Abstract: This invention is directed to an assembly for adjustably mounting the optical system of a reproduction apparatus, having an optical system for projecting a light image of information to be reproduced on to a recording medium, relative to a frame of the reproduction apparatus. The adjustable mounting assembly comprises at least one stud supported by the frame and selectively moveable relative thereto. The optical system is clamped to at least one stud for movement therewith, the clamping mechanism including an elastomeric member for substantially isolating the optical system from any shock imparted to the frame.

Abstract: Document sheets are fed to a platen of a copier from two feeding apparatus, one of which is a recirculating feeder adapted to sequentially feed a plurality of document sheets of one document to the platen for copying information on one or both sides of each sheet. The sheets are circulated in a manner that results in the production of collated sets of copies. The platen also can receive one or more sheets of another document fed from a document positioner. The positioner can be used to feed a document that is too large to be accommodated by the recirculating feeder, or it can feed a document that may not be reliably handled by the recirculating feeder (such as a document made by assembling pieces of copy onto a backing sheet), or the positioner can feed documents comprising a single sheet. Also, the positioner can be used for making document masters that are then copied using the recirculating feeder.