Apparatus and method of welding nails to wires

Details Apparatus and method of welding nails to wires Apparatus and method of welding nails to wires

1984-10-16

1985-07-30

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 56, 219114, 219115, B23K 1110

Patent

active

045323992

ABSTRACT:
An improvement in a method of welding the shanks of successive nails to a pair of wires to form a series of wire connected nails suitable for packaging and use in a power driven fastener driving device which includes the steps of connecting a pair of electrodes with a source of electrical current characterized by repetitive cycles and effecting repetitive nail-to-wire cycles each of which includes an initial movement of (1) the shank of an unattached nail (2) a pair of wires extending transversely thereacross and (3) the electrodes from a position of initial contact into a welding station wherein pressurized contact between the electrodes, the nail shank and the wires is maintained and a final movement out of the welding station to a final release position of the electrodes with respect to the welded together nail shank and wires. The improvement comprises the step of synchronizing the electrical current cycles connected with the electrodes and the nail-to-wire cycles so that a similar portion of each current cycle will flow through each unattached nail and the pair of wires between the electrodes during the time period of each nail-to-wire cycle when the latter are in the welding station. Apparatus is disclosed for carrying out the method.

REFERENCES:
patent: 2264175 (1941-11-01), Dawson
patent: 2673275 (1954-03-01), Kreft
patent: 3083369 (1963-04-01), Peterson
patent: 3708646 (1973-01-01), Ritter
patent: 3798405 (1974-03-01), Boothe
patent: 4144440 (1979-03-01), Schalch
patent: 4409461 (1983-10-01), Mizutani

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