Patent US3867082A successfully refreshed from Google Patents.
US3867082A
Expired / Lapsed
US
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A granulating device for granulating synthetic plastics material in a flowable stage
Assignee: Werner and Pfleiderer GmbH
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Filing: 1973-07-23
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Granted: 1975-02-18
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Expires: 1993-07-23
Abstract
Abstract There is disclosed an extrusion die for granulating synthetic plastic material in a flowable stage, and more particularly for under-water granulating of the material. The die includes a plurality of nozzle bores extending from the inlet side of the die to the extrusion side thereof. An insulation layer constituted by a gap is interposed between the inlet side and the extrusion side of the die so as to encompass the bores parallel to the same and also crosswise thereto. The extrusion side of the die is cooled by a flow of a coolant, usually water. The material to be granulated is pressure fed to the inlet side of the die and granulated as it emerges from the extrusion side by rotating knives.
Inventors
- 👤 Friedrich Lambertus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:22
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/065; B29B7/00; B29B7/30; B29B7/58; B29B7/582; B29B7/80; B29B7/82; B29B7/826; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/25; B29C48/30; B29C48/345; B29C48/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
143 words
A granulating device for granulaTing synthetic plastic material in a flowable stage, said device comprising: a generally plate-shaped extrusion die having an inlet side and an extrusion side, said die including a plurality of nozzle bores extending crosswise through the die and an insulation layer interposed between the inlet side and the extrusion side of the die, said insulation layer being constituted by a coherent gap extending lengthwise substantially parallel to said bores encompassing the same and also parallel to the extrusion side of the die; cooling means for cooling the extrusion side of said die; cutting means movable parallel and adjacent to the extrusion side of the die for cutting material emanating from the extrusion side of the die to effect granulation of the material; and feed means for pressure feeding material to be granulated to the inlet side of the die.
Claim 2
Dependent Claim
143 words
A granulating device for granulaTing synthetic plastic material in a flowable stage, said device comprising: a generally plate-shaped extrusion die having an inlet side and an extrusion side, said die including a plurality of nozzle bores extending crosswise through the die and an insulation layer interposed between the inlet side and the extrusion side of the die, said insulation layer being constituted by a coherent gap extending lengthwise substantially parallel to said bores encompassing the same and also parallel to the extrusion side of the die; cooling means for cooling the extrusion side of said die; cutting means movable parallel and adjacent to the extrusion side of the die for cutting material emanating from the extrusion side of the die to effect granulation of the material; and feed means for pressure feeding material to be granulated to the inlet side of the die.
Claim 3
Dependent Claim
56 words
The granulating device according to claim 1 wherein said extrusion die comprises two parts, each of said parts including portions of said nozzle bores, one of the parts containing the portion of the bores extending from the inlet side and the other part the portion of the bores extending from the extrusion side of the die.
Claim 4
Dependent Claim
84 words
The granulating device according to claim 1 wherein one part of the extrusion die including the portion of the bores extending from the inlet side of the extrusion die defines one side of said insulation gap and another part of the die is in the form of an insert including the portion of the bores extending from the extrusion side defines the other side of said insulation gap, said insert being an annular disc detachably secured to said one part of the extrusion die.
Claim 5
Dependent Claim
64 words
The granulating device according to claim 1 wherein said insulation gap is defined on one side by a part of the extrusion die including the portion of all the bores terminating at the extrusion side of the die and is defined on the other side by an annular insert including the portion of all the bores extending from the inlet side of the die.
Claim 6
Dependent Claim
15 words
The granulating device according to claim 4 wherein said annular insert is subdivided into segments.
Claim 7
Dependent Claim
52 words
The granulating device according to claim 1 wherein said insulation gap is defined by cylindrically-shaped inserts each including a portion of several bores extending from the inlet side of the die and by recesses in the body of the extrusion die, each of said recesses receiving therein one of said cylindrical inserts.
Claim 8
Dependent Claim
20 words
The granulating device according to claim 1 wherein a material having a low heat conductivity coefficient fills said insulation gap.
Claim 9
Dependent Claim
31 words
The granulating device according to claim 7 wherein said filler material in the insulation gap is the same synthetic plastic material as the material to be granulated with the granulating device.
Claim 10
Dependent Claim
46 words
The granulating device according to claim 1 wherein a synthetic plastic material having a low heat conductivity coefficient fills said insulation gap, said filler material having a softening temperature higher than the softening temperature of the synthetic plastic material to be granulated with the granulating device.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |