US1051203A - Process of making toned printing-plates. - Google Patents

Description

PL: TES,

MAKIN LIGATIO PROCESS matrix, and the overlay O is embedded into the upper side of'the wax, as indicated in Fig. 2. The frisket and wax are then removed from the form, and the overlay removed from the back of the wax. The wax sheet or matrix lV now having an eveninp ression surface, and uneven back surface, 1s then placed in a suitable chamber, as by placing it face uppermost upon a support.- ing bed B within achase C', as indicated in Fig. 3; and then the chamber containing this matrix W is sealed, as by a top plate A, and into the closed chamber above the matrix W, Fi 3, compressed air or other suitable fluid 1s admitted with the result that the matrix is reversed, that is the type surface of the matrix is pressed back where there were originally recesses in the back of the matrix, until the indentations that originally appeared in the back of the plate (formed by the overlay O) ap earV in the face of the matrix, as indicated) in Fig. 4. The matrix is then removed and its toned face coated with metal,-in any well known Way as by electrotyping,until a shell S is formed thereon, as indicated in Fig. 5. This shell S is then removed from the matrix and placed face downward in a suitable receiver, such as a chase Cz resting on the bed B, (F ig. 6) and a suitable amount of molten metal is poured into the chase C2 above the shell S to back the same and form a printing late of desired thickness. Preferably the ace of the shell is supported during the backing process by a suitably formed underlay U, so as to prevent the face of the shell being distorted in any way during the backing operation, substantially as described in my Patent No. 952,312,0f 'March 15, 1910. The plate comprising the shell S and backing M is then reduced to theydesired thick-y ness with a uniform plane surfaced back, by dressing or planing the back (as along the line m, Fig. 6)-in any Well known way;

and after the edges of the plate are trimmed it is ready for use. I

By properly building up or forming the overlay O, and ultimately reversing the wax matrix in the manner described, the intaglio type or printing face of the matrix (Fig. 4) will be unequal, therebeing depressions at certain points and relative projections at other points. While these projections and depressions are actually very minute they are. nevertheless, suflicient when correspondingly reproducedin a printing plate to cause such variations in the pressure of the paper thereagainst during the taking of impressions that the desired lights and shades will appear in the impressions taken from such late. p It will be observed that when the shell S is formed as described its printing surface, which immediately contacts with that of the wax matrix, will correspond exactly but reaforesaid patent.

versely to the tonedsurface of the matrixffimpression.

It will be noted that inthis'inventionA the toning of the plate is effected by toning the matrix, and that the metal of the plate itself is not treated nor stressed nor strained nor distorted in any way in order to tone the plate.

. I preferably use the underlay U when backing up the shell and planing the plate in order to prevent anyl distortion of the shell by the'heat of the metal .or'pressure, and not for the purpose of toning up the `plate at all; but simply to support the shell and prevent its sagging under the heat and weight of the hot` metal pouredtliereon, Fig. 6, or under the pressure of theY finishing tool, substantially as described in my serves to hold or 'support the shell while it is being backed and-finished and not for the purpose of forming the tones.

If the matrix W', Fig. 4, be made of sultable material the plate might be directly cast therefrom, and the invention would be useful for producing toned plates cast direct from a matrix formed and toned in the manner described.

Having described mv invention whatA I claim is:

1. The herein described process of making This underlayv U only` toned printing plates, consisting in first preparing a tonlng member, then placing matrix-material over the printing surface; then placing the toning member upon the matrixv material and subjecting them Vto pressure, thereby producing an intaglio type surface in the face of the matrix; and depressions in the back of the matrix. corresponding to the projections of the toning member; then reversing the matrix by subjecting it to fluid pressure whereby the recesses formed by the toning member in the back of the matrix are 'caused to appear in the face thereof, and finally forming a printing plate from said matrix ;-said print-ing plate having its printing surface toned reversely to the pre' viously toned face of the matrix.

2. The herein described process of making toned printing plates, consisting in placing a wax sheet over a form; placing an overlay against the back of the wax sheet; subjecting the sheet, overlay and form to pressure, thereby producing an intaglio type surface on the face of the sheet and depressions in the back of the sheet corresponding to the projections of the overlay; then subjecting the matrix to fluid pressure to cause the recesses formed by the overlay in the back vof the matrix to appear in the face thereof;

and finally forming a printingplate from tilt tti

narines said matrix,said printing plete having its tace toned inversely to the previously toned face et the matrixa v 3. The herein described process ot matting toned printing plates, consisting in placing' v a sheet ot plastic material over a print form; placing a toning mei against the back of the said sheet; subjecting the sheet, member and form to pressure, thereby producing an intaglio-surface in thel tace ot the sheet trom the i'orm, and depressions in the baclr thereof from the projections ot the toning member; then reversingr the matrix so that the recesses termed by the toning member are caused to appear in the face ot the matrix; then depositing a metal shell on the toned surface o said matrix; and finally removing said shell and baclring the same; the resultant printing plate having its tace toned reversely to the toned tace et the matrix.

i. 'lhelierein described process ot melting toned printing plates, consisting in preparing an overlay; placing a Wax sheet over the form; placing the overlay against the back ot the wax sheet; .subjecting the sheet, overlay and form to pressure thereby producing a matrixhaving an intaglio surface in its face corresponding to the torni and depressions in its back corresponding to the overlay; then causing the depressions in the back ot the matrix to appear in the tace thereof; then depositing a metal shell on the tace of said matrix; and inally removing said shell .and backing same, the nished printing plate haring its tace toned reversely to the previously toned tace ot the matrix.

'llhe herein described process ot melting toned prinntingr plates, consisting iniirst pre.

paring a toning member: placing a plastic sheet over a form; placing the toning member upon the back ot the sheet, and subjecting the sheet, member and term to pressure thereby producing a matrix having an intaglio sui-tace on its tace, and depressions in its back; then subjecting the matrix to duid pressure whereby 4the depressions originally in the back ot the matrix are caused to appear in the tace thereot;lthen depositing a metal shell on the surface 'ot said matrix; then removing lthe matrix and supporting the surface of the shell on a suitable underlav to prevent distortion ot the toned snrlnce of the shell, and backing the shell While so supported to form 'a plate, said plate having its face toned reversely to the previously toned tace of the matrix.

1. The herein vdescribed process ot makingtoned printing plates, consisting in first producing a matrix, then toning the back oi' the matrix, then toning the tace ot the matrix by making the projections and depressions on its back a pear on its face., then depositing a metal s ell on the toned tace ot the matrix, s then supporting -the toned surface ot' the shell on an underlay, and -nnally backing the toned shell While soY supported.

i'. 'llhe herein described process ot mahn ing toned printing plates, consistin in placing plastic materialv -upon the torni, placing a toning member upon the vplastic material; subjecting them` to pressure, thereby/'forming the material into a matrix having an .intaglio type surface in itst'ace, and depressions in its back; then toning the face ci the matrix by causing the depressions in the back ofthe matrix to apear in the face thereof, and finally forining a printing plate from said toned matrix.;v said printing plate having its printingA snrtace toned reversely to the toned tace of the matrix.

t3. the herein described process of making toned printing plates, consisting in placingA plastic material lupon a term;

lplacing a toningmember over the plastic material; subjecting them to pressure, thereby converting the material into a matrix having an intaglio type snrtace in its tace correspondingto the tace of the form, and depressions in its back coiresponding to the projections ot the toning member; then toning the tace ot the matrix b 'clausing the depressions in the back of the matrix to appear in .the tace thereof, and tinally forming a printing plate trom-said matrix; said printing plate having its rintingl surface toned reversely to the toned Iace ot the matrix.

9 'lhe herein described method ot malr-V ing toned printing plates, consisting lin torming a matrix in plastic materialftrom a printing surface, reversely toning the back ot the matrix, then reversingI the matrix by pressure to make the tones ap ear `on its tace, then tormin a metal shel on the toned surface ot suc matrix and subsequently backingwsuch toned shell.

l0. 'lhe herein described process ot mal:- ing toned print-in plates, consisting in first reducing a matrix with toning inequalities 1n its back, then reversing the 'matrix by fluid ressu're to tone its tace, then electrodepositing a metal shell on the toned tace o tllie matrix, and finally backing the toned s el 11. rl`he herein described method ot making tonedprinting plates, consisting in making a suitable plastic matrix, pressing the back of the matrix against a suitable toning surface, subjecting the matrix to Huid pressure to cause the tones to appear in its face, then electro-depositin metal on the toned face of the matrix to orm a shell, and subsequently backing such toned shell to form a toned printing plate.

12. 'lhc herein described process of malring toned printing plates, consisting in first liti ing the toned shell while so supported.

. ing toned printing plates, consisting in iist producing a matrix 'toned on its back, then subjecting the face of the matrix to fluid pressure to canse the tones to appear on its face, then de siting a metal shell on the toned face o the matrix, sup rti shellona reverse niiderlay, and nelly ack- 13. Th'e herein described processof makproducing a matrix, then ton' the back of the matrix, then toning the ace of the matrix by subjecting it to iiiid presure to cause the tones on its back to appear on its face, then depositing a metal shell on the toned face of the matrix, said shell having its printi surface toned reversely to the matrix, an finally backin the toned shell.

14. The herein describe: proces of making toned printing plates, consisting in first producing a matrix, thm ton' Vthe face of the matrix, and thea electroepositin a i shell on the face of the matrix and su qi'ientli` backing such toned shell.- 5

15. he herein described method of maki ing .toned printing lates, consisting in forming a matrix in p ic material from a printing surface, toning the face of the plastic matrix by pressing the sameagainst a theL and d rmions on its back ap Ten depos LNI,

suitable toning member, then electro-depositing -a metal shell on the toned surface of suchV matrix and subsequently backing such toned shell.

16.' The herein described process of making toned printing plates, consisting in llrst producing a matrix, then toning the matrix,

then eiectmdepositing a metal shell on the toned face of lthe matrix, sup rti the toned shellon an underlay, and nally cking the toned shell.

17. The herein described process of makingtoned printing plata, consisting in first lng a matrix, then toning the back o the nntrix, then subjecting the matrix to duid pressure to make the projections r on its face; t iting a metal ll on the toned face of the matrix, removing the toned shell, supporting its face on an underlay, and finally backin thetoned shell.

In ttimony that I the foregoing as my own, I zix my signature in presence of two witnees.

MICHAEL A. DROITCUR. Witnesses:

Emma Haselnuss, Snvm Wins

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