| 摘要 |
A slitter mechanism for use in a double fold bottomer apparatus employed in making bags from starting flush cut tubes is described which gives precise, high speed side marginal tube slitting in order to permit subsequent downstream gluing and folding operations. In preferred forms, the slitter mechanism includes a bag-end separating assembly having a vacuum manifold and a cooperating adjacent deflector bar serving to separate end portions of the sidewalls of a moving tube. A sequentially rotatable blade is also provided which first enters the open end of the moving tube between separated wall portions, overtakes and slits the leading side margin of the tube, and then stops with a trailing slitting edge situated within the tube open end; subsequent bag movement causes the trailing tube side margin to engage and be slit by the stationary blade edge. |
