The Boot and Shoe Manufacturers' Assistant and Guide. / Containing a Brief History of the Trade. History of India-rubber and Gutta-percha, and Their Application to the Manufacture of Boots and Shoes. Full Instructions in the Art, With Diagrams and Scales, Etc., Etc. Vulcanization and Sulphurization, English and American Patents. With an Elaborate Treatise on Tanning.

by Unknown

Instead of making this solution of sulphur, I sometimes use the flour of sulphur, or sulphur in fine powder, and incorporate it in the proportion above indicated with the gum when brought to a pulpy mass by any of the common solvents, or when worked by heated cylinders without any solvents, taking care that it is intimately mixed with the mass. Another mode of using the sulphur is to apply it to the surface of the gum after it has been applied to the cloth, or rolled into sheets, causing it to adhere by pressure or otherwise. After which the gum is to be submitted to the action of metallic salts, in the manner described by Charles Goodyear.

The effect of the sulphur in whatever way it may be added to the gum, is to cause it to dry more perfectly, and to improve the whole substance thereof, rendering it much superior to that prepared by any other combination therewith. The subsequent process of curing, or tanning, the surface above referred to, as patented by Charles Goodyear, removes all the odor of sulphur, and is intended to be generally applied to all articles manufactured as above.

What I claim as my invention, and desire to secure by letters patent, is the combining of sulphur with gum elastic, whether in solution or in substance, in either of the modes above pointed out, or in any other that is substantially the same, and which will produce a like effect.

Twenty-second, to Charles B. Rodgers, and E. Arnold, Charlestown, Mass., June 21, 1841. Assigns to E. Chaffee, Cambridgeport, Mass. For manufacturing India-rubber Balls.

Twenty-third, to Sewall Gleason, New York, Nov. 24, 1843. For Machine for making India-rubber Hats.

Twenty-fourth, to Charles Goodyear, New York, March 9, 1844. For India-rubber Fabrics.

Twenty-fifth, to Charles Goodyear, New York, June 15, 1844. For India-rubber Fabrics.

Twenty-sixth, to H. G. Tyer and J. Helm, New Brunswick, N. J., October 9, 1844. For India-rubber Cutting.

Twenty-seventh, to Horace H. Day, Jersey City, N. J., October 12, 1844. For India-rubber Goods corrugated and shirred.

Twenty-eighth, to Nelson Goodyear, Newton, Conn., April 22, 1845. For manufacture of India-rubber.