Self-adjusting closing machine for parallelepipedal boxes of varying format

摘要

A detecting member for the height of the box with open side flaps is mounted in a vertically variable position on the closing assembly for the top flaps and is connected mechanically to the drive device which draws together the box conveyance units. In this manner drawing together of the conveyance units until they engage the sides of the box causes a corresponding movement of the detecting member which arranges itself in a position dependent upon the width of the box. Fall of the closing assembly starts simultaneously from a raised neutral position and continues until engagement of the detecting member so arranged with the top of an open side flap of the box. Braking means then stop the fall of the closing assembly. Appropriate sensitive means start operation of the closing assembly for the rear flap on the basis of the box length.