Patent GB-469556-A (GB)
Title: Improvements in a method of and machine for marking leather and the like
IPC: C14B1/00
Filed: 1936-01-27
Abstract: 469,556. Linear - dimension gauges. KLEINSCHMIDT, H. E. Jan. 27, 1936, Nos. 2473, 2474, and 2475. Convention dates, Jan. 26, 1935, April 5, 1935, and July 17, 1935. [Class 106 (ii)] The thickness of sheet material such as leather is measured mechanically at a plurality of points distributed over the surface of the material and recorded on the material at or near the points of measurement. The measuring and marking " aggregates " of which there are several are adjustable longitudinally in guides 15 on a frame 2 connecting two standards which support bearings for a roller 7 driven through reduction gearing from an electric motor. The lower part of the slide is traversed by a shaft 19 supporting three oscillating- frames 20, 21, 22. The side cheeks of these frames are connected at the front by ledges 20a, 21a, 22a and are provided with bearings for rollers 23, 24, 25 of which the roller 24 " feels " the thickness of the leather while the rollers 23, 25 are holding and smoothing rollers. The rollers are pressed against the surface of the leather by coiled springs 26 fixed at one end to a cross-bar 27 of the oscillating frame and connected to a fixture at the other end by a screw and nut. A hand lever 32 may be rocked to left the rollers by oscillating the frames through links 35 connected to the shaft 27, such lever also working a bolt 39 by pin and slot to lock the slide. In the slide block are two vertical plates 44 serving as bearings for three rollers 45, 46, 47 over which passes an endless stencil band 48 passing near where the roller 24 touches the leather. Two small guide rollers 48a are adapted to take part in the movement of the frame 21. A pin 52 projecting laterally from the oscillating frame of the roller 24 extends through a slot 53 of the plate 44 and engages a piece 50 to which are attached side pieces 49. A colour band may pass around rollers 48a and rollers at the upper corners of the piece 50. Gearing with a wheel on the axis of roller 47 is a wheel 61 on the axis of which is a small wheel 62 gearing with a segment 63 centring about the shaft 19. The rocking of the roller 24 is thus transferred into linear movement of the band 48. A guided stamp 66 with a pad 65 is raised against the influence of a spring 68 by a cam wheel 72 on the axis 73 of the roller 25 and when the cam releases the pin 71 delivers a blow on to the band 48. In a modification, the printing is by electromagnetic means. The stamp 66 forms the core of a solenoid fixed to the oscillating frame 22. By providing contact strips on the stencil band to co-operate with an adjustably fixed contact, printing may be made only at spots of predetermined thickness. In a further modification, Figs. 15, 16, six aggregates are fixed to a cross-girder above a long roller 216. For each two carriers 201, 202 and two rollers are provided. The carriers are guided on small rollers between U-irons 204, 205 extending the length of the machine. The carriers are provided on top with projections 201a, 202a of which the first rests on the second. The rollers are pressed towards the leather by strong spiral springs 217 acting on the carriers. The marking band 226 is mounted on the carrier for the measuring roller and moves up and down with it. The marking bolt 223 is of soft iron down to the lever 224 and below that of brass, and is suspended by a spring 225. A head. piece at the lower end acts upon the band. The latter, which is of rubber, is guided over rollers 228, a colour band 227 being guided over pins 229. A lateral projection 234 at the upper end is provided with a contact 236 adapted to engage a contact plate 237. These are in shunt to the circuit of a solenoid 222 and when they contact interrupt the circuit of the solenoid upon which the bolt is withdrawn by its spring. In the circuit of the solenoid, Fig. 19, is a brush 241 co-operating with a contact 241a on the counter roller 216 so that at each contact the solenoid is closed and the marking bolt attracted. By selecting one of several rows of contacts, the distance between the markings may be changed at will. The band is displaced in correspondence with the thickness of the leather by a rack 243 on the carrier 201 and gearing to roller 242. By lifting the carrier 202 by means of a cam 26], the rollers are raised to insert leather. The table for the feeding in is inclined down and away from the roller on each side, in addition a bent piece carrying a glide roller bearing on the leather in front of the machine may be moved by a treadle. Further improvements provide means for stopping the actuation of the printing apparatus when irregularities occur such as the hide having points of abnormal thickness. The Specification as open to inspection under Sect. 91 comprises also the following subjectmatter. For stiff and more or less undulating material, instead of the counter roller 7, a short counter roller mounted rigidly on the same unit with the feeling roller is provided. Each unit is mounted on a separately pivoted frame slotted to pass the leather and spring supported at the front or printing end. In the case of leather full of boils, special rollers may be fitted in front of the usual rollers. For this kind of leather, the measuring and marking rollers may be distributed in great number over a plate 103, Fig. 17 (Cancelled), above a slot 107 into which the hide is introduced, and the aggregates lowered on to it. Each aggregate consists of a hollow piston 111, Fig. 20 (Cancelled), guided in the top plate 103. Ears 112 on the piston are guided over rods 113, the piston being forced upwards by springs 114. The marking band 48 passes over rollers 45, 46, 139 and the driving roller 47. An arm 126 on a shaft 127 rocked by mechanism driven from a motor engages a disc 124 through a pin-andslot mechanism 125 and periodically forces the disc down and also through the medium of a spring 131, the piston 111. A driver disc 132 rests on a stamp, not shown, alongside the feeling plunger 121 and acts through a weaker spring 133 to stamp the leather. The rod 120 positions the roller 47 through rack and pinion gearing. Tinging rollers 140, 141 co-operate with a roller 139. The levers 126 may act slightly one after the other. The discs 124 may be actuated by bolts 142 depending from plate 104 actuated by hydraulic means 106, Fig. 17 (Cancelled). In a still further modification, Fig. 30 (Cancelled), instead of the large roller 216 a table 306 is employed. The leather is moved intermittently over the table and the measuring and printing takes place in the pauses. Each feeling element comprises a square piston 308 having a central base for the marking stamp 309. A spring 318 is located between this piston and a second piston 315 into a hollow of which the stamp projects. A cam 333 acts to press the piston 315 downwards at intervals. The stamp moves up and down with the piston 308. A rubber printing band with relief type is fed by the disc 320, being moved through rack 326 and gearing from the piston. A tensioned watch spring in the disc 320 takes up slack. The roller on the other side corresponding to the disc 320 may also be driven. The feed of the leather is effected by a roller on the discharge side of the machine on the shaft of which is a cam which lifts the counter rollers and interrupts the feed, also operating the shaft of the printing mechanism. This subject-matter does not appear in the Specification as accepted.