Patent US4334783A successfully refreshed from Google Patents.
US4334783A
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US
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Mixing device
Assignee: Resonac Holdings Corp
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Filing: 1979-12-17
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Granted: 1982-06-15
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Expires: 1999-12-17
Abstract
Abstract A mixing device is presented which is suitable for use in the uniform mixing of polymer substances or the uniform mixing of polymer substances with, for example, fillers. This mixing device is composed of one mixing nozzle or two or more mixing nozzles mounted in parallel, which mixing nozzle comprises an orifice portion and an upstream compression zone and/or a downstream diffusion zone. A ratio of the maximum opening cross-sectional area of the compression zone or the diffusion zone to the minimum opening cross-section area of the orifice portion is 10:1 or more.
Inventors
- 👤 Yukinori Suzaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:00
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/433; B29; B29B; B29B7/00; B29B7/30; B29B7/32; B29B7/325; B01F23/00; B01F23/40; B01F23/47; B01F25/4335; B01F25/45; B01F25/452; B01F25/4521; B01F25/45211; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/25; B29C48/30; B29C48/345; B29C48/36; B29C48/362; C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; D; D01; D01D; D01D5/00; D01D5/28; B29C48/05; B29K; B29K2105/00; B29K2105/06; B29K2105/12; Y; Y10; Y10S; Y10S425/00; Y10S425/049
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
A mixing device suitable for use in the uniform mixing of polymer substances in a molten state, said mixing device including at least one mixing nozzle comprising (i) an orifice portion and (ii) at least one zone selected from an upstream compression zone and a downstream diffusion zone, wherein the ratio of the maximum opening cross-sectional area of said zone to the minimum opening cross-sectional area of the orifice portion is 100 or more; and the axial length of said zone is not less than 2√S 2 /π mm, wherein S 2 is the minimum opening cross-sectional area of said orifice portion.
Claim 2
Dependent Claim
102 words
A mixing device suitable for use in the uniform mixing of polymer substances in a molten state, said mixing device including at least one mixing nozzle comprising (i) an orifice portion and (ii) at least one zone selected from an upstream compression zone and a downstream diffusion zone, wherein the ratio of the maximum opening cross-sectional area of said zone to the minimum opening cross-sectional area of the orifice portion is 100 or more; and the axial length of said zone is not less than 2√S 2 /π mm, wherein S 2 is the minimum opening cross-sectional area of said orifice portion.
Claim 3
Dependent Claim
26 words
A mixing device as claimed in claim 1, wherein the minimum opening cross-sectional area of the orifice portion is not more than 20 mm 2 .
Claim 4
Dependent Claim
17 words
A mixing device according to claim 1 which is mounted in the head portion of an extruder.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |