Drawing apparatus and drawing method

Details Drawing apparatus and drawing method Drawing apparatus and drawing method

2008-12-30

2010-10-05

Tucker, Philip C (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

Press forming means, press reshaping means, or vulcanizing...

Roll and coacting stationary shaping surface

C425SDIG058, C425S402000, C425S362000, C264S312000, C072S082000, C072S083000, C072S067000, C072S112000, C072S115000

Reexamination Certificate

active

07806679

ABSTRACT:
A drawing apparatus is capable of releasing a material, the inner surface of which has been formed into a concavo-convex shape with drawing, from a mold with excellent release performance, even in the case where the concavo-convex part formed in the inner surface of the product is of a shape causing it to get caught in the direction of pulling out of the product against the mold. The mold is formed in a split structure having a concavo-convex surface shape and is contractible in diameter after the forming of the material.

REFERENCES:
patent: 4533312 (1985-08-01), Von Holdt
patent: 6254256 (2001-07-01), Wolfe
patent: 6526794 (2003-03-01), Langer et al.

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