Patent ID: 6212861
Filing Date: 2001-04-10
Classification: B29C,B65B

Abstract:
A vertical forming, filling and sealing machine comprising:a top sealing mechanism for heat sealing a sheet film folded so that both side ends are coincident with each other, said top sealing mechanism heat sealing said both side ends along the longitudinal direction of said film to form said film into a tubular shape;a folding mechanism for forming two ridge portions in said film by folding the width direction center part of said film along the longitudinal direction of said film;a bottom sealing mechanism for heat sealing at least the two ridge portions along the longitudinal direction of said film, said two ridge portions being formed in said film by said folding mechanism;a pair of squeezing rollers provided opposite to each other and reciprocally movable with the film heat sealed by said top sealing mechanism and bottom sealing mechanism interposed therebetween, said squeezing rollers pressure holding the film from both sides and rotating thereby carrying the film downwardly;an injection pipe for injecting filling material inside said film at a place above said squeezing rollers;a end sealing apparatus disposed below said injection pipe having two vertically spaced sealing mechanisms and two vertically spaced cooling mechanisms disposed below said sealing mechanisms, means for independently moving each of said sealing mechanisms and said cooling mechanisms in a direction perpendicular to said vertical direction for horizontally heat sealing said film and cooling the heat sealed portion; means for independently moving each of said sealing mechanisms and said cooling mechanisms vertically wherein,as one of the sealing mechanisms of said end sealing apparatus is moving downward together with said film and heat sealing said film, the other one having moved downward with film while heat sealing said film in the previous operation is carried upward for the next heat sealing operation; andas one of the cooling mechanisms of said end sealing apparatus is moving downward together with said film and cooling the portion heat sealed by the other heat sealing mechanism in the previous operation, the other one of said cooling mechanisms moves upward for the next cooling of the portion heat sealed by the other sealing mechanism.