May 1. 1915] 



THE INDIA RUBBER WORLD 



441 



the spindli revolved. Tin- causes the toggle levers to open and 

 enlarge the opening in the rubber ring through which the cone 

 former forces the rubber bag or bottle, or whatever the article 

 may be. The spindle i- then reversed, the cone recedes, the 



toggle arms relax, and the rubber ring returns to its original 

 shape and closes the open end of the molded article. [R. Daescher, 

 British patent No. 7299.] 



Coleman' Coli lpsible Core. — Tin- invention provide- ametal 

 upon which the casing i- built in the usual way, and which 

 collapsed and removed from the tire casing. It is I 

 Of metal and cored to reduce the weight. It consists of a 



rounded rim that cone-pond- with the body of the casii 



reduced neck and a broadened base to support the beads. The 

 cori i- formed in four section- which an collapsed after the tire 

 i. formed, and withdrawn successfully through the inner opening 

 oi thi When thi - are assembled they are held 



in alignment In a removable annular ring which is channeled to 

 lit the Ranges of one side of the core. The inner circumference 

 of the core sections has taper - that fit the four wedge- 



ed blocks through which pass the locking bolts. These also 

 pass through angle plate- attached to the annular locking ring 

 and art- threaded and provided with hexagon nuts on their 

 outer end-. 



The core is assembled b} placing the locking ring on the - 

 sections with the wedge blocks within the recesses, which are 

 tightened bj rotation. After the tire has been formed the se- 

 curing plate and blocks are moved upwardly in the inclined re- 

 - until the bolts and blocks are opposite the outlet of the 

 rec( sses. Then the plates, blocks and ring are removed, which 

 leaves ample space for the withdrawal of the core by removing 

 one section at a time. [F. Coleman, United States patent No. 

 1,131,332.] 



CELL DRIER NINETY INCHES WIDE. 



THE biggest yet is always interesting. Several cell drying 

 machines have been made 10 cells high and 82 inches wide 

 for use by rubber companies in this country. But a drying ma- 

 chine was recently made at Taunton to be shipped abroad for 

 use in drying duck 84 inches wide, which is probably the largest 

 of these cell drying machines ever made. It consists of 10 cells 

 and is 90 inches wide. It occupies a floor space 63 inches by 100 

 inches and stands 100 inches high. The cell units will use steam 

 at 20 pounds pressure. It is built on the unit type, so that it can 

 be readily added to at any time if desired. The rollers are of 

 seamless drawn brass tubing, and oilless bearings are used 

 throughout. The drive is by roller chain and sprockets. 



On the drive side of the machine a removable steel housing is 

 provided, with an opening for attaching to the ventilating exhaust 

 line. By this arrangement, all moist air is drawn from each cell 

 across to the drive side, warm dry air taking its place. This adds 

 greatly to the efficiency of the machine, and permits drying thor- 

 oughly at higher speeds than could otherwise be done. 



Thi- huge machine was made by George A. Cutter, sales agent, 

 successor to Cell Drier Machine Co.. of Taunton, Massachusetts. 



The William R. Thropp & Sons Co., which manufactures ma- 

 chinery of all kinds for the rubber industry, has just added a 

 new erecting -hop, 60 x 160 feet, equipped with electric traveling 

 crane-, to its plant at Trenton, New Jersey. This company has 

 recently put on the market a new combination calender using an 

 electrii motor for raising and lowering the rolls and in which 

 all gears are protected by guards. 



A LARGE TRUCK TIRE PRESS. 



' | "HE accompanying illustration shows a truck tire press and 



* vulcanizer capable of exerting a total pressure on the tire 



mold- exceeding anything ever built before in this country. It 



leen found that i rdinary pressure would effectually op- 



erate against the pressun of the rubber in the molds. Presses 

 with ram- as 1. '-' inches in diameter and with 1,500 to 



1,800 pounds pressure have failed to do this work satisfactorily. 



This press is built for an initial water pressure of 3,500 pounds 

 per square inch ; it has a 24-inch ram and the total pressure on 

 tin molds is approximately 800 tons. This press has a vulcaniz- 

 ing tank, with a clear space for molds of 10 feet, and which has 

 been tested for a safe working pressure of 100 pounds per square 

 inch. The press is built almost entirely of -teel and weighs 

 98.000 pounds. With it there i- used an accumulator constructed 

 to maintain a pressure of 3.500 pounds per square inch. 



Both press and accumulator are the product of the Birming- 

 ham Iron Foundry, I nnecticut. 



Barney Oldfield, the veteran motor racer, established a new 

 non-stop record by winning the recent 300-mile automobile 

 race at Venice, California, without making a single stop. His 

 racer was equipped with Firestone tires. 



A tire repair and vulcanizing plant has been opened by the 

 Dunbar Tire Work- at 5406 Boulevard, North Bergen, Xew 

 Jersey. 



