USRE8043E - Improvement in rubber articles - Google Patents

Description

H. P. DUNBAR & T. 0. LOTHROP.

Rubber Articles.

No. 8,043. Reissued Jan. 22,1878.

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assimilate with the base and be susceptible of vulcanization.

. rubber, to insure certain assimilation, and

' to be hereinafter explained.

'HIRAM P. Duncan Ann THOMAS C. LOTHROP, OF BOSTON, MASS. i

p .llVlPROVEMENT IN RUBHBER ARTICLES.

Specification forming part of Letters Patent No. 170,941,

dated December 14, 1875; Reissue N0. 8,043, dated January 22, 1878; application filed December 26, 1877.

To all whom it may concern 'Be it known that we, HIRAM P. DUNBAR and THOMAS C. LOTHROP, of Boston, Suflolk county, State of Massachusetts, have invented an Improved Manufacture of Articles from Vulcanized Rubber, of which the following is a specification:

This invention relates to the manufacture of floor-cloths and numerous other articles of a useful or ornamental nature from vulcanized india-rubber, whereby we are enabled not only to' produce figures or designs which shall vary greatly in character or extent with the uses to which they are to be put, but to obtain a product which shall withstand a great amount of wear, owing to its inherent elasticity, and in the end shall be very economical.

Our invention consists in the employment of a base of a cheap vulcanizable compound, forming the body of the floor-cloth or other article, combined with overlaying or inlaying ornamentations or characters, made of a compound of coloring or neutral tint matters, containing suflicient rubber to cause the same to vulcanization, the said parts being united by The drawings accompanying this specification represent, in Figure 1, a perspective view, and in Fig. 2 a section, of a floor-cloth embodying our invention, in which the ornamental surfacing is inthe form of strips of rubber compound in a solid state.

In carrying our invention into practice in the production of floor-cloths, for instance, which is one of the articles we are manufacturing under our invention, we provide abase or body, A, of a compound Ofindia-rubber and other ingredientssay the packing material of commerce, now in general use for packing steam-joints, &c., which is a comparatively cheap product, and yet very durable in wear; and we, preferably, though not necessarily, add to the material of the base A a very smalladditional percentage of pure union of the outer surfacing or ornamentation,

To produce the inlaying or overlaying surfacing which gives ornament and relief to the base A, we employ certain (ingredients or 001- oring matters to obtain the desired color or The ornamental composition is applied to' the surface of the base, so as to produce the desired pattern, as shown at a a. When, as in the present instance, the ornamental composition is sufliciently solid, it may be rolled or pressed into the base, so as to be inlaid therein. This, however, will depend upon the consistency of the ornamental composition and its thickness.

The base or body A, (not yet vulcanized,) with its ornamental surfacing, is now subjected to the ordinary vulcanizing process, with the well-known results of such process.

By the hereinbefore-described method-that is, the employment of a base or body of comparatively cheap material, overlaid or inlaid withcharacters more or less ornamental, which are vulcanized with such base-We are enabled to supply, at low cost, not only a very durable but an ornamental product, and to make available and adapt to many uses in the arts aproduct which has heretofore been in comparatively small demand, and employed mainly for packing. I

A floor-cloth, especially, produced as above described, is very durable, owing to its inherent elasticity, which yields to the impact of objects which rapidly wear out ordinary hard or rigid materials, while we obtain all the desirable'eifects, as regards ornamental figures and colors, of expensive materials.

In conclusion, we would state that we do not confine ourselves to the form, character, or

extent of the outer surfacing or ornamentation which we employ to give efl'ect or relief to the base or body, as this maybe varied to a great extent without losing sight of the gist or in- I tent of our invention, which, as before stated, consists in a base or body of a cheap material, inlaid or overlaid with characters composed of suitable coloring matters and pure or fine rublber, and the whole subsequently vulcan ize Prior to. our present invention the only analogous product, so far as our experience of {extensive rubber manufacture enables us to be acquainted, has been table and piano covers, &c., which have been composed of a thin' sheet of rubber-cloth, first vulcanized, and then ornamented with various designs in ordinary paint, which dries in the ordinary manner, without subsequent vulcanizing. The ornamentations thus produced are only upon the surface, and soon wear ofl'.

By our method of employing a compound of coloring matters and rubber for 'the'ornamentations of the base, and vulcanizing the whole together, we prolong the wear of such ornamentations to an extent that is not possible without passing through the vulcanizin'g process.

We claim as our invention, and desire to secure by Letters Patent of the United States, the following, to wit:

1. A process or method of producing rubber products,- which consists in uniting with a baseor body of comparatively low cost, containing a quantity of rubber, an in g ornamentation of characters of any given material, color, or tint, provided with sufiiei'ent pure or fine india-rubber (or ca'outchouc) to inlaying or overlay- 'enable them to assimilate more or less cornand be susceptible of substantially as and for pur- 3. A floor-cloth composed of a base or body of cheap material, of which india-rubber is a 'componentpart, and an overlaid or inlaid ornamentation, composed of materials to impart the desired colors or neutral tints and a v suflicient quantity of rubber to assimilate with W the rubber of the base, and be susceptible of vulcanization with the latter, substantially as and for purposes stated. 1

HIRAM 1 DUTNBAR. T1108. 0. LOTHROP. Witnesses: F. CURTIS LOUIS A. rm'rrs.

material, containing a quantity of

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