US475534A - Edward s - Google Patents

Description

(No Model.)

E. S. BOYNTON.

- MEANS FOR SURFACE PRINTING.

N0..475,534. Patented May 24, 1892'.

WITNESSES: INVENTOH UNITED STATES PATENT OFFICE.

EDWARD S. BOYNTON, OF BROOKLYN, NEW YORK, ASSIGNOR EDWARD T. WILKINSON, OF SAME PLACE.

MEANS FOR SURFACE-PRINTING.

SPECIFICATION forming part of Letters Patent No. 475,534, dated May 24, 1892.

Application filed February 20, 1890. $erial No. 341,136. (No model.)

To aZZ whom it may concern: ods employed in coating the grained zinc Be it known that I, EDWARD S. BOYN'ION, plates used in zineo-printing; but great and of Brooklyn, in the county of Kings and State marked improved results are obtained by this of New York, have invented a new and usemethod of printing over both lithographic or ful Means for Surface-Printing,whichinventrue stone printing and zinco-printing by tion is fully set forth and illustrated in the means of grained plates. following specification and accompanying In the use of grained plates the zinc is first drawings. given a grained or roughened surface by The object of this invention is to provide means of the sand-blast or otherwise. This I a metallic plate for surface-printing which is necessary for one reason and availed of for shall combine certain qualities or advantages another reason for certain Work. The roughof the lithographic stone not possessed by the ened or grained surface is necessary in order zinc plates usedinzincographic printing, with that the zinc plate shall hold the gum-arabic all the advantages of the zinc plates in addiwhich is coated upon the plate and hardened 15 tion. by phosphoric acid and also that it may hold The invention will first be described in dethe inks of the fatty or saponaceous charactail, and then particularly set forth in the ter used. If the plate be intended to receive claim. 1 the crayon design of the artist made directly In the accompanying drawings, Figure 1 upon it, it must also be grained; but no 2 shows a flat rectangular printing-plate, its grained plate can have imprinted upon it by edges being slightly beveled; and Fig. 2, a transfer the impression taken from a grained curved plate for printing-cylinders. plate.

As this invention pertains to the art of li- The advantages of this invention in the use thography,itwill be easilyunderstood bythose of this alloy-plate may therefore be summed 2 5 skilled in the art by a brief description of the up as follows: Owingto the fine hard porous mode found to be preferable in treating the surface of the plate, which under the microprinting-plates. Said plates can be rolled scope presents the appearance ofafine sponge, from an alloy of zinc and aluminum, the alloy, no sandblasting or other graining is required. as I have discovered, being preferably in the The ink and the gum preparations are held 0 proportion of, say, from four to six per cent. with perfect satisfaction by the porous sur- So of aluminum or about one ounce of aluminum face, and when a new design is required the to one pound of zinc. The proportion may ink and gum may be removed, with but an be somewhat varied, though keeping the obinappreciable amount of metal surface, by the j ectin View of obtaining a fine texture of porsame washing and polishing by pumice-stone,

35 ous metal, which, if immersed in boiling Waas is done in stone-printing, the alloy-plate, ter, will soften and bend to any desired shape, however, lasting a far longer time before bebut when allowed to cool will return to its ing worn too thin for use; but with the ordioriginal state of temperthat is, to a hard nary zinc plate the fatty inks can be removed 7 and sonorous condition. A plate of this metal only by very strong alkali solutions, or all the 40 may be cut to size from rolled metal, as if an grainedsurfaee must be destroyed or removed 0 ordinary zine plate, care being observed to mechanically or by acid before preparing the have its surface free from dross or metallic plate, by regraining, for receiving a new deimpurities. The smooth clean surface should sign or impression. The surface of this alloy then have imprinted upon it with lithographic plate is also always ready to receive by trans- 45 ink the design or lettering required, and the fer a picture or design taken from the origi- 5 remainder of the surface be coated with a nal grained plate on which a crayon-drawing preparation of gum-arabic or other suitable has been made. Of course, if a crayon drawgum and an acid, preferably phosphoric. All ing be desired on one of these porous alloy these details will readily be understood, as plates it may first be grained for the artists 50 they do not differ essentially from the methpencil and the plate preserved as an original I00 or impression plate, and the transfers from it A porous printing block or plate for surmay then be made upon any number of the face-printing, composed of an alloy of zinc and lo smooth ungrained alloy plates and these used aluminum, substantially as and for the puras printing-plates until worn out, the original poses set forth.

5 remaining practically perfect from which to EDWARD S. BOYNTON.

take only transfers of the design or picture. Witnesses:

Having thus fully described my said inven- F. A. BROWER, tion, I claim- H. H. MCGAIL.

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