July 1. 1916] 



THE INDIA RUBBER WORLD 



539 



KACHUfZ FOR ENOBATBia HOH-BKIO TIBS MOLIM. 



The universal engraving machine illustrated and brietly de- 

 scribed here, was designed for the purpose of engraving non- 

 skid molds used in the manufacture of pneumatic tires of all 

 descriptions. 



It works on the familiar pantograph principle, where a tracing 

 pin at one end of the pantograph is guided over a carefully 



f CHAIN TREAD > 

 C(/T % "JJEEP WITH 

 ^S POINT INOEt, 

 TIMEZ-kHOUF(S- 

 mRK HOLDER ON (,^^ 

 ^ ^O LErVERS ' . 



prepared copy of the design which it is desired to reproduce, and 

 the engraving tool at the opposite end of the pantograph ac- 

 curately cuts this design in the tire mold. 



A is the tracing pin and B the engraving tool. The copy to 



for adjusting the position of the work holder. The drum G is pro- 

 vided for moving the work through fractional parts of a revolu- 

 tion. The "copy'' guides the engraving tool in a horizontal plane, 

 but owing to the fact that the mold is concave, a template H is 

 provided to control the vertical movement of the engraving tool. 



The vertical cutter spindle is mounted in the frame /, to which 

 the motor spindle drive is also attached. The motor and spindle 

 mechanism are supported on the link K, which in turn is carried 

 by the pivot L, and a similar pivot on the column slide. These 

 pantograph pivots are fitted with radial and thrust ball bearings, 

 so that the movement is very sensitive. 



All types of molds, for all sizes of tires up to 48 inches in 

 diameter, can be engraved on this machine. Concerning the rate 

 of production, a letter S, X'A inches high, was engraved in a 

 forged steel ring to a depth of 5/16 inches in four minutes. The 

 same letter was engraved in cast iron in V/i minutes. The 

 dimensions of the machine are as follows : Height 12 feet, floor 

 space 5 by 9 feet, net weight 18,000 pounds. [George Gorton 

 Machine Co., Racine, Wisconsin.] 



THE ■GIANT • BUBBXa SCBAP CUTTEB. 



The increased use of motor trucks within the last few years 

 has naturally thrown a great many old tires on the rubber 

 scrap market, which has brought up new problems as to the 

 best way of getting them 

 into shape for reclaim- 

 ing. A very heavy, 

 strong machine is of 

 necessity required for 

 cutting these large solid 

 A cutter built to meet these 

 iiditions is the Taylor-Stiles No. 

 11 "Giant" rubber scrap cutter, il- 

 lustrated here. 



The frame is made of one solid 

 casting weighing over 2,800 pounds. 

 The head, or revolving knife cylinder, is steel, 20 inches in 

 diameter, weighing about 1,100 pounds, and is practically un- 

 breakable. The main shaft is 6-inch hammered steel, with bear- 

 ings 1! 3/16 by S-Vs inches. It is equipped with two 24 by 

 8>^-inch special balance shearing pulleys, one on each side, 

 which gives a nearly perfect balance and enables the cutter to 

 be driven either right or left hand. The shearing feature of 

 these pulleys prevents the possibility of any serious damage 

 due to running iron or any foreign matter into the machine. 



After the tire has been cut once, it is fed endways into the 

 feed box and passing under the spiked feed roll, it is cut off 

 into slices from l-i-'mch to 54-inch thick by the three 17-inch 

 revolving knives cuttmg against the bed knife, leaving the ma- 

 terial in good shape for further treatment. This machine will 

 handle equally well pneumatic tires, hose or any other rubber 

 scrap. [Taylor, Stiles & Co.. Riegelsville, New Jersey.] 



be followed is fastened to the holder plate C, while the mold to 

 be engraved is clamped to the index plate D, which can be ad- 

 justed to any angle by the hand wheel F. The handle E provides 



MACHINERY PATENTS. 



PRICES VACUUM MASTICATOR. 



WHEN rubber stock is prepared previous to vulcanization it 

 is very important that the material should be free from en- 

 trapped oases or liquids. This object is accomplished by the 

 novel application of a 

 vacuum in connection 

 with a machine com- 

 monly known as a mas- 

 ticator. 



In the illustration, 

 which shows a side 

 elevation in section, A 

 is the cylindrical casing 

 jacketed for heating 

 hinged cover B. The corrugated 



and cooling, provided with a 



