Plastic article or earthenware shaping or treating: apparatus – Tamp rod – plunger or male shaping member
Patent
1978-02-28
1980-02-12
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Tamp rod, plunger or male shaping member
425447, 425468, B29C 114
Patent
active
041881788
ABSTRACT:
A plastic wing nut with an internal thread, a mold therefor and a method of molding such a wing nut in which the wing nut is molded so as to have only a single internal thread thereby greatly simplifying the molding process is disclosed.
REFERENCES:
patent: 2256769 (1941-09-01), Amrine
patent: 2317823 (1943-04-01), Strauss
patent: 3618170 (1971-11-01), Owens
patent: 3849053 (1974-11-01), Bruce et al.
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