GB452672A - Improvements in and relating to triple roller and other mills such as are used for grinding of paints and other substances - Google Patents

Abstract

452,672. Toothed gearing. COX, H. E., 131, City Road, Bristol. April 23, 1935, No. 12125. [Class 80 (i)] [See also Group II] In a roller mill for grinding ink &c. provision is made for the adjustment of intermediate gear-wheels in relation to the gear-wheels on the roll shafts by a movement of the intermediate wheels in a direction parallel or substantially parallel to the slides of the roll bearings. As shown applied to a mill having three rolls 1 ... 3 arranged horizontally, the end rolls being adjustable toward the centre roll, the velocity ratios of the gear trains provide a high velocity ratio for the roll 1, an intermediate velocity for the roll 2 and a low velocity for the feed roll 3, the actual speed of the rolls being determined by the gear ratios employed. The intermediate gear-wheels are mounted on stub axles 12, 17, 22 carried by blocks 6, 18, 37 slidable on rods 38 arranged parallel to the slides carrying the bearings of the rollers, the blocks being spaced apart by distance pieces 43 and by the nut of a screwed rod 44. The two end blocks are adjusted on the rods by compression screws 41 and tension screw 42. A main drive shaft 4, mounted on the block 6 or casing is provided with a gearwheel 8 and drives roll 1 through gears 9, 10, or drive shaft 4 may drive gear 9 directly. The roll 2 is driven by two stages in tandem comprising wheels 9, 13 and 14, 15, and the roll 3 by a gear-wheel 23 on the sleeve of the gear-wheels 13, 14 engaging a gear-wheel 24 driving sprockets 26, 27 by a chain 32, and thence gear-wheels 28, 29. The chain 32 is tensioned by a sprocket 33 eccentrically mounted on stub axle 17. The stub axle 25 on which the wheel 24 revolves is mounted on a bracket 31 from the block 18, but it may be mounted on an arm pivoted about the axis of stub axle 17. The gear-wheels may be spur, single or double helical, sprocket for chain drive &c. and the planes containing the axes of the shafts 4, 22 may lie inside the planes of axes of the shafts of the outer rolls.