US23987A - Improvement in factitious enameled leather - Google Patents

Description

UNITED STATES PATENT OFFICE.

JAMES w. MUNBOE, or FALL RIVER, MASsAcHUsErrs, ASSIGNOR TO JOHN sournwonrn AND WM. n. MCKENZIE, or SAME PLACE.

IMPROVEMENT IN FACTITIOUS ENAMELED LEATHER.

Specification forming part of Letters Patent No. 23,987, dated May 10, 1859.

T001 whom it may concern:

Be it known that I, As. W. MUNRon. of Fall River, in the county of Bristol and State of Massachusetts, have invented a new and useful Improvement in the Manufacture of Artificial Patent-Leather, of which the following is a full, clear, and exact description.

Canvas or cotton cloth has been prepared by means of suitable oils so as closely to resemble the highly-polished article known in commerce as patent-leather. Where, however, a stout or strong article is required, if a coarse, stronger cloth be used,'tl1e varnish is liable to'break when the material is bent.

To remedy this evil, and at the same time to produce a strong and lasting material, is the object of my present invention, which consists in the employment of two thicknesses of fine cloth, united by a suitable cement, as thefoundation upon which the varnished surface is laid, by which means I obtain a smoother surface, and one that is not liable to crack when bent. Thus a much greater strength may be given to a material of a certain thickness than where a single ply is employed.

To enable others skilled in the art to understand my invention, I will proceed to describe the manner in which I have carried it out.

The cement which I employ for the purpose of uniting the two thicknesses of cloth is composed as follows: linseed oil, one gallon; red lead, one ounce; raw umber, one ounce; litharge, one ounce; the whole to be intimately mixed by boiling. I then add, while hot, the following mixture: two pounds glue dissolved in one gallon water.

The cotton cloth or other material is cut into suitable lengths and receives a coating of the above varnish, which is dried by a heat of 160 Fahrenheit, or thereabout. A second coat is then applied and dried in a similar manner; but before it is quitedry and while quite adhesive a second thickness of cloth is added, the two being caused closely to unite by rolling, rubbing, or otherwise, and the drying is completed as before.

A convenient method of accomplishing the above is the following: Cut the cloth into lengths of twelve yards, or thereabout, and unite the two ends of these strips together, so as to form endless bands or belts, which are then stretched across rollers and are caused to revolve while the cementing composition is applied. Three coats of this composition are then applied to one side of this double cloth, each coat being dried before another is applied. The cloth then receives two coats of the following black varnish, applied in the manner well known to the manufacturers of patent-leather: one. gallon linseed-oil, onehalf pound Prussian blue, two ounces raw umber, three ounces gum-asphaltum, three ounces verdigris. The whole is united by boiling and inspissated to a proper thickness. A material is thus produced which is peculiarly adapted to the uses of the carriagemaker or for water-proof shoes, and which is of far less cost than patent-leather, to which, in some respects, it is superior.

. Thus far I have spoken of the employment of two thicknesses of material only; but it is obvious that three or more may be employed, according to the strength and thickness re quired.

I do not wish to limit myself to the exact ingredients employed for either the adhesive sire to secure by Letters Patent as a new arti- I cle of manufacture, is-

The within-described artificial leather, composed of two or more thicknesses of cloth united by cementand varnished, as set forth.

7 JAMES W. 1VIUNROE.

Witnesses: I

CHURCH TERRY. B. E. WINsLow.