Method for forming container with profiled bottom

Details Method for forming container with profiled bottom Method for forming container with profiled bottom

1989-04-28

1991-06-18

Schmidt, Frederick R.

Metal deforming

With cutting

By shearing tool-couple

72329, 72348, 413 1, 413 69, 413 76, B21D 3102, B21D 5144

Patent

active

050240773

ABSTRACT:
A method of forming a container body having a profiled bottom in a continuous operation wherein the body is formed from a blank of material into an inverted cup, the cup is reverse drawn and a preliminary profile is imparted to the bottom of the cup, and a final profile is imparted. The apparatus includes a die cut edge movable into telescoping relationship around a redraw die to form the inverted cup and a profile punch movable into telescoping relationship within the redraw die to form the preliminary profile against a profile pad. The profile pad is selectively supported by a pair of fluidly actuated pistons whereby, upon activation of the second piston, the final profile may be formed.

REFERENCES:
patent: 3685338 (1972-08-01), Hoffman
patent: 3695084 (1972-10-01), Siemonsen et al.
patent: 3855862 (1974-12-01), Moller
patent: 3902347 (1975-09-01), Ridgway et al.
patent: 4010867 (1977-03-01), Jones
patent: 4051707 (1977-10-01), Valek et al.
patent: 4120419 (1978-10-01), Saunders
patent: 4439081 (1984-03-01), Holk et al.

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