Patent ID: 6112505
Filing Date: 2000-09-05
Classification: B31B,B65D,Y10S

Abstract:
A method for manufacturing rigid packets having a hinged lid fashioned from relative diecut blanks, the diecut blanks each including a central longitudinal portion and two lateral portions, each lateral portion including a plurality of longitudinal lateral flaps, the method comprising:advancing the blanks along a predetermined path to a folding unit, the folding unit (i) associating each blank with a relative frame and (ii) bending the blanks and frames to fashion respective packets;wherein the blanks are successively fed between two mutually opposed and contrarotating incision rollers of a cutting and impressing unit located along the path prior to the folding unit;impinging a respective pair of adjoining flaps between the two rollers, the adjoining flaps being adapted to form an internal layer of one flank wall of the packet when bent to a right angle, the impinging forming (i) at least one bend in one flap of the pair the bend adjacent the remaining flap of the pair; and (ii) an inwardly directed projection on the remaining flap, the projection being disposed for permanent contact with the relative frame of a completed packet;wherein the two rollers are embodied with matching profiles positioned and timed to engage each lateral portion of the blank, and thereby impinge the respective pair of adjoining flaps thereof.