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THE INDIA RUBBER WORLD 



[July 1, 1914. 



New Machines and Appliances. 



COBB'S MACHINE FOR COATING WOVEN HOSE. 



THE latest apparatus to be invented by Henry Z. Cobb, 

 who has contributed so widely to the machines employed 

 in rubber factories, and more especially to hose machin- 

 ery, is a device for applying friction dough to hose directly 

 above the braiding point. In this apparatus the rubber com- 

 pound is applied so that the converging threads from the 

 braiding machine enter the lower end of the coating cham- 



movcnicnt tends to keep the dough in the cylinder and pre- 

 vent it from falling through between the threads. The dough, 

 however, gravitates sufficiently to pass down and cover the 

 threads before they are braided around the hose. 



The speed of the conveyor may be regulated so that 

 enough dough is kept in the cylinder to maintain the lower 

 surface of the dough just in contact with the threads as shown in 

 the drawings. After being braided on the hose, the newly formed 

 web passes up through the rubber and becomes thoroughly im- 

 pregnated. The surplus dough is wiped 

 off from the hose bj' a die .V at the upper 

 __ end of the cylinder. Tlie modified form 



C of the coating cylinder has a die R 

 at the lower end and with this form of 

 cylinder the thread is braided over the 

 hose before passing into the friction 

 dough. Otherwise, this form of cylinder 

 is the same as the other. [U. S. Patent 

 1,094,879, April 28, 1914, Henry Z. Cobb, 

 Winchester, Massachusetts.] 



A DECORTICATOR FOR LANDOL- 

 PHIA. 



D 



Cobb's Hose Covering Apparatus. 



ber where they come into contact with the rubber. In this 

 respect the machine differs from a former apparatus of Mr. 

 Cobb's in which the hose was passed through the coating 

 cylinder before the covering was braided on. The new ap- 

 paratus has the advantage of passing the newly formed 

 braided web through the plastic material so that the rubber 

 penetrates the meshes of the woven cover. 



Referring to the drawings herewith, A 



represents part of a braiding machine with 

 the addition of the coating cylinder, con- 

 veyor and mixing cylinder. B represents 

 an enlarged section of the coating cylin- 

 der, while C shows the cylinder in modi- 

 fied construction. Referring to the first 

 of these drawings, the friction dough is 

 placed in a cylinder D, in which it is kept 

 stirred up by agitator blades E. The shaft 

 of these stirring blades is revolved by a 

 chain F passing over a sprocket on the 

 end of the shaft and obtaining its motion 

 from some convenient part of the braid- 

 ing mechanism. The opposite end of the 

 shaft carries another sprocket which ac- 

 tuates the chain G, this chain revolving a 

 screw conveyor H in the cylinder /. This 

 conveyor forces the dough into the coating cylinder /, which 

 is open at its lower end. The threads K from bobbins L of 

 the braiding machine converge at the lower end of the coat- 

 ing cylinder where they are braided on the core or hose lining 

 M. As the threads are in constant motion their upward 



ECORTICATING machines of va- 

 rious types have been designed in the 

 past for crushing vines for the subse- 

 quent removal of the gum. The two draw- 

 ings in Figs. 1 and 2 herewith show re- 

 spectively a side elevation and a cross 

 section of a Laiidolpltia vine decorticator 

 designed and recently patented by J. L. 

 Palmer, of London, England. 

 The machine comprises a frame A in 

 which are journaled a number of fluted rollers B, forming a 

 traveling bed. Each roller carries a worm gear C, engaging 

 a worm shaft D, by means of which all of the rollers may be 

 rotated simultaneously in the same direction. Above the 

 rollers B are two wheels, each made up of four rows of 

 steel rods E, which act as hammers. The hammers are loose- 



FiG. 1. 

 Palmer's Landolphl\ Decorticating Machine. 



ly pivoted in the hubs F. Their outer ends are toothed or 

 grooved, and when in motion they just clear the bed of 

 rollers B. The main shaft G is rotated at high speed, the 

 centrifugal force of the revolving hammers keeping them ex- 

 tended. The vines are fed into the machine over the traveling 



