Method and apparatus for the production of frusto-pyramidal can

Details Method and apparatus for the production of frusto-pyramidal can Method and apparatus for the production of frusto-pyramidal can

1989-10-27

1991-03-19

Ramsey, Kenneth J.

Metal fusion bonding

Process

With shaping

413 1, B23K 3102

Patent

active

050003704

ABSTRACT:
Circular cylindrical bodies (2) are formed from rectangular sheet-metal blanks by rounding and longitudinal seam welding. These are widened oval-conically over their whole length in a first expanding operation and then relaxed again. Then the bodies (2) are widened in a second expanding operation so that they acquire their polygon-like, particularly rectangle-like, cross-sectional shape over their whole length. As a result, the bodies are stressed at their marginal regions at the ends in such a manner that these marginal regions do not become undulatory and can therefore be satisfactorily joined with a can cover or bottom.

REFERENCES:
patent: 3350914 (1967-11-01), Ohlsson
patent: 3690141 (1972-09-01), Brownbill
patent: 4271777 (1981-06-01), Collins et al.

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