Sepi i in kk i, 1903.] 



THE INDIA RUBBER WORLD 



415 



RUBBER FACTORY APPUAN< 1 



AUTOMATIC DISC AND RING CUTTER. 



THE machine shown in the illustration herewith is designed 

 to cut, in ten hours, 80,000 bottle discs, rings for Map- 

 pers, and other similar rings of rubber, while formerly 1 man 

 was able to cut by hand, within the same time, only 30000 to 

 40,000 bottle discs, and still fewer rings. This machine cuts 

 simultaneously four pieces, which are conveyed to the circular 

 knife on a support with up and down motion. It works auto- 

 matically and accurately to /,., milli- 

 meter. Besides an exact and perfectly 

 uniform cut, as well as great capacity, 

 the machine presents the following 

 further advantages : The stock does not 

 have to be mounted on a core or man- 

 drel, nor does it have to be cut in short 

 determined lengths, but can be fed to 

 the machine in any desired length, thus 

 saving much waste. The feed is effected 

 by an ingeniously constructed 

 automatic mechanism of four 

 cylinders, two of which are 

 rubber covered. Kor 

 the variousdiameters 

 of stock, readily in- 

 terchangeable metal 

 guides are employed. 

 The thicknesses to 

 be cut are easily and 

 accurately adjusted 

 on a scale provided 

 for that purpose on 

 the machine. In or- 

 der to avoid the con- 

 stant refilling of the 

 upper basin by a 

 workman, and also 

 dry cutting, a pump 

 is attached to the 

 machine which 

 pumps the water used for cutting back into the upper basin. 

 The manipulation of the machines being the most simple im- 

 aginable, a boy can easily attend to three or four of them. 

 [Max Miiller, Hannover-Hainholz, Germany.) 



AUTOMATIC TUBING CUTTER. 

 In the early days of the rubber manufacture, when tubing 

 was made by hand and usually in 6 foot lengths, the cutting of 

 the ends, or into special 

 lengths, was a task that re- 

 quired a sharp knife, some 

 muscle, considerable skill, 

 and much time. After a 

 time a variety of simple 

 cutters weie evolved, that 

 shown in the illustration 

 being the latest type. This 

 machine is simple, compact, 

 and rapid. The tubes, ten 

 in number, are laid in the 

 grooves shown in the fore- 

 front, and the machine set 



for the length of cut desired. With the application of the 

 power the tubes run through with remarkable speed and drop 



in bunches on the other side. The cut is clear and clean and 

 all of the tubes are exactly alike as to length. One of these 

 machines will do the work of ten hand cutters, and not work 

 up to speed .it that. 1 Excelsioi Machine Works, Akron, Ohio.] 



A NEW II KING MACHINL. 

 T11 k tubing machine (or rubber, of which an illustration is 

 here shown, has a number of special advantages. In the first 

 place, by the use of four needle valves, it has but one water 

 pipe and one steam pipe. The screw, which is of steel, has a 

 double increase pitch, so that it kneads the gum before deliver- 

 ing it through the die, in compressed form. The bore is per- 

 fectly clear, with no undercuts from the spider, making a 



change of stocks very easy and rapid. In changing dies it is 

 not necessary to take off the head. Ry the use of the spanner 

 and the loosening of a couple of set screws the change is easily 

 effected. The steam jacket also extends clear to the front of 

 the die so that no torch or gas jet is needed to make the gum 

 flow easily. The gears are Brown & Sharpe cut gears and the 

 machine is built especially for fine work, from ', to 4 inch, 

 inclusive. [Excelsior Machine Works, Akron, Ohio.] 

 THE CROWNING OF RUBBER COVERED ROLLS. 

 The old time Poole grinder is historic. Its adaptation to the 

 needs under consideration, a change that makes it unique, con- 

 sists in a tapering device which allows of the accurate crown- 

 ing of rolls to the thousandth of an inch. To digress a moment, 

 the writer well remembers when expert rubber manufacturers 

 scoffed at the idea of a spring in huge calender rolls that ne- 

 cessitated crowning, but no one takes such a position to-day. 

 Only those of the rubber manufacturers who supply the wants 

 of the paper trade know how accurate the crown on a roll must 

 be, but a variation of one or two thousandths of an inch from 

 the correct amount delivers the sheet of paper thin in the mid- 

 dle or at the edges and condemns the mil. The machine ordi- 



