US3751209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die with channeled die endplates
Assignee: Standard Oil Co
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Filing: 1971-04-02
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Granted: 1973-08-07
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Expires: 1991-04-02
Abstract
Abstract A flat film extrusion die comprising: a body having (1) means defining an inlet recess; (2) a longitudinally extending passageway communicating with said recess; (3) an extrusion manifold in flow communication with said inlet passageway extending substantially the entire width of the die; and (4) opposed wall portions in flow communication with said manifold which form an extrusion passageway leading from said manifold; a set of lips forming an elongated extrusion orifice extending substantially the entire width of the die with said set of lips in communication with said extrusion passageway; two channeled die endplates, one attached to each end of said body encapsulating said manifold, extrusion passageway and die lips, each channeled die endplate comprising a base plate having a principal cavity and a channel leading therefrom, said principal cavity being aligned with the respective ends of the manifold and said channel being aligned with the respective ends of said extrusion passageway.
Inventors
- 👤 A Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:14
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
166 words
A flat film extrusion die comprising: a body having 1. means defining an inlet recess; 2. a longitudinally extending passageway communicating with said recess; 3. an extrusion manifold extending substantially the entire width of the die in flow communication with said longitudinally extending passageway; 4. opposed wall portions in flow communication with said manifold which form an extrusion passageway leading from said manifold; 5. a set of lips forming an elongated extrusion orifice extending substantially the entire width of the die with said set of lips in communication with said extrusion passageway; and 6. two channeled die endplates, one attached to each end of said body encapsulating said manifold, extrusion passageway, and die lips, each channeled die endplate comprising a base plate having a principal cavity and a channel leading therefrom, said principal cavity being aligned with the end of the manifold and said channel being aligned with the end of said extrusion passageway and terminating at a point intermediate the manifold and the die lips.
Claim 2
Dependent Claim
166 words
A flat film extrusion die comprising: a body having 1. means defining an inlet recess; 2. a longitudinally extending passageway communicating with said recess; 3. an extrusion manifold extending substantially the entire width of the die in flow communication with said longitudinally extending passageway; 4. opposed wall portions in flow communication with said manifold which form an extrusion passageway leading from said manifold; 5. a set of lips forming an elongated extrusion orifice extending substantially the entire width of the die with said set of lips in communication with said extrusion passageway; and 6. two channeled die endplates, one attached to each end of said body encapsulating said manifold, extrusion passageway, and die lips, each channeled die endplate comprising a base plate having a principal cavity and a channel leading therefrom, said principal cavity being aligned with the end of the manifold and said channel being aligned with the end of said extrusion passageway and terminating at a point intermediate the manifold and the die lips.
Claim 3
Dependent Claim
26 words
The die of claim 1 wherein the channel of each of said channeled die endplates is flared outwardly to become contiguous with its respective principal cavity.
Claim 4
Dependent Claim
8 words
a longitudinally extending passageway communicating with said recess;
Claim 5
Dependent Claim
8 words
a longitudinally extending passageway communicating with said recess;
Claim 6
Dependent Claim
19 words
an extrusion manifold extending substantially the entire width of the die in flow communication with said longitudinally extending passageway;
Claim 7
Dependent Claim
19 words
an extrusion manifold extending substantially the entire width of the die in flow communication with said longitudinally extending passageway;
Claim 8
Dependent Claim
29 words
The die of claim 1 wherein said principal cavity of each of said channeled die endplates is generally hemispherical and each channel leading respectively therefrom is generally U shaped.
Claim 9
Dependent Claim
33 words
The channeled endplates of claim 3 wherein each of the channels decreases in width and depth from its flared junction with the principal cavity until it becomes flush with its respective base plate.
Claim 10
Dependent Claim
18 words
opposed wall portions in flow communication with said manifold which form an extrusion passageway leading from said manifold;
Claim 11
Dependent Claim
18 words
opposed wall portions in flow communication with said manifold which form an extrusion passageway leading from said manifold;
Claim 12
Dependent Claim
29 words
a set of lips forming an elongated extrusion orifice extending substantially the entire width of the die with said set of lips in communication with said extrusion passageway; and
Claim 13
Dependent Claim
29 words
a set of lips forming an elongated extrusion orifice extending substantially the entire width of the die with said set of lips in communication with said extrusion passageway; and
Claim 14
Dependent Claim
72 words
two channeled die endplates, one attached to each end of said body encapsulating said manifold, extrusion passageway, and die lips, each channeled die endplate comprising a base plate having a principal cavity and a channel leading therefrom, said principal cavity being aligned with the end of the manifold and said channel being aligned with the end of said extrusion passageway and terminating at a point intermediate the manifold and the die lips.
Claim 15
Dependent Claim
72 words
two channeled die endplates, one attached to each end of said body encapsulating said manifold, extrusion passageway, and die lips, each channeled die endplate comprising a base plate having a principal cavity and a channel leading therefrom, said principal cavity being aligned with the end of the manifold and said channel being aligned with the end of said extrusion passageway and terminating at a point intermediate the manifold and the die lips.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |