Patent ID: 6088994
Filing Date: 2000-07-18
Classification: B29C,B29K,B65B

Abstract:
A packaging machine comprising:film transporting means for moving an elongated film along a path;a former for bending the film into a tubular form;a longitudinal sealer for sealing together side edges of the tubularly formed film longitudinally;a detector for detecting an eye mark on the film at a detection position;a transverse sealer operating cyclically and having a pair of seal jaws for clamping the film from opposite sides of said path at a clamping position and cutting the film at a cut-position on the film;memory means storing data including a desired length for bags to be made, distance on the film between the eye mark and the cut-position, and film length along said path between said detection position and said clamping position; andcontrol means for calculating a travel distance from said data and controlling timing of motion of said jaws such that the film is clamped by said seal jaws exactly when the film has traveled said calculated travel distance after said detector detects an eye mark on the film to thereby form a bag with said desired length.