258 



THE INDIA RUBBER WORLD 



Janu.\j(y 1, 1921 



and automatically places them in books or wind-iip, if books arc 

 not desired. It is claimed that even with the "take ofT" the cuttei 

 still occupies a minimum amount of floor space and increases the 

 efficiency of bias cutting since it produces a great saving in labor 

 and expense. It may be seen at the permanent exhibit on the sixth 

 floor of the Grand Central Palace, 480 Lexington avenue, New 

 York. — Spadone Madiine Co., 136 Duane street, New York City. 



INNER TUBE SPLICING BRUSH 



Camel's-hair brushes are customarily used for applying pure 

 gum cement and tnbe splicing acid in the manufacture of 

 inner tubes. As a less expensive substitute, the brush here 

 illustrated can be _^ 



recommended to " =^i-.' 



the trade. It is 

 made with triple 

 thick black Chi- 

 nese bristles and XXX Chinese Brush 

 h\ widths from 1 to 3 inches, with lengths of hair from 2 to 3 

 inches. — E. F. Hooper & Co., Trenton, New- Jersey. 



MACHINERY PATENTS 



CONTINUOUS TIRE VULCANIZER 



THIS invention provides a heater tlircjugh which the tires pass 

 continuously and are vulcanized, and at the same time ob- 

 viates the necessity of exhausting the steam in order to remove the 

 tires, thus eliminating a waste in labor and loss in steam. 



This machine consists of a cylinder A of suitable diameter to 

 allow the molds containing the tires to be passed through it. 

 Steam of 40 pounds pressure, and at least 287 degrees F. is 

 admitted into the cylinder through a pipe connected with the 

 steam boiler. .\n exhaust pipe is also provided for the purpose 

 of exhausting steam when necessary. 



The tire encased in the mold is placed within the open chamber 

 of the rotatable plug B, after which the plug is given a quarter 

 turn. The opening containing the mold will then register with 

 the slot C in the casing which is in alinement with the slot D 

 in the cylinder A. Slot D is large enough to allow the admission 

 of the mold carrying the tire into the cylinder A. Next the cyl- 

 inder E is operated and its plunger passes through the open 

 chamber of plug B and pushes the mold with the tire through 

 the slot D into the cylinder A. Then the cylinder F is operated. 



A Novel Tire Vulcanizer 



.Attached to it is a plunger which is slightly less in size than the 

 inside diameter of the cylindrical vulcanizer. This moves the 

 mold carrying the tire through the vulcanizer. 



The operation is repeated until the cylinder is filled with tires, 

 and by the time the first tire reaches the end of the cylinder it 

 Has been cured and is ready to be removed. It is forced by 



another plunger into the open chamber of the rotatable plug G, 

 which is turned until it registers with the opening or slot in the 

 casing through which the mold is removed. — Thaddeus F. Baily 

 and Frank T. Cope, .-Mliance, Ohio. United States patent No. 

 1,346,158. 



MACHINES FOR MAKING BATTERY JARS 



WILLARDS MACHINE AND PE0CES8 



This invention relates to an apparatus for forming storage 

 battery jars from rubber or rubber compound. It consists of a 

 mandrel A in the shape of the jar, mounted on a flat bed B, and 

 a number of dies C secured to hydraulic rams, which are ar- 

 ranged to direct pressure to the sides and end of the mandrel, 

 tlicreby forcing around the mandrel A, the rubber compound, 

 which is in sheet form, thus forming the jar. Fig. 1 is a sectional 

 plan view, and shows the four side dies in position, while the 

 cross-sectional view shows the sides of the jar already formed 

 and the upper die for the top. 



After the rubber compound is rolled into sheets of the correct 

 thickness, it is cut info pieces approximately the size of the top 

 and sides of the jar. These pieces are then placed on the mandrel 



Figl 



Willard Battery Jar Machine 



a 



cCM 



Fig2 Boycr Batteryjar Machine 



A. The horizontal dies indicated by C are mechanically forced 

 inwardly, compressing the rubber and forming the sides of the 

 jar. The concave spring metal face D of each die comes in 

 contact with the rubber first at the middle, then works out to 

 the edges. .-\s the metal face D flattens out, it gradually forces 

 out the air between the rubber sheet and the mandrel A. At the 

 same time the surplus rubber is brought to the end of the sheet, 

 where it is squeezed together with the rubber from the adjoining 

 sheet, thus forming the corners. The operation of squeezing the 

 ends together eliminates all seams or joints. When the sides are 

 formed, the top die is lowered to form the end of the jar. — 

 Theodore A. Willard, Cleveland, Ohio. United States patent No. 

 1,352,160. 



Patent No. 1,352,161 issued to Theodore A. Willard, of Cleve- 

 land, Ohio, covers the process of forming hard rubber storage 

 battery jars with the apparatus described above, covered by 

 patent No. 1,352,160. 



BOYER'S MACHINE 



Anotlicr patent has been issued which covers a method of 

 making battery jars similar to the one mentioned in the forego- 

 ing paragraphs. The drawings in Fig. 2 give a concise idea how 

 the jars are made. Plastic uncured rubber, previously rolled 

 to the required thickness and cut to size, is wrapped around the 

 metal core A, which is the size of the inside dimensions of the 

 battery jar, except a little longer. As soon as the operator has 

 placed the riil)lier around the core it is placed in the pressing 



