December i, 1906.] 



THE INDIA RUBBER WORLD 



89 



THE "V. D. K' RUBBER TAPPING KNIFE. 



GRADES OF WASTE RUBBER. 



NO detail connected with the crude tnibber interest, 

 wlictlier based upon forest resources or planted trees, 

 is of more importance than the method of extracting the 

 latex, since without good practice in this regard not only is 

 the yield limited, but the life of the trees shortened unnec- 

 essarily. Two illustrations on tliis page relate to a new 

 rubber tapping knife — The " V. D. K." — patented by Mon- 

 sieur Gustav Van den Kerchhove, a Belgian rubber expert, 

 who has given much study to this subject. The knife con- 

 sists of a steel spike, with handle. At the end of the spike, 

 which is slightly curved, is a 

 plate with .screw, and three mov- 

 able blades with oblique edges. 

 These blades can be regulated ac- 

 cording to the thickness of the 

 bark, and they can be used com- 

 bined or singly, according to re- 

 quirement. In fact, this knife, 

 lieing a combination, does away 

 with the accessory instruments 

 needed in some other systems, 

 since the blades may be used in 

 six diflerent ways, to suit the va- 

 rious kinds of work to be done. 

 The knife can be regulated so as 

 to make an incision in the bark 

 only ; it permits the making of 

 the incision from bottom to top or 

 vice versa ; the use of the two 

 small blades together, on small 

 plants, allows the bark to be 

 cleanly stripped in one cut, which 



THE V. D. K." TAPPING KNIFE. •' , , r , i 



(Combinaiioii of Uie t«o small bark, after the How of the latex, 

 cl:a"> ''suip^efl i'o,'::^cm'.] "■ can be replaced. The large blade, 

 of special shape, enables incisions 

 to be made with ease in the thick- 

 est barks. Simple cuts may be 

 made, or the V shape, herring 

 bone, or double herring bone, as 

 desired. It will be noticed that 

 all the blades, according to the 

 work to be done, can be fixed 

 in the handle in the opposite 



[The single small blade Tor Ihe 

 ^*^3 ' dressing of Ihe incision. 



INDIA-RUBBhR GOODS IN COMMERCE. 



EXPORTS FROM THE UNITED STATES. 



OFFICIAL statement of values of exports of manufac- 

 tures of India-rubber and Gutta-percha, for the month 

 of September, 1906, and for the first nine months of five cal- 

 endar years : 



'nr^HE time has long since passed when worn out rubber 

 -^ shoes formed practically the whole of the material 



used for rubber reclaiming. To-day the rule is not to dis- 

 card, when worn out, any kind of goods containing rubber. 

 .Vt the same time, it may be that the following list of grades 

 of waste rubber handled by Mr. J. Schnurmann, an extensive 

 London merchant in this branch, lately supplied by him to 

 Thk Indi.a. RlHHER World, is much larger and more 

 varied than many persons in the trade have seen. Mr. 

 Schnurmaun's location isDownham Mills, Tottenham, where 

 his business gives employment to 150 workers. The list 

 follows : 



B B. carriage tire .stock. Drab buffer stock. 



Fine red stock. Drab valves slock. 



Crusty stock No. i. New black valve .slock. 



.Automobile tires — with and without beads. 

 Cable stock -prime and second. Toys and balls. 

 Drab and while liose sUippiiigs. Red Codd's rings. 

 Hand stripped vacuums and air brake. 



Hand stripped auloniol)ile tires. Hand stripped water bottles. 

 New mackintosh cuttings — Ivnglisli manufacture. 

 Hand stripped pneumatic cycle covers. 

 Drab hose. Old mackintoshes 



Drab and white stock Prime floating inner tubes. 



Semi floating inner lubes. Knglisli cycle covers with beads. 



Vacuum and air l)rake hose. I-Toating slock. 



Floating surgical stock. Dress shields. 



Floating cycle stripping — hand stripped. 

 Semi floating cycle stripping — hand or acid stripped. 

 .\utomobile tires. Black hose. 



Galoshes. Cu.sliion tires. 



Red insertion. Red automobile tubes. 



Black buffers. Drab in.sertion. 



Red valves. Crusty stock No. 2. 



Solid cab tires. Wireless Dunlop system covers. 



Black valves Black insertion. 



Black matting. Black waste. [beads. 



Pneumatic stock. North British cycle covers— no 



Ordinary red stock. Water bottles with insertion. 



Vulcanized cement waste. Unvulcanizeil cement. 



Reclaimed mackintosh coat cuttings 

 P O. (poor old) Gutta-percha strippings. 



Gutta-percha buckets. Ordinary Gutta-percha stock. 



White waste. .-\niirally fire hose strippings. 



Uncured friction waste. Vulcanite shavings. 



X'ulcanite dust. 



NEW TRADE PUBLICATIONS. 



THE latest catalogue of The Mechanical Ri-bber Co. 

 (Chicago Rubber Works) is written in readable style 

 and well got up mechanically, besides which it is of interest 

 throughout on account of the variet}- of goods so wCTl de- 

 scribed. Not only rubber belting, hose, and packings re- 

 ceive attention, but a great number of articles in molded 

 goods and other specialties. [6"X9-" I4S pages.] 



The Harteord Rubber Works Co., in a booklet entitled 

 "The Supreme Problem in Tires," describe the detachable 

 rim which they have developed so successfully during the 

 past year or two. [3 J^" X 6X". 24 pages.] 



The Wire and Cable Co. (Montreal, Quebec) are sending 

 out a little book, entitled "Electrical Conipounos," which is 

 a handy reference book of dimensions and other details in 

 regard to such goods as they manufacture, including rubber 

 covered wires and cables. [3!-+" X 6". 68 pages.] 



New York-Broadw.vy Rubber Tire Co. (Brooklyn, New 

 York), of which D. D. Martin is general manager, issue a 

 catalogue of solid (internal wire and side wire) and Cushion 

 Rubber Vehicle Tires. [5J4"X8^". 16 pages.] 



