Patent · US Expired

Method of and apparatus for producing can bodies welded along the longitudinal seam

US4414455A · kind A · utility

9Cited by

3References

15Claims

0Family size

Assignee

L. Schuler GmbH · DE

Inventors

Franz Schneider · Göppingen, DE
Walter Panknin · Göppingen, DE
Zelimir Belamaric · Pully, CH
Fred Schalch · Le Landeron, CH

Key dates

Filing date	Feb 12, 1981
Grant date	Nov 8, 1983
Priority date	—
Expiry date	Feb 12, 2001

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K2101/125
WIPO fieldMachine tools
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.