DE1571809A1 - Two-color lithographic printing matrix, production and application - Google Patents

Description

U.S. 5

τ, u 4. c C14- registered May 10, 1965

Robert S. Storms ^ö

121 Beverly Place ■■ I. 1032

Dayton, Ohio / USA 1 R71R Π Q

LITHOGRAPHIC TWO-COLOR PRINT MATRIX MANUFACTURING AND APPLICATION

This invention deals with lithqg? Aphis brazen printing in the in general and in particular with a two-color lithographic printing process.

The lithographic or offset printing process is nowadays widespread. This printing process generally consists in treating a die in such a way that that a first part of it is hydrophilic or water-attracting, while the remainder is oleophilic and hydrophobic, i.e. oil-attracting and water repellent. When printing, the die only becomes brought into contact with water-distributing rollers that on apply a layer of water to the hydrophilic part of the matrix. The stencil is then brought into contact with ink-distributing rollers which apply an oily paint. These Printing ink only adheres to the oleophilic part of the die, since the oil is in the color of the water layer on the former, The hydrophilic part of the die is repelled either directly or by means of transfer printing intermediate rollers pressed onto the surface to be printed, so that the image is transferred and thus is printed.

Even though the present invention contains variations and improvements of the basic method described above, it was previously only possible with a single die to produce a monochrome print. For multi-color printing, additional stencils are required, one for each Color. · In addition, the printing device must be designed for each die the corresponding number of plate, transfer and printing rollers contain. Apart from the fact that in the previous procedures

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multicolor printing more complex and expensive devices requires, it is extremely difficult to choose the right one between the different colors on the printed surface Ratio and correct application of paper source, paper size, V / cylinder synchronization and others interrelated factors all closely monitored; must be grounded to ensure proper paint application.

The objects of the present invention can be as follows are listed: ■ ·

1. To convey a lithographic process which is able to print two colors simultaneously with a matrix by offering a matrix or a production method for a matrix which is selectively sensitive to differently structured printing inks at different points is. ■ ■ ..; . ·: ■;:. · .., .- ■

2. To offer a lithographic matrix, the first part of which is oleo-hydrophobic, the second part oleo-hydrophilic and the third part of which is made oleophobic-hydrophilic, so that a printing ink of a water-based color and a Printing ink of a different color oil-based can be applied successively and separately to the matrix.

3 · A method and apparatus to provide that operate the two-color lithographic stencil described above. . '

4. A process for two-color lithographic printing too offering, being a single color lithographic printing press can easily be switched to two-color printing.

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5. To offer a lithographic printing process, whereby the performance of any lithographic printing press can be doubled.

6. To provide a lithographic stencil made by means of the Properties of fluorocarbon fulfills the purposes described above.

7 · A method to bdöben, by means of which coated Fluorocarbon is processed to make the above two-color lithographic matrix described to produce.

8. Turn off the water roller part of the conventional offset printing press. .

These and other purposes of the invention will be more clearly understandable to the expert with the aid of the detailed description below together with the associated drawings, in which a code number denotes the same part in all drawings.

Figure 1 is a perspective, fragmentary view, partly in cross section, of part of a die made in accordance with the invention prior to its preparation;

Drawing 2 shows, similar to drawing 1, a prepared lithographic matrix prior to its treatment;

Drawing 3 shows the first stage of a method for treating the die according to S ^ inunr Ί;

Drawing A- shows the die according to the drawing second stage of treatment :;

Drawing 5 zeicrfc a further stage of treatment of the ! • "atrice ^ enafi Zoichnunn: 1;

009834/0200 BAD ORSGiNAL

Figure 6 shows a part of a finished lithographic stencil made in accordance with the invention; and

Drawing 7 illustrates schematise *! a procedure and Apparatus for using a lithographic stencil in accordance with the invention.

In general, the invention encompasses a lithographic stencil and a method of making them such that a first portion thereof will attract all of the inks, i.e., oleohydrophilic is carried out, a second part of it selectively attracts or repels printing inks, i.e. oleophilic-hydrophobic is carried out, and a third part of it repels all colors, i.e. oleo-hydrophobic.

