Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1987-02-25
1988-12-27
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264174, 264211, 264245, 264349, 366 90, 366 99, 366307, 425113, 4251311, 425205, 425207, B29C 4704, B29C 4764
Patent
active
047939575
ABSTRACT:
Material to be colored is fed from an extruder to a positive displacement means such as a gear pump. The output from which is split into at least two streams one of which is fed to a mixer which is preferably a cavity transfer mixer. Colorant is injected into one of the streams either before or at the mixer and the two streams are recombined downstream of the mixer preferably in a diehead. The arrangement provides for reliable coloration whilst premitting flexibility in production.
REFERENCES:
patent: 3800985 (1974-04-01), Grout et al.
patent: 3817675 (1974-06-01), Maiocco
patent: 4182601 (1980-01-01), Hill
patent: 4336213 (1982-06-01), Fox
patent: 4338274 (1982-07-01), Hill
patent: 4419014 (1983-12-01), Gale
patent: 4501498 (1985-02-01), McKelvey
patent: 4595546 (1986-06-01), Wheeler, Jr.
patent: 4642040 (1987-02-01), Fox
Francis Shaw & Co. (Manchester) Ltd.
Thurlow Jeffery
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