Heat seal device of filling and packaging machine

A heat seal device of a filling and packaging machine, wherein a continuously fed film is vertically sealed by a vertical seal mechanism so as to form said film in a cylindrical shape and is sealed laterally by lateral seal mechanisms so as to form a bottom portion which forms packaging bags, contents are filled in said film formed in the bottomed cylindrical shape and, while said film is fed, a portion of said film which forms bag opening portion side is sealed laterally by said lateral seal mechanisms for continuously packaging as pouches, the improvement being characterized in that said vertical seal mechanism comprises a pair of rotating shafts, incorporating heaters mounted rotatably, and two pairs of vertical seal rolls which are mounted in pairs on said rotating shafts with a given distance in the axial direction of said rotating shafts and have seal portions protruded in a flange shape around outer peripheral portions respectively, said heaters incorporated in said rotating shafts are disposed movably along the axial direction of the rotating shafts for adjusting movably the position of the heaters relative to the position of two pairs of said vertical seal rolls so that the surface temperatures of said seal portions of said two pairs of said vertical seal rolls are made generally equal to each other, wherein temperature detecting means is mounted on said vertical seal rolls.