Patent US3817675A successfully refreshed from Google Patents.
US3817675A
Expired / Lapsed
US
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Apparatus for dispensing colorant in plasticized thermoplastic material
Assignee: Deacon Machinery Inc
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Filing: 1972-06-15
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Granted: 1974-06-18
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Expires: 1992-06-15
Abstract
Abstract An improved thermoplastic article forming apparatus is detailed in which an interfacial surface generator mixing means is coupled to the plasticizing means to provide a resultant thermoplastic mix which has the desired degree of homogeneity.
Inventors
- 👤 H Maiocco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:36
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/58; B29C45/581; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B29C48/00; B29C48/25; B29C48/36; B29C48/362; B29C48/50; B29C48/505; B29C48/625; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92742; B29C2948/92752; B29C2948/92819; B29C2948/92828; B29C48/03
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
In a thermoplastic article forming apparatus including thermoplastic resin feed means, plasticizing means and article forming means, the improvement comprising coupling the inlet of an interfacial surface generator to the outlet of the plasticizing means, said plasticizing means comprising an adiabatic screw extrusion means having a low length to diameter ratio and being operable at high rotational speed.
Claim 2
Dependent Claim
58 words
In a thermoplastic article forming apparatus including thermoplastic resin feed means, plasticizing means and article forming means, the improvement comprising coupling the inlet of an interfacial surface generator to the outlet of the plasticizing means, said plasticizing means comprising an adiabatic screw extrusion means having a low length to diameter ratio and being operable at high rotational speed.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 including means for feeding and metering a predetermined amount of colorant material at the inlet of the interfacial surface generator.
Claim 4
Dependent Claim
40 words
The apparatus of claim 1 wherein the adiabatic screw extruder has a ratio of length to diameter of about 10 to 1 or less, and the screw is rotatable at a speed of at least about 300 revolutions per minute.
Claim 5
Dependent Claim
37 words
The apparatus of claim 2 wherein the interfacial surface generator is provided with a sufficient number of stages whereby the colorant material is homogenously dispersed throUghout the plasticized mixture whereby uniformly colored thermoplastic articles may be formed.
Claim 6
Dependent Claim
45 words
The apparatus of claim 2 wherein the interfacial surface generator is provided with a sufficient number of stages to permit only a limited degree of colorant material dispersion through the plasticized mixture whereby thermoplastic articles having a mottled or marbelized color characteristic may be formed.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |