Metal tools and implements – making – Machines – Die-forming
Patent
1987-12-01
1990-10-30
Parker, Roscoe V.
Metal tools and implements, making
Machines
Die-forming
76 892, 761078, 72325, 72412, B21K 520
Patent
active
049660543
ABSTRACT:
This disclosure relates to a method and an apparatus for producing a punch (3) having sharp cutting edges (41) for label cutting apparatus or the like. In order that the cutting edges (41) may have a constant height and that they may be made semiautomatically, a punch body (3) is provided with a raised edge (4) in a first process step, by etching for example, and this edge is then made into a sharp cutting edge (21) in a second process step by hammering. An apparatus suitable for this purpose contains a table (2) for the punch body (3), over which tool (32, 70) in the form of a hammering and/or cutting tool and having an roof-shaped notch (34) is disposed, which can be reciprocated automatically in the direction of the table (2) between two dead centers in order to give the raised edge (4) an external contor corresponding to the roof-shaped contour of the notch (34).
REFERENCES:
patent: 1113900 (1914-10-01), Jackson
patent: 2467302 (1949-04-01), Forster et al.
patent: 3905283 (1975-09-01), Baker
patent: 4528836 (1985-07-01), Durand-Texte
patent: 4579022 (1989-04-01), Kasai
Kocher & Beck OHG Gravieranstalt und Rotationsstanzenbau
Parker Roscoe V.
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