SHEET PERFORATING APPARATUS

PROBLEM TO BE SOLVED: To provide a sheet perforating apparatus capable of preventing a protruding portions of the tip of a punch from interfering with an edge of a die and having a superior durability. SOLUTION: In the sheet material perforating apparatus including a fixed die and the punch guided b...

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Bibliographische Detailangaben
1. Verfasser: TAKATSUKA HIROSHI
Format: Patent
Sprache:eng
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