US3762313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruding plastic
Assignee: Gloucester Engineering Co Inc
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Filing: 1971-06-28
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Granted: 1973-10-02
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Expires: 1991-06-28
Abstract
Abstract An extruder is shown having vertical arrangement of the extruder; a drive shank at the outlet end isolated by an internal air chamber from the heated extruder; the shank cooled by an inserted cooling member; a sealing member surrounding the shank defining a restricted passage that tapers and accommodates eccentricity; the stationary walls of the surrounding member are grooved, resisting outward leakage of the plastic. These various features are shown to achieve a compact, simple, efficient machine.
Inventors
- 👤 C Schott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:01
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/22; B30B11/24; B29; B29B; B29B17/00; B29B17/0005; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/25; B29C48/254; B29C48/285; B29C48/286; B29C48/288; B29C48/29; B29C48/36; B29C48/395; B29C48/50; B29C48/501; B29C48/505; B29C48/51; B29C48/515; B29C48/53; B29C48/68; B29C48/685; B29C48/686; B29C48/78; B29C48/793; B29C48/797; B29C48/80; B29C48/84; B29C48/85; B29C48/88; B29C48/919; B29C48/64; B29L; B29L2007/00; B29L2007/008; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
In an extruder assembly comprising a screw disposed within a barrel having a discharge end and having means driving said screw from said discharge end, said screw having a torque bearing shank Protruding from said barrel discharge end, said shank being hollow and defining an insulating isolation chamber in the region close to the outlet of said extruder, and means to cool the end portion of said shank remote from said barrel discharge end.
Claim 2
Dependent Claim
74 words
In an extruder assembly comprising a screw disposed within a barrel having a discharge end and having means driving said screw from said discharge end, said screw having a torque bearing shank Protruding from said barrel discharge end, said shank being hollow and defining an insulating isolation chamber in the region close to the outlet of said extruder, and means to cool the end portion of said shank remote from said barrel discharge end.
Claim 3
Dependent Claim
22 words
The extruder assembly of claim 1 wherein said means to cool includes liquid conduit means for cooling the interior of said shank.
Claim 4
Dependent Claim
27 words
The assembly of claim 2 wherein said shank is hollow to its end and said means to cool comprises a cooling member inserted into said hollow end.
Claim 5
Dependent Claim
30 words
The assembly of claim 3 wherein said isolation chamber is an air-containing chamber and the inner end of said cooling member defines the outer end of said air-containing insulating chamber.
Claim 6
Dependent Claim
68 words
A heated extruder including a screw having a torque bearing shank extending beyond the extruder outlet, for driving said screw, a seal defined with said shank for the molten plastic within said extruder, said seal comprising a liquid cooling member inserted into the hollow end of said shank, cooling its outer surface, and a cooled outer sealing member surrounding said shank and defining therewith a restricted leakage passage.
Claim 7
Dependent Claim
68 words
A heated extruder including a screw having a torque bearing shank extending beyond the extruder outlet, for driving said screw, a seal defined with said shank for the molten plastic within said extruder, said seal comprising a liquid cooling member inserted into the hollow end of said shank, cooling its outer surface, and a cooled outer sealing member surrounding said shank and defining therewith a restricted leakage passage.
Claim 8
Dependent Claim
57 words
The extruder of claim 5 wherein said cooling member comprises an outer tubular member tightly fitting against the inner surface of said hollow shank, the inner end of said tubular member being closed, and a conduit smaller than the internal diameter of said tubular member inserted into said tubular member, liquid inlet and outlet passages defined thereby.
Claim 9
Dependent Claim
26 words
The extruder of claim 6 wherein the hollow chamber within said shank extends beyond the end of said cooling member, defining therewith an isolating air chamber.
References Cited (Backward Citations)
US1762368A
Cited
US1750916A
Cited
US2149736A
Cited
US3278986A
Cited
US3354504A
Cited
US3416189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |