M ri ii 1, 1915. 



THE INDIA RUBBER WORLD 



331 



New Machines and Appliances. 



COAGULATING LATEX. FABRIC IMPREGNATING MACHINE. 



Rl BBER latex is smoke cured bj repeatedlj performing the 

 following operations: Pouring latex on the external surface 



/) of a drum to give a complete but thin coating thereto; 

 rotating the drum to distribute the latex evenly, and thereafter 

 subjecting the coated drum, while rotating it, to the action 

 smoke. The drum may also be smoked previous to being 

 d with latex, and after coagulation the outer surface may 

 be smoothed by rolling upon a board. In the form shown, the 

 Ranged aluminum drum is built of readily separable parts, 

 namely, a sheet /> with inturned ends clamped to a distance- 

 piece, thus forming a Y-shaped groove for the knife used for 

 removing the sheet, and end plates /»'. Surplus latex, caught 

 in a pivoted receiver ./ ma\ be poured into a dish ./ lifted 



C'ABRIC is sometimes impregnated with rubber solution be- 

 *■ fore being proofed In the apparatus illustrated, fabric 

 i 1 I es over an adjustable roller (4) and a fixed roll (S) 



to the usual spreading machine (3). Between the rollers (4, 5) 

 is a doctor (6), winch depresses the fabric into a pocket (9) 



in which rubber solution (10) is placed. The rubber solution 



with a strainer A'. The film of latex is coagulated over a 

 smoke-producing apparatus B. [F. Ripeau, British patent. No. 

 21,771.] 



ATTACHING SOLES BY VULCANIZING. 



HP HE sole is vulcanized to the shoe by the heat and pressure 

 * of a flexible metal surface. In the illustration the figure 

 on the left shows a longitudinal section and that on the right 

 a cross section. The metal surface is composed of a series of 

 chains placed one beside the other and held at both ends by 

 perpendicular screws b. which project through a common head- 



pi - c. These screws are adjusted vertically by nuts d. The 

 last, with the shoe and sole, is placed under pressure block g. 

 The sole rests on a gauze packing , . laid over the chains to 

 distribute the pressure and prevent cutting the sole. The 

 screws b are then adjusted, pressing the chains tightly against 

 the soh-s. Pressure block g, adjusted by the hand screw h, 

 holds the shoe in place. Chamber i is heated by a gas burner 

 or by placing the apparatus on a stove. [F. A. Antoni, German 

 patent, D. R. P.. No. 280.763.] 



is prevented from running oul at the sides bj guards (14), 

 carrying pivoted angle-plates (11), which are adjusted to sup- 

 port the edj the fabric \ plain or ribbed roller may be 



placed in the pocl to beai upon the fabric and open the 



interstices. \\\ \ Higham, British patent, No. 20.471.] 



HEATING OR COOLING MIXER ROLLS. 



""PHIS invention relates to rolls for mixing rubber. A cast- 

 •*■ ing a is formed with surface grooves c covered by a thin 

 shell e for the circulation of heating or cooling fluid. It also 



M 



k& 



®c? c d ed 



pinp^ 



has one or more pairs of helical grooves c, d, whereby fluid 

 can be circulated from both ends of the cylinder; also the 

 bearings b' have coils b" for the circulation oi heating or cool- 

 ing thud. Fluid is supplied through a pipe h. whence it flows 

 through a central cavity g and ports c\ d', into the grooves c, 

 </. and passes away through outlets c~, d~. into a pipi 

 leading to an outlet /. The fluid may be supplied from either 

 ii both ends of the cylinder. [C. H. Gray. British patent, No. 

 21,001.] 



STRIP-CUTTING DEVICE. 



C I KIPS of rubber or rubber compounds, used in the manu- 

 *-* facture of tires, are cut on a calender or warming mill by 

 a series of disc knives (1), adapted to engage the materia! as it 

 r a roll (3). Each knife (1) is carried by an arm 

 (9) adjustably mounted on a shaft (2), journaled in beai 

 (4) which permit of a ready removal of the shaft. The arm 

 (9) loosely engages the shaft (2), and is connected by a spring 



