March 1, 1914.] 



THE INDIA RUBBER WORLD 



317 



New Machines and Appliances. 



MACHINE FOR SLICING. WASHING AND SHEETING RUBBER. 



AMONC; till- recent liritisli patents is a machine designed 

 for slicing crude rubber into sheets, simultaneously 

 washins the rubber and rolling the sheets. The ma- 

 chine comprises a guillotine knife for cutting the rubber, two 

 pairs of washing rollers and a pair of rollers l)el\veen which 

 the sheets of rubljcr are run after washing, 'i'he drawings 



ne.sl cutting stroke. Un the downward movement of the knite 

 the chain is slackened, the presser bar grips the rubber and the 

 cycle of operations is repeated. During the cutting a stream of 

 water plays over the rubber from the pipe -Y. 



As each sheet of rubber leaves the cutter it passes between 

 ihe pair of gro.)ved washing rollers O, where it is squeezed and 



rr.llcd to all." 



the impurities to escape. The rul)ber is carried 

 by the moving conveyor R to the second pair 

 of rollers .S. where it is again rolled and 

 pressed, riic rubber is now carried on a sec- 

 ond conveyor 7' to a third pair of rollers U 

 which give a more or less polished surface to 

 the sheets. These rollers are driven through 

 gears /' and chain IV from the belt pulley Y. 

 I British Patent \o. 37 (1913), granted t.. 

 James Donnelly, 21 Mincing Lane, London. | 



Cutting .nnh 



herewith sliow a front and a side elevation oi the machine. 

 The lied A carries a table B. above which are secured two up- 

 rights C and D, forming guides for the knife P.. \ transverse 

 shaft F carries two cranks G to which are attached the lower 

 ends of the connecting rods H. The upper 

 ends of these rods are pivoted to the outer 

 ends of the knife P-. The upright guides C 

 and I) carry two rollers / which work within 

 diagonal slots / in the knife. .'Kbove the tabic 

 li is a pusher board A.', extending through a 

 slot in the table, and secured above the rack 

 L. This rack is moved forward a short dis- 

 tance after each stroke of the knife, pushing 

 the lump of rubber in front of the board A', 

 under the blade of the cutter. This is accom- 

 jjlishcd by means of the pinion M, to whicli 

 is attached a ratchet and which is operated b\ 

 cacli upward movement of the knife through 

 a ciiain .V. .'Mjovc the table is a presser bar 

 O. wliich is held down l)y means of helical 

 springs and which is used to hold the rubber 

 lirmly in position against the table during 

 the cutting. The carriage which bears this 

 presser bar may be adjusted by means of 

 the hand screw P to fit different sized lumps 

 of rubber. 



The operation of the cutting mechanism is 

 as follows : A lump of crude rubber is placed 

 on the table and pushed forward under the knife. When the 

 machine is set in motioi; the knife is pulled downward and to 

 one side, giving a diagonal slicing motion instead of a straight 

 cut. On the upward movement of the knife its upper edge 

 comes in contact with arms extending from the carriage and 

 raises the presser bar by compressing the springs. .\t the same 

 time tlie chain N operates the ratchet mechanism on the pinion 

 M, thus feeding the rubber forward along the talde for the 



ANOTHER NEW TIRE-WRAPPING MACHINE. 



The accompanying drawings show two views 

 of a new tire-wrapping machine upon which 

 letters patent were recently granted and in 

 which a well-known rubber company is inter- 

 ested. The machine will, no doubt, soon be 

 placed upon the market. It is designed for 

 wrapping the fabric of tire casings in such a 

 way that any desired tension may be imposed 

 U])on each layer and a uniform tension im- 

 posed upon all portions of each layer. I'niike most machines of 

 this character, the mandrel upon which the tire is wrapped is 

 held stationary, while the wrapping mechanism revolves around 

 it and carries the stock mil ar-miid the mandrel. 



Edmonds' Tire W'R.vrpiNC M.\chine 



Mounted above the frame A is a shaft B which carries a 

 chuck C. This chuck has radial arms, to the outer end of which 

 the mandrel or core D ,is attached. The shaft B is mounted 

 loosely in its bearings and it may be held from revolving by 

 a pin E projecting into a collar on the shaft. The mechanism 

 for wrapping the fabric on the core comprises a pair of annular 

 rings /•■ and G supported by the frame //. These rings are pro- 

 vided at regular intervals with six pairs of rollers / which bear 



