Patent · US Expired

Process for underlaying a flat-bed steel rule die

US4326434A · kind A · utility

7Cited by

4References

7Claims

0Family size

Assignee

BASF SE

Inventors

Heinz Mohr · Speyer, DE
Walter Hoffmann · Bischofswerda, DE
Rudolf Vyvial · Ludwigshafen, DE

Key dates

Filing date	Mar 24, 1980
Grant date	Apr 27, 1982
Priority date	—
Expiry date	Mar 24, 2000

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB26F2001/4463
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A process for underlaying flat-bed steel rule dies prior to producing sheet-like geometrical cut blanks, preferably from multi-blank sheets, in which varying tolerances, in the punching and cutting direction, of the steel rule cutters held in a rigid plate are compensated by a sheet, corresponding to the area of the sheet being cut, placed on the back of the steel rule cutter plate and consisting of a flowable hardenable plastic, the upper and lower platen being moved together so as to close the die and the sheet of plastic, bearing the relief formed thereon, then being solidified by an after-treatment.

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