US874353A - Process of producing matrices. - Google Patents

Description

- NO L 874,353. y PATENTED 1350.17, 19o?.

W. H. WELSH. PROCESS 0F PRODUCIN'G MATRIGES.

APPLIOATION FILED APR, 23,1907.-

, UNITED 'STATES PATENT oEEroE.

WILLIAM n. WELSH, oF coLLINeswooD, NEw JERSEY, AssIGNoE or ONE-THIRD "ro CHARLTON 'n.RoYAL AND ONE-THIRD 'ro JAMES F. GoUNLEY, or PHILADEL- PHIA, BENNSYLVANIA.

PnocEss oF PnoDUcING Harmens.'

To all who/m 'it may concern:

Be it known that I, WILLIAM HIWELSH, a

' citizen ofthe United States, and a resident yof Collin swood, Camden county, New Jersey, ha' e invented a Process of Producing Matrices, of which the following yis a specification.

My invention 'relates to the production of of typed and half-tone matter for books, magazines, and other matter of a similar nature, by the art of printing, and it consists of an improved process of producing such matrices.

My improvements may be best described by reference to the accompanying drawings,"`

in which:

Figure 1, represents a sectional elevation of a combined type and half-tone form illustratin the first step in the process forming the su ject of my invention; Fig. 2, is a similar sectional view showing the next step in the process; Figs. 3 and 4, are similar` sectional views showing further steps in the process; Fig. 5, is a sectional view illustrating the im ression taken from such combined type an half-tone form, which impression is to be subsequently treated in theusual method of making an electrotype, and Fig. 6, is an enlarged view of a portion of Fig. 5, lshowing the electroplated deposit or shell thereon.

The ordinary method of'l makin electro- .types from type matter, is toma e -a wax impression, black-lead. the same, oxidize.

such vblack-lead, place the oxidized impression in the electroplating bath, and when a sufficient deposit is made thereon, strip such lshell from the wax impression, and back and finish the same in the usual manner.

In the making of magazine pages, nearly all of them have half-tone insets, and it has been impossible to secure a satisfactory wax v matrix of the combined type and half-tone form. This is vdue to a number ofV causes,

" amon which may be mentioned the fact :that t e type face stands much higherfrom its body t an the linesof thev half-tone, and

consequently when the latter is in the center of a sheet there is more wax for the half-tone t0 dis lace thanadjacent the ty es and consequent y there is danger of the alf-tone slipping over the wax surface, and of the wax spreading over the types immediately sur-y latented Dec. 17, 190'7.l y

rate/ly electroplated and t e finished electrotype from the half-tone is built in or otherwise combined with the electroplate of the type matter. This practice ismore or less satisfactory for flat platen printing presses, but in all printin 4presses employin curved platens around wliich the printin plates are secured, there is always danger o the serted half-tone block breaking loose from its fastenings and thereby spoiling the work, and in some instances partially wrecking the parts.

I propose to overcome all4 of these difliculties by producing a combined metal and-wax matrix from the-combined type-and halftone page Vform, from which combined metal and wax matrix I can make a single, perfect electrotype in which the half-tone portion, being im ressedin the metal, will come forth with all itslines clean and sharply defined. I can accom lish this result in two ways, which are as ollo'wszAThe type-set page form, indicated at 1, which is to receive the halftone inset 2, is, of course, prepared with a recess or space 3 for the reception of such halftone-which is preferably removed from its block. The half-tone prepared in the usual manner by photographing the original u on a metal plate whichis afterwards etche to ermit reproduction of the picture,'is placed 1n this space in the typed page, and a sheet .4

sav

of relatively thin metal, approximately from 1/32- to 3 /64 inch in thickness, is placed over the half-tone; such metal plate exactly fitting the space left in the typed page in which the shoul be-suiicient to cause the necessary` pressure is employed except 'that it displacement of the met-al of the lplate, to form in the'same the lines of the ha' f-tone. The

form with the half-tone and impressed-metaly rlate'is then withdrawn from the press and 1 he usual Wax plate 6 put over the whole of the same, and then returned to the press and subjected to pressure which forces the Wax against the type as in the ordinary manner, such wax at the same time ickingu the metal half-tone-impresscd p ate whic re'- mains embedded in the waxmatrix, andthen the whole is black-leaded in the usual manner and placed in the electroplating bath. The black-leading, however, need not extend to the metal plate. The other method is to form the metal plate impression from the half-tone, Wholly independent of the type and the formation of the wax matrix; the page. form being built' up so as to provide a recess in the wax for the reception of the halitone then to insert the metal impression in therecess of the Wax matrix, and then to electroplate the combined matrix in the usual manner. The latter method, however, is not as satisfactory as the former, as there is the necessity ci' carefully adjusting the metal half-tone-impressed plate with respect to the wax matrix so that the finished electrotype will have the same level or face. y

I speak. of a metal plate, and there are numerous metals which may be used to receive the impression from the half-tone. ln practice l have employed lead` plates of approximately the thickness noted, and thin sheets of foil.

I claim: y

l. The process of forming matrices for the production of electrotypes from combined half-tone and type' forms, which consists in making a metal impression of the half-tone, assembling the type and half-tone impression in proper relative position, applying the usual wax plate for the type impression while the meta impression is in place, and then apply- Vplate over the ty plate, and then su ing'prcssureY to the waXplate, wherebyr the impressed-metallplate is picked up therewith. Y

2. 'The process of forming matrices for the production of electrotypes from combined half-.tone and type forms, which consists in makmg an independent metal impression o f 3.. The process of forming matrices for the production of electrotypes from combined half-tone and type forms, which consists in assembling the type and half-tone in proper relative osition, making,r a metal impression f-tone vin site, placing the usual wax e and `impressed-metal jecting said wax plate to pressure suflicient to form the type impression and pick up the impressedemetal-plate. 4. -The process of forming matrices for the production of electrotypes from combined half-tone and type forms, which consists in assembling the type and half-tone in roper relative position, placing a thin meta plate over the half-tone, applying` pressure to said metal plate to form an impression of said half-tone, placing a wax plate for the, type in'ipressionover said type and the impressed'- metal-plate while the latter is in place, and then applying pressure to the wax. plate whereby the type impression is formed and the impressedmctalplate simultaneouslypicked up. y

ofthe ha ln testimony whereof, I have signed my name to .this speciiication, in the presence of two subscribing wltnesses.

y WILLIAM H, WELSH. l Witnesses: v l

MURRAY C. BOYER, Jos. H. KLEIN.

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