Patent GB-224291-A (GB)
Title: Improvements in apparatus for the photographic reproduction of the successive leavesof a book, or of sheets assembled or arranged in book form
IPC: G03B27/46
Filed: 1923-08-08
Abstract: 224,291. Breslauer, M. Aug. 8, 1923. Copying.-Apparatus for successive reproduction of the leaves of a book or of sheets assembled in book form comprises a film camera apparatus and means for successively raising the leaves or sheets into position for photographing, and for turning them after the exposure, the film feed, the shutter and the leaf raising and turning devices being successively operated from a rotating shaft. A frame 1, Fig. 1, carries the camera 2 at one end and the book 4 and leaf-turning devices at the other end, the operating shaft 25 being rotated from the motor 29. The book 4 is supported in a horizontal position on a vertically-adjustable table 3 on the frame 1, and the leaves are raised on to a suction plate or frame 12 for exposure by a reciprocating suction head 45 extending across the leaf. After exposure a resilient leaf turning bar 62 rotates and moves the exposed leaf into horizontal position on the opened cover of the book which is supported on a second horizontally-movable table 19. The frame 12 is divided info compartments which have separate connection to the suction pipe so that one or more compartments may be shut off according to the size of the book. To keep the turning axis of the leaves of the book substantially stationary in the vertical plane of the frame 12 ,against which the leaves are in turn held for exposure, the table 3 is raised after each exposure to the extent of the thickness of a leaf by a cam 26 on the shaft 25 and a crank rod 24 carrying a pawl 23 which rotates a ratchet wheel 70 on the shaft 15. This shaft carries toothed wheels 16 engaging racks 14 on the frame 3. Concurrently with this raising of the book the table 19 is shifted horizontally. The table 19 has sidecheeks 20 and sleeves 16 moving on rods 17 extending from the frame 1. The cheeks 20 have edges at 45‹ to the horizontal formed with T- heads, Fig. 8, engaging grooves 22 formed on corresponding cheeks 21 fixed to the table 3. The transverse suction head 45 is adjustably mounted at the end of a sleeve 48, Fig. 5, on one arm of a counterweighted lever 43 turning on a spindle 72. The arms of the lever are mounted on a block 42 on the spindle, and the spindle 72 carries a pinion 41 in engagement with a rack 40 sliding on the frame 1. When the arm 43 is horizont'al a valve 64 in the suction pipe is operated by a cam 73 on the shaft 25 to connect the head 45 with the suction pump 63 also driven from the motor 29. A blower head 47 also directs a stream of air on to the edges of the leaves freeing the leaves from the leaf sucked up. The lever 43 is rocked into verticai position by the weight 46 and towards the end of this movement the valve 64 puts the suction pump into communication with the suction frame 12 against which the leaf is held. The suction head is released from the leaf by a sliding movement of the carrying sleeve 48, Fig. 5, on the lever 43 under the action of a spring 50 when the holding catch 51 is released by a projection 52 on the frame. The arm 43 is rotated back to horizontal position by the rack 40 and pinion 41, the rack being moved to the right (see Fig. 1) by a slotted arm of the crank lever 39 which is rocked on its pivot 38 by a cam 30 on the shaft 25. At the end of this movement a second projection 52<a>, Fig. 5, on the frame 1 engages the bar 49 on the sleeve 48 and it is then held by the latch 51. Also during this return movement a one-way feed gear between the pinion 41 and a chain wheel 55 drives the chain shaft 59 and rotates the leafturning arm 60 through 180‹. The film spool 10 is rotated by a friction roller 11 through gearing 36 actuated by a reciprocating pawl controlled bv a crank 31 on the main shaft 25. The connecting rod 33 is adjustable in a slot 32 in the crank for adjusting the feed. The camera shutter is operated by a cord 67 and pivoted lever 66 controlled by a cam 65 on the shaft 25 which may have an adjustable surface for varying the exposure.