March 1. 1916.) 



THE INDIA RUBBER WORLD 



293 



By suitable connections and valves, pipe H may also be used to 

 cause condensation of the volatile gases so that they may be re- 

 covered. A repetition of these operations will give the article on 

 the forms the required thickness, after which heat may be intro- 

 duced through pipe H for vulcanizing. [R. B. Price, assignor to 

 Rubl)er Regenerating Co., N'augatuck, Connecticut, United States 

 l.atcnt Xo. 1,169,733.) 



TIRE FLAP MAKING MACHINE. 



A simple and efficient apparatus for the manufacture of tire 

 flaps is shown in the accompanying illustration. 



The motor A rotates the fabric supply spools B, C, D, E, F, 

 C and H by pulley /, sprocket ./ and chain drive to each spool. 

 Upon the supply spool B is wound a strip of fabric K of a width 



cfTresponding to the greatest width of the flap to be produced. 

 and upon the supply spools C. D, E, F and G are wound strips 

 of fabric decreasing in width while spool H carries a strip slightly 

 less in width than the bottom layer A.' of the tinished flap. 



Fabric from roll B with the strip from roll C are introduced 

 between the first feed roll L and its pressure roll, not shown, 

 whereby the two are brought into intimate pressure contact. This 

 process is continued at each spool until the resultant stock passes 

 through tension rolls to guide .1/. As the fabric passes through 

 the guide it is drawn into the cupping drum N and because of the 

 concave shape of the bottom of the drum, will assume the de- 

 sired transverse curvature which is fixed by curing. [W. C. 

 Stevens, assignor to the Firestone Tire & Rubber Co., Akron, 

 Ohio, United States patent No. 1,169,204.] 



AUTOMATIC MIXING MILL. 



Hoyt's mixer is designed to do away with considerable 

 hand labor and also the necessity of an adjustable apron 

 for collecting and returning to the rolls the ingredients thai 

 are not at tirst caught up by the rubber. The material that 



falls to the bot- 

 t o m of the 

 chamber is 

 scooped up by 

 revolving blades 

 and carried 

 around so that 

 it drops upon 

 the mass being 

 mixed. .\ fur- 

 ther object is to 

 subject the 

 plastic material 

 to a vacuum 

 pressure during 

 the mixing 

 process. 



The illustra- 

 tion is a cross- 

 sectional view 

 showing the arrangement of the various parts. The powdered 

 compounding ingredients are put into feed hopper ./, which 

 is mounted on the cylindrical casing forming the main cham- 

 ber B. A bladed shaft C then forces the material into the 



main chamber at a definite rate. The mixing rolls D are 

 hollow and are provided with suitable connections for the 

 inlet and outlet of steam and are revolved at slightly different 

 speeds to give a grinding or kneading action to the material 

 as it passes through. The doors E, which are hermetically 

 closed, permit access to the interior of the casing and also 

 permit inspection of the contents by means of the glass win- 

 dows F. The device for conveying the material from the 

 lower to the upper side of the rolls consists of two annular 

 gears G, connected by rods to which are attached the paddles 

 H. As the gears are rotated in a counter-clockwise direction 

 the material is scooped up from the bottom, carried up on 

 the right side of the chamber and then dropped to the rolls 

 when the paddle has reached a position directly under the 

 feed hopper. [Homer J. Hoyt, assignor to Morgan & Wright, 

 United States patent No. 1,163,089.] 



OTHER MACHINERY PATENTS. 



THE UNITED STATES. 

 ISSUED JANUARY 25, 1916. 



H. Wiggins, assig. 



Electric car vulcanizer. E. 



Heyman — both of Chicago, I 

 Portable repair vulcanizer. C, 



170,423. 

 170,424. 



Shaler, Waupiin, Wis. 

 ISSUED FEBRUARY I, 1916. 

 Hee! cutting apparatus. W. J. Nesbitt, Los Angeles, Cal. 

 Spreading machine for coating fabric with rubber or other 



plastic materials. A. Wood, U.xbridge, England. 

 Collapsible core. W. R. Denman, assignor to Miller Ki: 



Co.— both of Akron, Ohio. 

 Collapsible core. W. R. Denn 



Co.— both of Akr. 



Ohio. 



assignor 



Mille 





ISSUED FEBRUARY 8, 1916. 

 170,520. Cement! 



ford, 



son, N. J. 

 170,600. Apparatus for the vulcanization of pneum 



skid leather treads. M. Bergougnan, Paris, assignor to Societe 



("lenerale Jes Etablissements Bergougnan, Clermont-Ferrand 



both in France. 

 170,612. Solid tire remover and replacer. H. A. Coverv, assignor of 



one-half to F. C. Eberly— both of Akron, Ohio.' 

 171,038. Repair vulcanizer. T. D. Card, Kokomo, Ind. 

 171,143. Rotary drier. W. B. Ruggles, Bayonne, N. J. 



THE DOMINION OF CANADA. 



ISSUED NO\'EMBER 30, 1915. 



165,949. Fluid pressure mold with sheet of rubber. E. Lanhoffer, Poissy, 



Seine et Oise, France. 

 166,106. Slitting and rewinding machine. The Cameron Machine Co., 

 assignee of J. A. Cameron and G. B. Birch— all of Brooklyn, 



166,266. Tire vulcanizer press. Goodvear Tire & Rubber Co., as-signee 



of E. Nail— both of Akron", Ohio. 

 166,396. Mixer mechanism. P. E. Weltcn, Cuyahoga Falls, Ohio. 



THE TTNITED KINGDOM. 

 ISSUED J.^NUARY 12, 1916. 

 14). Insulated wire impregnating machine. W. Teggin, 7 Wood- 

 bine street. Moss Side, Manchester, and London Electric 

 Wire Co., and Smiths Limited — both of 7 Playhouse 

 Yard, Golden Lane, London. 

 ISSUED T-\NUARY 19, 1916. 

 141. Method of attaching covers to tennis or like rubber balls. 

 E. C. Wisden-Luff. and Wisden Co.— both of 23 Cran- 

 bourn street, London. 



THE FRENCH REPUBLIC. 



PATENTS ISSUED (With Dates of Application). 



77,474 (June 17, 1914). Hydraulic press for vulcanizing pneumatic tire 



r tires and other 



iings. A. Wolber. 

 ■7,699 (February 13. 1915). Vulcanizer for rejiairing tires 



rubber goods. W. H. Melas. 

 77,719 (February 19. 1915). Improvements in iiriic<'v>-es anrl a 



rubberizing fabrics F. A. Seiberling. 



NEW MANUFACTURING PROCESS. 



THE UNITaO STATES. 

 ISSUED FEl'.Rr.\RY I. I"l(, 

 170.154. Process of making lire casings. II. lUiinig. Akr< 



for 



