Accumulator head having a piston with a self-wiping face

Details Accumulator head having a piston with a self-wiping face Accumulator head having a piston with a self-wiping face

B - Operations, Transporting

29

C

18/514, 18/727

B29C 47/20 (2006.01) B29C 47/06 (2006.01)

Patent

CA 1160411

ACCUMULATOR HEAD HAVING A PISTON WITH A SELF-WIPING FACE Abstract of the Disclosure An accumulator head is decribed as having an annular accumulation chamber, an annular ring-piston movable axially through the chamber, an inlet through which plasticized resinous material is forced into the chamber between opposing ends there- of; and a special feature built into the ring-piston which causes material, flowing into the chamber, to wipe the face or tip of the piston and keep it clean and free of any material. A discharge passageway leads from the accumulation chamber to a discharge orifice adjacent which a parison is formed by resinous material from the chamber. Another inlet is provided in the discharge passageways as a means of providing a final, outer layer or laminate of material to that flowing out the discharge passageway from the chamber.

381173

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