Means for perforating paperboard
United States Patent 3205750
US Patent References:
/0160657.html
- - 0160657

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Inventors:
Strange, William M.
Publication Date:
09/14/1965
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Assignee:
JOHN STRANGE CARTON COMPANY
Primary Class:
83/660
Other Classes:
493/63, 83/695, 30/355
International Classes:
B26F1/18; B26F1/00
US Patent References:
2636267Knife blade cutting edge
2769496Rotary cutting die for perforating signatures
2956465Cutting rule and perforated line
3052146Slot perforating cutters