In this context it must be noted that printing inks based on Cl or water can be used here as a pressure medium, but only as an example of one of the methods according to which the invention can be exploited. The p: round-lying property of these two bases used in this invention is that both of a surface (i.e. oleohydrophil) attracted by another (oleo-hydro ^ hob) repelled and selectively attracted or repelled by a third party (oleophilic-hydrophobic) and that they are mutually incompatible or repellent. It understands however, all other bases having the same "properties" are also suitable for the purposes of this invention can be used, be it in connection with the ones listed Subfloors, or with each other, as you wish. With this in mind, the further "attractive", "repulsive" and "selective" terms repulsive "related to or synonymous with the corresponding terms "oleo-hydrophilic", "oleo-hydrophobic" and "oleophilic-hydrophobic" are used, and it must therefore be noted that this does not apply to water or oil bases limited. >

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The matrix is used in such a way that it is brought into contact with two types of printing inks on different bases, and only with one color which, according to its properties, only adheres to the first part of the matrix, while the. The base is incompatible with the base of the second color. The stencil is then brought into contact with the printing ink on the second base, the base of which is such that it adheres only to the second ax of the stencil, the first part of the stencil having this color repels as soon as it is coated with the first-mentioned printing ink. The image is then transferred onto the surface to be printed with simultaneous distribution of both colors .

In drawing 1 appears in accordance with the principles of this invention an unprepared part of the substrate 12, partly in cross section, of a lithographic stencil; the base has an upper part 14, the surface of which at least consists of a substance whose properties make it all colors, repels regardless of its base or composition, provided that the surface condition is completely smooth is. In the etched state, however, is the same surface for all colors regardless of their base or composition attractive. Polytetrafluoroethylene or Teflon (= Hostafion) is an example of a substance with the above-described benen .nJigeiisehaften and is preferred for this invention. The entire substrate 12 can be made from this material or it can be the substance. in a suitable way on a applied or rolled to the usual subsurface, so that at least the surface 14 is made of a fabric with "d-en required properties-exists.-. - '._.- ■■ "---.-

Drawing 2 shows an untreated lithographic matrix which was prepared in accordance with the principles of this invention. The die consists of the. Underground. 1 ^r 2, surface 14a. with; a Reserva ^ estoff 18

00 9 83 A / 0200 t ^;. '¥ w ^ _:

IAD ÖRJQiNAL

It should be noted that, as will be explained in more detail below, the method described below represents only one of several methods of achieving the purpose of this invention, starting from the substrate according to drawing 1. The surface is etched using a suitable mechanical, chemical or other treatment, ζ · Β »by immersion in a chemical substance that attacks the surface (such as sodium metal or anhydrous ammonia in the case of Teflon), or by electronic bombardment (corona discharge in the case of Teflon) ). In the method actually described here, the entire surface 14 of the substrate 12 is preferably etched by immersion in a solution of sodium metal and anhydrous ammonia or by means of corona discharge. The etched surface is then coated with the reserve fabric 18. Although several of the commercially available reserves of fe are suitable for this purpose, a photosensitive albumin "has" been shown to be particularly suitable for this invention. The coating material must have such properties that the coating is soluble in a water solution before exposure, insoluble in the water solution after: 1 exposure, and at least in its insoluble state, water-repellent or hydrophobic and oil-attracting or oleophilic.

The second stage of the process is shown in drawing 3. Sin negative, on the whole with the number. 20, is placed over the die 16a according to drawing "1. The Negative contains a translucent or translucent FeIa in the shape of a "letter" T "while the rest Surface 24 is opaque, so that after exposure of the coating by the light source 26, the layer 18 below of the translucent or transparent panel 22 is exposed and thus becomes insoluble. The rest of the part the layer under the opaque surface 24 of the negative 22 remains, as before, soluble. The die is then

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brought into contact with a suitable solution , whereby the still soluble part of the layer 18 is removed. Thus , as shown in drawing 4, the die 16c consists of the substrate 12, which in turn has an etched, oleohydrophilic surface part 14a and a coated oleophilic-hydrophobic surface part 18 in the form of a letter "T". (In the drawings 4 and 6 the letter "T" is shown raised against the surface of the plate. This representation is greatly exaggerated for the sake of clarity; although there is some elevation, it is not visible and also not by ordinary means measurable.)

Teflon has another property that has been found useful in connection with this invention: By Exposure to ultraviolet rays can cause an etched surface be made smooth. By means of ultraviolet radiation, it is therefore possible to etch areas of the subsurface to destroy, making the ultraviolet irradiated parts smooth and repellent.

In the drawing 5, a second negative 28, the first and second ultraviolet light impermeable fields 50 and 32 and a remaining ultraviolet-light-permeable surface 34, placed over the die 16c according to drawing 4. The opaque fields 32 represent parts of a pattern or other suitable configurations associated with panel 30, as desired. The negative coating according to drawing 5 is then of ultraviolet radiation from the light source 36 for a long time exposed enough to the etched areas of the substrate 12 below the ultraviolet light-permeable part 34 of the negative 28 to destroy.

As the drawing 6 illustrates, this results in a matrix 16d, the first part 14a of which has all of the printing inks

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attractsf or in the case of oil and water inks is oleo-hydrophilic; a second line is · selective or discriminatingly attractive or. in the case of on oil or Water-based on built * paints, it attracts oil-based paints, but repels Wanser-based paints (oleophilic-hydrophobic); the remaining or third part 14 is smooth and repels all printing inks, or it is oleo-hydrophobic.

Drawing 7 shows a method and apparatus schematically to use the die according to drawing 6. When using the die invented here and different ones Printing inks on different bases can be printed in two colors at the same time with this apparatus. The device consists of a Platten_walze 38, which rotates against a transfer printing roller; this in turn rotates against a pressure roller 42. Each of the rollers rotates. in the direction indicated by the arrows. The fabric 44 to be printed is guided between the rollers 40 and 42 in the direction indicated by the arrows. A first and a second ink container 46 and 48 containing a first water-based printing ink and a second oil-based printing ink, respectively are located near the platen roller 38. A first and a second row of ink pick-up and ink distributing rollers "50 and 52 take care of the transfer of the printing inks the containers onto the plate roller 38. The die 16d is attached to the platen roller 38 in a suitable manner.

In operation, the rollers ″ rotate in the indicated directions, the matrix 16d first coming into contact with the distribution roller of the water-based ink 50. Thus, a layer of water-based ink is only applied to the first or oleohydrophilic part of the matrix. This first part therefore becomes oleophobic Since the water base of the paint layer has an oil-repellent effect. \ · 1βηη the matrix then comes into contact with the distributor roller 52 of the oil-based paints, the oil-based paint is only applied to the second or oleophilic part of the matrix Bilanis is then on the transfer printing roller

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- y - _

transfer it simultaneously to the one to be printed Fabric 44- applies * Are the oil and water colors more different Dyeing can be done in two colors in one operation can be printed on any basic color *

It is thus obvious · _i that benpresse by a slight change a Einfarbendrukgerpresse to Zvjeif ar, rebuilt, barren one more dyeing Press twice the performance can yield * if the principles are applied to this invention. The two-color printing is performed in substantially the same Torriehtungen that were required for the Einfärbendrück so far, while the problems dfer Aüftragung be turned different colors or hälbier't »Bar he üb addition kahn ^u ÖIE herkömmliehe. The water rollers of the usual Openset spinning press can be dispensed with if the Teflon roller is only once irradiated with ultraviolet rays.

