Patent US3871812A successfully refreshed from Google Patents.
US3871812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam extrusion die
Assignee: Individual
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Filing: 1972-08-02
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Granted: 1975-03-18
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Expires: 1992-08-02
Abstract
Abstract An extrusion die is disclosed. The die has four adjustable lips in the form of two substantially identical pairs of lips. The lips are adjustable toward and away from each other to form extruded shapes such as boards, planks and logs. One pair of lips may be in the form of laterally spaced keys.
Inventors
- 👤 Arthur L Phipps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:27
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/505
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
173 words
An extrusion die for extruding a homogeneous distribution of foaming polymeric material comprising, having the property of changing shape after it leaves said die, two spaced lips fixed to said die and extending therefrom disposed substantially in two parallel planes, the edge of said lips remote from said die defining an exit passage for said material, said lips extending beyond the end of said die in spaced relation to each other providing an open space there-between for material to move laterally relative to said lips, means supporting said lips on said die, and means to adjust the position of said lips relative to each other to control the shape of said passage, said exit passage being generally in the shape of a bow tie having inwardly curving sides, said lips are movably connected to said die to swing about spaced parallel axes whereby said lips may be moved to converge toward each other or to diverge from each other, and means to hold said lips selectively in converging position or in diverging position.
Claim 2
Dependent Claim
173 words
An extrusion die for extruding a homogeneous distribution of foaming polymeric material comprising, having the property of changing shape after it leaves said die, two spaced lips fixed to said die and extending therefrom disposed substantially in two parallel planes, the edge of said lips remote from said die defining an exit passage for said material, said lips extending beyond the end of said die in spaced relation to each other providing an open space there-between for material to move laterally relative to said lips, means supporting said lips on said die, and means to adjust the position of said lips relative to each other to control the shape of said passage, said exit passage being generally in the shape of a bow tie having inwardly curving sides, said lips are movably connected to said die to swing about spaced parallel axes whereby said lips may be moved to converge toward each other or to diverge from each other, and means to hold said lips selectively in converging position or in diverging position.
Claim 3
Dependent Claim
49 words
The die recited in claim 1 wherein two second lips are provided, said second lips being disposed in two planes generally parallel to each other and perpendicular to the planes which contain said first mentioned lips, and means to adjust said second lips toward and away from each other.
Claim 4
Dependent Claim
23 words
The die recited in claim 1 wherein means is provided on said die to adjust said lips toward and aWay from each other.
Claim 5
Dependent Claim
42 words
The die recited in claim 1 wherein said lips are spaced from each other and define a gap extending around the periphery of said lips from adjacent one end of said pivot to a position adjacent the other end of said pivot.
Claim 6
Dependent Claim
27 words
The die recited in claim 4 wherein said lips are straight along the edge adjacent said pivotal axes, and said lips curve outwardly from said pivotal axes.
Claim 7
Dependent Claim
20 words
The die recited in claim 5 wherein said curve outwardly from said axes is substantially the form of a semi-circle.
Claim 8
Dependent Claim
44 words
The die recited in claim 1 wherein said die is made from a hollow member having a substantially hemispherical end, and means is provided on said die for attaching said die to an extrusion means and a bow-tie shaped gap in said hemispherical end.
Claim 9
Dependent Claim
25 words
The die recited in claim 1 wherein said die has four lips and said lips terminate at their distal end in a convex shaped end.
Claim 10
Dependent Claim
34 words
The die recited in claim 4 wherein said lips are substantially straight along the edge adjacent said pivotal axes, and said lips extend outwardly from said pivotal axes in the form of a paraboloid.
Claim 11
Dependent Claim
34 words
The die recited in claim 4 wherein said lips are substantially straight along the edge adjacent said pivotal axes, and said lips extend outwardly from said pivotal axes in the form of a triangle.
Claim 12
Dependent Claim
49 words
The die recited in claim 1 wherein said die is made from a hollow member having an end substantially in the form of a paraboloid, and means is provided on said die for attaching said die to an extrusion means and a bow-tie shaped gap in said parabolic end.
Claim 13
Dependent Claim
49 words
The die recited in claim 1 wherein said die is made from a hollow member having an end substantially in the form of a cone, and means is provided on said die for attaching said die to an extrusion means and a bow-tie shaped gap in said conical end.
Claim 14
Dependent Claim
125 words
An extrusion die for extruding foaming material comprising, two spaced plates, means supporting said spaced plates in spaced relation to each other, lips, said lips being generally semi-circular in shape, said lips each having the side thereof adjacent the other said lip recessed to form a cavity, said cavity being defined by a generally flat perimeter surface joining a surface extending inward toward the center of said lip and toward the side of said lip opposite said cavity, means for supporting said lips on said die between said spaced plates, and means to adjust said lips toward and away from each other and to adjust the inclination of said lips relative to each other whereby a gap defined between said lips is varied in shape.
Claim 15
Dependent Claim
125 words
An extrusion die for extruding foaming material comprising, two spaced plates, means supporting said spaced plates in spaced relation to each other, lips, said lips being generally semi-circular in shape, said lips each having the side thereof adjacent the other said lip recessed to form a cavity, said cavity being defined by a generally flat perimeter surface joining a surface extending inward toward the center of said lip and toward the side of said lip opposite said cavity, means for supporting said lips on said die between said spaced plates, and means to adjust said lips toward and away from each other and to adjust the inclination of said lips relative to each other whereby a gap defined between said lips is varied in shape.
Claim 16
Dependent Claim
66 words
The die recited in claim 13 wherein said means to support said lips on said die comprises a bore in each said lip, a rod extending through said bore and supported on said die, said bore through said lip being substantially larger than said rod, and means to adjust the position of said lips on said rod whereby said lips are adjusted relative to each other.
Claim 17
Dependent Claim
19 words
The die recited in claim 14 wherein said means to adjust said lips relative to each other comprises bolts.
Claim 18
Dependent Claim
35 words
The die recited in claim 15 wherein jacking screws are threadably supported in said plates and extend through and engage said lips whereby said lips may be rocked relative to each other on said rods.
Claim 19
Dependent Claim
25 words
The die recited in claim 13 wherein said lips define a gap having four edges, said four edges curve toward the others at their center.
Claim 20
Dependent Claim
16 words
The die recited in claim 13 wherein said lips are of approximately equal length and width.
Claim 21
Dependent Claim
29 words
The die recited in claim 13 wherein the ends of said lips are arcuate in shape and the center part of said ends curves inwardly toward the other end.
Claim 22
Dependent Claim
31 words
The die recited in claim 13 wherein all sides of said lips are arcuate in shape and said arcuate shapes curve toward each other whereby a bow-tie shaped gap is defined.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |