Patent ID: 6334246
Filing Date: 2002-01-01
Classification: A47J,B21D,B21K,B23P,Y10T

Abstract:
A method for fixing an additional bottom to an external surface of a bottom of a container, comprising the steps of:providing said external surface of said bottom of said container as a flat planar portion and an upwardly extending wall portion which extends upwardly from said flat planar portion; providing a circumferential seat in said upwardly extending wall portion of said external surface of said bottom such that said circumferential seat extends circumferentially about said upwardly extending wall distally from said flat planar portion; providing said additional bottom as a flat plate and a raised rim extending upwardly from said flat plate, and further as an end tooth which is bent with respect to said raised rim inwardly with respect to said additional bottom and which is flanged distally from said flat plate; coining said additional bottom and container mutually together in a die having a male part and a female part which are mutually relatively moveable with respect to one another by arranging said additional bottom in said female part and press said bottom of said container in said additional bottom until said end tooth of said additional bottom enters into said circumferential seatin said upwardly extending wall portion of said external surface of said bottom of said container so as to securely attach said additional bottom to said external surface of said bottom of said container.