Abstract: A sorter for sorting a printed sheet discharged from an image forming machine, comprises: a plurality of bins arranged in a vertical direction; a conveyer provided vertically along the plurality of bins to convey the printed sheet vertically downward; an indexer having a guide surface in its upper portion, being vertically movable along a sheet travel route of the conveyer, for peeling the printed sheet off the conveyer with the guide surface and sending the printed sheet in either one of the plurality of bins; a controller connecting to driving the conveyer and the indexer; and a operating panel connecting to the controller, wherein the operating panel receives a printing sheet information of the sheet to be printed and fed the information to the controller, and the controller determines a start position of a working bin out of the plurality of bins in response to the information from the control panel.

Abstract: A layer of ink containing a light absorbing heat generating substance is provided on the rear surface of a heat-sensitive plastic film of a thermal stencil sheet when the heat-sensitive plastic film is perforated by a laser beam. When a rotary stencil printer is used, a stencil sheet is mounted around a printing drum of the rotary stencil printer in a condition adhesively held by an ink layer, then a laser beam is irradiated to a portion of the stencil sheet to be perforated, and then the printing process is carried out with the stencil sheet as it has been mounted around the printing drum for the perforation.

Abstract: A mimeographic printing machine includes a flexible rotary cylindrical printing drum, a lower pusher roller, an inside pusher roller, inside pusher roller controller, and printing sheet conveyor. A stencil paper is wound on the outer surface of the flexible rotary cylindrical printing drum. The lower pusher roller is provided in parallel with the flexible rotary cylindrical printing drum with a predetermined space between the lower pusher roller and the flexible rotary cylindrical printing drum and inside the flexible rotary cylindrical printing drum. The inside pusher roller controller moves the inside pusher roller between a deformation position to push the flexible tubular wall radially outwardly thereby to deform the flexible tubular wall towards the lower pusher roller in the case of printing, and a steady position to release the flexible tubular wall from the deformation in the case of non-printing. The printing sheet conveyor moves the printing sheet from the sheet supplying section through the space.