US3753637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled-cutter hot-die pelletizer
Assignee: Somerset Technologies Inc
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Filing: 1972-02-14
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Granted: 1973-08-21
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Expires: 1992-02-14
Abstract
Abstract Described herein is apparatus for pelletizing thermoplastic extrudable materials utilizing a fish-tail type die and a rotating-cylinder type cutter wherein cooling of the cutter is effected without cooling of the die.
Inventors
- 👤 J Gasior
- 👤 A Pomper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:33
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/065; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/25; B26D1/34; B26D1/36; B29B7/00; B29B7/30; B29B7/58; B29B7/582; B29B7/80; B29B7/82; B29B7/826; B29C; B29C48/00; B29C2793/00; B29C2793/0027; B29C2793/009; B29C48/001; B29C48/0022; B29C48/03; B29C48/04; Y; Y10; Y10T; Y10T83/00; Y10T83/242; Y10T83/283; Y10T83/293
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
164 words
Apparatus for pelletizing thermoplastic resin material plasticized and extruded from an extruder comprising: an extrusion die assembly adapted for connecting with an extruder including a dieplate having a plurality of orifices terminating in a dieface and spaced along a plane in a direction transverse to the direction of extrusion; rotary cutter and means supporting the cutter for rotation about an axis extending along said plane in spaced relation with said face, said cutter having one or more cutting edges extending lengthwise of said axis and sweeping, during rotation of the cutter, a surface revolution in close proximity with said face and the termini of said orifices; and dispensing means supported outside said surface of revolution for directing a cooling liquid into said surface of revolution in tangential relation with a surface of revolution inwardly concentric to said first named surface of revolution to effect substantial contact with said cutting edges and in a direction such that the cooling liquid does not contact said orifices.
Claim 2
Dependent Claim
164 words
Apparatus for pelletizing thermoplastic resin material plasticized and extruded from an extruder comprising: an extrusion die assembly adapted for connecting with an extruder including a dieplate having a plurality of orifices terminating in a dieface and spaced along a plane in a direction transverse to the direction of extrusion; rotary cutter and means supporting the cutter for rotation about an axis extending along said plane in spaced relation with said face, said cutter having one or more cutting edges extending lengthwise of said axis and sweeping, during rotation of the cutter, a surface revolution in close proximity with said face and the termini of said orifices; and dispensing means supported outside said surface of revolution for directing a cooling liquid into said surface of revolution in tangential relation with a surface of revolution inwardly concentric to said first named surface of revolution to effect substantial contact with said cutting edges and in a direction such that the cooling liquid does not contact said orifices.
Claim 3
Dependent Claim
46 words
The apparatus of claim 1 comprising: a housing enclosing said face and said cutter; heat and liquid shielding means located outside said surface of revolution covering said face except for said orifice termini and small areas defining said orifices in said face traversed by the cutter.
Claim 4
Dependent Claim
56 words
The apparatus of claim 2 wherein: said shielding means comprises a thin-gauge meterial; and said orifices terminate in a narrow projection of the faceplate raised to an extent at least equalling the thickness of the shielding means with respect to the adjacent portions of the face, and the shielding means abuts the sides of said projection.
Claim 5
Dependent Claim
29 words
The apparatus of claim 1 wherein: said assembly comprises a diebody and said plate normally secured together provides elongate bores generally parallel to said axis for receiving heating means.
Claim 6
Dependent Claim
74 words
The apparatus of claim 1 wherein: said dispensing means comprises a manifold extending generally parallel to said axis in the clear of said cutter, and a plurality of jets mounted thereon and spaced therealong, some of said jets being mist discharging jets directed into said surface of revolution and the remainder of said jets arranged to direct a sheet of liquid transversely of the path of pellets developed in the operation of said cutter.
Claim 7
Dependent Claim
46 words
The apparatus of claim 1 wherein: said cutter blade means defining said cutting edges and a front surface adjacent each cutting edge which has an angle of approximately 20* with respect to a plane extending perpendicularly to said dieface when its corresponding edge is centered thereover.
Claim 8
Dependent Claim
46 words
The apparatus of claim 1 wherein: said cutter comprises a base member of trans-axial polygonal cross section to provide planate surfaces, and each of said cutting edges is defined by a blade secured to one of said planate surfaces to extend radially outwardly from said base.
Claim 9
Dependent Claim
47 words
The apparatus of claim 7 wherein: the portion of each blade extending radially outward from said base has a front face having an angle of approximately 20* with respect to said plane perpendicular with said dieface when the blade having said face is centered over the dieface.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |