Patent GB-492374-A (GB)
Title: Improvements in a machine for marking leather and the like according to thickness
IPC: C14B1/14
Filed: 1937-01-15
Abstract: 492,374. Linear-dimension gauges. KLEINSCHMIDT, H. E. Jan. 15, 1937, Nos. 1311, 1312, and 1313. Convention dates, Jan. 15, 1936, Sept. 30, 1936, and Jan. 7, 1937. Addition to 469,556. [Class 106 (ii)] The machine for marking leather &c. according to thickness as claimed in the parent Specification is modified by constructing the feelers which control the operation of printing so as to flatten out the leather, separate smoothing or flattening elements being dispensed with. General arrangement. Two channel irons 1, 2 extending the whole length of the machine, together with an I-beam 10 forming a table are supported on pedestals 15. The irons 1, 2 are provided with bearings for a cam shaft 9 preferably formed by several short shafts connected by claw couplings, and support a series of measuring units. The shaft 9 is driven by a chain 8 running over sprockets 20, 21 from a motor 7 through a reduction gear. A stud 27 on the wheel 23 is adapted to engage slots 28 in a Maltese cross 5 mounted on the shaft 29 of the feed roller 3 which is then rotated intermittently. A spring-pressed roller 4 above the roll 3 is carried by a piston 31 sliding in a fixed cylinder 32 and connected by a cable 34 passing over a pulley 35 to an arm 37 on an axle 16. By depressing the pedal 17 the roll 4 is raised to admit leather. Electric contacts are arranged to stop the motor when no leather is present between the rolls or if the rolls are separated more than a certain distance. Contacts on the cam shaft and on a spring lever 54 permit the motor to run until all printing and measuring parts are raised. Measuring and stamping units. Each unit comprises two skeleton pistons 58, 59 guided between the irons 1, 2. The driver 58 has a bearing for a roller 61 adapted to co-operate with a cam 62 on the shaft 9. The pistons 58, 59 are pressed apart by a powerful spring 63 the pressure of which is taken by a tubular sleeve 65 passing through the piston 58 and screwed into the feeler 59. A rod 68 passes through the sleeve and ends in a head 69. The marking band 71 of spring steel is guided over rollers 72 in a groove of the feeler 59 and over pulleys 73 each mounted on a lever 74, 74a these being pivoted symmetrically and connected by a link 75 passing through slots in the irons 1, 2 so that when both pulleys 73 with their levers swing inwardly or outwardly symmetrically to the central plane of the machine. The further guiding of the band is by discs 82, 83 of which the disc 82 is toothed to engage corresponding holes in the band, this disc being geared through toothed wheels 87, 88, 90, 91 with a wheel 92 meshing with teeth 94 on piston 59. Thus, downward movement of the piston is multiplied by ten and transferred into movement of the band. Instead of a rack and pinion, a metal band may be connected to the piston 59 and to a disc substituted for the wheel 92. Upon the sleeve 65 are loosely mounted at a certain distance apart two annular disc stops 99, 100. The upper one 99 is connected to the rod 68 by a pin 101 guided in a slot 102 in the sleeve 65. The lower disc 100 is connected to the rod by a pin passing through a slot 103 in the sleeve. Between the discs 99, 100 is a spring 105 and between the disc 100 and piston 59 is a weaker spring 106. The disc 99 bears against an extension 107 of piston 58. The head 69 extends laterally over the band 71 and carries a projection 108 on which is a V-mark. The band has a covering of rubber bearing graduations from 110 to 111 of thickness of material in millimetres. Inking. A small inking roller 113 for the mark 108 is journalled in a bracket riveted to the band and takes up ink from a pad 116. An inking roller 122 is engaged by a roller pad 127 and is forced against the band 71 by a spring 128 engaging lever 123. A separate pair of rollers like 3, 4 and further contacts may be arranged at the delivery side of the machine one of which is driven from the roller 3 and at a slightly higher speed. The stoppage is effected then only when the rear edge of the leather has passed beyond the second pair of rollers. In order that the leather may be inserted to the correct extent between opened rollers, a stop grating is lowered through holes in the flange as soon as the roller 4 is raised to introduce the leather, and raised when roller 4 is allowed to drop. The units may be arranged in a plurality of rows instead of a single row and the leather may be measured and stamped in one operation.