US3884611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die
Assignee: Leesona Corp
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Filing: 1973-10-24
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Granted: 1975-05-20
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Expires: 1993-10-24
Abstract
Abstract A novel construction of an extrusion die is disclosed wherein an integral portion of one of the die segments which defines a flow channel is deformable in such a manner so as to provide dimensional changes in such flow channel along the width thereof. Adjustment means are also provided so that the dimensional alterations may be controlled along the width of the die in such a manner so as to control the flow of thermoplastic material therethrough.
Inventors
- 👤 John W Anderson
- 👤 John J Barney
- 👤 James J Flanagan
- 👤 Vernon Krupa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:57
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/313; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/255; B29C48/2556; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/9258; B29C2948/926; B29C2948/92609; B29C2948/92819; B29C2948/92857; B29C2948/92904; B29K; B29K2995/00; B29K2995/0037; B29K2995/0072; B29K2995/0073
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
105 words
A die for the extrusion of thermoplastic materials comprising a plurality of die components defining an internal plastic flow distribution channel of relatively thin flat configuration, said channel being upstream and removed from the exit portion of said die, one of said die components having an integral segment thereof adjacent said channel and in part defining said channel so as to insure a smooth uninterrupted flow path, said segment deformable so as to modify the cross-sectional configuration of said channel upstream of said exit portion a distance to produce significant thermoplastic material flow control effective at said exit portion and means for deforming said segment.
Claim 2
Dependent Claim
105 words
A die for the extrusion of thermoplastic materials comprising a plurality of die components defining an internal plastic flow distribution channel of relatively thin flat configuration, said channel being upstream and removed from the exit portion of said die, one of said die components having an integral segment thereof adjacent said channel and in part defining said channel so as to insure a smooth uninterrupted flow path, said segment deformable so as to modify the cross-sectional configuration of said channel upstream of said exit portion a distance to produce significant thermoplastic material flow control effective at said exit portion and means for deforming said segment.
Claim 3
Dependent Claim
19 words
The die construction of claim 1 wherein said segment is deformable substantially entirely across the width of said channel.
Claim 4
Dependent Claim
44 words
The die construction of claim 2 wherein said means for deforming said segment comprises a plurality of individual adjusting means for either moving associated portions of said segment towards said channel to reduce its cross-section or away from said channel to increase its cross-section.
Claim 5
Dependent Claim
27 words
The die construction of claim 3 wherein said individual adjusting means are positioned in alternating relationship to each other substantially entirely across the width of said channel.
Claim 6
Dependent Claim
126 words
A die for the extrusion of thermoplastic materials comprising, a plurality of die components defining a plastic flow channel, said plastic flow channel having an entrance portion, a distribution portion and an exit slot portion, said distribution portion being generally of relatively thin flat configuration, one of said die components having an integral segment thereof adjacent said channel and in part defining said distribution portion so as to insure a smooth uninterrupted flow path, said segment deformable so as to modify a portion of the cross-sectional configuration of the distribution portion of said channel upstream of said exit portion a distance to produce significant thermoplastic material flow control effective at said exit portion without modifying the exit slot portion thereof, and means for deforming said segment.
Claim 7
Dependent Claim
126 words
A die for the extrusion of thermoplastic materials comprising, a plurality of die components defining a plastic flow channel, said plastic flow channel having an entrance portion, a distribution portion and an exit slot portion, said distribution portion being generally of relatively thin flat configuration, one of said die components having an integral segment thereof adjacent said channel and in part defining said distribution portion so as to insure a smooth uninterrupted flow path, said segment deformable so as to modify a portion of the cross-sectional configuration of the distribution portion of said channel upstream of said exit portion a distance to produce significant thermoplastic material flow control effective at said exit portion without modifying the exit slot portion thereof, and means for deforming said segment.
Claim 8
Dependent Claim
40 words
The die construction of claim 5 wherein said distribution portion includes a manifold portion, a pre-land portion and a secondary distribution portion and wherein the cross-sectional configuration of said pre-land portion is variable by means of said deformable die segment.
Claim 9
Dependent Claim
27 words
The die construction of claim 6 wherein that portion of said die segment in part forming said pre-land portion of said channel is of relatively thin construction.
Claim 10
Dependent Claim
41 words
The die construction of claim 7 wherein said pre-land die segment portion includes a downwardly extending boss positioned intermediate the flow directional extent of said pre-land die segment portion, and wherein said means for deforming said segment operates on said boss.
Claim 11
Dependent Claim
23 words
The die construction of claim 5 wherein said segment is deformable substantially entirely across the width of said distribution portion of said channel.
Claim 12
Dependent Claim
48 words
The die construction of claim 9 wherein said means for deforming said segment comprises a plurality of individual adjusting means for either moving associated portions of said segment towards said channel to reduce its cross-section or away from said distribution portion of said channel to increase its cross-section.
Claim 13
Dependent Claim
31 words
The die construction of claim 10 wherein said individual adjusting means are positioned in alternating relationship to each other substantially entirely across the width of said distribution portion of said channel.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |