i40 



THE INDIA RUBBER WORLD 



[.Id 



roll C is hollow and connected to pipes E and F through which 

 the heating or cooling medium is conducted. It revolves in 

 bearings supported in the ends of the casing and is driven by a 

 spur gear D. .\ multiplicity of hollow pins G extend within 

 the casing and are connected to the vacuum pipes H. 



As the roll rotates, the rubber stock will be kneaded between 

 the corrugated roll and the inner sides of the casing; mean- 

 while the hollow pins will penetrate the mass and the gases and 

 fluids withdrawn from the material by action of the vacuum. 

 I Raymond B. Price, Xew York City, assignor to Rubber Re- 

 generating Co., a corporation of Indiana. United States patent 

 Xo. 1,184,016.] 



ROYLES TUBING MACHINE HEAD. 



Tubing machines are at times subjected to excessive strain 

 due to overcrowding the capacity for which the machine is 

 designed. Royle's invention precludes this danger, whether the 

 _^___^___ machine is used for multiple 



tube forming or straining re- 

 claimed rubber, by providing 

 a plurality of discharge open- 

 ings in the head. 



Referring to the drawings, 

 ,-; represents the tubing ma- 

 chine cylinder, and S the 

 stock worm. £ is the strainer 

 head and D, E, and F the 

 hollow nuts that screw into 

 the discharge openings and 

 hold in place the strainer 

 plate, or die and core bridge, 

 as the case may be.'. The op- 

 posite sides of "the head be- 

 tween the discharge openings 

 are covered by plates G and 

 H, forming chambers / and /, 

 in which circulates either a 

 heating or cooling medium. 

 The annular chamber K sur- 

 rounds the front discharge opening for the same purpose. 



The construction of the head permits the stock worm to be 

 used at full capacity without danger of overcrowding, since the 

 material will find an outlet through the lateral passages when 

 the forward discharge passage is overloaded. [Vernon Royle. 

 Paterson, New Jersey. United States patent No. 1,182,711.] 



HOPEWELL'S ENCLOSED SPREADER. 



This machine proofs and dries the fabric within an enclosed 

 chamber from which the volatile vapors are conveyed to a 

 separate apparatus where the solvent is recovered. The plates 

 _ designated by A in the 



illustration enclose the 

 revolving steam - heated 

 cylinders B and C. Sup- 

 plemental heat is fur- 

 nished by the sectional 

 steam plates D, E and A'. 

 The spreading mechan- 

 3ide aevation fJection) ism is bolted to the frame 



at F and comprises a transverse chamber in which a scraper 

 travels back and forth automatically, cleaning the back of the 

 hinged spreading knife G that is raised by hand levers H. The 

 chamber / is provided with a fabric slot opening into the dryer 

 and extending the entire width of the machine. 



A metal fabric supporting strip closes the bottom of this cham- 

 ber and passes around a transverse roller that is raised or low- 

 ered to adjust the distance between the fabric and spreading knife. 

 The dough is spread on the fabric / in front of the knife and 

 seals the opening through which the web passes into the vaporiz- 



^3 



Verticcl Section - Plane ofA-A 



ing chamber. Revolving knives remove foreign particles and 

 imperfections and the coated and cleaned fabric passes around 

 heated drum C, over water-cooled roller L and around drum B, 

 passing out through opening M, sealed by felt-covered rollers. 

 The volatile vapors are conveyed to a brine-cooled solvent con- 

 denser of the usual coil type where the solvent is recovered. 

 ] Charles F. Hopewell, Newton, Massachusetts. United States 

 patent No. 1,184,452.] 



A NEW OPEN CURE TIRE MOLD. 



The principal object of this invention is to avoid the wrapping 

 process customary in open cure tire vulcanizing. In place of 

 the usual strips of cotton cloth that are wound around the mold 

 and tire, a fabric diaphragm is 

 clamped securely on both sides of 

 the tire, furming a flexible support, 

 covering the casing and tread. 



In the cross-section illustrated, 

 A is the tire core, S the tire casing 

 and C, C the two bead rings. D, D 

 are the two rings that hold in place 

 the low;er edges of the flexible 

 diaphragms E and F, composed of 

 canvas or rubberized cloth, while 

 the upper edges are held by two 

 rings. G and H. Bolts / clamp the 

 r inner parts together, and clamps / 

 hold the outer sections in place. 

 The mold is then placed in the heat- 

 er and the tire cured by the open 

 cure process. [William A. Robbing, 

 Glen Ridge, New Jersey. United 

 States patent No. 1,184,774.] 



APPLYING HARD COMPOUND TO SOLID TIRE RIMS. 



This machine receives the hard rubber compound from a strip 

 forming calender and lays it evenly on the metal base or rim, 

 forcing it into the grooves provided for anchoring purposes. 



In the illustration, ^ is a 

 calender and B the rim 

 chuck that revolves on a 

 stud attached to an arm C 

 provided with a counter- 

 weight D. This arm is 

 pivoted to a shaft that is 

 journaled in bearings at- 

 tached to the calender 

 frames. 



Below the rim, drums E 

 and F are mounted and 

 carry a wire belt or a series of wire belts G, driven by sprocket 

 gearing and chain // from the calender. 



The rim is then placed upon the machine feeding the compound 

 to be used' for the base of the tire and put in operation. The 

 strip of compound passes between the rolls and upon the travel- 

 ing belt which rolls it upon the rim while still warm and tacky, 

 causing the latter to revolve through frictional contact. When 

 the rubber on the rim is of sufficient thickness, it is removed 

 and placed upon the second machine, which applies the com- 

 pound for forming the outer pa'rt_ of the tire. In making tires 

 according to this invention, a number of calendering machines 

 are provided, having attached thereto the apparatus described, 

 one complete machine being provided for each of the difi'erent 

 compounds to be incorporated in the tire. After enough of 

 this has been rolled upon the rim, the rim and tire are placed 

 in a mold and vulcanized by heat and pressure. [John J. Gam- 

 meter and Walter H. Allen, Akron, Ohio, assignors to The B. F. 

 Goodrich Co., New York City. United States patent No. 1,183,552.] 



