US1181163A - Method of printing photographically. - Google Patents

Description

Patented May 2, 1916.

WTNESSES UNITED STATES rATE oFFroE.

HERBERT MORRIS PILKINGTON, F ARVRNE, NEW YORK. ASSIGNOR. BY MESNE ASSIGNMENTS, TO LITHOTEX CORPORATION, OF NEW YORKv N. Y., A CORPORA- TION OF NEW YORK.

METHOD OF PRINTING PHOTOGRAPHICALLY.

Application led November 1` 1912, Serial No. 729,023.

To all reliant it may concern lie it known that 1. Hmnnnrr Blomus' liiailxtrrox, a eitizen ot' the United States,

and a resident of rverne. Long Island..

Specification of Letters Patent.

Renewed April 1T. 1915. Serial No. 22,194.

spacing as the several designs on the plate. or a ditierent spacing, as ma v be desired, it being only necessari' tor some classes of work with diseonneeted designs. that the eountv of Queens, and State of New York` spacing on the tinal printingl plates be aeeuhave invented a certain new and useful Imratelv predetermined so that the Con-9,-

provenient in Methods of Printing lhosponding designs on the ditterent printino mgmphimpy 0f which the following is aI plates for multiple color work will exaetl; specification.` inateh up or register.

'l`his invention relates to a method of lt has been proposed to photographieallv 65 printing photographically5 and moreparp rint or reproduee a design a number oit tieu|arl \v to printing two or more times tunes on a sensitized 'surface trom a unit upon a sensitized surface a design or dephotographie plate bearing sneh design bv signs formed on a photographie or other means ot' what is known as a step and revplate 'through which light rays may be peat machine. B v means otI sueh a machine. 70 .mlmttmL images ot the design on the photographie In most photo-lithographie work it is deplate are projeeted upon the sensitized surA sirable to have the design of which prints taee in aeeuratel)v spat-ed positions. 1n the are to be made. reproduced a number otl most aeeurate and rapidhv operating step times upon the printing surtaee in order to and repeat maehinesr sin-h as that shown print iotf in'one operation as manv prints in ['nited States Letters latent Number o'reo'pies as possible. 1t is desirable in 1.131.631. tor step and repeat maehine. single eolor or blaek-and-white-printing. to granted on the 9th da \Y ot' Marci-h. 15115.' aeeuratelv square up and spaee the ditt'erupon an application filed bv me. when it 3.3 ent reprmluetions ofthe design or designs is desired to plaee a verv large number ot fi's'tdoseli` vas possible upon the plate in order designs on a sensitized surtaee. it' the mafo utilize as mueh of the printing surface ehine is not rapidl \v operated. the wet.

ossihle. and in multiple eolor work. it plates" used may beeome dr v before th@l is neeessarv tor good work. that the printcompletion ot' the step and repeat oper- 3 iiig plates eaeh hearing a number of reproation: and even it the more expensive dry 85 duetions ot different designs or of eomplates" are used or the maehine operated ponent parts of the same design. one tor with sutlieient rapidity for the use ot `v-wet eaeh eolor. should have eorresponding replates..` the initial eost ot the step and reproduetions oth the designs aeenratelv spaeed peat iuaehine t'or handlingr verv large plates` on them so that in printing from the plates. and the time required in reprodueing the these eorresponding designs will eoineide or design a great number ot times bv means matth up in order that the eolors will blend of the maehine. makes it vasti) more or tit one upon the other to give the .de-` eeonomieal to utilize m v present invention sired'eolor etl'eet. in forming large design plates.

