Title:
MIXING MACHINES
Document Type and Number:
WIPO Patent Application WO2000073033
Kind Code:
A3
Abstract:
A mixing machine has a mixing chamber in which there are disposed at least two rotors arranged for rotation in opposite directions about respective rotational axes. The rotors have a helical projection and are rotatable so as to present a leading face of the projection to the material being mixed. The leading face has a discontinuous profile along the axial direction of the rotor so as to define first and second portions. A majority of the leading face (17) of the first portion (12) is concave and a majority of the leading face (19) of the second portion (13) is convex. The circumferential length of a tip (W1, W2) surface of the projection increases in the axial length of the rotor. A clearance defined between the tip of the projection and a facing wall of the mixing chamber decreases in size in the direction of rotation of the rotor. The rotor profiles are designed to provide zones which act on a material to be mixed in different ways so as to improve overall mixing quality and efficiency.
Inventors:
FLETCHER JONATHAN BRIDGE (GB)
WOOD PETER R (GB)
WOOD PETER R (GB)
Application Number:
PCT/GB2000/002057
Publication Date:
February 22, 2001
Filing Date:
May 26, 2000
Export Citation:
Assignee:
CARTER BROS ROCHDALE LTD (GB)
FLETCHER JONATHAN BRIDGE (GB)
WOOD PETER R (GB)
FLETCHER JONATHAN BRIDGE (GB)
WOOD PETER R (GB)
International Classes:
B29B7/18; (IPC1-7): B29B7/18
Foreign References:
| EP0170397A1 | 1986-02-05 | |||
| US4914635A | 1990-04-03 | |||
| EP0848988A2 | 1998-06-24 | |||
| US1936248A | 1933-11-21 | |||
| US2559418A | 1951-07-03 | |||
| US2015618A | 1935-09-24 | |||
| US1200070A | 1916-10-03 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 10 31 October 1996 (1996-10-31)
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