206 



THE INDIA RUBBER WORLD 



[January 1, 1914. 



New Machines and Appliances. 



THE LATEST SLITTING AND REWINDING MACHINE. 



THE slitting and rewinding of slieet rubber and rubber- 

 coated fabrics is a process which increases in difficulty 

 in proportion as the requirements call for accurate work. 

 In most machines designed for this purpose, the problem of 

 slitting the material ha.s usually been considered as distinct 



Fig. 1. — Detail of Cutting Discs and Steel Roller. 



from the problem of rewinding. In a new machine which 

 has just been placed upon the market the rewinding device 

 assists in the slitting of the material and the two units of 

 the machine have been made inter-dependent. 



Several innovations have been introduced in this machine, 

 which has already been installed in a number of the prominent 

 rubber factories. The most noteworthy feature is the device 

 used to slit the material. Instead of using a pair of rotary 



full width of the machine and may be raised or lowered by 

 means of a cam F in order to bring the cutting wheels into 

 or out of contact with the steel roller G. This roller is made 

 of much harder material than the cutting wheels, in order 

 that it may not be scored and thus require regrinding. The 

 cutters C are arranged so that they may be easily removed 

 for sharpening. In order that the cutters may be pressed 

 against the roller G with some force and with a somewhat 

 yielding pressure, a leaf spring H is attached at the rear end 

 of each lever D, the opposite end of the spring being fastened 

 to the frame of the machine. 



The amount of pressure which may be brought to bear 

 upon the material which is being rewound upon the shaft B 

 may be controlled by a riding roller K. This roller extends 

 the full width of the machine and its pressure upon the ma- 

 terial is varied by means of counterweights suspended from 

 cables attached to pinions which operate in racks secured to 

 the bearings of the roller K. Fig. 2 shows this riding roller 

 raised for convenience in threading the material onto the 

 rewinding shaft. It will be noticed that the fabric passes un- 

 der a swinging roller L which serves to put a tension upon 

 the material before it reaches the cutters. The cutting wheels 

 may be arranged in any manner and at any desired distance 

 apart for forming rewound rolls of different widths. In case 

 the fabric is not entirely cut through by the wheels C a series 

 of seam-slipping blades M is arranged above the idle roller 

 N so that the strips are separated before reaching the rewind- 



FiG. 2. — Cameron ^Iachine with Cutting Discs Lowered. 



cutters which shear the material, the device used in this ma- 

 chine is called a "score cutter." Unlike the rotary shear, it 

 does not actually cut through the material, but really presses 

 through it against a steel roller. The V-shaped edge of the 

 cutting wheel cleaves through the fabric the same as a chisel. 

 Referring to the drawings, Fig. 2 shows a roll of cloth A 

 threaded in one ol several possible ways to the rewinding 

 shaft B. The cutting wheels C are pivoted in the end of 

 levers D which rest upon a crossbar E. This bar extends the 



Fig. 3.— AIachine with Cutters Raised into Slitting Position. 



ing shaft B. The construction of the cutting discs and of 

 the steel roller G is seen in Fig. 1, which shows their arrange- 

 ment in relation to the rewinding shaft. The latter is 

 mounted in vertical guides which allow it to be raised as the 

 diameter of the rewound rolls increases. Fig. 3 shows the 

 cutting wheel in its raised position and shows the machine 

 delivering fabric from flat folds O over a guide board P and 

 finally on to the rewind shaft after passing between the cut- 

 ters and the steel roller. 



