US665955A - Composite electroplate. - Google Patents

Description

No. 665,955.; Patented-1an'. l5. Ism.

` w. c. cLousE. CUMPDSIATE ELECTRUP'LATE. (Anuncian med :m4, 1900*.) (un anual.)

llNiTEn STATES PATENT QEEICE.

WARREN CHRIVILIAN CLOUSE, OE KEARNY, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE CHARLES CRASKE COMPANY.

COMPOSITE ELECTROPLATE.

SPECIFICATION forming part of Letters Patent No. 665,955, dated January 15, 1901.

Original application filed ll ovember 14, 1898,5eria1 No. 696,474. Divided and this application filed January 4,1900. Serial No. 325. (No model.)

To (L7/Z whom, zit may con/cern:

Be it known that I, WARREN CHRIVILIAN CLOUSE, a citizen of the United States, residing at Kearny, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Colnposite Electroplates or Eleotrotypes, of which the following is a specification.

This application is a division of my appli- Io car-ion, Serial No. 696,474, filed November 14,

My invention relates to certain new and useful improvements uin composite electroplates or electrotypes in which the half-tone I5 originals or etchings for illustration are combined with electrotypes of reading matter in the manner hereinafter described. The usual method of preparing electrotypes of this description has been as follows: The electrotype zo of reading matter was first prepared in the Wellknown mannelhereinafter described, but having a blank space the size of the halftone to be inserted. The portion covered by the blank space was then cut away. The

half-tone being much thinner than the electrotype, it Was necessary to back the same with metal to the thickness of the electrotype. The half-tone after being backed was then fitted to the opening in the electrotype and 3o soldered in. This process was long, incon- Venient, and expensive, and in spite of the greatest care the half-tone would work loose during printing, causing delay in repairing and frequently resulting in injury to the surrounding electrotype.

The object of my invention is to overcome the difficulties heretofore existing and to pro. duce an electrotype in which the half-tone and cross-section the mold taken from the parts, as shown in Fig. 2, having the half-tone embedded in the mold. Fig. 4 is a plan viewof Fig. 3, showing in addition the method of preparing the half-tone for the electrodepositing-bath. Fig. 5 is a cross-section along the line 1,1 of the completed electrotype,as shown in Fig. l.

Similar letters refer to similar parts throughout the several views.

In Fig. 2 the type a, the half-tone b, face up, and the base or blank block c, preferably of metal loosely placed under the half-tone to 6o make it type-high, are represented as locked together in the chase d. The back of the halftone before being placed in the form is indented or stippled for aboutone-quarterof an inch along each edge, as shown in exaggerated form at g in Fig. 4, leaving about one-eighth of an inch along each edge unindented, as shown at h in said figure. The reason for the stippling Willhereinafterappear. After being locked in the chase the face of the half-tone 7o may be covered with a film of pitch or similar substance to insure its adherence to the mold and to protect the enameled face of the half-tone during the subsequent operations, and at the conclusion of said operations it may be removed in any suitable Way. The form is then blackleaded to cause it to relieve freely from the molding composition. The form is then molded in the usual way, as illustrated in Fig. 3, in which e des- 8o ignates the metal plate of the mold-oase with the edge guards removed, and fthe Wax or molding composition on said plate, the impression having been taken from Fig. 2, as shown, the half-tone being embedded in and adhering to the molding composition face inward, its face being protected by the pitch or similar substance above referred to. A strip of Wax about one-eighth of an inch in width, as shown at t in Fig. 4, may then be placed 9o along the edge of the reverse side of the halftone over the unindented portion h in order to prevent the depositing solution from reaching or touching the face thereof and to hold the half-tone firmly in the form during the process of blackleading. The mold is then thoroughly blackleaded in the usual Way preparatory to being placed in the electrodepositing-bath; but before being placed in the bath the exposed back of the half-tone should roo .the half-tone.

be freed from black-lead, scraped bright, and preferably a film coating of Wax placed on the back from the indentations inward, as shown at 7c in Fig. 4., so as to make that portion non-conducting in the bath. The entire back of the half-tone could of course be stippled and deposited upon; but I have found that by stippling, as hereinbefore described, the desired security and firmness are obtained. The mold, as described, is then placed in the electrodepositing-bath and metal deposited thereon in the usual manner, the metal forming a continuons and unbroken shell over the form and over the edges of the half-tone to the Wax lm in the center thereof, as shown at m in Fig. 5, entering into the indentations in such manner as to form a perfect union between the electrotype and the half-tone, the two forming practically one plate. If the Wax strip used, the deposited metal Will be nnattached to the half-tone at the edges thereof, as shown at r1. in Fig. 5, as 1l prevents the deposited metal from coming into contact with the half-tone, and in this case it is not necessary to stipple to the VeXtreme edge of The said shell and half-tone are then relieved from the mold, the WaX on the back of the half-tone being removed by any suitable means, such as hot Water and lye, and the shell is then ready to receive the metal backing. The Washing With hot Water and lye perfectly cleanses the back of the half-tone, so that the metal backing may Iirmly adhere to it. The Whole shell may be acidified in preparation for the metal backing, which is placed on in the usual way and finished in the same manner as ordinary electrotypes, the completed electrotype being shownr in cross-section in Fig. 5.

By this method I obtain economically and quickly the perfect incorporation of the halftone with an eleetrotype'of reading matter, as set. forth.

What I claim as my invention is- 1. An electrotype in Which a half-tone or etched or engraved plate and an electrotypeshell are united by the same metal as that of which the said shell is composed, substantially as herein described.

2. An electrotype in which a half-tone or etched or engraved plate and an electrotypeshell are united by the extension around the edges of said plate and over the back thereof of a portion of the electrodeposited metal of which the said shell is composed, substantially as herein described.

3. An electrotype in which a half-tone or etched or engraved plate and an electrotypeshell are united by the extension around the edges of said plate and over the back thereof of a portion of the electrodeposited metal of which the said shell is composed, said electrodeposited metal entering into indent-ations on the back of the half-tone, substantially as herein described.

WARREN CHRIVILIAN CLOUSE.

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