US3706518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die deckle means
Assignee: Egan Machinery Co
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Filing: 1971-06-17
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Granted: 1972-12-19
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Expires: 1991-06-17
Abstract
Abstract An extrusion die having a discharge orifice in the form of a relatively long narrow slot and adapted to extrude a film or sheet of a flowable plastic material. The die is equipped with external deckle means adjustable positioned along the outer end of the discharge orifice and internal deckle means adjustable positioned along the inner end of the discharge orifice. The external and internal deckle means are adjustable in unison or separately, as desired, along corresponding ends of the discharge orifice. The die and the external and internal deckle means are so constructed and arranged as to effectively regulate and control both the width and the thickness of a plastic film or sheet that is extruded from the die.
Inventors
- 👤 William S Bunte
- 👤 Lino E Degasperis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:37
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
In combination with a die for extruding a film or sheet of flowable plastic material and having a discharge orifice in the form of a relatively long narrow slot, said orifice having an inlet coextensive with the length of the slot and communicating with a manifold for containing a supply of the plastic material in a molten state and having an outlet coextensive with the length of the slot and communicating with the atmosphere, a. external deckle means carried by the die and sealing an end portion of the orifice outlet, b. internal deckle means extending into the die and sealing an end portion of the orifice inlet corresponding to said end portion of the die orifice, said internal and external deckle means being slidable along portions of the die which respectively define the orifice inlet and the orifice outlet, and c. coupling means releasably connecting the internal deckle means to the external deckle means to permit adjustment of both deckle means relative to the die in unison.
Claim 2
Dependent Claim
168 words
In combination with a die for extruding a film or sheet of flowable plastic material and having a discharge orifice in the form of a relatively long narrow slot, said orifice having an inlet coextensive with the length of the slot and communicating with a manifold for containing a supply of the plastic material in a molten state and having an outlet coextensive with the length of the slot and communicating with the atmosphere, a. external deckle means carried by the die and sealing an end portion of the orifice outlet, b. internal deckle means extending into the die and sealing an end portion of the orifice inlet corresponding to said end portion of the die orifice, said internal and external deckle means being slidable along portions of the die which respectively define the orifice inlet and the orifice outlet, and c. coupling means releasably connecting the internal deckle means to the external deckle means to permit adjustment of both deckle means relative to the die in unison.
Claim 3
Dependent Claim
13 words
The combination according to claim 1 wherein a. the external deckle means comprises
Claim 4
Dependent Claim
30 words
The combination according to claim 2 wherein the portion of the rod within the die is rectilinear and, except for said end part, right circular cylindrical in transverse cross section.
Claim 5
Dependent Claim
64 words
The combination according to claim 1 wherein the internal deckle means comprises a rod including rectilinear first and second parts within the die, said first part being right circular cylindrical in transverse cross section, said second part being an extension of the first part and constituting an end of the rod, said second part being provided with a plurality of angularly spaced converging grooves.
Claim 6
Dependent Claim
28 words
The combination according to claim 4 wherein each of said grooves is defined by a pair of substantially planar converging and intersecting surfaces that are triangular in configuration.
Claim 7
Dependent Claim
40 words
The combination according to claim 5 wherein the line of intersection of each of said grooves intersects the corresponding lines of intersection of the other grooves at a point which is substantially coincident with the longitudinal axis of the rod.
Claim 8
Dependent Claim
32 words
The combination according to cLaim 4 wherein the second part is provided with first and second pairs of oppositely disposed converging grooves which are equi-spaced about the longitudinal axis of the rod.
Claim 9
Dependent Claim
50 words
The combination according to claim 7 wherein each of said grooves is defined by a pair of substantially planar converging and intersecting surfaces that are triangular in configuration, the lines of intersection of said groove surfaces intersecting at a point which is substantially coincident with said axis of the rod.
Claim 10
Dependent Claim
39 words
The combination according to claim 8 wherein the second part tapers inwardly in the direction of its free end and the peripheral surfaces of the second part are elements of the surface of revolution of a right circular cone.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |