Patent GB-939691-A (GB)
Title: Improvements in or relating to photographic copying apparatus
IPC: G03D9/00
Filed: 1960-05-27
Abstract: 939,691. Photographic processing apparatus. KODAK Ltd. May 27, 1960 [May 28, 1959], No. 18885/60. Class 98 (1). A photographic processing and image-transfer apparatus comprises a processing fluid container and means for inserting an exposed sensitized sheet therein for development, removing it from the liquid and wrapping it round a rotatable drum which is stopped after a predetermining loading time, means for feeding one of a supply of image receiving sheets to the drum, control means being actuated by said sheet, whilst it is being fed to (a) cause pressing means to move into a position for pressing said sheet on to said drum (b) operate the drum driving means. In the apparatus shown a tray 2 (Fig. 3) is filled with developing solution which is heated by filaments 11 and temperature controlled by thermostat 8. During operation: (1) A setting lever 24, 26 (Fig. 12) is raised so that a lug thereon engages a projection 22 (Fig. 7) on a matrix clamp 18 and moves it away from the drum. The leading edge of the matrix 4 is then fastened to the grippers 31 so that it rests in the developer solution and the matrix bracket 29 is raised so that a pin 43 on a cam 32 connected to bracket 29 enters a notch 44 in a spring 37 urged lever 35 to lock the clamping bracket 29 in the position adjacent the drum 3. Simultaneously a lip 41 on the lever 35 pivots a lever 55 (Fig. 16) which closes a switch 58 to start a time motor and energize a solenoid 61 which pivots a lever 62 to close a switch 63 and to withdraw claw 88 from a recess 92 in a disc 89, fixed on the drum shaft so that the drum is free to rotate. The time motor rotates a cam for a predetermined time. When a projection on the cam closes another switch in the drum driving motor circuit the drum is caused to rotate. During this time the clamp 18 is held away from the drum by projection 22 on said clamp riding on a cam 32 on the drum. The drum then rotates until the projection rides off the cam and the clamp is spring urged against the drum drawing the matrix 4 round a roller 45 over a squeegee blade 48 and round the drum 3. As the drum nears the end of one revolution a pin thereon moves a flange 52 on a lever 35 (Fig. 12) clockwise against the spring 37 thereby releasing the pin 43 in the notch 44 and the matrix clamp bracket 29 which opens a microswitch 58 (Fig. 16). The solenoid 61 and the timer motor continue until a second projection on the time cam opens the switch to de-energize the solenoid and stop the motor. The motor driving the drum continues to operate and to rotate the drum until the follower of a cam rotating with the drum enters a recess in said cam and opens two electrical contacts in the solenoid circuits. The motor continues to rotate until another cam follower enters a notch in another cam which opens a switch in the motor circuit. The drum continues to rotate by inertia until it is locked in its original position by the claw 88 containing a notch in the disc 89. The matrix has thus been developed and wrapped round the drum 3. Specifications 655,274 and 713,729 are referred to.