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THE INDIA RUBBER WORLD 



[February i, 1906. 



SOME NEW EXPERIMENTAL CALENDERS. 



THE illustrations on this page show new types of calen- 

 ders designed for experimental rubber work and also 

 for practical use in smaller factories. One of the machines, 

 for building up into a slab pure gum or compounded stock, 

 would seem to be fairly important, as much of this work 

 is done, and it is necessary to laj' up tbe plys in such a way 

 that they will be absolutely free from air. This slab build- 

 ing calender is fitted with a drum covered with soft vulcan- 



which considerable pressure can be exerted. In this process 

 the designer advises the cooling of the stock on the plate for 

 twenty-four hours before removing. This is, in the opinion 

 of the writer, a distinct disadvantage where much work is to 

 be done. Nor is it apparent that engraved flat surfaces, where 

 the plates must be duplicated many times, are superior to 

 engraved rolls when one figures economy of product. This 

 type of calender is 6 ■' 14 inches, the pressure drum being 2 

 feet in diameter and placed directly under the bottom roll of 

 the calender. A feature of it is the adjustable table on which 

 the flat slabs are laid up. 



An adaptation of this calender is its arrange- 

 ment for laying up plj-s of stock for the manu- 

 facture of solid tires, and the designer claims 

 that he secures much better results by this 

 method than can be got from the tubing ma- 

 chine. However practical these machines may 

 be, they are certainly interesting and ingenious, 

 and are designed and built by Mr. Arthur C. 



Stpiires, Akron, Ohio. 



* * * 



Another experimental calender, and one in- 

 deed for accurate work where onl}- small batches 

 are used, is manufactured b}' A. Adamson (Ak- 

 ron, Ohio). The machine is excellently finished, 

 the adjustment is absolutely accurate, and many 

 kinds of work which can be done on a large cal- 

 ender can be done even better on this machine. 

 The rolls are 6X 14 inches, of chilled cast iron, 

 cored for steam and water. The rolls run in 

 bronze bearings, and are fitted 

 with cast steel cut gears. The 

 rolls of the mill are of the same 

 size and are identical with the cal- 

 ender rolls. The entire machine 

 is placed on one bed plate, and is 

 EXPERIMENTAL CALENDER FOR SLABBING AND ENQRAviNQ. SO arranged that either mill or cal- 



ender may be run separately or together. The machine is 

 in no way a to}', but is a perfect working practical machine 

 in every detail. 



ENGRAVED PLATES USED UNDER STABBING CALENDER. 



ized India-rubber, one half inch thick, the face being shel- 

 lacked. By its use a slab can be built up to the thickness 

 of 3 inches, the width being 22 inches and the length 6 feet. 

 The designer expects it to be used for such work as heels, 

 soles, valves, and articles are died out and made fit the mold 

 with considerable exactness. 



The double texturing calender, on the other hand, is not 

 intended for other than experimental work. The designer, 

 however, believes that he has brought out something that 

 will result in a new method of double texturing on full s zed 

 three roll calenders. 



The third process demonstrated by an experimental machine 

 is one for engraving and calendering stock flat, for water 

 bottles, shoe uppers, soling, etc. This is done by running 

 two ply compounded stock on long flat engraved metal plates, 

 which are passed under the lower roll and over a soft rubber 

 covered drum, the latter fitted with weights by the use of 



ADAMSON'S EXPERIMENTAL CALENDER. 



•■Nothing Like Leather (?) "—The heavy calfskin knap- 

 sack formerly worn by the German soldier has been condemned 

 by the War office and will be superseded by a light canvas 

 article rubber coated. Another triumph for India-rubber ! 



