Patent GB-150696-A (GB)
Title: An improved machine for treating hides, skins and leather
IPC: C14B1/10
Filed: 1920-08-30
Abstract: 150,696. Turner Tanning Machinery Co., (Assignees of O'Donnell, J. W.). Aug. 30, 1919, [Convention date]. Rotating-tool machines and apparatus.-Relates to machines for unhairing, setting-out, putting- out and the like operations, of the kind in which the work is gripped between a feed-roll and the bed roll which are positively driven to feed the work past one or more bladed cylinders or like rotary tools, both feed and bed rolls being movable into and out of operative position. The invention comprises means for mounting and actuating the feed and bed rolls so that in the inoperative position a wide opening is provided for the insertion of the hide or skin, whilst in the operative position the grip between the feed and bed rolls is automatically increased when a thick portion of the hide or skin is interposed between the bed roll and the rotary tool or tools; means are also provided to support the journals of the bed roll against the increased strain. The rolls are shown in operative position in Figs. 6 and 7, the hide being gripped between the bed roll 13 and the feed roll 14 and 'drawn past a pair of rotary bladed cylinders 10, 12, the cylinder 10 being mounted in fixed bearings on a shaft carrying the main driving pulley and the cylinder 12 being adjustable to and from the bed roll and lower bladed cylinder as shown in Fig. 6. The bed roll 13 is carried by crank arms 25 on a shaft 26 which also carries a crank arm 43 connected through a rod 44 to an eccentric sleeve 45 on the shaft 47, the bed roll being thrown into or out of operation when the shaft 47 is rotated through a half revolution. The feed roll 14 is carried by crank arms 34 on a shaft 35 and the shafts 26 and 35 are connected by cranks 40, 42 and an adjustable link 41 so as to move the feed and bed' rolls into and out of operation in proper relation. The rolls 13, 14 as well as the work roll 12, are mounted in yokes 24, 33, yieldingly secured in their housings by screwed rods 38 extending therefrom and engaged by nuts 37 bearing against sleeves 39 screwed into the housings and regulating the compression of springs 36. The machine is so arranged that when in operative position the bed roll lies between the working cylinders and a vertical plane passing through the axis of the feed roll, whilst it lies with its supporting yoke 24 upwardly inclined and below an horizontal plane passing through the arms of the cylinder 12, the arrangement being such that the bed roll yields with its yoke without displacing the supporting crank arms 25 when a thick portion of the hide is being worked, thereby automatically increasing the pressure or grip between the feed and bed rolls. In setting up the machine, coarse adjustment of the rolls is effected by adjustment of the crank connecting rod 41, whilst fine adjustments are provided for by the mountings shown in Fig. 6. To support the journals of the bed roll against the increased strain, a collar 50 is interposed at each end between the bed roll and its bearing, each collar being formed with a threaded boss in which is secured, by a. lock nut, a threaded strut 52 with a rounded end seated in a socket in a plate or cap 55 secured to each crank arm 25. In its operative position the bed roll is positively driven from the feed roll 14 by gears 60, 61, the feed roll being driven from the lower working cylinder 10 by gears 62. 63 and chain-gearing 65, 69, shown in Fig. 1. The shaft 47, carrying the eccentric 46, is also connected to the main shaft carrying the cylinder 10, by a gear train 80, 81, 83, 84, the intermediate gear 83 being normally loose on the countershaft 82 and rendered fast when required by clutch members 85, 86. The clutch-operating lever 87 comprises an arm on a rock shaft 88 which also carries an arm 89 with a toothed sector meshing with a similar arm 90 on the rock shaft 91 to which the treadle 92 is attached. The treadle is depressed to throw the clutch into operation, whereupon the eccentric shaft 47 is rotated to move the feed and bed rolls into or out of operative position, rotation of the shaft 47 being arrested after a half revolution by engagement of a lug 94 on an arm 93 on the rock shaft 91 with one of two diametrically opposite recesses 95 in an annular flange 96 on a disc 97 secured to the shaft 47, the treadle being released to permit this action which is effected by a spring 99 connected to an arm 100 on the rock shaft 91. The blades on the upper and lower work cylinders may be of the same or different pitches, the cylinders may be of the same or different diameters and may be run at the same or different speeds. Rolling, samming and squeezing. - Under the increased pressure the feed-roll 14 is stated to have a beneficial rolling action on the hide or skin. When used for setting out, the feed roll may be provided with a metal sleeve 110, but when used for putting out a felt sleeve is preferred.