The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 2006
Filed:
Jun. 14, 2003
Alfred Lösch, Tholey-Hasborn, DE;
Alfred Lösch, Tholey-Hasborn, DE;
Nothelfer GmbH, , DE;
Abstract
A method for controlling the material flow during the deep-drawing of sheet metal involves compressing the edges of the sheet metal () between at least one upper stopper () and at least one lower stopper () during the deep-drawing process, with a controllable elastic force (). A corresponding deep-drawing tool is also provided. A Z-shaped blocking step () is stamped into the edge () of the sheet metal when the upper and lower stoppers () are closed, the basic shape is then produced by deep-drawing, maintaining the blocking step () and completely blocking the sheet metal between the stoppers. The sheet metal () is outwardly stretched, and the blocking step () is then reduced in terms of height, facilitating the outward displacement of the sheet metal towards the outside. The deep-drawing tool has a lower stopper including an inner stopper () and an outer stopper (). The stoppers are arranged in an annular manner on the edge of the sheet metal () and can be displaced in relation to each other in the holding direction.