.Mav 1, 1.921 



THE INDIA RUBBER WORLD 



583 



New Machines and Appliances 



THE PERFECTED CALENDER GUIDE 



IN CALENDERING RUBiiEK, cuiisiderahlc aiiiioyaiicc and waste of 

 rubber is caused by the rubber on the roll working under the 

 guide and depositing on the roll bearings where it interferes 

 with lubrication, and l)ecoming impregnated with oil and dust, is 

 a source of trouble to lioth calender operators and repair men. 



Calender Guide in Position 



The usual type of guide consists of a cast-iron holder fitted with 

 a deflector made entirely of wood which is difficult to keep fitted 

 close enough to the roll to prevent the rubber from working 

 under it. Practically all guide trouble is experienced at the first 



CaI.EXTiER (il'ini- IX ( IPERATIOX 



point of contact between rubber on the roll and the guide, or, at 

 what might be termed the "heel" of the guide. 



The perfected patent guide shown in the illustration, is com- 

 posed of three parts, the cast-iron holder, the bronze heel and the 

 wood or metal filler. The holder is practically a duplicate of the 

 common guide holder, extended and arranged to carry the bronze 



heel which does all the work. It is fitted accurately to the roll 

 when first assembled, and is kept in place against the roll by 

 adjusting the set-screw in the guide holder. The \vood or metal 

 part of the guide once in place and fitted to the rolls requires no 

 adjusting, as all the wear is taken by the bronze heel, which is 

 separate from although alined with the wood filler. The wood 

 or metal filler will not damage the roll, as no pressure is required, 

 because it only guides the rubber which has been deflected by 

 the bronze heel. The excessive pressure necessary on the old 

 t>pc guide is entirely eliminated, for the slight pressure nn the 

 bronze heel is insignificant, as the arc of contact is about one- 

 fifth of what was necessary with the old style guide. — Parrel 

 Foundry & Machine Co., Ansonia, Coimecticut. 



A NEW TIRE SPREADER 



An aid to the garage man is the tire spreader shown herewith. 

 It is attached to the wall or a post capable of sustaining a weight 

 of ISO pounds and the weight of the casing. All the sliding rods 

 and working parts are 

 of chrome-nickel steel. 

 The heavier castings 

 are of gray iron. 

 Careful machining 

 and accurate lathe 

 work insure continu- 

 ous operation with 

 freedom of repairs. 



The machine is set 

 for a smaller casing 

 than that which is to 

 be spread. This is 

 done by turning the 

 large wheel in the 

 center. A hidden 

 spring holds all the 

 hooks open and out 

 of the way until a 

 slight pressure returns 

 them to place. The 

 casing is lifted from 

 the floor and suspend- 

 ed from the two top 

 inside hooks. The 

 bottom set of hooks 

 is closed and the whole machine is turned slowly, closing each 

 hook as It comes to the bottom. The larger of the two wheels in 

 the center is turned to the right. This fits the hooks to the diam- 

 eter of the casing. By turning the small hand-wheel to the right 

 the tire is spread open. The action is easy and the time required 

 is less than twenty seconds. There is no flattening of the tread 

 and the spreading takes place where it should — in the side-walls 

 close to the beads, thus facilitating the workman in placing the 

 reliner, removing a frozen tube, or buffing the inside or outside 

 of the casing. — KeHawKe Manufacturing Co., Minneapolis, Min- 

 nesota. 



The KeMawKe Spreader 



A QUICK-LOCKING VULCANIZER DOOR 



A quick-locking door for vulcanizcrs, distinct in design from 

 the types that depend on the action of wedges, broken screws or 

 the bayonet lock f)rinciple, is here shown. 



Both shell and door are provided with inward flanges. A 

 circular steel spring, the most essential element of the device, is 

 mounted in the door. This spring has a groove in which an 

 elastic packing ring is fitted. When closed, a groove in this 



