280 



THE INDIA RUBBER WORLD 



[June i. 1907. 



29-»49S' Strap for sccuiinf; belting, hose and the like. Armaturen u. 



Maschincn-fabrik Westfalia A.-G., Gelsen-Kirchen. 

 292,521. Irrigating device, of bulb and nozzle, for the colon. Rudolph 



Klemmer, Krumbach. 

 292,576. Inflatable air bed. Ilermann TacRcr and Frau Aug. Kirchner, 



Halle. 

 293.414- Rubber block stamping apparatus for dental purposes. Bcrnhard 



Butter, Berlin. 

 293.781. Pneumatic tire tread with anti-sltpping rivet heads held in a layer 



of rubber. Actiengesellschaft Mttzelcr & Co.. Munich. 

 293,812. Painters' glove, with thumb stall, finger stall, and shield for the 



closed hand. Zeiger & Wiegand, I^ipzig. 

 293,839. Protective device for boring machiius. Williclin Pahl, Dortmund. 

 293,936. Rubber heel protector, secured by a screw in rtctssed casing. 



Ludwig Blunihardt, Darmstadt, 



THE FRENCH REPUBLIC. 



Patents Issued (with Dates of Application). 



369.587 (Sfpt. 10, 1906). E. Campagne. Dismountable rim. 



369,612 (Sept. 11). Zwingelstein. Elastic tire. 



369,644 (Sept. 11). J. P. Poulet. Protector for pneumatic tires. 



369.652 (Sept. 12). W. Christie. Removable rim. 



369.719 (Sept. 13). Zacharias Olsson. Artificial caoutchouc. [This is the 

 "Zackingumnii'' described elsewhere in these pages.] 



361,944 (Nov. 27, 1905). Orange ;.nd Denis. Plastic and elastic material. 



369,680 (Aug. 2, 1906). Mercier. Tire protector, of spongy or cellular 

 construction. 



3^9f737 (Sept. 13). Societe Michelin et Cie. Process and device for 

 mounting pneumatic tires. 



369.804 (Sept. 17). Societe Anonymous des Pneus Cuir Samson. Dis- 

 mountable rim. 



369.738 (Stpt 13). A. Bloch-Levallois. Process of metallizing rubber, 

 rubber fabrics and analogous substances with aluminum. 



369,797 (Sept. 15). C. Claessen. Process for the manufacture of a material 

 similar to ebonite. 



369.818 (Sept. 18). G. Gabet. Hydro-pneumatic elastic wheel. 



369.819 (Sept. 18). P. de Caters. Dismountable rim. 



369,849 (Sept. 19). J. de Pontonn. Repair apparatus for tire tubes. 

 369,814- (Sept. 17). S. Schwarzschild. Improvement in rubber footwear. 

 369,815 (Sept. 17). S. Schwarzschild. Process of manufacturing rubber 



footwear. 

 369,877 (Sept. 18). Chevillard et Kucharck. Vehicle wheel with interior 



cushion of rubber. 

 370,035 (Sept. 26). P. Prache. Spring wheel. 

 370,125 (Oct. i). C. Cadet Fils. Protective envelopes of vulcanized fiber 



for pneumatic tires. 

 370,150 (Oct. 2). H. Eheis. Steel prottctor for pneumatic tires. 

 370,182 (Oct. 3). Societe Pneumatic Harness, Ltd. Pneumatic horse collar. 

 370,188 (Aug. 20). E. Sloper et R. Sloper. Machine for preparing fabrics 



for tire covers. 

 370.200 (Sept. 15). T. Labre. System of repairing pneumatic tirts. 

 370,248 (Oct, 4). H. Parsons. Protective tread for tires. 

 370.346 (Oct. :o). C. A. Shaler. Vulcanizer for tire repairs. 



[Note. — Printed copies of specifications of French patents may be obtained 

 from R. Bobet. Ingenieur-Conseil, 16 avenue de Villiers, Paris, at 50 cents 

 each, postpaid.] 



