Metal working – Method of mechanical manufacture – Of a slide fastener
Patent
1977-11-14
1979-01-23
Dipalma, Victor A.
Metal working
Method of mechanical manufacture
Of a slide fastener
29766, 29707, 29809, B29D 500
Patent
active
041352858
ABSTRACT:
A slide fastener slider is assembled from a stock of slider bodies, pull tabs and springs with apparatus which loads a body on an anvil at a loading station, moves the anvil to an assembly station and at the assembly station positions a pull tab to receive the lugs on the body therein, inserts a spring over the pull tab trunnion and between the lugs, the tip ends of the lugs thereafter being clenched to fixedly secure the spring to the body. The assembled slider is then ejected from the anvil to a collection point. In a further embodiment, the slider body instead of having lugs between which the spring is received and the tip ends of which are clenched to hold the spring, has lugs with recesses at the outer side surfaces thereof. The wing-like sides of the spring are inserted over the tip ends of such lugs with a spreading action until the spring sides snap into the recesses to secure the spring to the body.
REFERENCES:
patent: 2354690 (1944-08-01), Lawson
patent: 2693217 (1954-11-01), Lange
patent: 2825126 (1958-03-01), Legat et al.
patent: 3138852 (1964-06-01), Mazura
patent: 3234635 (1966-02-01), Jakob
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