A\l.v invention eousists in a simple. quiek liv means ot nrv new method ot printing and eeonomitl method of |)hotographieallv the designs. the number of reproduetions printing down or reprodueing upon a senof the design mav be doubled in a single sitized surtaee. a design or designs on a exposure with the reproduetionsaeeuratel)v photographie or other suitable plate in sueh spaced. and. as hereinafter pointed out. the manner that the prints trom said plates on reprmluetions ot the designs trom a relathe sensitized surtaee will have an areurate tively small photographitl plate-whieh depredetermined spat-ing. so thatiit the designs |na \v be plaeed thereon bv means of sign on the plate be a continuous one. the the step and repeat maehine ean be print- 'design upon the sensitized surtaee when de- `ed direetlv upon a metal plate ha ving a sen veloped. will appear eontinuous and unsitized surt'aee whirh mav then be de- 105 broken as on the plate trom whieh it was veloped. rolled up. and ett-hed. as is well printed: and il'V the designs on the plate be understood in the art. so as to be transspaeed apart or separate. the reproduetions4 formed direetlv into a printing plate: of the design-bearing plate upon the sensiwhereas. in the step and repeat maehiue it tized surtaee mai have e\'aetl v the same would be more desirable and better praetiee 110 (usually a negative) bearing a design or de- Y signs which are to be reproducedrand having suitably spaced register marks formed thereon, and I place in a suitable printing frame. a plate of metal. stone or glass having a sensitized surface upon which the de` signs are to be printed, and uponv this 'I place the photographic negative plate and expose the same to a suitable source of light while protecting from light'rays'the part of the sensitized surface not covered by the negative. I then render visible rthe register marks reproduced'on'the sensitized surface adjacent the unexposed portion thereof, orif such marks are' visible b'i'itfnot sufficienttvso to be plainly seen'through-the. negative plate, I render therriinore Iplainly visible. and then b v meansfof'sa'izd visible marks and the marks on the'fother'end'of the negative plate, I place the negativeolatel upon the adjacent unexpos'ed'part o the sensitized surface witli said registermai-ks on the negative plate registering 'withthe developed register marks on th'eflsensitized surface; and I then make asccond'exp'osure while protectingr from light ays'the pre`v v iou'slyl exposed portion'k of the sensitized surface'v and the. remaining unexposed-'portions, if there be any, and so von',"ea'ch time accurately placing the negativeplatel upon the sensitized As iirface by means of :the-register marks on the plate and the 'visible register marks on'the' previously exposed pori tion ofthe sensitizedsurface.' Inthis way as large a printing surface s'de'sired'may be very rapidly and economically drepared with the different reproductions vof 4the vdesigns most accurately spaced thereon.

In the present manner ofp'ra'ctisingthe invention, thesensitized surfaces used are of such a character that the portions'of the sensitized surface exposed to the light rays will, after exposure,;havea Vfaint orange color, so that after an exposure ofthes'en'sitized surface through the negative plate, the portions of the designs and the register marks through which' the light vrays have been transmitted, will be faintly visible but not sufficiently visible to be accurately detected when viewed through the negative plate for the purpose of placing said plate in its next position on the sensitized-surface; and in order to render certain of the register marks more plainly visible or, in other words, to develop them, a little lithographie ink is applied to the marks, which are then wiped with a moistened brush or the tips of the operators fingers, whereupon the ink will be removed from the portion of the sensitized thereon without further treatment. 'thus be seeirthat. with the use ofisome sensurface surrounding the marks which was notcxposed to the light rays. thus leaving the register marks black andfplainly visible. lt isproliable that with some sensitized surfaces the register marks will not appear visible at all to the naked eye. after exposure: but the portions of the sensitized siii'- face which were covered by the marks on the negative plate may be suitably treated, as is well understood in the art. to` rendei' said marks visible. If the sensitizing solution used is one containing one or more of the haloid salts. the register marks on the sensitized surface. upon removal of the neg ative'platc after exposure. will appear sutliciently visible for the purpose of matching 'I the register marks of the negative plate It will sitizing solutions. it ma)v notbe necessary to treat' the register marks to develop 'or bring them -out:V but wherever in the ap-l pended claims -I have used the word de-l velop or.developinmI wish to be understood asmeaning Ithe treatment of invisible marks on the sensitized surface to develop them or render them visible, or ,the .treatment of faintly visible register marks to develop themorwrender them more plainly visibles-d :fx a;

I have found'in )ractice that it is preferable, in forming -largeprinting plates, to make, by-means 'of a step and repeat machine a photographic negative plate bearfv ing a Certain number of 'reproductions ofithe design and with-register marks thereon, the number of reproductions thus formed oir-the negative platedepending upon the size of the designsbeing reproduced and the final number desired; and to then use the photographic negative thusformed as a photqL graphic design-bearing plate, and print fromthis relatively small negative plate upon thev final sensitized metal or other surface in accordance. with my presentfinven; tion. The final plate may then be developed. rolled Vup and etched to 1transform it into a printing surface. A suitable machine for carrying out my invention as now practised isshown in the accompanying drawings,fin whichgf,

Figure 1 shows a printing frame lfor receiving the sensitized surface and the photographic plate; Fig. 2 is a sectional elevation taken on line 2-2 of Fig. 1 and showing frame; Fig. 'sh'ows a zinc plate `in the course of preparation with two impressions from one negative, and with the negative in position thereon: and Fig. 4 shows a zinc plate having two impressions thereon from a photographic plate bearing a continuous design.

