Abstract: A synchronous stacking device for receiving and stacking documents fed to it in a random spaced apart relationship by a delivery mechanism. Documents move from the delivery mechanism through a movable guide track having first and second positions, toward a rotating carrier for insertion into one of a plurality of equally spaced document-accepting pockets which are interspersed with document non-accepting segments. The carrier delivers the inserted documents to a stripping station when the previously inserted documents are removed and deposited on a stacking platform. Comparator means are provided for sensing the orientation of the carrier relative to a document in the delivery mechanism and moving the guide means to the second position whenever the orientation of the carrier would result in the document encountering a non-accepting segment of the carrier and would not allow the document to enter a document-accepting pocket if the guide means were to remain in the first position.

Abstract: A film threading device for use with cameras and/or projection devices is adapted to grasp the end of the outer convolution of a roll of film, tape or the like strip and guide it toward the film gate. In operation, first and second movable members, such as belts or pulleys, engage the periphery of the wound strip. The first movable member provides the film drive causing the wound film to rotate in an unwind direction. The second movable member provides a stripping action which drives the leading edge of the wound film away from a core and the film is guided by the moving member toward the nip of a thread pressure roller and a thread drive roller. The film is then guided to the film gate.