It goes without saying that the matrix invented here by the dei? The different methods described can be produced * Zürn example * the sequence of operations can be changed by first selectively etching only the desired parts of the substrate, applying a reserve * applying * the desired part of the coated area and exposing it the unexposed part is then removed as usual. This method could obviate the need for the above-mentioned ultraviolet irradiation. The selective etching of the substrate can be done chemically or * in the case of corona discharge etching, by means of a köronäehtladurigsuhdürchligen negativeϊ 'The need for a reserve material and the associated.,. Exposure work can be eliminated. A soluble, oleophilic-hydrophobic layer is applied to or removed from corresponding parts of the selectively etched surfaces of the substrate _; it goes _{without saying}

even ^ that zäBlreiölie .äkiillehö VäriätiSneh in the sense of cited principles possible when using the invention would be; what has been cited externally is an example thought and will enable the experts to do this To evaluate the invention p'rältiscli * It must therefore be understood that the 'practical use of this invention within the scope of the claims asserted in the appendix also differ possible from the explicitly described procedure isti "- ■ ■

The applicant claims the whole series of equivalents in the context of the 'in the appendix asserted Ähsprehei

I have the right to ^:

Claims (1)

1. Dan Terfa & r «» aur production ' -imv Zvmlf arbeumatriKo consisting of Γα lf-ena otufent etellans? Ifiei? GeStstOB surface on mladietens part represents «lower and« α the _% in 'ßlattea state uad. after etching the Obörriäehß, Bceehiobtun ?; rain5 «oteTie cinciss left the aforementioned go-Etst« n Fl & cbe eittele elaes oleophilic lijciroji have substance, vodttrch ßiae üraclüCarbft auf tfassorbaele «Ines step color only on the olco-uyarophilm part of the most precise M-atten liaf In the process, a post-applied printing ink is applied oil-based only on the olco-b.yOlroDhoben part of the above Had stuck that dearly on the flatbed Antnreehifldlichft colors through transfer to sine ku hi— druclc ^ nöc Fläclia printed at the same time BAD OFHQlNAL 00 983 U / 0200 (- 12 Ό 2. Da. "Procedure for 'orsrteiluas" in "r Kit m?>} - j: as sswei ge $ r «nBte * - '? I ^> lÜ8ßlgteeite <" n beetohen <5 from the following ar cr ge & tatan surface on eiaera ött ni.7ie -.> f? t <Bns % l & liter surface layer made of polytet? r & «- chtuni · ', who, ^ called F
llöhtor; ipil.Aöl3.cherj -'Ib «:» In «s IV-ils tier mentioned Albiü & lnaohleht around Bftllchtetßis' seil insoluble things; Bcr'.ihrUii {r d t ginviiTmtB 55c: »icli * ni-t? Inex · water solution, among others the soluble {rebli ^ boson l'eil rla-voti from the grooved plate sä entfertiiiQ U51 on the armored * lojt ^ trafluorattjylon oberflaebi »an orstem anlrenchichtnttn goütetea oleoiqr« »rophilsn. Part of it, a 3v /? olcophll-iiydropboben 7ril heraiustolleix uml a third smooth oleo-hy <Sr *> piK> ben Honttetl 'i 00983 '. / 0200 3 · Sin process aar iferste.lung a lithographic Die with fli that was very tightly white bristshend from JTolnsnden s Production slnor geätatöti überorfläeho on a surface which with a smooth surface »fläehenb-? ocha * fönhoit all printing inks AbotSß and if you have a problem, you can create it all Printing inks g the named on surface by means of nliiea l chen light-sensitive otoffoa of the depending on the loosely