Patent ID: 8449280

Claim:
A machine for blow-molding containers from a parison, the machine comprising: a turntable continuously rotating about an axis of rotation in an endless circle without stopping; a flow head forming and providing the parison and being fixedly positioned at a first station of the machine proximate the turntable; a plurality of molds carried by the turntable to position each of the molds adjacent the flow head in turn, each mold including mold portions which are movable between an open configuration to receive the parison from the flow head and a closed configuration to mold the parison; and a dwell cam mechanism located on the turntable and including (a) a dwell cam track having undulations that divide the dwell cam track into a first segment, a second segment, and a third segment and (b) a dwell cam follower engaging the undulations as the turntable rotates, the dwell cam follower engaging the first segment configured to cause initial acceleration of the mold, the second segment configured to stop the mold, and the third segment configured to cause final acceleration of the mold, the dwell cam mechanism initially accelerating each mold in turn from an initial location relative to the turntable as the mold approaches the first station to position the mold adjacent the flow head, stopping the mold adjacent the flow head while the mold receives the parison and the turntable continues to rotate, then finally accelerating the mold relative to the turntable as the mold leaves the first station to position the mold at its initial location relative to the turntable.