Patent ID: 7341085
Filing Date: 2008-03-11
Classification: B31B,B65B,Y10S,Y10T

Abstract:
1. Station for applying segments of openable/reclosable strip on plastic film web destined to form bags, said station comprising sealing means for sealing of said strip segments at intervals on the film and punching means of predefined zones of film for access to zones of said segments through the film, the punching means and the sealing means being positioned in the station along the film path to act in sequence in the same zone for punching the film and sealing the segments in the predefined points of the film keeping the film stationary between the film punching operation and the corresponding operation of sealing a segment on the film, the sealing means including two facing sealing surfaces reciprocally mobile towards each other with interposition of film and of the segment to be sealed to the film and the punching means includes on one face of the film at least one mobile punch movable towards the surface of the film and on the opposite face of the film opposite contrast means, the contrast means being mobile between an operative position in which the contrast means is placed between one of the sealing surfaces and the corresponding face of the film to constitute a striker plate to the punch and a non-operative position outside the interposition to permit the sealing surfaces to be brought close and to permit the sealing of the segment on the film between them.