Patent US6691090B1 successfully refreshed from Google Patents.
US4088433A
Expired / Lapsed
US
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Extrusion die
Assignee: Honeywell UOP LLC
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Filing: 1977-02-25
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Granted: 1978-05-09
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Expires: 1997-02-25
Abstract
Abstract An extrusion die having a plurality of orifices arranged therein so that the number of orifices per unit area in the plane of the external die face is larger near the periphery of the die face than near the center thereof provides for the extrusion of material through all the die orifices at a relatively uniform linear velocity.
Inventors
- 👤 Howard D. Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:56
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/345; B29C48/03; B29C48/05; B29C48/04; B29C48/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
135 words
An extrusion die having at least 50 orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle encompasses no more than 90% of the orifices on said die face, and (c) said circle is defined by a radius of 7/8 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 7/8 inch multiplied by a positive integer.
Claim 2
Dependent Claim
135 words
An extrusion die having at least 50 orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle encompasses no more than 90% of the orifices on said die face, and (c) said circle is defined by a radius of 7/8 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 7/8 inch multiplied by a positive integer.
Claim 3
Dependent Claim
22 words
An extrusion die as defined in claim 1 wherein said die face is circular and said die contains at least 100 orifices.
Claim 4
Dependent Claim
32 words
An extrusion die as defined in claim 1 wherein said orifices, in the plane of the external die face, are of circular shape and of 0.02 - 0.10 in 2 cross-sectional area.
Claim 5
Dependent Claim
135 words
An extrusion die having at least fifty orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle encompasses no more than 90% of the orifices on said die face, and (c) said circle is defined by a radius of 9/16 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 9/16 inch multiplied by a positive integer.
Claim 6
Dependent Claim
135 words
An extrusion die having at least fifty orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle encompasses no more than 90% of the orifices on said die face, and (c) said circle is defined by a radius of 9/16 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 9/16 inch multiplied by a positive integer.
Claim 7
Dependent Claim
22 words
An extrusion die as defined in claim 4 wherein said die face is circular and said die contains at least 100 orifices.
Claim 8
Dependent Claim
32 words
An extrusion die as defined in claim 4 wherein said orifices, in the plane of the external die face, are of circular shape and of 0.02 - 0.10 in 2 cross-sectional area.
Claim 9
Dependent Claim
135 words
An extrusion die having at least fifty orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle encompasses no more than 90% of the orifices on said die face, and (c) said circle is defined by a radius of 0.5 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 0.5 inch multiplied by a positive integer.
Claim 10
Dependent Claim
135 words
An extrusion die having at least fifty orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle encompasses no more than 90% of the orifices on said die face, and (c) said circle is defined by a radius of 0.5 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 0.5 inch multiplied by a positive integer.
Claim 11
Dependent Claim
22 words
An extrusion die as defined in claim 7 wherein said die face is circular and said die contains at least 100 orifices.
Claim 12
Dependent Claim
32 words
An extrusion die as defined in claim 7 wherein said orifices, in the plane of the external die face, are of circular shape and of 0.02 - 0.10 in 2 cross-sectional area.
Claim 13
Dependent Claim
139 words
An extrusion die having at least fifty orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle is no larger than that necessary to encompass all of the orifices on said die face, and (c) said circle is defined by a radius of 0.5 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 0.5 inch multiplied by a positive integer.
Claim 14
Dependent Claim
139 words
An extrusion die having at least fifty orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle is no larger than that necessary to encompass all of the orifices on said die face, and (c) said circle is defined by a radius of 0.5 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 0.5 inch multiplied by a positive integer.
Claim 15
Dependent Claim
22 words
An extrusion die as defined in claim 10 wherein said die face is circular and said die contains at least 100 orifices.
Claim 16
Dependent Claim
32 words
An extrusion die as defined in claim 10 wherein said orifices, in the plane of the external die face, are of circular shape and of 0.02 - 0.10 in 2 cross-sectional area.
Claim 17
Dependent Claim
135 words
An extrusion die having a plurality of orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle encompasses no more than 90% of the orifices on said die face, and (c) said circle is defined by a radius of 3/4 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 3/4 inch multiplied by a positive integer.
Claim 18
Dependent Claim
135 words
An extrusion die having a plurality of orifices therein for the passage of extrudable material therethrough, said orifices being of equivalent cross-sectional area in the plane of the external die face and being arranged such that the orifice density in any first circle, drawn on said die face so that: (a) the center of said die face is the origin of said circle, (b) said circle encompasses no more than 90% of the orifices on said die face, and (c) said circle is defined by a radius of 3/4 inch multiplied by a positive integer greater than 1, is greater than the orifice density in any concentric second circle drawn on the die face of radius smaller than that of said first circle, but of length equal to 3/4 inch multiplied by a positive integer.
Claim 19
Dependent Claim
22 words
An extrusion die as defined in claim 13 wherein said die face is circular and said die contains at least 100 orifices.
Claim 20
Dependent Claim
32 words
An extrusion die as defined in claim 13 wherein said orifices, in the plane of the external die face, are of circular shape and of 0.02 - 0.10 in 2 cross-sectional area.
References Cited (Backward Citations)
FR755342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |