Plastic article or earthenware shaping or treating: apparatus – With control means responsive to independently operated timer – For timing period mold is closed or period molding pressure...
Patent
1980-01-07
1981-03-03
Pavelko, Thomas P.
Plastic article or earthenware shaping or treating: apparatus
With control means responsive to independently operated timer
For timing period mold is closed or period molding pressure...
425393, B29C 306
Patent
active
042538122
ABSTRACT:
An apparatus for heading plastic safety pins for manifolds for use with an inflatable article such as a life vest, life raft, and the like. After the pin has been mounted in the manifold, the previously unheaded end of the pin is partially melted and compressed so as to flow laterally to form a head thereon. The die which engages the initially unheaded end of the pin is heated to a temperature which markedly exceeds the melting point of the plastic material of which the pin is made. Such die is brought forcibly into contact with and is removed from engagement with the initially unheaded end of the pin several times a second, so as to avoid the complete melting of the pin and the sticking of the plastic material to the heated die.
REFERENCES:
patent: 2510693 (1950-06-01), Green
patent: 3367809 (1968-02-01), Soloff
patent: 3431573 (1969-03-01), Miller
Judd Edward A.
Mackal Glenn H.
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