US4456381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed type mixing/kneading apparatus
Assignee: Kobe Steel Ltd
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Filing: 1981-02-17
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Granted: 1984-06-26
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Expires: 2001-02-17
Abstract
Abstract Disclosed is a closed type mixing and kneading apparatus with two juxtaposed double-wing rotors providing increased mixing and increased shearing action. One of the wings of each rotor has a length ratio of 0.6 to 0.9 relative to the total length of the rotor at a twist angle of 10° to 40°. The two wings of each rotor are overlapped by between 0.2 and 0.8 times the total length of the rotor.
Inventors
- 👤 Kimio Inoue
- 👤 Tsugushi Fukui
- 👤 Toshihiro Asai
- 👤 Kazuhiko Nakagawa
- 👤 Akimasa Kuriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:53
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/02; B29B7/06; B29B7/10; B29B7/18; B29B7/183; B29B7/186; B29B7/30; B29B7/34; B29B7/38; B29B7/46; B29B7/465; B29B7/74; B29B7/7476; B29B7/7495; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/64; B29C48/65; B29C48/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
A closed type mixing and kneading apparatus having within a mixing chamber a pair of juxtaposed double-wing rotors defining an intercommunicating portion of said chamber therebetween, each one of said rotors having the respective wings thereof twisted to move a charged material inward from one end of said mixing chamber, one of the wings of each rotor having a length ratio of 0.6-0.9 relative to the total length of said rotor and a twist angle of 10°14 40°, said two wings being overlapped by 0.2-0.8 of the total length of said rotor, whereby increased mixing or shearing action is produced in said intercommunicating joint portion.
Claim 2
Dependent Claim
105 words
A closed type mixing and kneading apparatus having within a mixing chamber a pair of juxtaposed double-wing rotors defining an intercommunicating portion of said chamber therebetween, each one of said rotors having the respective wings thereof twisted to move a charged material inward from one end of said mixing chamber, one of the wings of each rotor having a length ratio of 0.6-0.9 relative to the total length of said rotor and a twist angle of 10°14 40°, said two wings being overlapped by 0.2-0.8 of the total length of said rotor, whereby increased mixing or shearing action is produced in said intercommunicating joint portion.
Claim 3
Dependent Claim
39 words
An apparatus as set forth in claim 1, wherein said wings of each of said rotors have a length ratio of 0.65-0.85, a twist angle of 15°-35° and an overlap of 0.3-0.7 of the total length of said rotor.
Claim 4
Dependent Claim
130 words
A closed type mixing and kneading apparatus having within a mixing chamber a pair of juxtaposed double-wing rotors defining an intercommunicating portion of said chamber therebetween, each of said rotors having the respective wings thereof twisted to move a charged material inward from one end of said mixing chamber, said wings of each rotor satisfying the following conditions: ##EQU10## in which l1, l2: axial lengths of the two wings L: length of the rotors θ.sub. : twist angle of the wings Ho: clearance between the rotor body and barrel α: ratio of the length of an open wing portion to L Bo: volume of the mixing chamber BF: stowage of the material D: diameter of the barrel, whereby increased mixing or shearing action is produced in said intercommunicating joint portion.
Claim 5
Dependent Claim
130 words
A closed type mixing and kneading apparatus having within a mixing chamber a pair of juxtaposed double-wing rotors defining an intercommunicating portion of said chamber therebetween, each of said rotors having the respective wings thereof twisted to move a charged material inward from one end of said mixing chamber, said wings of each rotor satisfying the following conditions: ##EQU10## in which l1, l2: axial lengths of the two wings L: length of the rotors θ.sub. : twist angle of the wings Ho: clearance between the rotor body and barrel α: ratio of the length of an open wing portion to L Bo: volume of the mixing chamber BF: stowage of the material D: diameter of the barrel, whereby increased mixing or shearing action is produced in said intercommunicating joint portion.
Claim 6
Independent Claim
47 words
The apparatus of claims 1 or 3 wherein the angular sense of said twist angle of one wing of each rotor of said pair of rotors is opposite the angular sense of said twist angle of the other wing of each rotor of said pair of rotors.
Claim 7
Dependent Claim
40 words
The apparatus of claim 4 wherein said rotors are angularly positioned in said mixing chamber such that wings of said pair of rotors having the same angular sense face one another at any rotational angle of said pair of rotors.
Claim 8
Dependent Claim
40 words
The apparatus of claim 4 wherein said rotors are angularly positioned in said mixing chamber such that wings of said pair of rotors having the opposite angular sense face one another at any rotational angle of said pair of rotors.
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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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |