THE INDIA RUBBER WORLD 



635 



platen is supported on heavy steel rods and acts as the upper 

 frame of the press. 



The distance in the clear between platens when the lower one is 

 ■down is 14 inches, while between the rods it is 4SV4 inches. 

 .(The Wellman-Seaver-Morgan Co., Cleveland, Ohio.) 



walls of the battery-jar to be fully compacted and molded. 

 Steam is then turned into the interior of the vulcanizing cham- 

 ber and, circulating around the mold, vulcanizes the jar. (John 

 R. Gammeter, Akron, Ohio, assignor to The B. F. Goodrich Co., 

 New York City, United States patent No. 1,306,001.) 



HIGH-DUTY BELT-FASTENERS. 



The requirements of conveyor service, elevator belts and heavy 

 transmission duty at moderate speeds have been considered in 

 the design of this belt fastener. It gives an evently balanced joint 

 of exceptional ten- 

 sile strength, com- 

 bined with smooth- 

 ness on both sides. 



The squared ends 

 of the belt are but- 

 ted tightly together 



Fastener For He.-xvv Belts. ^"^ *^ '■f'J"'^^^ 



number of top 

 plates, with the round holes, are spaced evenly across the belt 

 with appro.ximately one-half inch between each plate, and the 

 bolt holes marked and punched one-sixteenth inch back from 

 the corresponding marked positions on the belt. 



The square-seated plates are placed on the pulley side and 

 the square-head bolts inserted in the holes, the round countersunk 

 plate being used on the reverse side to receive the special cone- 

 shaped nuts. 



After the parts are properly assembled the nuts are screwed 

 down tightly and evenly with a special socket wrench. After 

 a few days the nuts should again be tightened. The bolt ends 

 on conveyor belts should be cut off and the ends smoothed 

 down. (Flexible Steel Lacing Co., 522 South Clinton street, 

 Chicago, Illinois.) 



and Figure 2 is a sectional plan on the Hi 



MACHINERY PATENTS. 

 BATTERY-JAR PRESS-VULCANIZERS. 



THIS m.^chine exerts pressure simultaneously and in all direc- 

 tions upon the several faces of the battery-jar being molded, 

 which is afterwards cured in the same machine. Referring to 

 the illustrations. Fig. 1 

 is a vertical sectional 

 view. Fig. 2 is a hori- 

 zontal section on the line 

 2—2 of Fig. 1. Fig. 3 is 

 one of the battery jars 

 produced on this ma.- 

 chine. 



The operation is as 

 follows : the cover is 

 hoisted up and the cyl- 

 inder discharged so that 

 the ram and platen are 

 in their lowest position. 

 The mandrel is placed 

 upon the platen and the 

 sheets of unvulcanized 

 compound are assembled 

 upon the four sides and 

 Battery-Jar Molding and Vul- top of the mandrel to- 



CANiziNG Press. gether with the four side 



plates and the top plate of the outer mold. The bell-shaped 

 cover is then lowered and locked to the base. The waste pipe 

 of the cylinder is left open so that the piston may be pushed up 

 by the rising mold. 



Pressure is then turned into the cylinder and the platen with 

 the mold thereon is elevated, the result being that a heavy mold- 

 ing pressure is exerted, causing the edges, sides and bottom 



A TUBING MACHINE OF NEW DESIGN. 



A tubing machine of novel design is shown here, Figure 

 being a sectional elevation on the line 1-1 of Figure 2 

 2-2 of Figure 1. 

 The method of 

 operation is as 

 follows : 



The extrusion 

 rollers b and the 

 feed rollers ^are 

 revolved in the 

 directions indi- 

 cated by the ar- 

 rows in Figure 1. 

 The rubber 

 which it is de- 

 sired to extrude 

 is first formed 

 into strips of a 

 suitable width 

 and thickness to 

 i n t r o duce be- 

 tween the feed 

 rollers f. 



By means of 

 the adjusting 

 screw the feed 

 rollers are ad- 

 justed so as to 

 pass forward a 

 sufficient quan- 



A British Tuber. 



tity of material to fill entirely the spaces between the teeth ii' 

 of the rollers b. 



As the extrusion rollers revolve the material is carried 

 around the periphery of the rollers until it reaches the point 

 at which the teeth fc* interlock. 



The teeth are so shaped that the material is then forced out 

 of the spaces in a thoroughly masticated condition, and it is 

 thus deposited in and forced along the extrusion chamber and 

 through the extrusion opening between the core c' and the die 

 (f on to the cable which is drawn through the sleeve c' in tlie 

 ordinary way. (John Stratton of Bowden and Ernest Alexan- 

 der Claremont of High Legh, England. United States patent 

 No. 1,302,484.) 



RUBBER SHEET-FORMING AND CURING APPARATUS. 



Vulcanized rubber sheets are produced by pressure between 

 converging travelling metal belts which are progressively steam- 

 heated so that the temperature is increased until the vulcanization 

 point is reached near the delivery end of the bands. 



The belts 19, 20 are carried by vertically adjustable power- 

 driven rollers 9, 10 and by idler rollers 17, 18 capable of both 

 vertical and horizontal adjustment. Positively driven pressure- 

 rollers 13, 14 capable of horizontal adjustment are provided to 

 engage the belts. 



Below and above the belts 19, 20, respectively, are platens 

 4 and 6, divided into chambers which are supplied with steam 

 through pipes controlled by hand or pressure-operated valves. 

 Steam first enters the compartments a so that the temperature 

 increases from the point at which the rubber is delivered from 

 a vertically-adjustable spreader S to the delivery end of the 



