PLASTIC FILM PUNCHING APPARATUS

摘要

A plastic film punching apparatus is improved to prevent a waste 15 from being caught in a cylindrical punch blade 2. The apparatus includes a punch blade 2 comprising a saw¨toothed edge which includes mountain portions and valley portions formed alternately with each other. A protrusion 5 is disposed internally of the punch blade 2 to protrude beyond the position of height H1 of the bottoms 7 of valley portions and toward the position of height H2 of the tops 6 of mountain portions. An annular clearance 8 is formed between the punch blade 2 and the protrusion 5.