Method of and apparatus for producing can bodies welded along th

Details Method of and apparatus for producing can bodies welded along th Method of and apparatus for producing can bodies welded along th

1981-02-12

1983-11-08

Shaw, C. C.

Electric heating

Metal heating

Of cylinders

219108, 2191171, B23K 1106

Patent

active

044144555

ABSTRACT:
In conventional methods for welding can bodies along their longitudinal seams, high frequency substantially rectangular a.c. currents are used for the welding current to avoid the problem of arcing found in d.c. welders. However, the high frequency a.c. current causes an undesirable degree of heating which produces eddy currents and necessitates cooling equipment. To overcome this problem, a method of producing can bodies welded along their longitudinal seam is provided in which the length of a half wave of the substantially rectangular welding current is matched in length and concurrent with the amount of time required for a can body to pass between the welding electrodes.

REFERENCES:
patent: 3542992 (1970-11-01), Sennello
patent: 3553567 (1971-01-01), Pesce et al.
patent: 3632949 (1972-01-01), Thorne

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