Patent GB-339939-A (GB)
Abstract: 339,939. Armstrong Cork Co., (Assignees of George, A. M., and Kaufman, W. F.). Nov. 20, 1928, [Convention date]. Embossing processes and machines. - Inlaid linoleum or similar material, Fig. 1, is embossed between embossing elements comprising rollers 9, 10 in the form shown, the phase relation between which can be altered during the running of the machine so as to correct any difference of register between the embossing and the pattern due to flowing or creeping of the material. The material S passes between a calendering-roller 2 and a rubber blanket 4 supported by small rollers 7 in a loop extending downwardly from rollers 6, 6a. Rollers 8, 8<a>, 11 guide the material over the impression cylinder 9, and further guidepolls 12, 13 cause a large vertical surface L of the material to be exposed for inspection by the operator. The rollers 8, 8<a>, 9, 11 are coupled together and driven through gearing 14 from an electric motor 15 which has a speed-control device 17 operated so as to increase or decrease the speed of the motor 15 according as the floating roller 7 is in its lower or upper limiting positions. A hub 20 on the roller 7 engages switch arms 19 connected through wiring to the device 17 so as to cause the operation thereof. The shaft 21, Fig. 2, of the impression roller 9 carries a gearwheel 22 meshing with a gearwheel 23 rotatable on a sleeve 24 keyed to the shaft 25 of the embossing-roller 10. Fixed to the gear 23 is a wormwheel 26 engaging with a worm 32 journaled in brackets 30 on an extension 29 of the sleeve 24. A stub shaft 33 on the extension 29 is coupled to the worm 32 by bevel-gearing 34 and carries a sprocket wheel 42 connected by a chain 41 to a sprocket-wheel 40 on a sleeve 39 freely rotatable on the shaft 25. A second sprocketwheel 38 on the sleeve 39 is coupled by chain and reduction gearing to an electric motor 35 controlled by a rheostat 43. If the worm 32 does not rotate about its axis, the gear 23 rotates with the sleeve 24 so that the two rollers 9, 10 rotate at the same speed. For this purpose the motor 35 is caused to drive the sleeve 39 at exactly the same speed as the shaft 25. If however the embossing is not registering with the inlaid design, the speed of the motor 35 and therefore of the embossing-roller 10 is altered and so the phase relation between the rollers 9, 10 is adjusted. The gears 22, 23 may be designed so as to compensate approximately for the flowing of the amount of this is known, in which case a modified adjusting means, Fig. 4, is provided. The shaft 25 extends partly into and is keyed to the wormwheel 26, into the hub of which extends a shaft 44 to which the gearwheel 23 is keyed. Fixed to the gear 23 is a bevel-gear 46 which drives through intermediate gears 47 a bevel gear 50 itself driving a further bevel gear 57 through intermediate gears 51, the gears 50, 57 being free on the shaft 44. The gears 47 are carried by pins 48 fixed to a frame 49 and the gears 51 are similarly carried by a ring 53 which can be rotated in the frame 49 by means of worm-andwormwheel gearing 55 operated by a handwheel 56. A sprocket wheel 40 is fixed to the hub of the gear 57 and is coupled by gearing 41, 42, 34, 32 to the wormwheel 26 as before, the extension 29 in this instance being keyed to the shaft 44 The gearing is such that the shaft 25 is driven at the same speed as the gear 23 unless the worm 32 rotates on its axis and this can be achieved if the designs become out of register by rotating the handwheel 56.