THE INDIA RUBBER WORLD 



IMakcii 1, \'J>0. 



Air Bag System. 



at tliL- ends of repaired sections of 

 the I read. 



A combination adjustable sec- 

 tional vulcanizer of unique de- 

 sign is made in capacities from 

 one to six cavities, inclusive. It is 

 I'urnisbed with an assortment of 

 adjustable tread and bead molds, 

 to be placed between the movable 

 steam-jacketed side walls. The as- 

 hanged in a few minutes to meet the 



Power Rag Wrapping Machine. 



contact 



sembly of part.'; can be 

 requirements of the work in hand. 



PNEUMATIC TRUCK TIRE VULCANIZERS. 



The introduction of the giant pneumatic tire has opened a new 

 field in the tire repair business, requiring large sectional vulcan- 

 izers. They are made in sizes to fit 6, 7 and 8-inch tires, respect- 

 ively, each vulcanizer equipped with one pair of straight side 

 lieail molds. 



INSIDE PATCH VULCANIZERS. 

 Inside patch vulcaniz- 

 ers ma'le in cne-fourth or 

 one-liflh circle, come in 

 small, medium and large 

 sizes. They are of smooth 

 cast iron, designed for 

 mounting on bench or 

 stand, and have suitable 

 steam pipe connections, 

 valves and pet cocks to 

 release cold air from the 

 form. .^ triangular frame 

 within the supports, to- 

 gether with one or two 

 thumb or crank screws 

 or nuts, provide the nec- 

 essary bandage tightener. 



INNER TUBE REPAIR VULCANIZER. 

 Inner tube repairs are vulcanized under pressure, 

 with a steam-heated plate. 



Adjustable and constant pressure is applied to the tubes while 

 being cured by means of heavy oil-tempered springs, which draw 

 down the swinging levers. A steel nut is placed inside the 

 spring and the handle can be screwed in or out of the nut so 

 that a pressure of six ounces or fifty pounds can be brought to 

 bear on the repair. The adjustment can be changed in an instant. 

 Where solid screw clamps arc used it is difficult to properly 

 judge the pressure on the repair. 

 Moreover, as the gum flows dur- 

 ing the cure, the thickness of the re- 

 pair is reduced, partly lelieving the 

 pressure on the tube patch. This 

 does not occur with the spring ten- 

 sion system. 



AIR BAG SYSTEM. 

 In the air bag system of tire re- 

 pairing, sand bags and wire spirals 

 are displaced by inflatable sectional 

 bags. These air bags are made of 

 fabric and rubber, and at one end 

 have a tube and air valve through 

 which air is forced into the bag. 

 CHINE They come in diflferent sizes — one 



for each size of casing. A machine 

 equipped with air bag molds enables the operator to save time, 

 economize on materials, and turn out a repair that can be 

 guaranteed to outlast the rest of the tire. 



The cross-sectional view of a three-cavity vulcanizer, herewith, 

 shows how the steam is conducted to all parts of the three cavi- 



BuFFiNG Stand. 



ties of the air bag molds. 

 Each cavity is so con- 

 structed that the steam 

 enters at the lowest point, 

 and rises to the highest, 

 avoiding steam pockets. 

 This construction ren- 

 ders all the molds self- 

 draining. By means of 

 reducing shells, various 

 sizes of tires can be ac- 

 commodated in the same 

 mold cavity. 



POWER RAG WRAPPING 

 MACHINES. 



In large plants power 

 wrapping machines are 

 used in preparing re- 

 treaded casings for cur- 

 ing. They wrap much more tightly, more quickly and at less 

 expense than can be done by hand. 



In one type the tire lies flat on a table, and revolves on three 

 rollers driven by two upright feed rollers. There are two other 

 vertical rollers adjustable to the diameter of the casing. A rotary 

 drum, belt-driven, that carries the spool containing the tape, 

 rolls on fiber wheels. One or two spools of tape are required to 

 wrap a tire. The hinged gate of the revolving spool drum is set 

 to the opening in the frame to admit or remove the tire. 



.\ machine of similar construction is buill to be fastened to a 

 wall or ]i(ist It is quickly adjustable to casings of all sizes by a 

 lianrj-\xluel tliat separates or draws together two feed rollers. 



In connection with these machines a power spool winder is used 

 tci roll the wrapping tape ready for use. 



HAND RAG WRAPPING MACHINES. 



The operation of hand rag wrapping is as follows: The wet 

 bandage is lightly wound on its spool and dropped into a re- 

 cessed slot in the frame and the pressure arm released against 

 the bandage. A portion of the bandage is unwound and passed 

 through the guides and once around the tire, establishing an 

 over-lap in the bandage and securing the end thereby. The yield- 

 ing roller arm is clasped about the tire, which is placed on a pair 

 of trestle bars or between two benches, and the machine is rotated 

 around the tire, which causes the bandage to be resistingly drawn 

 from the spool and forcibly applied to the tire. The average tire 

 takes two twenty-five-yard bandages, of course, depending upon 

 the amount of overlap or feed, 

 which is regulated at the option of 

 the operator. 



BUFFING STANDS. 



Buffing stands are made either 

 with column base and counter-shaft 

 and pulleys for the ceiling, or with- 

 out countershaft and base for 

 mounting on a bench. Several types 

 have the spindle extended on one 

 end so that a casing can be buffed 

 with a wire brush without interfer- 

 ence from the belt or column of the 

 stand, while the short end gives a 

 rigid support for a rotary rasp. An emery 

 stituted when desired for grinding tools. 

 TREAD ROLLERS. 



Tread rollers save much time and labor, rolling down the rub- 

 ber and fabric much more effectively than it is possible to do by 

 hand, and insuring a secure repair. The device consists of a frame 

 designed to be mounted on a bench, a concave and a convex roller, 

 operating crank and hand wheel screw to adjust the space be- 

 tween the rollers. 



Tre.\d Rolling Machine. 

 Iieel may be sub- 



