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. 04, 1996
Filed:
Nov. 05, 1993
Oskar Eigenmann, Arbon, CH;
Helmut Messner, Arbon, CH;
Bruderer AG, Frasnacht, CH;
Abstract
When starting up the punch press its eccentric shaft must accelerate through a start-up angle from the resting state up to the operating speed of rotation due to the forces of inertia of the moving structures of the punch press. When stopping the punch press the eccentric shaft is rotated in the direction of normal operation into a position between the upper dead center and the lower dead center position, in which latter position no contacting between the upper tool and the metal strip to be worked upon takes place. From this position the eccentric shaft is rotated backwards by the start-up angle into a start-up angle position. In the start-up angle position again no contact between the upper tool and the strip takes place. Accordingly, an enlarged start-up angle which has been increased backwards over the upper dead center position is available for the start-up of the punch press, such that the first punching is executed at the same dynamic conditions of the punch press as the next subsequent punching operations, such that when starting the punch press up precise products are produced already by the first stroke.