December 1, 1918.] 



THE INDIA RUBBER WORLD 



New Machines and Appliances. 



T 



THE WARWICK RUBBER TRIMMER. 

 HERE are several types of overflow-trimming machines 

 employing different forms of mechanical construction in 

 accordance with the work to be performed. 

 The Warwick machine is designed to remove the rind from 

 moulded rubber goods in large 

 quantities, and employs a new 

 mechanical principle in that the 

 carriage supporting the die 

 reciprocates under a revolving 

 roller. Dies are inade con- 

 forming to the particular article 

 to be trimmed. In the case of 

 rubber heels, the correspond- 

 ing die is clamped to the platen 

 and the operator places an 

 untrimmed heel in the die. The 

 machine is started by pressure 

 on the treadle and the carriage 

 carries the die under the roller 

 which cuts the overflow. The 

 finished heel is automatically 

 ejected at the back of the ma- 

 chine and the carriage returns 

 and stops, when the operation is repeated. 



The output is limited only by the dexterity of the operator 

 The output is limited only by the dexterity of the operator, 

 be done on the machine. (Rumrill & Co., 52-58 Purchase St., 

 Boston, Massachusetts.) 



TIRE-BEAD TRIMMER. 



Trimming tire beads by hand is an obsolete process in 

 modern plants, due entirely to the development of special bead- 

 trimming machines. A row of hand bead-trimmers wielding 

 heavy shears is rarely seen these days when labor-saving and 

 production are the prime factors in tire making. 



While the bead-trimmer shown in the accompanying illustra- 

 tion is familiar to most tire manufacturers, the fact that the 



Overflow Trimmer. 



Bridgewater Tire Bead Trimmer. 



present machine is the ultimate embodiment of many improve- 

 ments, makes it worthy of mention. 



The machine is simple to operate and in fact it is said that 

 one boy can handle the bead output of the average tire plant, on 

 this trimmer. Reduced to figures, the makers claim that this 

 machine will trim about 90 feet of clincher bead per minute and 

 15 feet of straight side bead per minute. (Bridgewater Machine 

 Co., W. E. Wilson, selling agent, Akron, Ohio.) 



S-TATKi 



the shaft is keyed 



Scrap W. 



THE "U. E." PLANTATION SCRAP-WASHER. 

 The washer here pictured is specially designed for the purpose 

 of producing clean crepe from scrap, or blending tree scrap, 

 bark shavings and earth pickings for the manufacture of uni- 

 form crepe. Moreover, by washing out the sand, excessive wear 



on the rolls of 

 the crOping and 

 macerating ma- 

 chines is pre- 

 vented. 



The machine 

 and driving 

 shaft are 

 mounted on a 

 rigid bed plate, 

 and the belt- 

 driven shaft is 

 provided with a 

 friction clutch 

 for starting and 

 stopping the 

 machine. On 

 machine molded double helical pinion that 

 meshes with a large gear of similar construction, keyed to the 

 washer-shaft on which are mounted solid disks that revolve with- 

 in the casing. 



The operate the machine, engage the clutch, thereby starting 

 the disks revolving, then open the bottom valve and turn on a full 

 head of water, allowing it to flow straight through the machine 

 without flooding the hopper. In treating ordinary bark shav- 

 ings containing about 30 per cent of rubber, fill the hopper with 

 shavings half way up, and when the machine has worked this 

 charge for a few minutes and passed away some of the bark, 

 leaving space for more, refill hopper half way up. After the rub- 

 ber is cleaned, close the bottom valve and flood the hopper with 

 water, allowing the rubber to float to the surface, when it can be 

 picked out by hand. Do not stop the machine, but allow the 

 disks to rotate to enable the rubber that may be at the bottom of 

 the hopper to be worked free and float to the surface. 



To obtain the maximum results, remove the rubber as soon as 

 it is formed into lumps, as by this time 95 per cent of the impuri- 

 ties is removed and the remaining 5 per cent can be washed 

 away by the crepeing machine when the lumps are being laced 

 up and rolled into sheets. (United Engineers, Limited, Singa- 

 pore, Federated Malay States.) 



TRANSFER-PRINTING ON INNER TUBES. 



The advent of the automobile called for a new kind of printing, 

 that of transfers for imprinting the size and brand on the inner 

 tube. In the early stages of the tube industry, the size and name 

 were put on with stencils, a process neither satisfactory nor 

 economical. After various stages of development, printed trans- 

 fers were found to be the best. 



Although there are different kinds and grades of transfers, all 

 fundamentally alike, the best results, however, are secured by 

 thin cloth, glazed on one side and printed with a sizing and then 

 finished with a copper bronze. The greatly increased cost of 

 cotton, as well as labor, makes these expensive. In curing the 

 tube, the action of the sulphur causes the bronze to change to a 

 dense black. The next best process is to print on the cloth 

 with a special black ink. 



Even before the increase of the price of cloth, many tube 

 makers had adopted the use of paper transfers, as they were 



