;h 1, 1916.] 



THE INDIA RUBBER WORLD 



291 



New Machines and Appliances. 



ROTARY VACUUM DRYER FOR RUBBER SCRAP. 



THE illustration shows a new Stokes rotary vacuum dryer 

 which has recently been installed and is now being operated 

 in the works of a large rubber company. The rubber is 

 claimed to be dried uniformly, economically and quickly. 



The apparatus is equipped with an agitator so that any ma- 

 terial carried over with the next charge will not become hard 

 by over-drying. This agitator, which requires very little power 

 to iiperate, discharges practically the entire contents of the 



machine and insures unifurmly dried material, containmg an 

 exact percentage of evenly distributed moisture. The rubber is 

 dried in vacuo at a very low temperature, thus giving a soft 

 and strong product. 



It usually takes si.x men over tuo liours to spread and take 

 (iff the ruljber when screens are used, but it is said that with 

 this vacuum dryer, three men can do the work in a half hour. 

 The drying is accomplished in from one to six hours, varying 

 with the nature of the scrap. The machine is fifteen feet long 

 by four feet in diameter and has a capacity of from 4,000 to 

 12,000 pounds in ten hours. (F. J. Stnkes Machine Co.. Phila- 

 delphia. Pennsylvania.) 



MULTIPLE EXPANSION JOINTS. 



Multiple plate vulcanizing presses that 

 are used in the manufacture of molded 

 rubber goods have from two to seven 

 heating platens. To turn out reliable 

 goods exact temperatures are now required 

 Ml most rubber manufacturing plants. It 

 is therefore necesssary that all plates in 

 vulcanizing presses should be maintained 

 at the same temperature. This is practi- 

 cally impossible, however, where the steam 

 is passing directly through the press, as 

 the drop in temperature is usually about 

 2 degrees F. from one platen to the other. 

 The multiple expansion joint shown in the 

 accompanying illustration supplies steam to 

 each plate independently, thereby maintain- 

 ing an even temperature throughout the 

 press. The advantage in thus being able 

 to obtain definite cures will appeal to every 

 manufacturer of molded rubber goods. 

 (Utility Manufacturing Co., Cudahy, Wis- 

 consin.] 



SEWING MACHINE FOR RETREADING TIRE CASINGS. 



For tire repair shops that make a specialty of repairing tire 

 casings, the machine illustrated herewith should prove useful. 



If the re-treaded casing is cemented and vulcanized as well as 

 stitched it is claimed it will give additional mileage equal to 

 or greater than the 

 original tires. Two 

 discarded casings are 

 used, one with a good 

 foundation of fabric and 

 bead and the other with 

 a good rubber exterior 

 to be utilized as the 

 tread. After an incli 



as been trimmed from 

 its clincher edges, the 

 improvised tread is 

 placed outside of the 

 fabric foundation and 

 the two are firmly 

 stitched together by the 

 machine. Being laid in 

 a perfectly normal posi- 

 tion and supported by 

 the end of the machine 

 and two projecting roll- 

 ers, the casing and tread 

 cannot become distorted 



during the stitching 

 operations. 



As the casing and tread are moved forward at each stitch, the 

 needle and bobbin threads are passed through a lubricating 

 wax solution to insure a uniform and tight lock stitch. 



When repair patches are being sewed on tires, a lever at the 

 top of the machine can be depressed to cause a reversal of the 

 feed. The machine can be driven by either a one-horse power 

 motor or by belting. [Singer Sewing Machine Co., New York 

 City.] 



TRABUES LABEL GUMMING MACHINE. 



.■\ label gummi 

 manufacturers who 

 labels bv hand. L 



liavc lieen gumming 

 ttle attention lla^ be 



ng-felt want among 

 moistening dry gum 

 paid to the up-keep 



of the labeling department, but now that labor and materials are 

 high, a machine of this sort should be welcomed by the trade. 



These machines can be driven by hand or by small motors. 

 They are made entirely of brass, except the reservoir, and this 



