Patent GB-911162-A (GB)
Title: Selective embossing machine
IPC: B41K3/08
Filed: 1959-08-21
Abstract: 911,162. Selective embossing. SCHILLER, P. Aug. 21, 1959 [Sept. 3, 1958], No. 28661/59. Class 100 (4). A selective embossing machine for metals or plastics has displaceable impact types on a rotatable control drum and is operated by a compressed-air geared piston system. A piate 8 is clamped on a slide 6 movable in a linespacing direction, on a slide 5, which is movable in a letter-spacing direction below a drum 23 in which impacts type 22 are removably held at the bottom by a retainer 74, Fig. 9, and at the top by means of a spring-urged pin 79 withdrawable by a segment 81 to allow substitution of different type. Embossing is effected by a hammer 73 actuated by a piston 30. The machine is operated by compressed-air supplied through a pipe 29, Fig. 4, under the control of key valve 33. The pipe 29 through a pipe 35 supplies pressure through a groove 36<SP>1</SP> and a pipe 37 to a chamber 39 to move a piston 38 to the right, expelling air for the chamber 40 through pipe 41, groove 36<SP>11</SP> and a pipe 42 to atmosphere. Depression of a key 32 by its associated valve 33 allows air from a pipe 29 to reach pipes 34, 55 through a groove 30<SP>1</SP>, pipe 31 and a groove 33<SP>1</SP> and from the pipe 34 to enter a chamber 43 forcing the piston 36 to the left to connect the pressure pipe 35 to atmosphere through a pipe 45 thus cutting-off pressure from the chamber 39 and allowing pressure for the chamber 43 to enter a chamber 40 to force the piston 38 to the left until this is arrested by a profiled plate 46 engaging the depressed key 32. Movement of the piston 38 through a raok-and-pinion 47, 48 and gearing 50 to 53 rotates the drum 23 until the plate 46 is arrested with the type corresponding to the key depressed in the impression position. Pressure through the pipe 55 moves the piston 56 to the right under the control of a throttle 61, until, after a. time delay in which the drum 23 is correctly positioned, pressure is admitted through a duct 65, Fig. 9, to actuate the piston 30 to operate the hammer 73 to cause impression. Movement of the piston 30 disconnects the supply pipe from pipes 31, 34, 55 so that the pistons 36, 56 are rotated by their springs 44, 57 and pressure thus readmitted through the pipe 37 to the chamber 39 restores the piston 38 to the right and with it the drum 23 to its initial position. A setting- screw 19 acting through worm 71 and gear 70 adjust the cylinder 69 vertically and thus vary the impression force of the hammer 73. By a different clamp on the slide 6 bars or other shaped objects can be embossed while if required an ink ribbon can be interposed between the type and the article. Letter-spacing movement is effected by a piston 84, Fig. 5, operated by compressed-air from the chamber 43 when a key valve is depressed. The piston acts through a clutch 90 and rack-and-pinion 103, 102 can move the slide 5 a letter-spacing adjustable by a segment 85 moved by a setting-screw 18. The piston can be moved for a single letter-spacing by hand by a lever 14, Fig. 5, while longer movement of the plate is also affected by a knob 16 acting through gearing 97, 98, 100, 101. A key 15 can move a gear 94 out of mesh with a gear 92 to allow the slide 5 to be freely positioned by hand. Line-spacing is effected by a knob 17 acting through gearing 109 to 112 to move a rack 21 of the slide 6. Correct spacing is ensured by detent balls 116 entering holes 115 in a rack 114 driven by a gear 113. A fine adjustment is secured by a spindle 20 acting directly on the rack 21.