US26467A

US26467A - Island

Info

Publication number: US26467A
Authority: US
Publication date: 1859-12-20
Anticipated expiration: 1876-12-20

Description

S. W. BAKER, OF PROVIDENCE, RHODE ISLAND.

IBLANKET FOR PRINTING.

Specification of Letters Patent No. 26,467, dated December 20, 1859.

To all whom 'it may concern:

Be it known that I, SETH W. BAKER, of

Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Blan- Akets used for Printing Fabrics, and that the following description, taken in connection with the accompanying drawings, hereinafter referred to, forms a full and exact specification of the same, wherein I have set forth the nature and principles Vof my said improvements, by which my invention may 'be distinguished from all others of a similar class, together with such parts as I claim and desire to have secured to me by Letters Patent.

The figures of the accompanying plate of drawings represent my improvements.

Figure 1 is a top view of a portion of a printing blanket. Figs. 2 and 3 are sections ffif the same, showing different forms of surace. A

The endless blanket heretofore and now commonly used in machines for printing calicos and other fabrics, consists of a sheet or band of rubber havin a smooth surface, and it is customary an necessary to use printing cloths called grays placed between the said rubber blanket or band and the white or fabric to be printed, to prevent the coloring matter deposited upon the said blanket by the printing rollers which are wider than the piece to be printed-from iowing back upon and blurring the edges of the white. But the use of these grays is troublesome and expensive as they are employed but once for this urpose and are then bleached into white and afterward printed, thus requiring the keeping on hand of a large stock of grays and printed goods. It is therefore very desirable to avoid the use of the grays and yet prevent the coloring matter from flowing back upon the edges of the print, and for this reason it has often been attempted though previous to my invention unsuccessfully,to use `an elastic blanket alone, without a gray interposed between it and the fabric to be printed, especially as the rubber blanket affords an elastic bearing surface to the rint and one which is peculiarly susceptile to the action of the engraved printing rollers, thereby causing the fabric to receive every line, even the most delicate, from the rollers, with great distinctness.

The present invention, by which I am enabled to use anAelastic blanket and dispense with .the use of grays l between it and the A fabric to be printed, consists in forming a new kind of india rubber orgutta percha or other elastic blanket havingeither `its edges or mar ins, `or the whole of its "surface suliicient yAroughened to prevent A,the ,l

coloring matter received `b printing rollers from running or flowing back upon the edges of the fabric being printed. This enables me also,` assuch1"a blanket can be made without seams or joints to avoid the bad effects produced Ibythe AA A t seams of the Ora s heretofore necessaril used, as herein above sta-ted which consist of it from the AA f strips sewed together, the said seams caus-` ing an impression uponthe print. f

The compositions of which mynnproved i blanket ismade, can ofcoursebevery much varied, but I have found good results, by

using the following: I take 8 `lbs; of'rubber or gutta percha 4L lbs. of zinql lbgof sulfur and lb. of magnesia and mix or grind them together and roll this composition into a sheet 1n any of the modes wellknown by i A f rubber manufacturers, and unite the ends so as to form an endless blanket. The sheet may then be cured or vulcanized in the usual manner. I then form roughened selvages upon the blanket or roughen the whole surface of the same by any suitable means,-` such as by the use of emery wheels or any 1 A other proper manner. 1;The roughened sur-A t face may of course` vary in its coarseness or it may be formed .bylining or by A scoring it, but it should be oflsuch aAnature as to slightly absorb the coloringmatter orsuiii` ciently to prevent the colors `fromf"running or flowing upon the blanket." A y y l l It will be obvious that -my new printing of wall and other pa ers.

Havingthus descri ed y`improveinents,` A `10o` What I claim asmy invention and desire I shall state my claim `as follows:` A

Witnesses:

JOSEPH GAvETT, ALBERT W. BRowN.

yblanket may also be applied `to the printing s.`w.BAKEE. y y