Mechanism for intermittently advancing and positioning articles

Claim 1

MECHANISM FOR INTERMITTENTLY ADVANCING AND ACCURATELY POSITIONING ARTICLES IN A WORK STATION COMPRISING SUPPORT MEANS, A LOWER ENDLESS CONVEYOR MOUNTED ON SAID SUPPORT MEANS AND HAVING UNIFORMLY SPACED SEATS THEREON FOR SUPPORTING ARTICLES FOR MOVEMENT ALONG A PREDETERMINED PATH, AN UPPER ENDLESS CONVEYOR, A PAIR OF ROTARY MEMBERS FOR SUPPORTING SAID UPPER CONVEYOR FOR MOVEMENT THEREAROUND AND ABOVE AND IN SUBSTANTIALLY PARALLEL RELATION TO SAID LOWER CONVEYOR, MEANS ON SAID SUPPORT MEANS FOR SUPPORTING SAID ROTARY MEMBERS FOR ROTATION ABOUT THEIR AXES AND FOR SUBSTANTIALLY VERTICAL MOVEMENT TO GUIDE SAID UPPER COVEYOR FOR DOWNWARD MOVEMENT INTO ENGAGEMENT WITH THE ARTICLES TO HOLD THE ARTICLES ONTO THE LOWER COVEYOR FOR MOVEMENT THEREWITH TO THE WORK STATION, SAID CONVEYORS HAVING ALIGNED RECESSES IN SPACED RELATION TO ONE ANOTHER CORRESPONDING TO THE SPACING OF SAID SEATS, A CARRIAGE MOUNTED ON SAID SUPPORT MEANS FOR MOVEMENT PARALLEL TO SAID PATH, A CONNECTOR ELEMENT MOUNTED ON SAID CARRIAGE FOR MOVEMENT THEREWITH AND FOR MOVEMENT RELATIVE THERETO INTO THE RECESSES OF SAID CONVEYORS FOR CONNECTING SAID CONVEYORS TOGETHER FOR ADVANCING MOVEMENT, MEANS ON SAID CARRIAGE FOR MOVING SAID CONNECTOR ELEMENT INTO AND OUT OF ENGAGEMENT WITH SAID CONVEYORS, AND MEANS FOR RECIPROCATING SAID CARRIAGE.