•77 



THE INDIA RUBBER WORLD 



[September 1. 1917. 



MACHINERY PATENTS. 



DEAD WEIGHT MOLD FSESS VUXCANIZEH. 



TO avoid the possibility of excessive pressure in mold curing and 

 the consequent damage to the molds is the principal object 

 of the invention here illustrated. The machine is shown in ver- 

 tical section witli a few 



molds in position be- 

 tween the platens. Two 

 standards A A rigidly 

 support the bottom platen 

 B, while the movable up- 

 per platen C is raised 

 and lowered by two ver- 

 tical screws D D, geared 

 by miter gearing to the 

 shaft E, driven by motor 

 F, both platens being 



chambered for steam. The end lugs of the upper platen are 

 provided with square holes and loosely fitted to the square brass 

 nuts that are threaded on the vertical screws. The bottoms of 

 the nuts are flanged to engage the under sides of the lugs. 



To raise the upper platen the belt-crank lever G is pulled 

 down, starting the motor, the brass nuts are advanced by the 

 revolving vertical screws and the flanges of the nuts engage the 

 lugs, thereby raising the platen. Connected to the lever G is a 

 sliding rod H, provided with two stops, the purpose of which, 

 briefly stated, is as follows: When the platen is free from the 

 molds the upper stop contacts with a projection on the lug, 

 thereby raising the starting lever and stopping the motor. When 

 the starting lever is raised the motor reverses and the platen 

 is lowered until it rests on the molds. By this time the lug pro- 

 jection has come in contact with the lower stop, thereby lower- 

 ing the starting lever and stopping the motor. Thus it will be 

 seen that the platen rests on the molds with its own weight, the 

 molds being all of the same thickness and the platen of sufficient 

 weight to afford the required pressure. [Christian Hamilton 

 Grey, Essex, England. United States patent No, 1,234.330.[ 



Referring; to the 



RtTBBER SOLE VULCANIZINS AND EMB0SS1N3 APPARATUS. 



In this invention rubber soles are subjected to both heat and 

 pressure in a vulcanizer and at the same time the design is im- 

 printed on the tread surfaces of the sciles 

 illustration, which is a 

 cross section of the ap- 

 paratus, A represents the 

 vulcanizer, and B a re- 

 movable table formed 

 with a hollow chamber 

 that is connected to an 

 exhaust pump by pipe C. 

 The upper part of the 

 table is provided with 

 engraved outlines form- 

 ing the tread designs and 

 the shapes of the soles, 

 one of w h i c h , D, is 

 shown in place. Connect- 

 ing channels in the de- 

 sign molds communicate 

 with air ducts E that 

 open into the hollow 

 chamber of the table. 



When the soles are placed in the vulcanizer and alined with the 

 design molds, air under pressure is admitted at F, which presses 

 the soles flat and embosses the treads. At the same time, the 

 air is exhausted from the chamber in the table, the entrapped 

 gases, fluids and moisture are forced out of the soles. Heat is 

 then admitted to the vulcanizer through pipe G. [Clifford Lee, 

 assignor to Goodyear's Metallic Rubber Shoe Co, — both of 

 Naugatuck, Connecticut. United States patent No. 1,232,573.] 



FABRIC BAND STRETCHING AND COATING MACHINE. 



A band of fabric is formed, compressed, stretched and coated 

 with rubber solution in a heated vacuum chamber and finally 

 passed through a cooling chamber, according to this invention. 



The illustration is a 

 sectional view of a bro- 

 ken side elevation of vac- 

 ufm chamber A, pro- 

 vided with suction pipe 

 B, heating pipe C and 

 stretching drums D and 

 E around which the fab- 

 ric band F passes. These 

 oppositely placed drums 

 comprise sections of re- 

 duced diameters that 

 stretch each wrapping 

 tightly until a certain 

 amount of elasticity has 

 been removed without 

 injury to the fiber. 

 The band enters through an automatically closing gate G and 

 passes out through the double gate H. 



Rubber solution is applied to the band through nozzles / and 

 / from solution tanks A' that are provided with weighted pistons 

 for positive feeding. Adjacent to each drum are scraping de- 

 vices L that remove the surplus rubber. The band is passed 

 through a cooling chamber, not shown, in which a blast of air 

 cools and hardens it so that it ma}- be handled. [Lawrence A. 

 Subers, East Cleveland, Ohio, United States patent Xo. 1.23-1. 704.] 



MACHINE FOR MAKING HOLLOW RUBBER ARTICLES. 



In the accompanying illustrations a side view and sectional 

 elevation are shown of one form of this invention, namely, a 

 machine for making hollow rubber balls. It is supported on a 

 base plate by two standards A and B and comprises two wheels 

 C and D of similar diameter that are journaled in suitable bear- 



ings and driven at uniform speed by a motor E. The upper 

 wheel is offset from the vertical plane that passes through the 

 axis of the lower wheel and in the periphery of each wheel are 

 arranged the upper and lower mold halves with cutting and 

 pressing edges that form the completed balls. The rims of the 

 wheels are chambered for steam that is supplied through pipes 

 F. Each cavity is provided with suction or vacuum openings 

 connected by pipes to release valves G and vacuum valves H, 

 supplied through pipes /, the flow of air to and from the molds 

 being regulated by these valves which are automatically oper- 

 ated bv cam rings /, 



