EP 0085057 B1 19850918 - A PUNCHING APPARATUS, PARTICULARLY FOR PUNCHING LABELS AND SIMILAR PRINTED MATTER ITEMS
Title (en)
A PUNCHING APPARATUS, PARTICULARLY FOR PUNCHING LABELS AND SIMILAR PRINTED MATTER ITEMS
Publication
Application
Priority
DK 307181 A 19810710
Abstract (en)
[origin: WO8300112A1] A punching apparatus for punching items having curved or arched edges from sheet material, particularly labels and similar printed matter items, comprises a punching die in the form of a mainly tubular member (6) manufactured from a sintered carbide alloy and having an internal cavity in which at least the wall surfaces (8) at the cutting edge are ground to smoothness, preferably to a surface roughness Ra < 0.1 mu m, and are perpendicular to the plane of the cutting edge, whereas grinding of the cutting edge 97) into a prescribed sharpness and cutting angle is performed solely on the external side of the tubular member (6). As a result thereof the intervals between necessary re-grindings of the cutting edge (7) are prolonged and an unlimited number of re-grindings may be made in practice with full retention of the accuracy of measurement of the cutting edge.
IPC 1-7
IPC 8 full level
B26F 1/46 (2006.01)
CPC (source: EP)
B26F 1/46 (2013.01); B26F 2001/4472 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB LI LU NL SE
DOCDB simple family (publication)
WO 8300112 A1 19830120; DE 3266359 D1 19851024; DK 149424 B 19860609; DK 149424 C 19861117; DK 307181 A 19830111; EP 0085057 A1 19830810; EP 0085057 B1 19850918; IT 1152279 B 19861231; IT 8222166 A0 19820630; IT 8222166 A1 19831230
DOCDB simple family (application)
DK 8200055 W 19820614; DE 3266359 T 19820614; DK 307181 A 19810710; EP 82901962 A 19820614; IT 2216682 A 19820630