Patent GB-1150461-A (GB)
Title: Microfiche Projection Machine
IPC: G03G15/04
Filed: 1966-06-27
Abstract: 1,150,461. Xerographic apparatus for reproducing microfiche. RANK XEROX Ltd. June 27, 1966 [June 30, 1965], No.28662/66. Headings G2A and G2H. An apparatus for reproducing micro-images on microfiche has an optical projection apparatus and a microfiche clamping device as described in Specification 1,150,462. Means are provided for positioning the clamping device in a plurality of predetermined positions and for producing relative movement between the optical axis of the projection system and clamping device for producing indexing and scanning of the micro-images. As applied to a xerographic reproducing apparatus as described in Specification 995,413 the microfiche is carried in a holder 48, Fig. 9, mounted in a carriage 100 which is indexed in longitudinal and transverse directions to locate a particular micro-image in the optical axis and given a reciprocable scanning movement to reproduce individual micro-images. The carriage 100 has sides 101, 102 and ends 103, 104 within which the holder 48 is slidable by grooves 105 Fig. 10. A ball bearing slide mechanism 106, 107 permits sliding movement of the carriage with respect to outer rises 107 of the mechanism, while a similar mechanism 110, 112 permits sliding movement at right angles thereto, thereby permitting indexing along a row e.g. A or B, Fig. 9, and from row to row A to B. Similar indexing mechanisms 115 and (116 Fig. 12 not shown) are controlled by solenoids (SOL-7) and SOL-6(Fig. 6). The transverse indexing mechanism (116 Fig. 12 not shown) has an indexing (118) and an escapement mechanism (119) and a linear actuator (120) having a drive rod 121 and stator (LM-1). The escapement mechanism (119) provides indexing between rows of micro-images in a manner described with reference to Figs. 13 to 20 (not shown). A platform 117, Figs. 9 and 10 is reciprocated continuously along the length of a micro-image to produce the scanning movement by drive rod 185, Fig. 9, engaged by a roller 184 driven by a motor M10. The roller 184 engages the rod 185 intermittently to drive the platform in one direction against a spring 196. A photo-cell P-2, Fig. 10, co-operates with a light source 260 to detect the last frame of a microfiche by detecting the clear film area of the next frame to cause the carriage 180 to return to a home position. The apparatus is controlled by a circuit described with reference to Figs. 30, 31, 32 (not shown) having a control panel Fig.3 (not shown) having an "on" button (SW-1), print control switch (SW-7) which initiates scanning of the first microimage, print stop control switch (SW-9) to switch off the projector lamp and initiate shut down of the apparatus. A switch (SW-2) is an emergency control switch for immediately stopping the apparatus. A copy selector (SW-6B) in a rotary selector switch for preselecting the number of runs to be made for the entire microfiche or the number of multiple copies when the position "M" is utilized. Reload lamps LMP-6, LMP-7 indicate a shortage of paper. Switches (ST) and SL) permit random selection of a particular microimage i.e. row D fourth column as set. Switches (ET) and (EL) determine the particular microimage which terminates a particular run i.e. row F fourth column as set. The apparatus is also controlled by a programmer Fig. 27 (not shown) of the kind described in Specification 995, 413 which controls paper feed and paper pick-off mechanisms.