Patent ID: 7578158

Claim:
A process for the shaping of a side surface of a metal body or container ( 10 ), obtained by progressive deformation operating steps of its side surface carried out in sequence on a machine comprising at least an intermittent moving rotating table, at least an opposite alternate translatory motion plate, a loading drum, gripping pliers of the metal body, deformation and optionally embossing and/or debossing tools and an unloading drum for said metal body, said process comprising the steps consisting of: feeding said body ( 10 ) on the machine provided with at least one intermittent rotating table and with at least one opposite translatory motion plate; gripping said body ( 10 ) along an area of the side surface from the bottom with a fixed or an axially rotating gripping means or plier; carrying out a deformation on the side surface of the body ( 10 ) with tools working from the inner and/or the outer directions of the body ( 10 ), wherein the improvement comprises: molding or partial drawing the bottom of the body ( 10 ) to form a concave area ( 14 ) having geometrical features correlated to the geometry of the gripping plier prior to said gripping step; gripping the body ( 10 ) along a limited area ( 12 ) of the side surface comprised between 10.0 and 35.0 mm from the bottom; and deforming the side surface of the body ( 10 ) along an extensive area ( 18 ) developing from an area adjacent or close to the gripped part ( 12 ).