Skip perforator

Details Skip perforator Skip perforator

1978-05-18

1979-09-11

Spruill, Robert L.

Cutting

Cutting motion of tool has component in direction of moving...

With means to render cutter pass ineffective

83315, 83344, 83348, 83528, B23D 2512

Patent

active

041671317

ABSTRACT:
Apparatus for producing all over pin hole perforations in the plies for multiwall bags except at the tops and bottoms in the area of interply pasting.

REFERENCES:
patent: 2345072 (1944-03-01), Rosenlea et al.
patent: 2762433 (1956-09-01), Russell
patent: 3566735 (1971-03-01), Greene
patent: 4058041 (1977-11-01), Ito

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