144 



THE INDIA RUBBER WORLD 



[December 1, 1916. 



Each machine is fitted with a long electric cord, attachment 

 plug, gage, high-pressure hose and quick-acting coupling. It 

 will operate from any HO-volt lamp socket and is guaranteed 

 to develop 12S pounds air pressure without overheating. It 

 has a displacement of about lYi cubic feet of air per minute 

 and will inflate the largest tires to 100 pounds pressure in one 

 or two minutes. [The Black & Decker Manufacturing Co., 

 Baltimore, Maryland.] 



A PORTABLE FOOT-POWER SEWING MACHINE. 



Here is a light, portable foot-power sewing machine that can 

 be used in any department of a rubber mill where end-piece sew- 

 ing is required. It is self-contained and designed for moving 



about when the use of power is 

 not practical nor convenient. 

 In tire plants where quanti- 

 ties of rags are used for wrap- 

 ping the treads during vulcan- 

 ization, end-piece sewing is an 

 item that includes necessary 

 equipment and considerable 

 labor, both of which could 

 doubtless be reduced by this 

 simple machine. 



In footwear factories where 

 cloth books are a necessity and, 

 in fact, wherever cloth liners 

 are used, the need of a sewing 

 machine for joining together 

 the ends is apparent. 



The ends of the cloth to be 

 united are laid on a large feed 

 wheel that is provided with 

 holding pins which main- 

 tain the two pieces of 

 cloth in relative position 

 and at the same time 

 permit the cloth being 

 stitched during the sewing 

 operation. It is arranged 

 so that the feed wheel can 

 be instantly thrown out of 

 gear and thereby short stitches and the breaking of needles are 

 entirely obviated. 



This machine will sew all kinds of cotton or woolen goods, 

 thick or thin, wet or dry, and is carefully constructed. [Dins- 

 more Manufacturing Co., Salem, Massachusetts.] 



MACHINERY PATENTS. 



THE BANBURY MASTICATOR. 



'T'HIS machine is of the Pointon type and provided with re- 

 •* volving blades which act in conjunction with stationary sur- 

 faces imparting a kneading action to the mass. The drawing 



is a cross section of the 

 machine, which is duplex 

 in character, comprising 

 two cylindrical casings 

 A and B in which the 

 two rotors C and D re- 

 volve towards each 

 other. The rubber being 

 placed in the hopper at 

 the top, is fed by the 

 weight ,of plunger E to 

 the rotating blades. The inclined blades of the rotors force the 

 material continuously from the ends of the machine to the 



center, rolling and kneading the rubber against the walls of the 

 cylindrical casings until it is thoroughly massed. ThS casing 

 walls may be smooth, as shown on the right, or provided with 

 grooves shown at F ; moreover, the entire surface may be ser- 

 rated as shown at G. [Fernley H. Banbury, East Orange, New 

 Jersey, assignor to Birmingham Iron Foundry, Derby, Connecti- 

 cut. United States patent No. 1,200,070.] 



PNEUMATIC TIRE BUILDING MACHINE. 



The old-time hand method of building tire casings has long 

 since proved to be unequal to the present high production stand- 

 ards. The development of tire building machines has therefore 



progressed steadily and 

 the modern American 

 type is almost entirely 

 automatic. The strips 

 of frictioned fabric are 

 supplied under tension 

 to the revolving core 

 and the successive plies 

 smoothed down by roll- 

 ers. 



Paridon's invention, 

 however, possesses cer- 

 tain novel features that are radical departures from the cus- 

 tomary design and are therefore interesting. 



The drawing is an end elevation of the machine, which is 

 duplex in construction. The description applies to both units, 

 but will be confined to the one on the right. There are four 

 frames, only one being shown at A, which support two sets of 

 fabric rolls B, liner rolls C and tension rolls D. The frames are 

 moved longitudinally to bring the fabric rolls alternately in line 

 with the core by a reciprocating hydraulic piston E, operated 

 by a four-way valve. As the fabric strip is applied to the core, 

 adhesion of the successive plies is assisted by a jet of air from 

 the nozzle F. The two smoothing rollers G are operated by 

 rack and pinion movement controlled by the vertical hydraulic 

 piston H. The front faces of the smoothing rolls are recessed 

 with convolute openings through which air is forced, materially 

 aiding the stitching operations and preventing the formation of 

 air bubbles between the fabric plies. [Michael Paridon, assignor 

 of one-half to Henry A. Rudd, both of Barberton, Ohio. United 

 States patent No. 1,202,884.] 



RUBBER DUST GRINDING MACHINE. 



The Gardner machine for reducing rubber to fine powder is 

 of the type in which an abrasive cylinder is rotated and which 

 at the same time receives an axially reciprocating motion. The 



cylinder A is formed with 

 a series of abrasive strips 

 set longitudinally on its 

 periphery, between which, 

 openings are arranged for 

 the flow of air forced out- 

 wardly by internal fan 

 blades. The cylinder is 

 mounted in a casing B 

 provided with openings 

 for the feed of the mate- 

 rial C, a hopper D at the 

 bottom which receives 

 unground fragments, and 

 a hopper E at the top by which the unground fragments are 

 returned to the grinding-cylinder. The casing and the upper 

 and lower hoppers are connected by screened pipes F, G, H with 

 a suction trunk pipe / leading to a draw-oflf fan and receptacle 

 for the rubber dust. The axle of the cylinder is reciprocated 

 by a bell-crank lever / operated by worm gearing, connected 



