US3984508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling an extrudate with a deckle bar having heating and cooling means
Assignee: Phillips Petroleum Co
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Filing: 1974-08-23
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Granted: 1976-10-05
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Expires: 1994-08-23
Abstract
Abstract A method for controlling the extrudate emerging from an extruder is provided by sealing a portion of the extrusion die opening with a deckle bar into which is incorporated means for affecting the temperature at the surface of the deckle bar. The embodiments of this invention provide deckle bars into which are incorporated means for heating, cooling and heating and cooling in combination.
Inventors
- 👤 Eli Solop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:33
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/86; B29C48/87; B29C48/03; B29C48/07; B29C48/08; B29C48/30; B29C48/305; B29C48/865
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A method for controlling the extrudate emerging from an extruder comprising sealing a portion of the extrusion die opening with a deckle bar and affecting the temperature at the surface of the deckle bar by: a. cooling the sealing face of the deckle, said cooling sufficient to control deposition of extrudate at the sealing face behind the deckle thereby retarding heat degradation of extrudate flowing through said extruder, and b. supplying heat to the surface of the deckle to which the edge of the extrudate conforms on passing thereby, said heat sufficient to prevent freezing of extrudate on said surface.
Claim 2
Independent Claim
100 words
A method for controlling the extrudate emerging from an extruder comprising sealing a portion of the extrusion die opening with a deckle bar and affecting the temperature at the surface of the deckle bar by: a. cooling the sealing face of the deckle, said cooling sufficient to control deposition of extrudate at the sealing face behind the deckle thereby retarding heat degradation of extrudate flowing through said extruder, and b. supplying heat to the surface of the deckle to which the edge of the extrudate conforms on passing thereby, said heat sufficient to prevent freezing of extrudate on said surface.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein both the degree of cooling of the cooled surface is controlled and the degree of heating of the heated surface is controlled.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein degree of cooling of the means for cooling is controlled.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein the heat supplied by the means for supplying heat is controlled.
Claim 6
Dependent Claim
17 words
The method of claim 3 wherein cooling comprises the method of circulating cooling fluid through a cooler.
Claim 7
Dependent Claim
14 words
The method of claim 4 wherein the heating comprises using an electrical cartridge heater.
Claim 8
Dependent Claim
27 words
The method of claim 2 wherein the cooling comprises the method of circulating cooling fluid through a cooler and the heating comprises using an electrical cartridge heater.
References Cited (Backward Citations)
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US3320634A
Cited
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US3769379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |