Positioning apparatus for container forming machine

A sub-assembly for a container forming machine that changes the path of formation of a partially-formed container blank as it travels through the machine comprising:

• a. a platform means a continuous track around its perimeter;
• b. at least one support means movably engaged with said track for traveling thereon;
• c. a rotatable shaft means pivotally attached to each support means, each such shaft means supporting at least one variably operable vacuum attachment means for temporary engagement with a partially-formed container;
• d. a continuous groove means on said platform means in the vicinity of said track;
• and
• e. a movable linkage means on said support means, a first end of said linkage means being pivotally attached to said shaft means, and an opposite end of said linkage means being attached to a following means that fits into said groove means wherein said linkage means is capable of imparting rotation to said shaft means in response to the movement of said following means in said groove means as said support means travels along said track.