Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common... – Extrusion shaping means
Patent
1990-05-29
1991-05-21
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Means feeding fluent stock from plural sources to common...
Extrusion shaping means
264173, 4253823, B29C 4724
Patent
active
050171178
ABSTRACT:
Nozzles for extruding annular shaped plastic products including a stationary column, a rotary head rotatably carried by the stationary column by at least one roller bearing cooperating along at least one cylindrical interface, with the stationary member including at least two supply conduits for the plastic material and the rotary head including a corresponding number of continuation flow passages so that the plastic material can be transferred from the stationary column to the rotary head at the cylindrical interface. The cylindrical interface includes a portion having a predetermined diameter so that one of the supply conduits and its corresponding continuation passage is located at a predetermined intermediate location along that portion of the cylindrical interface, and that continuation passage includes the at least one roller bearing, and the nozzle includes packing glands located on opposite sides of the roller bearing along that cylindrical interface, so as to prevent plastic material from leaking from the nozzle.
REFERENCES:
patent: 3540078 (1970-11-01), Schultz
patent: 3649143 (1972-03-01), Papesh et al.
patent: 3809515 (1974-05-01), Farrell
patent: 4167383 (1979-09-01), Murakami et al.
patent: 4203715 (1980-05-01), Raley et al.
patent: 4435241 (1984-03-01), Corbett
patent: 4541793 (1985-09-01), Lindqvist
Mechanical Design and Systems Handbook, 2nd Ed. Harold A. Rothbart, Editor in chief, McGraw-Hill, Inc.: U.S.A., 1985.
Matney, Jr. William J.
Woo Jay H.
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