178 



THE INDIA RUBBER WORLD 



December 1, 1920 



of materials. \ot over j4-h.p. is required to operate the largest 

 machine while the smallest designed for laboratory work requires 

 only 'A-h.p. — The J. H. Day Co., Cincinnati, Ohio. 



.same time, and as it is equipped with an automatic starter, an 

 ine.xperienced workman can operate it without any trouble. — 

 Hisey-Wolf Machine Co., Cincinnati, Ohio. 



GRINDING MILL FOR RUBBER MANUFACTURERS 



This grinder should be of interest to any one who has to 

 grind hard rubber dust, asbestos, scrap leather, and fabric used 

 in making composition soles. Its usefulness is, of course, not 



confined to these items 

 alone, as it can be used 

 for grinding a wide 

 range of compounding 

 ingredients. The chief 

 feature of construction 

 is the horizontally placed 

 grinding surface, which 

 causes the material to 

 work gradually and 

 evenly outward from the 

 center into the annular 

 .■liaml)€r which encircles 

 tlic grinding plates. This 

 chamber terminates in a 

 rectangular mouth-piece 

 near the top of the ma- 

 chine, whence the material is carried into the receiving bin. 

 The mill is cyliiidrically shaped with the hopper or feed inlet in 

 the center of the top plate. The grinding medium consists of two 

 taper-disked steel plates fitted with steel pins. The top plate is a 

 fixture bolted down to the body of the machine, but the lower 

 plate rotates by means of a worm spindle driven by a worm wheel 

 connected with the shaft. A combination gear, enveloped and 

 locked up in an oii balh, gives the necessary high speed for fine 

 grinding. — Chemical Engmeering Co., Limited, Manchester, Eng- 

 land. United States aj,ents, J. P. Devine Co., Buffalo. New York. 



"Kek" L'xivers.\l Grinding Mill 



TIRE ROUGHING AND BUFFING MACHINE 

 This machine has demonstrated its usefulness not only in tire 

 factories, but also in the retreading and the repairing of tires. 

 It is simple in design, ruggedly constructed for bard service, and 



to meet the require- 

 ments of the largest 

 pneumatic tires. 



The spindles are 

 of one-piece con- 

 struction and are 

 made from high- 

 grade steel. All the 

 wheels are fitted 

 directly on the 

 spindles, which with- 

 stand a 1 1 working 

 loads and pres- 

 sures without being 

 thrown out of aline- 

 ment. The bearings 

 are completely enclosed from dust and grit, and they are pro- 

 vided with heavy felt protector washers on each side of the 

 bearing housing. Every machine is fitted with a quick-acting 

 switch. The operating handle is conveniently located in front 

 of the motor, with the switch enclosed in the base. This insures 

 the best possible protection and permits ready access to the 

 switch mechanism by simply removing the cover plate. The 

 motor parts need not be disturbed. The motor is arranged 

 either for direct or alternating current. The machine in the 

 illustation is supplied with a rasp for coarse work, and a bufiing 

 wheel. Heavy felt, leather or grinding wheels may also be easily 

 fitted on the spindles. Two men can work at the machine at the 



Tire Buffer 



THE NEW PIERCE TIRE WRAPPING MACHINE 



The new Pierce machine for wrappmg finished tires with Kraft 

 or string-inserted paper in 2H-'nch widths, instead of the cus- 

 tomary 1^ inch, results in a saving of about 15 per cent on 

 material. 



A notable improvement in this machine is the bead-closing de- 

 vice which permits wrapping the tire when the beads are drawn 

 closely together, thus saving material and effecting a tight, perma- 

 nent wrapping. Another new feature is the location of the control 

 lever which is so placed that one operation disconnects the power, 

 applies the brake and opens and holds the bead-closing device 

 until the wrapped tire has been removed and another substituted. 



The edge folder has also been improved and an open back 

 type provided which is much more readily threaded than the old 

 one. The adjusting lever at the right of the operator permits 



P.M'Ek Wk.M'I'I.NG M.VLHl.NE 



instant adjustment for any sized tire between a 2^ by 28 to a 

 6 by 36. 



The taping attachment applies a strip of gummed tape to the 

 wrapping as it is being done, holding the layers together and 

 preventing unwinding if one should break. The shuttle revolves 

 between leather-faced pulleys which firmly support it and permit 

 of a high speed. 



This machine will wrap a tire of average size in eight seconds, 

 and in every day use handles about 1,800 tires per day. It is 

 driven by a motor directly connected, operating through a raw- 

 hide pinion, and with very little noise or vibration. — Pierce 

 Wrapping Machine Co., 617 Jackson Boulevard, Chicago, Illinois. 



YARWAY HOLTITE PIPE CLAMP 



Leaky joints and splits are common faults to all pipe lines. 

 The loss incurred through them often runs up into big figures. 



