Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work
Patent
1996-03-19
1998-09-01
Nagumo, Mark
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
264286, B29C 5302
Patent
active
058007652
ABSTRACT:
A material transfer arrangement having a pair of generally cylindrical adjacent rolls which are counter-rotatable about their respective cylindrical axes and which define therebetween a nip between which material passes is disclosed. There is a corresponding pair of spaced apart doctor blades, each in close proximity to a corresponding one of the rolls so that material may be conveyed between the roll nip and the space between the doctor blades. In one form, the nip passes material to the space between the doctor blades and that space has a downstream restriction which causes the material to compress in an accordion-like way forming a corrugated material web. In another form, the doctor blades function to deliver thermoplastic extrudate to the nip between the rolls to form elongated sheets or webs of plastic material of improved uniformity.
REFERENCES:
patent: 4422892 (1983-12-01), Plant
patent: 4717329 (1988-01-01), Packard et al.
patent: 5500175 (1996-03-01), Bradt
Materials Research Innovations Corporation
Nagumo Mark
Rickert Roger M.
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