November 1. 1914.] 



THE INDIA RUBBER WORLD 



03 



MACHINE FOR FOLDING EDGES OF SHEETS. 



' I "HE illustrations herewith show an end elevation and a plan 

 of a machine for folding hack the narrow strips of rubber 

 which sometimes project beyond the edges of coated fabrics 

 This work has heretofore been done by hand and as the rubber 

 is unvulcanized and of sticky character, the problem lias presented 

 some difficulties. 



The machine has a bed plate ./ carrying at the front a roller B. 

 over which the coated fabric C is moved by hand. As the fabric 

 moves along in the direction of the arrow .V in the plan view, 



with adjustable and detachable walls for forming the edges. 

 These side walls are moved in or out by set screws, so that 

 several widths of sole may be formed for each length of 

 shoe. By detaching the walls, Others may be substitute.] to 

 vulcanize sole> of different thicknesses. [U. S. Fat. 1,111,436, 

 September 22, 1914. George F. Butterfield, I ambridge, 

 M.i sa< husetts. I 



Ai 



WIRE SPIRALS FOR TIRE TREADS. 



apparatus has been devised For winding win -pirals and 



ing them with rubber compound for incorporation in the 

 treads of tire casings. As the spiral is wound 

 it is run through a tube into which the com- 

 pound : s forced by a feed screw. This forms 

 a composite rubber-wire cylinder, which is cut 

 into proper lengths and laid in the tread as the 

 latter is built up In the completed tire there 

 are four of these wire spirals running longi- 

 tudinally around the tread just under the sur- 

 face of the rubber. [U. S. Pat. 1,111,418, Sep- 

 tember 22, 1914. F. L. O. Wadsworth, 

 Sew ickley, Pennsyh ania.] 



Mm uink 



Folding Edge of Rubber Sheets. 



the projecting edge of rubber is thrown up and back by the 

 rapidly revolving belt driven disc /' having a smooth edge. The 

 folded strip of rubber then passes under a hammer E, which is 

 pivoted at F and operated by an eccentric G through a connect- 

 ing rod H , the eccentric being mounted on a ball bearing on a 

 shaft / rotated by a belt pulley /. The hammer delivers light but 

 rapid blows and presses the rubber strip down firmly and 

 smoothly on the fabric. [U. S. Pat. 1.111,232, September 22. 

 1914. J. E. Perrault, assignor to Hood Rubber Co., Watertown, 

 Massachusetts.! 



CLICKING MACHINE FOR CUTTING UPPERS. 



I Irdinarily, clicking presses for cutting out 

 shoe uppers cannot be made to operate over 

 wide stock without having the machine too 

 large and cumbersome or making the cutting 

 block movable. To obviate these difficulties 

 an attachment has been designed by which, 

 after the whole area of the cutting block has 

 been cut over, the stock is shifted to the opposite end of a pair 

 of supporting rails, bringing the uncut stock within the range of 

 the cutter. [U. S. Pat. 1,113,326, September 29, 1914. C. II. 

 Roper, assignor to Hood Rubber Co.. Watertown. Massachusetts.) 



OTHER MACHINES OF THE MONTH. 



IX addition to the machinery described in some detail and 

 illustrated above, several other appliances for use in the 

 manufacture of rubber goods have appeared during the past 

 month, descriptions of which, without illustration, follow. 



FEEDING FABRICS TO SPREADERS. 



This is a device for quickly and smoothly attaching the 

 leader strip or apron to the fabric, eliminating the loss of 

 time required where the ends of the two pieces are sewed 

 together, and doing away with the wrinkles caused by the 

 stitches. The device is a narrow metal plate as long as the 

 width of the apron, with its front and rear edges bent over 

 to form hooks. The rear end of the apron and the front end 

 of the fabric are each wrapped around a narrow clamping 

 strip, and these are slipped under the hooks on the plate. 

 The spreading knife is then raised to allow the plate to pass 

 under and the spreading is begun directly at the end of the 

 fabric, so that there is no waste. [U. S. Pat. 1,110,633. 

 September IS, 1914. C. J. Landin. assignor to Clifton Manu- 

 facturing Co., Boston, Massachusetts.] 



BRAIDING MACHINE FOR TIRES. 



\ machine has been patented for braiding tire carcasses 

 in annular form, in which a braiding mechanism of ordinary 

 construction revolves horizontally around the tire core, the 

 latter being revolved vertically between guide rollers. When 

 a layer of the fabric is braided entirely around the core, it is 

 covered with a thin layer of rubber compound and a second 

 layer of fabric is braided into it. This is repeated until the 

 carcass is of the desired thickness, when it is slit along the 

 inner diameter and the edges bound to prevent unraveling or 

 turned back to form the bead. This serves as the body of 

 the tire upon which the tread may be built in the usual waj 

 [British Pat. 7,226 (1914 1. W. H. Dunkerley and T. J. \r 

 nold. Paterson. New Jersey.] 



SHOE SOLE VULCANIZER. 



This is a vulcanizer for applying rubber soles to leather 

 shoes. Unlike the ordinary dug-out or sunken mold, it con- 

 sists of a base plate, engraved to form the bottom of the sole. 



APPARATUS FOR MAKING BULBS. 



This comprises two separate devices, the first for forming 

 the bulb with one end closed and the other open in cylin- 

 drical form; the second device is for closing and finishing 

 the bulb. The first of these has four hydraulic cylinders; two 

 for closing the mold, one for operating the mandrel, and one 

 fur forcing the compound into the mold. After removal from 

 the mold, the open end of the bulb is closed by placing it 

 over another mandrel of elliptical shape, and expanding a 

 strong rubber ring over it. As the mandrel is slowly with- 

 drawn by a feed screw, the rubber ring contracts around the 

 open end of the bulb and closes it. The surplus rubber i- 

 cut from the end of the bulb, which is then vulcanized. 

 [British Pat. 7,299 (1914"). Rudolf Daeschner, Pasing. near 

 Miinchen, Germany.] 