The printing apparatus consists of a suitable box 1, the bottom l of which forms a suitable vacuum pump connected tothe l a support in which the sensitized printing plate '3. preferably of zinc. and the photographic plate or negative l rest. rl`he box is provided with a pad of rubber 5 having a rubber beading (waround its edges. and a suitable framing piece. 7 and a sheet of glass S fit within the box vso as to hold the sensitized surface and the negative in place. The frame is supported in any convenient inanneif and preferabliY on triinnions 9 so that the frame inav he swnngin different positions.

The negative plate l has a number of reproductions of a unit design 10 thereon. and

suitable register marks ll-ll which are preferably formed photographicallyfon the plate in the stepping,r and repeating of the unit designsthereon. lThis negative-plate.`

say of-half the size of the desired printing surface.V is placed in'tlie printing appi'iratus' 1' on'top 'of the sensitized surface ofthezinc'- platef'which Irestsv upon the rubberblanketii The poi'tion off-"tlie'sensitized "surfacemotf' covei'edjby 'the negative plate isthen corl ei'ed"by a suitable opaque' mask 12,"fand 'the v framing'pie'ce/i' 'with the glass 'plate' 8 is then placed in position in the frame so that i" its edges` rest on 'the beading G of therubberl pad; fand'itlis fastenedin position bysuit-' ablecatchesa'l.I A.' suitable tubei 14' con!) ii'ects the'space between the rubber blanket.

and th'ef'glass plate S with a' vacuum pump 1,5 by'means' of :which air is exhausted -fi-oi'ii" i betweenE theriibbei' pad and the glass' plate.

therebyl causing the rubber'padg-fthe zinc plate', thenegative and the -yglass plate 'to'- p ybe firmly pressed together. andI the'negative vand-zinc plate lto'A be, held securely inf posi fclie "sensitized surface has been suflicientlj' exposed, the light is shut off from theprinting.T frameand thel fia'me is opened andthe f negative Aandv the mask removed. "The two rcgistermarks 16' now printed upon the sensitizedsurface from the register marks 11 of the negative plate. may,` with the rest of the design, appear in a faint orange toneg? whereupon tlieoperator moistens -his .fingei'f ora brush with lithographie ink. and'daubs` iton'tlie marks. and then moistens his :finger:

with water and daubs the niark again. wliereupon the ink is removed from the unexposed part l'oftheplate and the `niark is rendered bla'ck so Ithatit will be plainliv visible through thenegative plate. The negative plateis then placed over the unexposed portion ofthe sensitized surface with its register marks 11 registerimgr with the developed register marks 1G on the sensitized surface. and the mask is transferred to the former position of the negative plate. whereupon the pai-ts are again clamped in position and a second exposure made.

1t will be understood that it is immaterial to my invention whether a mask be used to protect the part of the sensitized surface not covered b v the negative plate. or the source of light be so arranged and projected as to be confined to the negative plate, or the uncovered portion. of the sensitized surface protectedin any-other suitable manner now known.

It will be observed that in Fig. 25. the spacing between the two 'reproductions or prints from the negative plate is greater than the spacing between the several designs of the. negative plate, while in Fig. J.. it will he observed-that the design is continuoiiswithout any break therein: and from these drawings it will he apparent tliatl-thev spacing between the two reproductions of theznegative .platemay be made equal 4to the.' spacingsbetween the several designs of the-plate, or made different therefrom "as-desired. z But inlall cases, the two or more reproductions will have an exact l'ii'edeterinined spacing, so that in different plates ".thus :made for multiple color work. the corresponding reproduced units will register one with the. other.

"hilefl 4have described my invention using a negative photographic plate with the designs formed thereonphotographically, it will-be obvious'that in v invention may be practised withgany .plates having one. or more designs placed thereon by any suitable register marks photographically or otherwise formed thereon s0 long as the register marks will'be reproduced on the sensitized siii-face with the design from the plate.

l Having thus described in v invention. what I claim as new and desire to secure by Letters Patent, is:

'1. The method of photograpliicall)y printingfroni a design-bearing plate two or niort` tiines upon ar'sensitized surface the design or designs on said plate.l which comprises placing. in front of a-portioii of a sensitized surface aV design-bearing plate through which light rays'ma'v be transmitted and having register marks oii different portions thereof. makinga photographic print of said design or designs andlregister marks from said plateonto the sensitized surface. placing the plate in front of an adjacent portion'of the sensitized surface and adjusting the plate and sensitized surface relatively by the registration of certain of the register marks` on the plate with certain of the marks printed on the sensitized surface from the plate. and Athen making another print from the plate onto said sensitized surface.

