4' 'i i 



THE INDIA RUBBER WORLD 



[June 1. 1915. 



New Tire Machines. 



R\T inventions pertaining to rubber tire manufacture 

 have been both numerous and interesting. The following 

 chines are evidence that unusual inventive skill is being 

 istently directed along the lines of increased efficiency. For 

 instance, the Subers machine improves on th< cord laying idea 

 iti matically turning out tire castings in continuous lengths 

 "mother interesting tire building machine performs a variety of 

 tions that formerly were thought to be • manual, 



pp-de Laski tire-building machine was invented and is 

 built li> practical rubber machinists, 'lire he. id cores are 

 made from the roll of frictioned fabric by Stevens' latest ma- 

 chine, (.ammeter makes the CO in a tuber, then covers it 

 and Forms the finished head, while Thropp provides a ring tem- 

 plate for centering the finished head on the casing. Non-skid 

 pneumatic treads are now made in molds and cured in the press 

 with one operation, according to Sloper's British patent, while 

 '- United State, patent provides a mold for the same 

 purpose. ["here are many other inventions of interest relating 

 to tire manufacture, such as a tension device, impregnating ma- 

 chine, solid tire machine, several collapsible cores, etc. descrip- 

 tions of which follow. 



SUBERS' TIRE CASING MACHINE. 



Till:: patents granted recently to Lawrence A. Subers relate 

 to annular and tubular tire fabrics previously impregnated 

 Mth rubber solution and made on an endless mandrel, 

 which corresponds in cross-section with the finished casing. 

 Later patents provide for a ribbon of metal inserted in a tubular 



hand, saturated with rubber solution, and made, on a special ma- 

 chine, into a tubular or sheet fabric of single thickness with raw 

 edge, or 'He of double thickness with selvage edges, for hose, 

 tires or belting. 



Tile illlustration refers to one of the former patents covering 

 a machine for making annular tubular fabric on a curved man- 

 drel. The three standards ./ support the frami of the machine and 

 an endless mandrel B that travels on a Trail C driven by 

 lit wheel /' from the main shaft E. The hearings F sup- 

 port the four reels (.,' and // and the s| K /, on which the ad- 

 hesive fabric bands are wound alternately, with non-adhesive 

 -trips from the spools /. The fabric hands K mounted on the 

 I ing nc!s are guided to the right hand side of the machine, 

 where roll, id< thi strips over the slowly moving mandrel 

 ing the tube .1/. which is slit on its inner surface by the cir- 

 cular knife .V. [L. A. Subers, United States patent, Xo. 1,132,- 

 635.1 



STEVENS' BEAD FABRIC TEARING DEVICE. 

 The preliminary tearing device is not shown here, as this is 

 mounted on a frame in line with and on the right of the ma- 

 chine illustrated, which is the final tearing device. The pre 

 liminary device consists of clamps that firmlj grip the front 



A — Side Frames. B — Fabric Roll. C — Liner Roll. D — Frictioned Fabric. 

 E — Upper Tearing Roller. F — Lower Tearing Roller. G — Torn Strips. 

 H — Forming Die. I — Bead Forming Sheave. / — Bead Spools. 



edge of the cloth and ate as wide as the strips into which the 

 frictioned fabric is to he torn. The alternate clamps hold the 

 fabric stationary, while the intermediate clamps are fixed to a 

 movable bar which accomplishes the preliminary tearing when 

 moved backward by the operator. The lever carrying the upper 

 and lower tearing rollers is then swung in place, as will 

 be seen in the illustration. The torn strips are released from 

 the alternate clamps and passed around the lower tearing roller, 

 while those from the intermediate clamps are passed over the 

 upper tearing roller and are then united in sufficient number to 

 form beads. When the machine is started the tearing action is 

 continuous, and the heads are passed through the forming dies 

 and the bead forming sheaves to the spools. [W. C. Stevens, 

 assignor to the Firestone Tire & Rubber Co., United States 

 patent, N'o. 1,134,293.] 



PNEUMATIC TIRE MAKING MACHINE. 



Clincher and quick detachable tire casings are made on this 

 machine, which winds the fabric, applies the beads and practi- 

 cally finishes the casing mechanically instead of by hand, as is at 

 present customary. 



In making a tire the fabric strip is led from the supply roll 

 and its end applied to the surface of the core. This is then 



A— Side Frame-. /)' Fabric Roll Shaft. C — Fabric Roll. D — Frictioned 

 Fabric. E— Liner Roll. F— Core Shaft. G— Chuck. H— Tire Con 

 / — Presser Rollers. ) Presser lever. K — Lever Adjustment. L — Read 

 Applying Device. M — Bead Forming Device. 7*/— Trimming Device. 

 — Saddle Adjustment. P— Vertical Stands (2). Q — Eccentric Rollers. 

 R — Roller Hand Levi 



rotated and spaders are applied by hand to the fabric strip, 

 pressing it closely against the under side of the core. 



In some cases the tension on the fabric 'trip is relied upon, 

 while in others presser rollers are employed, to press the fabric 



