32 



THE INDIA RUBBER WORLD 



[October 1, 1920. 



radiation surfaces of the platen edges; greater comfort for the 

 workers because of less heat in the curing room ; saving of 

 space, as generally twice as many steel platens as cast iron can 

 be installed in the same press. The thickness of the steel platen 

 is usually IK- inches as against Ayi inches of the cast iron; 

 doubling of output on the same number of presses; greater dura- 

 bility. The steel platen is practically indestructible. It will not 

 crack nor explode from alternate heating and chilling. The 

 greater hardness of the surfaces prevents pitting. ( South wark 

 Foundrv & Machine Co., Philadelphia, Pennsylvania.) 



NAPHTHA AMD CEMENT BENCH CANS 



A novel type of cement can and an improved dispensing can 

 for inflammable liquids are among the most interesting of the 

 new products supplied to the rubber trade and especially to 



rubber footwear manufacturers. 

 The cement can is made on 

 up-to-date non-explosive lines. 

 It has a shut-off gate which 

 regulates the flow. The sup- 

 ply trough is fitted with a 

 spring-closed cover. It is filled 

 through the opening at the top 

 over which is fitted a remov- 

 able cover. This opening is 

 large enough to make cleaning 

 easy. The fusible latch which 

 closes the cover when it melts 

 prevents explosion and confines 

 the fire to one spot. The can 

 cannot explode and s c a 1 1 e r 

 burning cement over a large 

 area. It is made in one size 

 o n 1 y, holding approximately 

 one-half gallon. 



The improved naphtha dis- 

 pensing can is designed for the 

 safe and economical use of in- 

 flammable liquids, and its con- 

 struction is such that in case of fire its contents will blow off 

 and burn slowly rather than explode and scatter. 



It consists of a large, air-tight 

 chamber or reservoir which is con- 

 nected with an open, spring-pres.sed 

 cup by means of a spout and a ball 

 valve. A slight pressure on the cup 

 allows the ball to drop from its seat 

 and the liquid flows freely into the 

 open cup which, when released, re- 

 seats the ball, thus stopping the 

 flow. The vacuum principle controls 

 the feed, and makes overflow impos- 

 sible. All necessary parts 

 are manufactured of non- 

 corrosive metal. The rest is 

 cast iron. It is made in one 

 size only, holding approxi- Naphtha Bench Cax 



mately one quart. (The 



United Shoe Machinery Corporation, .\lbany Building, Boston, 

 Massachusetts.) 



Cement Bench Can 



CRANE FOR GIANT PNEUMATIC TIREIS 



With the increase in size and added weight of giant pneumatic 

 tires comes the need of a device for conveniently handling motor 

 truck tires and wheels. With the crane here shown, it is 

 claimed that one man can handle any size of wheel or solid 



tire, special grab hooks being furnished for use with pneumatic 

 tires. The crane works in small clearance between tire and 





Atlas Wheel Crane 



fender or body. To provide for variation in wheel diameters, 

 the crane arm may be pivoted at two different heights, thereby 

 permitting two different ranges of vertical lift. Moreover, the 

 crane will pick up wheels which are standing on the floor. (The 

 Thompson Auto Specialties Co., Columbus, Ohio.) 



STEEL WIRE BUFFING WHEEXS 



Steel wire buffing wheels are _ 



indispensable in tire making 

 and repairing. The old-type 

 solid wire brush has long 

 since been displaced by wheels 

 made up of sections that tit 

 on a permanent hub. When 

 the sections wear out new 

 ones are replaced on the old 

 hub and the brush is as good 

 as new. A recent type of 

 steel wire brush is called 

 the "Sampson," section of 

 which is shown in the ac- 

 companying illustration. 

 (Chas. E. Miller, Anderson Rubber Works, .Anderson, Indiana.) 



Sampson Brush Section 



MACHINERY PATENTS 

 MOLDING INNER TUBES BY THE PNEUMATIC PROCESS 



TWO-PART HOLLOW RunBER .\RTICLES, such as inner tubes, are 

 made by this process, whereby the parts are first cut from 

 a sheet, formed in a mold which causes the edges to adhere, 

 and then removed to a vulcanizing mold in which they are 

 seated by internal pressure. 



In carrying out this process a square sheet of raw rubber is 

 laid on the upper surface of the plate A and a similar sheet is 

 laid on the table B, shown in Fig. 1. The vacuum plate is then 

 brought to a position directly over the table, the pedal C oper- 

 ated to raise the table, bringing the rubber sheet thereon into 

 contact with the under side of the plate, whereupon the valve D 

 is operated to apply vacuum to this plate, thus drawing both 



