Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B26
HAND CUTTING TOOLS; CUTTING; SEVERING
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B26F
PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
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1/00
Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
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B26F1/18
Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
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B26F1/20
with tools carried by a rotating drum or similar support
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