GB552392A - An improved machine for carrying out pressing and other operations on strip material - Google Patents

Abstract

552,392. Cables. BRITISH INSULATED CABLES, Ltd., HARGREAVES, E. S., and STEWARD, H. M. Sept. 1, 1941, No. 11131. [Class 36] [Also in Groups XXII and VIII] In a press for stamping, cutting, punching &c. strip material, two strips are operated on simultaneously and are then combined. with a preformed core to form a high-frequency cable. Two strips 1 may be fed from drums 38, 39, Fig. 8, by dies 4, 6, Fig. 1, of which the dies 4 are fixed to, and 6 are vertically movable on a slide 3 which is reciprocated on bars 7 by crank discs 8 and rods 9. The dies 6 are pressed away from the dies 4 by springs 17 and are connected to the slide 3 by a parallel motion device 14, 15. During the movement of the slide 3 to the right, rollers 21, on levers 58, engage cams 22 and force the dies 6 towards the dies 4 thus giving a corrugated channel form to each of the strips 1 between them while feeding them. During the return movement of the slide 3, the steep faces 26 of the cams engage the rollers 21 swinging them aside so that the dies do not engage the work which is retained by weighted detents 33. Cross bars 37, attached to the moving dies, free the strips from the fixed dies 4. In a modification, Figs. 5, 6, these bars may be replaced by strip guides 92, 98. Side guides 86 and tensioning device 96 may be provided between the supply drums and the dies. The strips may be looped over guides 67, Fig. 8, and fed continuously, by means not shown, through guides 69, 70, which apply it to a core 2, and through a rotary device 73 which applies a helical tape. The fixed dies may be adjusted laterally by screws 88, Fig. 6, and the outward movement of the dies 6 be limited by nuts 20 on rods 19.