Patent ID: 8105069
Filing Date: 2012-01-31
Classification: B29C

Abstract:
1. An apparatus for forming shaped bodies from a thermoplastic film, the apparatus comprising: a stationary support; a downwardly directed upper tool fixed on the support; means for feeding the film in a transport direction in steps underneath the upper tool; a lower shaft extending along pivotal about a lower axis in the support below the upper tool; a frame carried on the shaft and pivotal thereon about the lower axis of the shaft; an upwardly directed lower tool shiftable on the frame toward and away from the lower axis; a link plate pivotal about the lower axis and formed with a pair of arms extending radially from the shaft angularly offset from each other; a link extending between one of the arms and the lower tool; a crank drive element; a connecting rod extending between the other of the arms and the crank drive element; a stationary cam the frame, fixed relative to the support, and having a nonstraight cam formation; a cam follower on the tool engaging the cam formation; and drive means for rotating the crank drive element and thereby simultaneously pivoting the shaft about the lower axis, shifting the lower tool along the frame, and moving the follower along the cam formation and for shifting the lower tool between an upper position pinching the film against the upper tool and a lower unloading position offset in the direction from the upper position.