Metal tools and implements – making – Blank or process – Die
Patent
1993-03-01
1994-12-20
Smith, James G.
Metal tools and implements, making
Blank or process
Die
B21K 520
Patent
active
053737580
ABSTRACT:
A device for punching sheet-type material, in particular label material, includes a sleeve which encloses a supporting roller in a press fit manner. The sleeve is bent from a flat steel sheet having mutually facing edges which are joined to each other and having an external surface which is provided with punching bridges formed by etching the steel sheet. The bridges are preferably sharpened in a knife-like fashion.
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Harold Kaufmann, Machine Design, vol. 46, No. 29, 28 Nov. 1974, Cleveland US Seiten 69-71: "Two-Roll Forming for Improved Speed and Precision", Seite 71, rechte Spalte, Zeilen 30-38.
Kopp & Hornauer, Metall, vol. 34, No. 4, Apr. 1980, Berlin & Heidelberg, Seiten 320-323; "Kugelstrahl-Umformen und-Richten", Seite 322, rechte Spalte, Zeilen 61-64; Figuren 13A, 13B.
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