SYNTHETIC RESIN FILM PERFORATING APPARATUS AND PERFORATING MECHANISM, RELEASE MECHANISM AND GUSSET FOLDING MECHANISM THEREOF

摘要

PURPOSE:To reduce the abrasion of perforating pins and to enhance the durability thereof without applying large load to said perforating pins, by holding a synthetic resin film between a rotary heat roller having a large number of the perforating pins vertically provided thereto and the press roller rotating in the state engaged with said heat roller to form perforations to said film. CONSTITUTION:A perforating mechanism A is constituted of a heat roller 1, the press roller 2 engaged therewith and a brush roller 3. A predetermined number of perforating pins 7 are vertically provided to the outer peripheral surface 6 of the roller main body 4 of the heat roller 1. The tubular synthetic resin film D fed to a perforating mechanism A is held between the rotary heat roller 1 and the press roller 2 having elasticity and, at this time, small drain holes are efficiently and continuously provided to the tubular synthetic resin film D by the perforating pins 7 arranged to the outer peripheral surface 6 of the roller main body 4 of the heat roller 1. By this method, the small drain holes are provided under extremely small load by thermal pin perforating work by the perforating pins 7 of the heat roller 1.