Plastic article or earthenware shaping or treating: apparatus – Means providing a shaping orifice
Patent
1990-11-29
1991-12-17
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Means providing a shaping orifice
425467, 425DIG58, B29C 4700
Patent
active
050731025
ABSTRACT:
The plate for extrusion, having discharge holes equipped with fitted inserts, in which the discharge holes each possess a seating having a circular base surface and an outlet opening at the surface of the plate having a substantially elliptical outline, the major axis of the ellipse being equal to the diameter of the base surface, an insert being fitted in the seating which possesses a base surface, facing towards the inside of the plate, having a substantially elliptical outline which can be inscribed, with slight clearance, inside the opening of the seating, and having an opposite surface, facing towards the outside of the plate, having a circular outline with its diameter equal to the minor axis of the base.
REFERENCES:
patent: 2058032 (1936-10-01), Murphy
patent: 3397427 (1968-08-01), Burke, Jr. et al.
patent: 3947172 (1976-03-01), Myers
patent: 4354989 (1982-10-01), Beach
patent: 4396366 (1983-08-01), Kessler et al.
patent: 4445838 (1984-05-01), Groff
patent: 4480977 (1984-11-01), Nazem
patent: 4563140 (1986-01-01), Turecek
Bushey C. Scott
Dubno Herbert
Pomini Farrel S.p.A.
Woo Jay H.
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