Four wing, non-intermeshing rotors for synchronous drive to provide improved dispersive and distributive mixing in internal batch mixers

Patent 6494607 Issued on December 17, 2002. Estimated Expiration Date:

May 4, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Two-wing non-intermeshing rotors of increased performance for use in internal batch mixing machines
Patent #: 4714350
Issued on: 12/22/1987
Inventor: Nortey

Internal batch mixing machines with non-intermeshing rotors of increased performance
Patent #: 4744668
Issued on: 05/17/1988
Inventor: Nortey

Optimized four-wing, non-intermeshing rotors for synchronous drive at optimum phase relation in internal batch mixing machines
Patent #: 4834543
Issued on: 05/30/1989
Inventor: Nortey

Mixing machine with non-intermeshing pair of rotors driven solely at the same rotor speed in opposite directions and having a predetermined rotational alignment relationship between the two counter-rotating rotors
Patent #: 4893936
Issued on: 01/16/1990
Inventor: Borzenski, et al.

Closed type kneader
Patent #: 5044760
Issued on: 09/03/1991
Inventor: Asai

Internal batch mixing machines and rotors Patent #: 6402360
Issued on: 06/11/2002
Inventor: Nortey

Inventors

Assignee

Farrel Corporation

Application

No. 849058 filed on 05/04/2001

US Classes:

366/84In parallel intercommunicating mixing chambers

Examiners

Primary: Cooley, Charles E.
Assistant: Sorkin, David

Attorney, Agent or Firm

Foreign Patent References

738787 DE. 07/25/2013

International Class

B29B 007/18

Abstract

Four wing rotors for used in an internal batch mixer. The rotor has two long wings, and these two long wings have different approach angles and helix angles. The rotor has two short wings and these short wings also preferably have different helix angles and approach angles. The rotors provide improved distributive and dispersive mixing allowing for greater productivity in processing materials and producing more homogeneously mixed materials at lower discharge temperatures.

Other References

Rubber & Plastics News, pp. 18-20, Oct. 18, 1999
N. Nortey, "Enhanced Mixing in Intermeshing Batch Mixer", Paper # 70, Rubber Division, American Chemical Society, Sep. 29-Oct. 2, 1998
PCT Search report of PCT/US02/0610