Patent GB-1045232-A (GB)
Title: Improvements in or relating to printing apparatus
IPC: H04L17/28
Filed: 1965-04-20
Abstract: 1,045,232. Selective printing. SIEMENS & HALSKE A.G. April 20, 1965 [April 21, 1964], No. 16628/65. Heading B6F. [Also in Division F1] A type-carrier for a printer operated in response to a binary code is positioned in two co-ordinate directions, e.g. rotatively and axially, by fluid-actuated devices 14, 15, 16, selectively operated by decoding means comprising multi-path spool valves 10, and spool valves 8 controlled by electromagnets 7. In the embodiment shown, a three-bit binary code is applied to three electromagnets 7 and simultaneously with the reception of this signal, oil from a source 1 and pump 2 is supplied to a rotary spool valve 4 and this supplies oil under pressure to the three spool valves 8 which are displaced against the action of springs 9. This mechanically pushes the armatures 6 of electromagnets 7 against their cores and if a signal is present are held operated. These valves 8 control the movement of the multi-path spool valve 10 and according to the code signal received, a through path is made to one of either control pistons 12. The oil passages to the remaining seven control pistons are blocked. Control piston 12 in its working position (left-hand piston shown on, Fig. 1) together with the most rightward piston 12, are coupled to a pair of type-carrier setting pistons 15, 16 which act on the periphery of a setting disc 13. Other six control pistons 12 are likewise connected to type-carrier setting pistons 14, the travel of which are limited by stops 17. The disc 13 is connected to a sector 35, Fig. 9 (not shown), and the type-carrier is set with required type in printing position. Similar mechanism, Fig. 10 (not shown), controls the axial positioning. In the embodiment described with reference to Fig. 13 (not shown), rotational adjustment is effected by the co-operation between a stop 124 on the type-roller spindle and a selected hydraulically-operable stop or locking-pin 98... 113. The type-roller is driven either through a friction coupling or an hydraulic motor in association with an hydraulic shockabsorbing device. Axial setting is effected by four pistons 118-121. The combination of sixteen rotary stop positions and four axial positions enables sixty-four different characters to be printed, but the apparatus may be adapted for 128 characters. Fluid-impression arrangements.-The rotary selector 4 is stepped at the appropriate moment to operate a piston 18, Fig. 5 (not shown), to effect impression. In the embodiment described with reference to Fig. 13, the piston tensions a spring which is released to effect impression. Step-by-step strip feed.-A strip 20 is advanced by a further position of the rotary selector 4 whereupon one fluid-operated gripper 30, 31 Fig. 6 (not shown), is operated to grip the strip, then the gripper itself is moved by another fluid-operated piston 29. Upon release and return of the gripper, the strip 20 is held by a further fluid-operated gripper 33, 34 to prevent backward feeding. Punching in addition to printing.-Oil-operated punches 26, Fig. 4 (not shown), or 126, Fig. 13, may be simultaneously operated.