membrane throughout an extended length along the path of travel of the container is considered significant so as to insure a proper activation of the adhesive and a sealing of the membrane during the contemplated high speed operation for example while the heat tacking of the membrane to the container at the punching station can be effected in as little as 0 06 second the actual heat sealing of the membrane may require as much as 1 2 second or more thus by effecting this heat sealing as the container continues to move along a path a continuous high speed operation can be maintained after the individual container has been subjected to the pressure and heat of the hot chuck for a sufficient length of time this normally entailing rotation of the container through an arc of approximately 180 u00b0 by the starwheel conveyor 20 the container is lowered away from the associated chuck 88 so as to begin a cooling cycle about a selected portion of the first starwheel 20 and a substantially major portion of the second starwheel conveyor 22 incidentally while the vacuum within each of the base chambers 96 may be maintained throughout the complete rotation of the base 74 as a matter of manufacturing convenience this vacuum while sufficient so as to properly maintain the membrane will not interfere with the sliding of the membrane sealed containers 10 to the second starwheel conveying unit 22 with reference to fig1 and 4 in particular the second starwheel conveyor.