144 



THE INDIA RUBBER WORLD 



[December 1, 1918. 



much cheaper and gave satisfactory results so far as the trans- 

 ferring qualities are concerned. The only difference in results 

 between the cloth and paper transfers is that of removing the 

 stock after the tube comes from the vulcanizer. The cloth can 

 be readily stripped from the tube, while the paper sticks more or 

 less, according to the compound and the local conditions. Paper 

 labels can be printed with bronze or black ink. In either case 

 special ink and paper are used ; the former must not dry hard, 

 and the latter must not absorb the ink. It may be truthfully 

 said that paper perfectly satisfactory for some makers has not 

 been found to work under all conditions. 



Printing transfers is a specialty for other reasons than the 

 use of cloth, special paper and bronze or ink, as the type and 

 cuts must be the reverse of those used for regular printing, 

 except that of oflfset work, the imitation of lithograph, which 

 has practically superseded lithography. After the transfer 

 is printed the reverse of the regular way, it is placed on the 

 sheet of rubber, wrapped around the tube mandrel which is then 

 put in the vulcanizer and subjected to the curing heat. When 

 the tube is taken from the vulcanizer the ink or bronze has left 

 the cloth or paper and been transferred to the tube. (The Goshen 

 Printery, Goshen, Indiana.) 



MACHINERY PATENTS. 



A DUST-PROOF MIXER. 



"T^HIS machine embodies radical improvements in the mixer 



*■ described in The India Rubber World, July 1, 1917, such as 



a dust-proof hopper and a water-cooled feeding weight. 



This invention employs, as in the previous one, casing A en- 

 closing two parallel cylindrical cham- 

 bers B and C, in which rotary blades 

 D and E are mounted. The upper 

 chamber F is open to the lower cham- 

 bers. Casing G is provided with an 

 opening on one side communicating 

 with hopper H through which mate- 

 rial is fed. Chamber F and that por- 

 tion of the casing below the hopper- 

 opening form a neck, the cross-sec- 

 tional width of which is no greater 

 than the distance between the centers 

 of the blade axes. The length of the 

 neck is equal to or greater than I'A 

 times the diameter of the blades and 

 its cross-sectional area is more, and no 

 less than 1% times the areas of the 

 mixing chambers, excluding the space 

 occupied by the blades. 



The material is forced down by 

 weight / that is attached to the lower end of a piston-rod oper- 

 ating in cylinder /, and may be raised or lowered by any desired 

 power. Preferably the length of the neck, where it is enclosed 

 by four sides, should permit the weight to travel vertically a 

 distance equal to two or more times the diameter of the rotary 

 blades. By proportioning the neck to the size of the cylinders, 

 the operation of feeding and treating bulky material is greatly 

 facihtated. The hopper is provided with a cover consisting of a 

 wire frame covered with fabric which admits air but prevents 

 the escape of dust. (Fernley H. Banbury, Ansonia, Connecticut, 

 assignor to Birmingham Iron Foundry, Derby, Connecticut. 

 United States patent No. 1.279,220.) 



United States patent No. 1,279,824 issued to the same inventor 

 and assignor, covers an improved feeding chute, a blower for re- 

 moving accumulations from the weight, provision for the escape 

 of air and a rod for indicating the position of the weight. 



"Rubber Machinery," by Henry C. Pearson, should be in the 

 library of every progressive rubber man. 



Banbury Mixer. 



OTHER MACHINERY PATENTS. 



THE UNITED STATES. 



1,279,214. 

 1,279,337. 



l.j;s,y8U. Shaping dc 



The Goodyea 

 Tire Core. C. ] 



Massachusetts, assignor of one-half to 

 iston, Rhode Island, and one-fourth to 

 & Rubber Co., Akron, Ohio. 



Tire-making machine. W. B. Harsel, assignor to The Goodyear 

 Tire & Rubber Co.— both of Akron, Ohio. 



Woven Tire Co.. Trenton, Ncw 

 lary shuttle for tire-wrapping machine. H. I. Morris, San 

 Diego, California, assignor to The Dc Laski and Thropp Cir- 

 cular Woven Tire Co.. Trenton, New Jersey. 



Fabric-coating and calendering apparatus. F. E. Kip, Montclair, 

 and Edwin P. Ford. Morristown, assignors to The Duratex 

 Co., Newark — all in New Jersey. 



THE DOMINION OF CANADA. 



Collapsible tire-core. T. Midglev, Sr., Columbus, and T. Midg- 

 ley, Jr., Dayton, co-inventors, both in Ohio. U. S. A. 



Ball mold. The Canadian Consolidated Rubber Co., Limited, 

 Montreal, Quebec, Canada, assignee of H. Z. Cobb, Winches- 

 ter, Massachusetts, U. S. A. 



A. A. 



nd H. K. Wheelock, coinventors, 

 a, U. S. A. 



e vulcanizer. W. Reilly, Kerrisdale, British Columbia, Canada, 

 ■e-vulcanizing apparatus. The Doughty Tire Co., assignee of 

 H. J. Doughty— both of Providence, Rhode Island, U. S. A. 



THE FRENCH REPUBLIC. 



MISCELLANEOUS PATENTS. 



A FRENCH CUSHION WHEEL. 



■ I 'HIS invention covers a vehicle wheel with an annular cushion 

 ■*■ resembling an ordinary pneumatic tire, arranged between 

 the hub and the solid rubber tire of the wheel. A is the hub, 

 B the pneumatic cushion, and D the rim that supports the solid 

 tire F. Between the tread of the cushion B and the rim D 

 there is loosely placed a metallic ring C. The metal side-disks 

 G and C are fastened to the hub by bolts // and to the hollow 



Pneumatic Cushion Wheel. 



rim D by bolts H\ The resilient power necessary between the 

 disks G and G^ and the rim D is produced by springs K, the 

 ends of which are fixed to the rim and disks, respejtiveX'. 



When the wheel turns, the hub carrying the pneumatic cushion 

 and the disks revolves and transmits motion through thr springs 

 and the rim to the solid tire. (J. Gonzalo and R. de Dampierre. 

 French patent No. 486, 944.) 



