June 1, 1916.] 



THE INDIA RUBBER WORLD 



477 



New Tire Machines. 



MOLDING PNEUMATIC TIKES. 



TllK object 01 lliis machine is to compress the tread mold 

 against tlic tire core and draw the adjacent sides of the cas- 

 ing toward the beads. The side molds compress the casing 

 adjacent to the beads 

 against the tire core and 

 the edges are stretched 

 from the tread and in- 

 wardly toward each 

 other. Thus the fabric 

 plies are stretched, 

 smoothing d o w n all 

 wrinkles and uneven sur- 

 faces. 



The illustration on the 

 left shows a vertical sec- 

 tion of this machine in 

 operative position. Base 



A supports the upper cross head by heavy upright rods. The 

 table supports the core D and sectional tread mold E and nor- 

 mally rests on brackets F. 



The tire core is placed in the machine and pressure applied to 

 the ram C which acts on the levers, forcing the tread mold against 

 the tire. Then pressure is applied to the inner ram H, bringing 

 the table / in contact with the lower mold, when both tables 

 C and / are simultaneously raised, forcing the tire against the 

 upper mold by contact with the cross head as seen in the figure 

 on the right. The pressure from both cylinders is then released 

 and tire and core are removed for final curing. [Joseph H. 

 Coffey, Jr., and Joseph H. CofTey, Toronto, Canada, assignors 

 of one-half to Gutta Percha & Rubber, Limited, Toronto, Canada. 

 United States patent No. 1,179.898.] 



THROPPS TIRE BUILDING MACHINE. 



This apparatus is particularly adapted for use in connection 

 with .the tire making machine covered in United States patent 

 Xo. 1,119,326, granted to the same inventors, illustrated and 

 described in the January, 1915, is- 

 sue of The Indi.\ Rubber World. 



In the illustration, frame A sup- 

 ports the revolving tire core B 

 upon which the fabric strips are 

 applied. Frame D is attached to 

 the cylinder C that is adjusted 

 vertically by screw and bevel 

 gearing. Two stock rolls E, E, 

 that are journaled in this frame, 

 carry the friction fabric of differ- 

 ent widths used in constructing 

 the casing. The wooden rollers 

 F, guide the fabric to the re- 

 volving core, and tension is ap- 

 plied by weight levers G, C. The 

 liner strips are wound up on the 

 weighted rollers //, H, which are 

 driven by contact with the stock 

 rolls. 



In operation the plies of narrow 

 fabric are first laid on the core 

 and then the bead cores are applied, after which the wider fabric 

 is laid on while the core is revolved in the reverse direction. 

 Thus the threads of the fabric plies under the bead cores arc 

 laid at the same angles and those of the superposed plies arc 

 laid the same, but at a different angle to the plies under the bead 



m: 



cores. I IVier D. Thropp, John E. Thropp, Trenton, New Jersey, 

 and Albert de Laski, Weehawken, New Jersey, assignors to The 

 De Laski & Thropp Circular Woven Tire Co., Trenton, New 

 Jersey. United States patent No. 1,178,874.] 



INNER TUBE ROLLING MACHINE. 



In the manufacture of inner tubes, and for that matter hose 

 generally, sheets of vulcanized rubber are rolled around a 

 hollow mandrel, an operation requiring careful and experienced 

 hand labor. A machine 

 for doing this work is 

 the subject of the follow- 

 ing illustrated descrip- 

 tion. 



Referring to the draw- 

 ing, which is an eleva- 

 tion of one side of the machine A, parallel housings B are pro- 

 vided with vertically sliding heads C connected to the mandrel 

 rolling plate D. The vertical movement of this pressure plate is 

 controlled by rollers E, sliding over upper and lower tread flanges 

 F, F. 



The mandrel G and sheet of rubber stock are placed on the 

 table H and the screw threaded shafts / set in motion by the 

 belt driven gearing /, moving the pressure plate over the table 

 in contact with the mandrel, thereby rolling the sheet of stock 

 around it. The mandrel and tube are then placed in a similar 

 machine which performs the operation of cross wrapping in a like 

 manner. [Elmer S. Current, Beach City, Ohio. United States 

 patent No. 1.179,077.] 



TIRE BEAD TRIMMING MACHINE. 



Molded beads are substantially triangular in cross section and 

 the excess material on two of the edges known as "flash" must 

 be trimmed off to make them serviceable. This is usually per- 

 formed by hand, an op- 

 eration that is com- 

 paratively slow and one 

 that is not always pro- 

 ductive of uniform re- 

 sults. 



Midgley's machine 

 provides a base A on 

 which are mounted two 

 pairs of curved brackets 

 each other by set screws C, and sup- 

 each of which carries four curved 



£'/!^ Elevation 



B. adjustable to and from 

 porting two shafts D, D 

 cutter blades E, E. The bead guide block F, adjustable longitu- 

 dinally, is triangular in cross-section and supports the trough- 

 like bead support G. Stationary cutters H, H, vertically adjust- 

 able, are attached to the inclined sides of the guide block and a 

 bar / restricts the bead to longitudinal movement. 



In operation the cutter blades rotate toward each other with 

 a downward cut and e.xert a shearing action, in connection with 

 the stationary blades, on the bead as it passes through the ma- 

 chine, removing the "flash" in an effective manner. [Thomas 

 Midgley, Detroit, Michigan, assignor to Morgan & Wright, De- 

 troit, Michigan. United States patent No. 1,180,309.] 



METHOD AND APPLIANCES FOR BUILDING TIRE CASINGS. 



The principal feature in this invention consists in subjecting 

 the outer casing to an internal fluid pressure during vulcaniza- 

 tion. Another is an improved form of collapsible core, is illus- 

 trated herewith, that does not require sealing at the joints. 



