44*1 



THE INDIA RUBBER WORLD 



[May 1. 1915. 



RUBBER SOLE PRESS. 



"Pill anying drawing shows a press for attaching rub- 



* ber soles to boots or shoes. This press is composed of a 



frame vhi ! trong but flexible web B is tightly 



stretched and fast- 



=fc 



ened. A curved 

 metal band c', rein- 

 forced at its center, 

 is fastened to the 

 frame and extends 

 the web. The 

 reinforced cent< 

 this band i- ' 



vided with a thread- 

 ed hole D through 

 which the tin 

 screw li passes 

 This has a' 



er end a press plat< F By turning E the press-plate can be 

 raised from or forced towards the web. The frame is cut out 

 on one side so that tin- shoe can lie set upright on the cradle 

 formed by tin web. \ piece of rubber cut to shape is fixed t<> 

 the undei side of the press plate. [Continental Caoutchouc & 

 Gutta Percha Co., German patent G. M. 621,569.] 



IMPROVED RING CUTTING MACHINE. 



' I 'HIS is an improved machine of the multiple mandrel type 

 ■*■ for cutting rubber tubes into washers and rings. The man- 

 drels on which the tubes are placed are held between rotary 

 discs, forming a S'>rt of reel, and are caused to rotate as they 

 are presented to the cutting arrangement. Once the cutting is 

 done this movement of rotation is arrested so that the man- 

 drels can he removed and new ones adjusted in their place. In 

 this improved machine the mandrels are ejected automatically 

 and fall on a receiving table, manual labor being limited to the 

 placing of the mandrels in the machine. 



Tlie illustration shows an end view of the new machine, suf- 

 ficient to explain the improvements. A is one of the mandrel- 



carrying discs keyed to shaft B, supported by bearings in the 

 side frames C. The mandrels are set in centers arranged on 

 the discs and shown by dotted circles in the illustration. D is 

 an endless 1 -It driven by pulley E keyed to the shaft F. This 

 belt causes the mandrels to rotate as they pass under the cut- 

 ting arrangement. G is the table which receives them as they 



are ejected by a tripping mechanism, and hi a spring brake 

 which arrests their rotation as they present themselves to the 

 ejector. Idlers / and J , which maintain constant tension of belt 

 1). are held in proper position by springs K. 



The operation of this machine is continuous, new mandrels 

 leiim adjusted by the operator without any stoppage of the 

 machine. [Bertrams, Limited, and Robert Fausset Gillespie, 

 both of Edinburg, Scotland British patent Mo. 1.916.] 



THE ADAMSON HOSE WIRING MACHINE. 



' I '111-', illustration shows a ma- 

 ■*■ chine designed to cover 

 standard garden or steam hose 

 with wire. Ii will wind a vari- 

 ety of sizes of wire, round, hall 

 round or flat, and in any pitch 



required. A novel feature of 

 the machine is the mechanism 

 that winds the wire so that it 

 clings closely to the hose. This 

 prevents unwinding in case any 

 of the wire strands .should break 

 from use or be cut by accident. 

 In the process of winding, the 

 hose is revolved as it passes 

 through the winding head, where 

 it is wired at the rate of 15 feet 

 per minute. [The Adamson 

 Machine ( i p Akron, Ohio.] 



OTHER DEVICES. 



Molding Rubber Articles. A 

 German invention provides for 

 the manufacture of hollow seam- 

 less rubber articles by mechan- 

 ically operated molds and a separate machine for closing the 

 open end of the molded article. 



The table of the machine is mounted on columns and supports 

 two horizontal hydraulic presses. These open and close the 

 mold, which is chambered lor beating or cooling. The mold is 

 located in the center of the table and is in two parts which slide 

 horizontally and independently of each other. When the presses 

 are operated simultaneously the mold parts are brought together 

 in perfect alignment. 



The core, which is attached to the piston of a vertical hydraulic 

 press operating below the table, has grooves at its lower end 

 that correspond with annular rings in the mold sections. These 

 insure perfect alignment of the core and mold. 



The top of the mold registers with a feed block that is fixed 

 to the crosshead. This block is bored to fit the piston of a 

 vertical hydraulic press mounted on the crosshead of the ma- 

 chine, and aiso communicates with the mold. The rubber stock 

 is placed in the feed block in front of the piston, which forces 

 it into the heated mold. The mold is then cooled, opened and 

 the molded article removed. 



The machine for closing the open end consists of a vertical 

 spindle supported in bearings and driven by bevel gearing and 

 a straight and cross-belt for reversing the spindle. The upper 

 part of the spindle has left-hand threads and the lower part has 

 right-hand threads. Threaded on the end of the spindle is a 

 Ii ron, shaped former. Two toggle levers are pivoted to a 

 loo i collar at the center of the spindle, with their lower ends 

 pinned to a nut threaded on the lower part of the spindle. The 

 upper ends of the toggle levers engage an elastic rubber ring 

 with a hole in its center. 



The ruhber article is slipped over the cone-shaped former and 