THE GROWING RUBBER HEEL TRADE. 



"IPHE question "Is the rubber heel going out of use?" is 

 ■*■ answered strongly in the negative by a leading firm pro- 

 ducing these goods. They advise The India Ri-bber World that 

 their trade during 1906 was larger than in any previous year, 

 and that their arrangements for the current year are on a still 

 larger scale. Their letter says : 



"Our business with shoe manufacturers is increasing by leaps 

 and bounds, and in our opinion you can't stop it from growing. 

 Housekeepers and nurses buy what are known as 'Jul'ets' 

 equipped with our rubber heels; they are a hand turned shoo, 

 very easy to the feet, noiseless, and easy to pull on. Slippers arc 

 practically not used at all. These shoes appeal to the average 

 housewife, and for nurses and persons who have to stand be- 

 hind a counter all day they are the most comfortable footwear 

 ever constructed." 



A writer in American Shoemaking mentions that whereas only 

 three or four firms in this country were making rubber heels 



seven years ago, there must be now 40 or 50 manufacturers of 

 them. The older nwnufacturers, he thinks, are doing as much 

 or more business than when there was less competition, while 

 many of those who have taken up the business later appear to 

 have a liberal share of trade. Besides, while some very low 

 priced heels are oflfered, there are manufacturers who are edu- 

 cating their trade to appreciate better grades of heels, which 

 give good service and are generally satisfactory. The trade ha> 

 been benefited by the rise in leather, lessening the difference be- 

 tween the cost of a good leather heel and a good rubber heel. 



The manufacturer is now able to equip his shoes with rubber 

 heels at a cost of only a few cents more than for leather, while 

 he can obtain from the retail dealer 25 cents a pair more for the 

 shoes. The writer figures the cost to the retailer of buying heels 

 and putting them on leather shoes for his customers, with the 

 result of showing a better profit in buying shoes fitted with 

 rubber heels at the factory. These facts are becoming appre- 

 ciated, and are tending to a steady increase in the introduction of 

 the resilient heels. 



Rubber heels can be put on with the regular heel attaching 

 machinery, and they require no edge finishing, polishing or dress- 

 ing, all of which is an advantage to the manufacturer. The bene- 

 fit to the retailer is that he can supply his customers with rubber- 

 heeled shoes without the delay of putting on the heels himself, 

 as was necessary formerly. 



Another writer in the same paper says that the shoes heeled 

 with rubber in the factories are almost wholly for women's wear, 

 very few heels having been used as yet in factories making men's 

 shoes. He refers to rubber heels being worn largely by women 

 indoors. The advantages claimed for rubber heels are disputed 

 by a writer in Boot and Shoe Recorder, though admitting th:it 

 "hundreds of thousands of rubber heels will be sold this winter, 

 and in many winters to come." All of this he attributes to "clever 

 advertising." 



SEPARATING RESINS FROM RUBBER. 



"T^HE British patent of M. Wilderman (No. 20,606 — 1905) 

 ■^ relates to means for extracting the more valuable parts 

 from crude india-rubber. The crude rubber, washed and freed 

 from, albumen, is treated with a mixture of two or more sol- 

 vents, one of which, such as chloroform, benzine or carbon 

 tetrachloride, dissolves the whole of the rubber, while the other, 

 such as methyl or ethyl alcohol or acetine, dissolves resins only. 

 The solvents are mixed in such proportion that the more valua- 

 ble products of the rubber (the a rubber, or the a-f-fc rubber) 

 remain undissolved, while the resins and poorer products remain 

 in solution. The solvents are recovered by distillation, the 

 process being made cylic. The last traces of solvent are removed 

 from the rubber by distillatitm under reduced pressure. 



Works of the Avon India Rubber Co., Limited. 



flmportant ninnufaclmt-rs of tires, at Melksham, Wiltshire, England.] 



