectively.
Claim 11
Dependent Claim
52 words
A die for extruding a sheet-like synthetic resin as set forth in claim 3 wherein said means for adjusting the positioning of at least one of said first and second die lips comprises first and second adjustment bolts mounted on said die and engageable with said first and second die lips, respectively.
Claim 12
Dependent Claim
52 words
A die for extruding a sheet-like synthetic resin as set forth in claim 4 wherein said means for adjusting the positioning of at least one of said first and second die lips comprises first and second adjustment bolts mounted on said die and engageable with said first and second die lips, respectively.
Claim 13
Dependent Claim
32 words
A die as set forth in claim 2 further comprising means for adjusting flow of resin through said inlet passage positioned between said diffusing manifold and said first and second die lips.
Claim 14
Dependent Claim
32 words
A die as set forth in claim 3 further comprising means for adjusting flow of resin through said inlet passage positioned between said diffusing manifold and said first and second die lips.
Claim 15
Dependent Claim
32 words
A die as set forth in claim 4 further comprising means for adjusting flow of resin through said inlet passage positioned between said diffusing manifold and said first and second die lips.
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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) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |