USRE141E - Improvement in the manufacture of india-rubber goods by means of zinc compounds - Google Patents

Description

UNITED, STATES PAT NT OF ICE.

HENRY G. TYE AND JoHN HELM, OF NEW BRUNSWICK, NEW JERSEY.

IMPROVEMENT IN THE MANUFACTURE OF INDIA-RUBBER GOODS BY MEANS OF ZINC COMPOUNDS.

Specification forming part of Letters Pa tent No. 6,066, dated January 30, 1849; Reissue No. 14], dated August 7,1849.

To all whom it may concern:

Be it known that we, HENRY GEORGE TYER and JOHN HELM, of New Brunswick, in the county of Middlesex, in the State of N ew Jersey, have invented a new and Improved Composition of Caoutchouc, Zinc, and Sulphur; and we do hereby declare that the following is a full and exact description of the manner of compounding the same.

The nature of our invention consists in forming a compound of caoutchouc, carbonate of zinc, or other preparations of that metal, ashereiuafter mentioned, with sulphur, which is perfectly elastic, impermeable to air or water, unchangeable in extreme temperatures, preserving its color without bloom, and free from the deadly action upon the constitution and, health hitherto experienced by the operatives employed in the preparation of metallic or vulcanized rubber.

To enable others skilled in the manufacture of rubber and its compound to use our invention, we will proceed to describe the method of mixing and preparing same.

We take, say, fifty-six pounds of caoutchouc, rendered plastic by the usual solvents, or by the combined action of heat and grinding in the machines ordinarily used for that purpose in rubber-works, and gradually add thereto, while masticating, fifty-six pounds of carbonate of zinc, commonly called Lapis calaminam's, and finally mixing therewith three pounds eight ounces of sulphur, the whole to be well kneaded and incorporated. \Vhen we wish to impart color to our composition, as is sometimes necessary in the manufacture of certain descriptions of goods, we add in compounding as much lamp-black, ocher, or other coloring matter as will produce the required result. The mass is then ready to be manufactured into sheets, waterproof cloths, shoes, or'such other articles as may be required. We afterward submit the same to a high degree of artificial heat, from 280 Fahrenheit to 300?, placing such goods in an oven or chamber heated by ordinary fuels, or in a receptacle in which the temperature is raised by steam, continuing them .in that state from two to six hours, according to the thickness or bulk of the articles to be heatedor cured/Vwhich latter process iswell known to all manufacturers of metallic rubber.

.ized combinations.

Ve do not wish to confine ourselves to the wanted, and increasing the samewhen tough- Y ness and ductility only are the requisites. Neither do we at alltimes grind sulphur in with our composition, but soak the gum in turpentine, or camphene saturated with sulphur; or we merely dust the surface of the manufactured article wit-h sulphur previously v to being heated, as abovementioned, and the desired effect will also be produced by introducing the vapor of sulphur, under steam or atmospheric pressure, into the heated chamber in which the goods are placed, all of which matter of detail respecting the manner of introducing sulphur into our composition forms no part of our claim, such method being daily in use by manufacturers .of metallic or vulcantion of caoutchouc in its several varieties with zinc compounds in their several forms, as herein set forth, and sulphur, and in combination with these the submitting our compound to the action of a high degree of heat, the whole being combined and manufactured substantially as above described.

H. G. 'IYER. JOHN HELM.

Witnesses:

R. R. RoLLo, Jr., A. A. SNODGBASS.