Apparatus for moving a carriage or the like in one direction over a predetermined distance at a substantially uniform velocity and for returning the carriage at a varying velocity

Abstract From the Canadian patent

Apparatus is disclosed which serves to move a carriage in one direction over a predetermined distance at a substantially uniform velocity and for returning the carriage at a varying velocity so that a film web which is delivered at a constant velocity is intermittently advanced relative to a welding device, which fixed to a frame. The apparatus comprises a lever, which is adapted to be pivotally oscillated by a drive and which by means of a first guide provided on said lever and extending along said lever and a slider or roller cooperating with said guide imparts a motion to said carriage, which is movable in tracks in a plane which is parallel to the plane in which the lever is pivotally …