232 



THE INDIA RUBBER WORLD 



[Febeuarv 1, 1916. 



type of machine is made with special agitators adapted to tht- 

 various materials to be noixed, including the rubber cements 

 used by manufacturers of rubber goods. 



The gearing on the mixer is made to suit any class of ma- 

 terial, from the lightest li(iuid pastes to the heaviest cements that 

 can be drawn off through a 6 or 8-inch opening. As shown in 

 the illustration the mixer is provided with a tight and a loose 

 pulley for belt drive. |.|. 11. Day & Co., Cincinnati, Ohio.] 



ELECTRIC CLOTH CUTTER. 



For cutting up many plies of materials sucli as cotton goods 

 used in the manufacture of rubber clothing, the power driven 

 cloth cutter is a necessary and 

 indispensable part of the fac- 

 tory equipment. 



The vertical blade machine 

 shown in the illustration 

 posseses many excellent fea- 

 tures in construction and is 

 claimed to have successfully 

 withstood the most rigorous 

 tests in many rubber clothing 

 factories. The foot or stand- 

 ard which supports the ma- 

 chine is made interchangeable 

 to any desired size ; that is, 

 the machine can be equipped 

 with a very narrow standard 

 for cutting sharp curves, as in 

 collars, cuffs, neckbands, belts, pocket flaps, etc. 



The vertical knife is reciprocated by a powerful air cooled mo- 

 tor from either direct or aUernating current, and the weight is 

 so placed that perfect balance and ease of manipulation is ob- 

 tained. The blade can be readily removed at the front of the 

 machine and the presser foot; is easily adjusted to the work, 

 requiring no readjustment when sharpening the blades. 



A novel feature is the shaded electric light that illuminates the 

 work, thereby greatly aiding the operator in accurate cutting. 

 The switch, of an approved type, is controlled from the handle, 

 and the base is provided with ball bearing rollers that reduce 

 the friction in passing over the goods to a minimum, thereby 

 insuring facility and accuracy in operation. 



The Universal cutter is made in sizes that will cut lays from 

 3 to 6 inches high and is guaranteed by the makers against me- 

 chanical or electrical imperfection for one year. [Universal 

 Cutter Co., St. Louis, Missouri.] 



knife or doctor. This coating material is dried as the coated 

 fabric passes through the drying chamber and the vapors of 

 the volatile solvent released in this drying operation are 

 drawn of? by a pump and recovered in a condenser. As 

 this operation is carried on in a vacuum, the solvent is 

 evaporated at a comparatively low temperature and the dry- 

 ing is effected quickly and thoroughly, preventing the escape 

 of the vaporized solvent, fj. P. Devine, L'nited States patent 

 No. 1,164.174.1 



HEATED FORM FOR DIPPED GOODS. 



To obviate the necessity of drying by exposing the dipped 

 form to the air after each dipping operation, Williams has 

 invented a form, heated on the interior, to cause the solvent 

 to evaporate rapidly from the coat of material on the fgrm. 

 The present invention provides for uniform 

 heat throughout the form and a reduction of 

 I the time necessary for drying. 



"" The drawing shows a hollow glove form A 



I U U r\ '"^''^ °^ bronze. At the wrist portion is a 

 closure B with an opening C, through which 

 is poured the volatile liquid D. Tube £ is 

 threaded at its open end and heat is trans- 

 mitted to tlie liquid by this tube and the in- 

 ner i)ipe F, which is connected to the supply 

 pipe c;. 



In practice the form is inverted and filled 

 about two-thirds full with liquid, w^hich is pref- 

 .erably gasolene. When still in this position, 

 the form is heated in any suitable manner un- 

 til the liquid boils freely and vapor passes oflf 

 through the' opening. The opening is sealed 

 while the liquid is still boiling so that only the vapor and 

 the liquid itself exist inside the form. Then the form is 

 attached to the pipe from the heating source and a uniform 

 heat throughout will result and be maintained during the 

 dipping, operation by the washing back and forth of the 

 liquid. [Carl S. Williams, assignor to Revere Rubber Co., 



MACHINERY PATENTS. 



DEVINE'S SPREADING MACHINE, 



IN this machine for proofing fabrics the spreading and drying 

 operations and the recovery of the volatile solvents are 

 conducted in a closed chamber under a partial vacuum. 



Referring to the diagram, a longitudinal cross-section view. 

 A represents t h c 

 ^ vacuum drying 



chamber, B open- 

 ings for the pipes 

 eading to the con- 

 denser and air 

 pump, C delivery 

 drum, D receiving 

 drum, £ a removable front plate for introducing the fabric 

 and F a back plate for removing the roll of proofed fabric. 

 The other main parts include the feed hopper G, the spread- 

 ing knife H, the heating table / and the fabric K. 



In operation the coating material flows from the feed 

 hopper upon the fabric and is spread as it passes under the 



i^b 



United States patent No. 1.163,053.' 



ELECTRIC TIRE MOLD. 



By the use of a mobile material as soapstone or sand in- 

 stead of the tire core and the usual two-part mold or cloth 

 wrapping. Price claims to overcome many of the present 

 difficulties in curing tires. To accurately shape beads it is 

 necessary that they 

 ty^"»»^|y/.{a ^ should be clamped and 

 ^^ to prevent sagging of 

 the tread it should 

 be supported, especially 

 during the initial vul- 

 canizing heat. 



Referring to the 

 drawing, the beads A 

 are clamped in the 

 plates B, to the lower one of which is attached a box-like 

 structure C inclosing the tread D. The soapstone, sand or 

 mica E surrounds and incloses the tread completely as shown. 

 If pressure is to be exerted in the box, cover F is bolted 

 down and the shoe thus arranged is ready for vulcanization 

 which is accomplished by means of the electric resistance 

 coils G and steam or electric coils in plates B. 



In a modification of the above a hollow metal core is used 

 instead of the soapstone or like substance, in which either 

 steam or electric coils are the vulcanization agents. [R. B. 

 Price, assignor to Rubber Regenerating Co., United States 

 patent No. 1.162,397.] 



