Patent · US Expired

Punch

US4607557A · kind A · utility

1Cited by

8References

5Claims

0Family size

Assignee

L. Schuler GmbH · DE

Inventors

Ewald Bergmann · Rechberghausen, DE
Otto Kurz · Uhingen, DE
Hans-Martin Dommer · Göppingen, DE

Key dates

Filing date	Aug 22, 1984
Grant date	Aug 26, 1986
Priority date	—
Expiry date	Aug 22, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T83/944
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A punch which includes a notching tool and a separating which are adapted to punch at least one notch and a separating gap in each effective working stroke of the punch. A separating tool is formed by at least two independently disposed separating punches which are spaced from each other by a distance which is equal to or greater than a width of a web formed between two punched notches. Likewise, the notching tool may be in the form of two independent spaced notching punches.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.