JPS6470333A - Apparatus for automatically tucking in bag mouth - Google Patents

Abstract

PURPOSE:To automate bag mouth folding work, by mounting a base plate positioned on the bag mouth closed by a semicircular guide before folding due to a second folding plate and raising the edge of a bag before a tongue part is inserted by a fourth folding mechanism to open the superposed part of the bag. CONSTITUTION:When a sleeve holder 10 advances to be brought into contact with the outer periphery of a bag A and a semicircular guide 12 continuously advances to squeeze a bag mouth into an almost semicircular shape, bag mouth is closed and the flat part C of the bag A is formed to the upper part of a can lid. Next, a second folding plate 13 advances to fold up one side of the squeezed part of the bag mouth toward the almost diameter direction of the bag mouth, a tongue like part D is formed on the other side of the bag mouth and a superposed part E is formed between the flat part C and the folded-up bag. Continuously, a third folding plate 20 advances to fold up the tongue like part D toward the almost diameter direction of the bag mouth and subsequently widens the gap H between a base plate 23 and a guide plate 14 and raises the edge of the bag A to widen the opening of the superposed part E. At the same time, the part pressed by a fourth folding plate 40 of the tongue like part enters the superposed part E to complete insertion.