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:
Jun. 16, 1981
Filed:
Jun. 14, 1979
Herbert Birkhofer, Brunswick, DE;
Gunther Diekhoner, Brunswick, DE;
Hans-Otto Hoffler, Brunswick, DE;
Schaeffer-Homberg GmbH, Wuppertal, DE;
Abstract
A machine for the attachment of rivets, buttons or the like on clothing pieces, with an upper tool to be moved onto the lower tool, which upper tool sits on a vertically guided tool ram with electrical drive. Two different strength magnets are coordinated to the upper tool ram, the latter being spring-biased in the reverse direction, such that the weaker electromagnet which sits in the range of a cross-sectionally-smaller step of the upper tool ram surrounds the upper tool ram in ring-like manner and the stronger electromagnet has a core which core forms a pot-shaped recess for moving a plate armature therein, the latter being arranged on the free end of the upper tool ram.