Abstract: A rotary/linear convertor which comprises a first member may be in the form of a piston (14, 15, 16, 17, 114, 115, 116, 117) and a guide which is preferably in the form of a cylinder (12, 112) the first member being arranged for linear movement within or along the guide and a second member (23, 24, 137) which is adapted for rotational movement. The convertor further includes connecting means operatively connecting the first and second members so that the respective linear or rotational movement of one member causes the respective linear or rotational movement of the other member.

Abstract: A signature stacker providing improved structure for intercepting a stream of signatures of newspapers from a infeed conveyor of a press apparatus and having improved apparatus for controlling timed operation of the various elements of the stacker so as to provide for high speed and continuous operation of the stacker.