THE INDIA RUBBER WORLD 



New Machines and Appliances, 



BIRJCINGHAM PNEUMATIC TIRE TREAD MACHINE, 



THIS machine is of special interest to tire manufacturers, as it 

 turns out treads superior to the hand-laid product, and at a 

 lower cost. Another advantage is in its adaptability for 

 laying up inner flaps — an item which is very large in some mills. 

 For treads the stock is prejiared in the usual manner, and is 

 then sheeted and 

 cut into strips on 

 a calender. The 

 rolls of stock are 

 taken to the 

 tread room. 



ried through a 

 stripping mechan- 

 ism by which the 

 rubber is sepa- 

 rated from the 

 liner, .\fter pass- 

 ing over the 

 driven roller at the top of the machine, the rubber strips make a 

 quarter turn and pass down over idler rollers through chutes, 

 which guide them to the center of a series of iron rollers run- 

 ning on a belt. The widest strip is first rolled on, then the next 

 widest and so on until the required number have been plied up 

 for the tread. By this method of laying each tread separately, all 

 possible entraining of air is prevented, and a more uniform tread 

 is obtained. [Birmingham Iron Foundry. Derby. Connecticut.] 



INSTALLATION OF WILLS' OVERFLOW TRIMMER. 



The perspective sketch illustrated herewith show's how 

 the Wills' overflow trimmer (described in The Indi.x Rubber 

 World. July, 1915, page 5441 should be installed to gain an 

 increase of 20 per cent in speed and cmtput on such articles 

 as heels, soles, valves, etc. 



The feed box. the trimmer, and the chute for the finished 

 heels are so arranged that the operator can readily take the 





-AViLLS 'Ueel 



heel from the feed box, trim it on the rotary shears and 

 drop it into the chute. Thus the cycle can be completed 

 without lost motion or time by the operator. 



As many as 3,000 pairs of heels per day can l)e trimmed 

 by the machine set up in this way, whereas, by hand, an 

 experienced operator can trim less than 1,000 pairs per day. 

 [A. J. Wills, North Brookfield, Massachusetts.] 



MILLER'S BOOT AND SHOE REPAIR VULCANIZER. 



This vulcanizer is apiiarently capable of doing almost any sort 

 of repair job. from leaky water bottles to bicycle tires. Specific- 

 ally, the manufacturirs reconunend this machine for repairing 

 footwear, footballs, hot 

 water bottles, inner 

 tubes and single tube 

 tires. 



The platen that car- 

 ries the various clamps, 

 plates and special ap- 

 pliances is mounted on 

 a strongly built frame, 

 supporting the gaso- 

 lene-heated boiler, 

 which is provided with 

 a steam gage, water 

 gage, safety valve and 

 a fuel tank. 



At the left is a steam- 

 jacketed cylinder for 

 repairing circular sur- 

 faces, and a plate, 

 curved to receive any 

 size boot or shoe sole, 

 is cast on the back of 

 the platen. The device 

 for repairing heels is 

 next to the curved sole mold, and the upright projection is an in- 

 side boot or shoe mold specially adapted for inside curing on 

 repairs that are so tedious by other methods. There is a flat 

 surface (6 x 10 inches) for vulcanizing, at one time, from three 

 to six tubes for automobiles or motorcycles, and in addition 

 there is one sectional bicycle mold for repairing bicycle tires. 

 [Charles E. Miller, Anderson, Indiana.] 



A MAGNETIC SEPARATOR PULLEY. 



This is designed to remmc pieces of iron and steel from pow- 

 dered rubber waste. 



The device consists of two pulleys mounted on a steel I-beam 

 frame with a conveyor belt running over them. One is a split 

 pulley of ordinary construction. The other is the magnetic pulley, 

 which is composed of electro-magnetic windings on steel bobbins, 

 placed between and doweled to steel discs keyed to the shaft. 

 The coils of the standard pulleys are wound for 110 and 220-volt 

 direct current, and are connected in series. The terminals are 

 brought through a hole in the center of the shaft to a pair of 

 cnllector rings placed beyond the bearings. These magnetic 

 pulleys are regularly made in sizes from 12 to 30 inches in di- 



ic current |iassin.c thniui;li the coils Converts the 

 . powerful electrii-magiiet. which attracts and holds 

 any pieces of iron or steel contained in the rubber waste that is 

 being carried along on the conveyor belt. .-Xs the normal speed 

 of this belt is 100 feet per minute, the waste and fiber are shot off 

 into a box as the belt turns around the magnetic pulley. The 

 iron and steel pieces adhere to the belt until they pass under 

 and beyond the pulley, when, losing the magnetic attraction, they 

 drop into another box under the belt. [Cutler-Hammer Clutch 

 Co., Milwaukee, Wisconsin.] 



