US2676541A - Arrangement for the printing of forms covered with elastic foil - Google Patents

Description

April 27, 1954 2,676,541

A. BTTNER ARRANGEMENT FOR THE PRINTING OF FORMS COVERED WITH ELASTIC FOIL Filed"Jan. 2, 1952 L ATTORNEY Patented Apr. 27, 1954 ABBANGEMENT yFOR THE ,'.PEII'NTING .0F FoRMs COVERED W133i; nl iesrieren.

Artur Bttner, Heidelberg Germani', assigner @to .rsehneupresseniehrik Alsiieneeesllesiliefi ei'- Germany nemers, Heidelberg; Germain/Q, afeeriwreiien if Applicat'ipn-Jnuarfy 2, 1952, fSelivalNo. 64,405

@laines priority, applieatinn ,.Germaiiy .Merch 2, 1.9.5.1

:9 lalims. jl

.In the relief printing; of printing forms, 'fthe .millliaQture o f which 'inthe usual construction is Very expensive, it is knojwn :to cover a printing form, made of any suitable material, by a tiiin elastic skin and to draw this skin, `which may ,c onsist offfpr instance, a rubber foil, iirm'ly onto the form ley proyijding a negative pressure, so that all contours and surfaces of -the form stand Qut lealy- The'iinpression on thefpaperv'isthen teffected by the inked rubber skin. The sections which, after vthe applicationof the lrubber skin, constitute `the printing g-forrn proper, are laid on a smooth bed plate, vl/hich is fitted 'directly onto .the type 'bed .of a 'high-speed cylinder press, or iinto Vaplaten p1je ss}, so that the fform, lupon Withdrawailrof the gaiif, only has AA-to 'be sealed off Yin an upward direction. iHoweyer, sit is lnot possible with 'these bed plates Mto rprint, in `a single loperation ,form s vwhich also contain, in addition to the Isections to `bejtirinted, type consisting of metal or wooden characters, or oflolock` sections, ywhichare .of n qrmahheight.

An o b'ject Qfjtlie present invention'is to provide .an raIrangernent vlqyrneans jof which it -is possible, simultaneously :to -set Iup *normal metal o r YWood type, or 'typehigh-vprinting'- blocks, with sections kof any suitablamaterialplaced onasbedjplate of suitable jheight, and to vcarry out the printing ithereof'in one operation. A'. flcc'ordi-ng"toi-the"invenftionfthe arrangement uforereliefpifintging by means of 4an'ela'stic skin which -covers the Ppri'ntngfform Yand which is maintained on the latter ibygnegative pressure, consists -of -a chase yfor the io`rm, which Yis closed in afm-tight fashion against the jtypebed,and carries'the foilin airtight'fgashion. *Thechase'isipreferablyprovided onrits-upperjiace Vwith a surrounding groove which `cqrnrnunicates Withthe space enclosedby said. chasel and `which `is covered loy an Aelastic skin, lsaid chase ibeing provided vonA its Aundersidewith afyieldable packing strip. Thisjpackingstrip canbe clarnpediin "a recess jformed in the underside ofjthe chase, thespaee enclosed bythe recess A andithe chase being Aadapted to be 'connected to a source of (pressure vmedium vin orderthat thepacking may eitheribe jpressed ionto the support lgyjproviding a'negativejpressure. or withdrawn into thehase recess' ley-means vof suetion y"air, y"cheflatter opera.- tionbeingfor thejpurpose'f more readily rernoving tnechase. "Due'to the arrangement Yci' tire palririe strip, l-fill .inequalities in ih@ Slieiiorbgare equaiized, yso that by y'the applicaticnpftnewpakine.. strip .by (meeneem. @repressed .ein e stehlen AQf.-fc.Oiripressed eirrisgplaerliareiindilie.lleseibefarebbe air,:l.oe.eied"fbeiweei1iheelesilcslsirreesl ftheiehesetis drewncff.

.The groeve .fermel the ripper frire 0f ille .these .ililis 'retains .elastic 4elriri irl pQSiiiQn :iiriiler 'the actien ,ef 161,1?,riestative pressiireor vele'- uum upon the withdrawal of air'irorn the inter .sneer Qf .the ...Chase seid skin .herrie held .taut .Qver `the form 'in SliQil manner that the contours qfthiforrn stand outin relief fashion. By Vmeans of this arrangement; it is P.QSSible for the rst .time toprint in one operation fa mixed type bed .ef .eliereiere fof .-nerriiel height, type-high prim'- irie jplceks andietterspr pieturelelons. .plaeed on .a .slippers of ,suitable .height .this sooerein :alsolbeineppssible on platen presses.

For a better .understanding dfthe invention Lft 1 5 .andtn shoyvA hoxgv itinianlie carriedintoeiect, `rl.the

l saine zwillnow alge more' fullyidesribed. with refere etotneoiistr 1 the aegorripanyine draw j:herein Figure i is a plan vieu of a corner of a printing 20 chase; 'n

rF.ig11re2:is-si QrpsSfseetien-ethereof; EFigure `3 rissa ,ergss -'section. showing Ya modied @rrengemenvt'and .e ,Figure 4 ,is a section on the line IV-IV lof 25 Figllrefl- Y 'l :The .Cliese ceri-siste lef @entrai .bar ll `which @is smilesedietle tir s S pysupperiiiie liars fwliiehipreieei bevo fiheeeni'relbar line .bars ,landfbeiiie n *y y 4. :fhesupportingpars iiielriiiirierirles with greci/es .d llroimetely .et .the -.1ev.e1 flhetelitralibard end which cerner I.ernstes farmed in z Birrerie-ed iinfiheseerpoves fiheedeefheds ll @of wrecking strip 8.' xA .bQre lfasls :from-ith@ ilQWer face .of theceniral @bar TI `to a th eeeled -liole -iritoiwliieh iS `Screwed la ripple .il arranged .iO prei/idea enneetionto 40 the pressure pipe of a pump.`

zCire `reenter ber l is iorrned .in its upper Aface efwiih A e .ergere 11:2] .fend duets A.or bores 1.3 .extend bed reformed abolsesik. l. minii'nieete fwiihge-Colleeine duet H, soferlsiihe .leiierfeceerdirie i0 rieure f2 .ieeprvided .Wliheip l llliimwhqh thereis .Onnected.lal .heee 'I9 inepto ihesileiien bilieefe .reeiiiim clamped in the chase I-3 by a locking arrange-- ment a-b-c and strip d. This form, for example, may consist of normal metal or wood type letters e and support 2l for embossed printing characters 22, all of which are placed with the chase on the type bed I4, and then covered by v a foil 23 which also covers the'groove I2. By applying a slight positive pressure through III-I I to the space 24 located between the center bar I and the packing strip 8, the packing strip is forced against the type bed I4 and thereby seals off the chase against the type bed to make it air tight. The space enclosed by the type bed- Id the chase I--3 and the foil 23, thus sealed, is then subjected to negative pressure or vacuum by connection I8, or connection 20, so that the foil 23, held by the edges of the grooves I2, conf pletely from the type bed I4, or other support. The foil 23, for instance, a rubber cloth, can then v be removed, and the chase I-3 can also be lifted in known manner from the type bed I4.

For the purpose of withdrawing air from the space enclosed by ther chase I-3, it is possible to employ the same suction pump as is provided on these printing presses for the sheet delivery means, i

I claim:

1. In a printing press for use with an elastic foil, a type bed, a chase on the type bed, a printing character support surrounded by said chase in spaced relation to the inner side of the chase, said chase comprising a central frame bar having an upwardly opening groove on its upper face and a bore for connecting said groove with the space between the inner side of the chase and the printing character support, supporting side bars projecting below said frame -bar to provide a space between the chase vand the type bed, -a exible packing member in said space, a pres- -sure connection on the chase communicating with the inner side of the packing member to expand the same into contact with the type bed.

' ing character support surrounded by said chase in spaced relationtov the inner side of the chase,

the support said chase comprising a central frame bar hav-y ing an upwardly opening groove on its upper face and a bore for connecting said groove with the Aspace between the inner side of the chase and the printing character support, supporting side bars projecting below said frame bar to provide a space between the chase and the type bed, a

-flexible packing member in said space, a pressure connection on the chase communicating with the inner side of the packing member to expand the same into contact with the type bed,

and passageways communicating with the area within the chase and about the type character support to cause a foil to be drawn by vacuum pressure over the printing characters on the support within the chase.