fineness; Triple print colors that repel or add to the color, insoluble after B'liohtun ^; Dslichtttßg öines Vorbflstiratfiiim üfcilea ^ go r ^ onennen boschich ! toffes uffl d? Ji8 # lben unlönlich au: aaohen; n dar g «called geäfcat-n surface of ß einsa part of the surface of the ßonanntais Dtatersrunöes ms. make dioaen ^ latt au so clae enteteht a first uabeschiohtefce rough surface which all colors anai = ht that a aweite ge & tfcte and coated Teilflächs arises regards the ink nelolctiv and Dab a third smooth Totlflache r; ntatöht _t repels all -rucltfarban } V / o through dl «? Böruhruns d © s called üxiterisruncjes with a © r first printing ink that applies sewn © printing ink only to the mentioned first part, and the subsequent; Genaoiiten first "Drucltfarbencitetoessen and <7io the gonalled second ¹ Pf ?! Put on the flat, the mentioned "wide printing ink only mentioned on the silo * aweit ο Teütflüohc applies, ao that the printed color of the image on the ^" mentioned background can be applied to a bodruefeend 'surface at the same time. Ö09Ö3A / 0200 _Bm ή ·· A / experienced »or Herstallun-; from a lithographic H & trixo tait more than »wei plusnii ttm consisting of the following levels: g a go & did surface on "INERO l'ntergruad" the case of a smooth Ob'-rflsichenbsßchaffonheit hydro-olsophob is; and nac ⁱ etching hyilro-oleophilic; Coating of the said Obsrfläc'io aittola of a soluble lichtompfinalichen oloophil-hj ^ rophobiin substance, 3er nacfc boli pouch; unlöalloh t / irdj Exposure of a yorbcritiriatcn Tnilee άοε called coated Btoff it tra the same insoluble su stachen \ s der ^ etaton surface: G von! sindootcna e aer »mbonchichtiitsn Ob-'rflDc'ie d« ß separatesn üntoruia make this surface smooth and oleo-hydrophobic, ao da & sin »only © uncoated seeds oleo-hydro« - philic surface ontistoht that an awisite; teätete υΰοά besöhiertero oleophilic # hydjfophobo surface is ont »and that oino third indiscriminate. cut * e smooth oleo-liyörophobe Oborflache Whereby dl © contact aee genannton substrate with an ink on ^ asesrbasie ate genamit "? Druclcfarbo a »Af Wassfirbasia only applies to the mentioned oleo-lgrdrophilo Toil and subsequent contact d ^ B; * sna; nten Grundoe with a printing inks on Clbaoia applies the oil-based printing ink mentioned only to the oleophii-hydrophobic surface so that the printing inks of the image are applied to the! The above-mentioned subsoil will be able to transfer a pressure surface on both sides. ÖÖ9834 / Ö2ÖÖ Verfahr * »* ur ^r > advice rinar lltborjraphieclian tfohrfarbenaatriae alt nohr als ssw ^ i
beeteöeiwV aue folr _; «? Naon Production «iner ätftten? Läc: io lainkfi t <ins on <* 1ηοκ 'J? Ell of a Dnt »Tßrundöo aue elnists BtoJDf the bai sure v * er According to hydrflH »oleopbob is and according to Itsuiig the Uy «5r © ~ oi« ontiil hastens a "normal © rvrciβ © lüslichan ttBpflifcSliehen sweetener _i represents by Π"Iioctane; will \ Bnllclitung Biaö «steno« In ^ e Toils of the above-mentioned high material \ xa the bollchtoteti part uriliSalic-i nu ^ © r gitnelten! Plate eit oinor Li) oun (: ßvincJsca ntfernung Ίο »lüalicb reblir-benon Tf» llee doo genaiui! .