416 



THE INDIA RUBBER WORLD 



[Sepi I mber i , 1901 





»-S 



^'•ge I^-»> •' 'Sir- s= *• -„-a« 



narily sent out to rubber manufacturers will handle a roll 2S to 

 30 inches in diameter and 13/2 feet long. The manufacturers, 

 however, have at their shops one that handles rolls 36 inches 

 in diameter, and 160 inches long. Numbers of rubber manu- 

 facturers in the line of mechanicals are equipped with these 

 machines, but it is the users of rubber covered rolls, the paper 

 manufacturers, who are the chief purchasers of them. In this 

 industry they are used not only for crowning the rubber rolls, 

 but also for brass rolls and for the chilled iron callender rolls. 

 [The Farrel Foundry and Machine Co., Ansonia, Connecticut.] 



THE "UMBRELLA TOP" SCREW PRESS. 

 In small mold work in rubber, where the screw press is used 

 KK " ' s often an advant- 



age for the workman to 

 be able to apply the 

 power on a line with 

 his chest and shoulders, 

 instead of reaching as 

 high or higher than his 

 head. It is far less fa- 

 tiguing to the operator 

 and a better leverage is 

 obtained. It was for ex- 

 actly these reasons that 

 the type of press here 

 shown was designed. 

 The hand wheel has 

 ample clearance, and if 

 greater leverage is de- 

 sired, its diameter may 

 be materially increased. 

 Indeed, the manufac- 

 turer is to-day supplying 

 them much larger than 

 on the press shown, 

 which is from a photo- 

 graph of the first one built, in which the " knock " principle is 

 made use of. [A. Adamson, Akron, Ohio.] 



PATENT MOLD AND VUI.CANIZER FOR SOLID TIRES. 

 The rubber solid tire, of whatever size or type, is as a rule 

 made in a long straight two part mold. In the process of cure 

 this mold is either put into a large steam press, or, the plates 

 being fastened together by some 30 bolts, it is placed in a vul- 

 canizer. The latter is the more common way and entails much 



work in the opening and closing of the vulcanizer head, the 

 handling of the hot bolts every half hour, and the swinging of 

 the heavy molds in and out of the curing chamber. To do 

 away with much of this detail, the mold vulcanizer illustrated 

 herewith has been produced. Described briefly, it is the usual 

 solid tire mold made with an upper and lower platen, except 

 that these platens are much thicker, and are 

 chambered to admit steam for the curing. The 

 upper platen has what are substantially square 

 chambers separated by baffle plates, in the alter- 

 nate ends of which are openings causing the 

 steam to zig-zag in its course through the platen 

 thus heating every part. In the lower platen 

 the steam chamber consists ol longitudinal 

 steam pipes separated by narrow septums which causes the 

 steam to circulate back and forth for even heating. Both up- 



- -—--— — ~ 



.'. 1 v r 



___±__ 



FIG. 2. 



per and lower platens are fitted with steam entrances and drips 

 and are also equipped with a patent clamping device by which 

 the whole mold is fastened at one motion in one minute. This 

 mold-vulcanizer is already in use in a number of rubber fac- 

 tories and is giving excellent satisfaction. United States pat- 

 ent No. 717,480. [The Wil- 

 liams Foundry and Ma- 

 chine Co.. Akron, Ohio.] 



FIG. 3. FIG. 4. 



Referring to the above illustrations, Fig. 1 relates to the upper 

 platen described in the text ; Fig. 2 to the lower platen ; Fig. 3 

 is a view of the mold-vulcanizer when closed, and Fig. 4 the 

 same when open. 



"TYRES" IN AN ENCYCLOPEDIA. 



THE latest edition of the " Encyclopaedia Britannica," the 

 world's greatest reference work, contains an article on 

 " Tyres," the spelling of which word shows that while the scope 

 of the work has been broadened by the addition of Americans 

 to the editorial staff, the British end still predominates. The 

 British quality of the work is further evidenced by the fact that 

 " tyres " are referred to and described as consisting of air tubes 

 and detachable covers, the details being illustrated fully, 

 while no illustration appears of the single tube type, of which 

 so many millions have been made in the United States — the 

 country in which more copies of the " Britannica " are sold than 

 in any other. America is recognized in this article, however, 

 through the inclusion of a cut of the Goodyear detachable dou- 

 ble tube tire, with a description of its characteristics — though 

 one is not told where this may be bought. 