2. The method of photographically printing two or more times` upon a sensitized surface from a design-bearing plate the design or designs on said plate, which coinprises plat-ing` in l'ront of a portion ol' a sensitized-surlaee a transparent design-hearing plate having register marks near opposite ends thereof. making a photographie print ot' said-design or designs and register marks l'rom said plate ontolthesensitized sllrl'aee. while proteeting from light; ra'vs the portion Ull the sensitized sllrtaee not rovered h v the plate, developingaeitain ol' the register marks thus printed on the sensitized surlaee from the register marks near one end of the transparent iplate. plaeing the plate in front of an atljae'ent--portiou. of the sensitized surfaee and :uljustiugthe plate and sensitized surfaee relatively liy the, registration of eertain of'the registeranarks near-one end of the plate with tfhe develojwd,r register marks. and thenfmakiug 4asee',ond

print from the plate. onto the-sensitized sur-U (itl fat-e whileprotettiug from Vlightazrays fthe `portion of the sensitized surfaee, not eovered. h.\tl.u"l late. ,1 'f' i f *l f i printi ing sueeessivelv. upon ditferent vptntions of'v a sensitized sui-fare a'designor,designs-of a photographie plate having register marks at opposite ends thereof. whielL'comprisesplaring the photographie plate-.upon a porf tion ofthesensitized surfa'ee.andfmakingl'ap `fare the register marks on the'photographie.

plate opposite the end from whieh the Vnatehing marks on the 'sensitized surfaee lwere printed. and then ma kin.r a seeond photographie print of the designer designs upon this unexposed portion.of; the, sensi, tized surfaee while proierting fromffinfther exposure the portion of the sensitized sur-` fare -previousljV exposed. i i

l. The .method of printing designs two. or more times upon a sensitized surfaee. to he developed into a direet printing surface.V whieh romprises plaeing upon a portion of a sensitized surfare a negative photographie plate with one or more reproduetions of the design and with register marks.photographieall v formed thereonmaking a photographie print' of said design or designs and register marks from said plate onto the sensitized surfaee of the plate to he developed into a direet printing surfaee ,while proterting l'roni light ra \'s the portion of the sensitized surlare not rovered h'v the negative i plate. developing eertain of the register marks thus printed on the sensitized surtare from eertaiu of the register marks of the negative plate. plaeing the negative plate on an adjareut portion of the, sensitizedl surfaee and adjusting the plate and sensitized surfare relatively lrv the registration otlrertain of the register marks of the4 plate with the developed register marks ou the sensitized surl'aregand then making a serond print from the negative plate onto the sensitized surfarev while proteeting from light vrays the portion of the sensitized surl'aee not'rovered yh v the plate. y

5..;'l7he I net'hodof photographieall printingsueeessivelv upon ditlerent portions of a sensitized surfarea` design or designs of a photographie..plate having register marks at; opposite ends thereof. whit-lrkeomprises plaringrthe photographie plate upon and in dire. et .rontaet :with a portion of the, sensitized jsurl'aee.jjiroduriug a vaeuum hetween the sensitized su-rlare and the photographi(- plate to hriug them into dirert eonlart and holdxt-hem frourrelative movement. exposing to liglit-raj'stlle portion of the sensitized surfare thus eoveredlrv the photographie plate to make a pl'iotographie print of said design (Air-designs and register marks from saidplate ontol the sensitized surfaee while proteeting -v-fronmexposure the portions of the sensitized;surfaee not eovered h v the plate., developing the register marks thus printed on the sensitized surfaee adjaeent anV unexposed portion thereof to he next' printed upon. .plaeing the photographie' plateaipon the a'djaeent unexposed portie of the sensitized surfaee and adjusting it. in position thereon with respeet to the previous printthus made. h v matehing upon the register marks thus developed the register marks at- ,the end of the plate opposite thevenes froln whieh the developed marks were printed. and-againvproduring a vaeuum hetween the sensitized surfaee and the photographie plateto hold them into divert eontaetland fromrrelative movement. and photographiealljvsprinting the. design or designs from the plate ontothe portion of the. Sensitized sui-fare rovered liv the plate while proteeting from exposure the other portions of the sensitized surfare whit-h have. heen previouslv exposed o are to he exposed.

ln testimony whereof` 1 have signed my name to this speeilieation. in the presenee of two snhserihing witnesses.

HERBERT .'llORltlS llhlUNGTN. \Vitnesses:

.\. M. llxYwxim. llxnorn ll. `qtxnroxs.

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