- cn !! toffee from the roasted platter so da6 e tmbcJiohiohtetc guiitste '. pilflSßbo ontetcht, äic oleo- let that «ine CMoii'P b« i? ci.iic! iteto ^ e ^ tBtc 'jvilflache «Utetctht» dir ol ** or »hil -: y-irophob irst, and dar A third smooth outer surface root fl ash on the surface the said ITtatt «? arises, u ^ lc ': e ^ is phobic. BATH ORIGINAL 009834/0200 δ, A lithographic Drudmatriee for committing auet a substrate made of a substance which, with a much smoother surface, spreads oleo-hydrophobic surface properties and which has the "delicately smooth surface", oleo-hydrophilic surface structure5 a half-tone part of the surface on the subsurface mentioned there, a frr «t: oleo-hydrophilic: T ^ ilflUoho deasolbon darstolltj and a ^ r oloophil- ^ Qrdrophobic layer on oincr Part of the area is called the "subsurfaces", while the remaining area <3ββ mentioned under {^ runöea a smooth oleo-hyäro The phile third toilet area of the same represents ι iioducrii die (; on ^ .nnte I'atriee three ß © separated Oborflächen » Contains various types of selective color brsiteen. ^BATH 00983 /, / 0? 0 0 7, Bine lithographic printing method for multi-color printing ouch Surface with a mind ο »tone diner surface a »ge * t * m part on dl or gonaiintön Cb arf lache first an oleophilic bydrophobic postpones.> inom swoiten. the eeaaimt # B bulges over the measuring surface Surface a smooth oleo-hydrophilic By which the named Ftetri «· & 3t <si g; etr« nnto parts more contains _for three u »t © r BATH Ö09834 / 0200 3 »Dae Torfob ^ ea δα * gX-lehieitistm OJTfJiatdruoke Ton» w «i aust <5 © r coating ilnor lltho ^ raphlooshöi:?! Atriae olt t · "«? Λϋί10 ©! ιβ nit a * ersfcan Bru ^ fefarbc -uif di «only aa dir f ^ mimatatt oil iO-isy ^ p ! ßftat. «At on <3i ^ 3or eins ^ ehlc'.t su form oloophobic * u m XJrt2clifiirbe on ribasla, 31 © nux in the s iiinnca on ttor goftAnntj> "Tt; tjplze on" ine au bt> i 009834/0200 9 « Bas process of the simultaneous OffeeMiuoke of before« chiod «ntn printing inks, consisting of the following working dayUngeat Coating «Inor lltUogrtphlschtn Matrix · with» rindeatim »a surface made of polytetrafluoroethylene, <5tron @ # ft% Bt« Tüilfläehfl olco-hy ^ rophll, whose «wide area» it fintn etoff brTchlclrt «t let, gives oloophll-hydrophobic properties and the third tulle surface glmtt aod olf> o-liy <2ropbob letf by means of oln ^ .r «advise printing» color on Vaneorbaele, which only advise on the «. T <> ilf Iac Im adheres to the same coating and it is oleophobically su aachenj nachtrüfllche Ceechlclitung said die nlt a "wide ink on Olbasls that toydrophobun oleophilic-only dor called adheres ⁵ IViIflache; libortregunn do.a ssvelforbij-en Bildnire-. · atif of the mentioned Katrise u'if a "area to be printed. 10. Tin © Voi -ichtitn «:. Door color sets -unn · eiasr rotittsesden TIa lithographic »." B-stri * «on dos #« «atiafc6fji valns, vabwi Ήβ ^ naont * f & ^ ri * »a dl« e-iiyi! i? epl »£ iÄ oret · a oloo-. 'j | ^ irophobf »öxlt ^ o ft> ll £ lMh® beGit * t { pinen first «part smaa sssohS ^ sraa ail · der ^ 9j3iuint« & V «lit * which makes the surface of the g90ift * eat «K-itoils · fait #l» «r r «t« »ö ^ raßkfeccbe * ttf tt ^^^ erbfttie in Bisrühjfstae; gtfercwRht \ fires ua the £ 5 «aaimt9 orat * DracW ^ rb © oar on the $ * & ceott mt'lteh part sitaaisnesui ^ tig ^ na Kit d «r £ <m * uurfc« a votJuroh di: berflSßh * ^ r grnaumton iiatri «« «it ft law * t-jruckfBrb · on oilMi «jr5hru» e (jtsbraeht »Was after the office« as «it was the advise Br. * Fcfa * fc including the geaa?, ntr svelt "Drwekfeurfe" oa "" itiai * Slieh auf u! «ilflieti · d * ir and eittca third? ^ 11 xom senbän ^^ ad »it d»? gwuraattn ttanöt ««. arsten unö iw it «i örö» fcf »3rtwi 11 "Hospitable ana ^ d"? fla »« Ine innovation * the bisrla gt far o »! he reveals 00983A / 0200 Blank page