Patent ID: 6149565
Filing Date: 2000-11-21
Classification: B31B,Y10S

Abstract:
A process for producing stacks of bags which comprises at least the steps of:(a) feeding a web having an upper foil layer and a lower foil layer along a bag-producing path in a feed direction and forming said web with at least one marking distinguishing a lateral position of said web on said path;(b) at a punching station forming said web with a pair of openings at least on opposite sides of a longitudinal axis of the web for each of a succession of pairs of bags to be produced;(c) separating said web into a succession of bag segments each corresponding to a pair of bags;(d) stacking said bag segments with pins at a stacker extending through said openings to form a segment stack;(e) longitudinally cutting through said stack to separate pads of said bags from one another; and(f) detecting said marking and automatically in response to detection of said marking laterally positioning said punching station transversely to said direction for laterally positioning said punching station independently of a lateral position of said web.