Patent ID: 6110089
Filing Date: 2000-08-29
Classification: B29C,B65B

Abstract:
A bag making and packaging machine for sequentially forming packaged bags from an elongated film which moves longitudinally along a specified film path, said bag making and packaging machine comprising:a pair of transverse sealing members on opposite sides of said film path for transversely sealing said film;a pair of support members each supporting a corresponding one of said transverse sealing members;a force supplier for moving said support members in a mutually approaching direction perpendicular to said film path to bring said transverse sealing members towards each other to contact with said film and away to separate from each other;at least one elastic member interposed between at least one of said support members and the corresponding transverse sealing member, said elastic member being in a contracted condition when said transverse sealing members are in contact with said film on said film path and thereby causing said transverse sealing means to apply on said film a sealing pressure corresponding to the distance of contraction by said elastic member;target setting means for allowing a user to set a target sealing pressure; andcontrol means for determining the distance of movement by said support members in said mutually approaching direction when said film is transversely sealed and controlling to move said driving means in said mutually approaching direction by said distance of movement such that said sealing pressure becomes equal to said target sealing pressure.