3. In a printing press for the printing of a form releasably covered with an elastic foil, a type bed mounted in said press, a printing form mounted on said type bed', printing characters mounted on said form, a chase mounted on said type bed and around said printing form having the printing characters mounted thereon, means for locking said printing form in said chase, said means being positioned between the form and the chase, an elastic foil covering both said printing form having the printing characters thereon and said chase, positive pressure means for sealing the chase against the type bed, said means being operatively connected to said chase, and negative pressure means for the air-tight sealing of said elastic foil against said chase and said printing form, said means being operatively connected to said type bed and said chase.

4. In a printing press for the printing of a form 7 releasably covered with an elastic foil, a type bed mounted in said press, a printing form mounted on said type bed, printing characters mounted on said form, a chase mounted on said type bed and laterally spaced around said printing form. said chase having on its upper side a surrounding groove, said chase and said printing form having a space therebetween,v means for locking said printing form in said chase, said means being positioned in said space between said printing form and said chase, an elastic foil covering both said printing form having the printing characters thereon and said chase including said surrounding groove, positive pressure means for sealing the chase against the type bed, said means being operatively connected to said chase and including a packing strip on the underside of said chase and adjacent said type bed, and negative pressure means for the air-tight sealing of said elastic foil against said chase and said printing form, said means including means for operatively connect- .said chase with the said space between the chase and printing form, said negative pressure means being operatively connected to said type bed and said chase.

5. In a printing press for the printing of a form releasably covered with an elastic foil, a type bed mounted in said press, a printing form mounted on said type bed, printing characters mounted on said form, a chase mounted on said type bed and around said printing form, said chase having a recess on its underside opposite said type bed, a packing strip clamped in said recess forming a. space between it and said chase, means for locking said printing form in said chase, said means being positioned between the form and the chase, an elastic foil covering both said printing form having the printing characters thereon and said chase, positive pressure means for sealing the chase against the type bed, said means being operatively connected to said chase at the space between it and said packing strip, and negative pressure means for the air-tight sealing of said elastic foil against said chase and said printing form, said means being operatively connected to said type bed and said chase.

6. In a printing press for the printing of a form releasably covered with an elastic foil, a type bed mounted in said press, a printing form mounted and means in the type bed comprising a nipple 75 on said type bed, printingv characters mounted on said form, a chase mounted on said type bed and around said printing form having the printing characters mounted thereon. said chase including a frame bar and supporting bars at each side of said frame bar, said supporting bars projecting |be1ow the frame bar thus forming a recess, a packing strip clamped between the said supporting bars at a distance from said chase and adjacent said., type bed, means for locking said printing form in said chase, said means being positioned between the form and the chase, an elastic foil covering both said printing form having the printing characters thereon and said chase, positive pressure means for sealing the chase against the type bed, said means being operatively connected to said chase, and negative pressure means for the air-tight sealing of said elastic foil against said chase and said printing form, said means being operatively connected to said type lbed and said chase.

7. In a printing press for the printing of a form releasably covered with an elastic foil, a type bed mounted in said press, a printing form mounted on said type bed, printing characters mounted on said form, a chase mounted on said type bed and around said printing form, said chase and said printing form having a space therebetween, means for locking said printing form in said chase, said means being positioned in said space between said printing form and said chase, an elastic foil covering both said printing form having the printing characters thereon and said chase, positive pressure means for sealing the chase against the type bed, said means :being operatively connected to said chase, and negative pressure means for the air-tight sealing of said elastic foil against said chase and said printing form, said means including a'suction means connected to the said space between the chase and the printing form, said space being operatively connected to said chase at the surface covered by said elastic foil and to the type bed at its surface adjacent. to the chase. f"

8. In a printing press for the printing of a form releasably covered with an elastic foil, a type bed mounted in said press, a printing form mounted on said type bed, printing characters mounted on said form, a chase mounted on said type bed and around said printing form, means for locking said printing form in said chase, said means being positioned between the form and the chase. an elastic foil covering both said printing form having the printing characters thereon and said chase, positive pressure means for sealing the chase against the type bed, said means being operatively connected to said chase, and negative pressure means for the air-tight sealing of said elastic foil against said chase and said printing form, said means being operatively connected to said type bed and said chase and including a suction pipe passing through said chase.

9. The apparatus of cla-im 8 including a sheet feeding and delivery means for said printing press and a suction pump connected to said suction pipe, for said sheet feeding and delivery means.

References Cited in the ille of this patent UNITED STATES PATENTS Number Name Date 654,421 Slotmann July 24, 1900 2,060,082 Johnson et al Nov. 10, 1936 2,093,485 Schneider Sept. 21, 1937 2,174,726 Koppe Oct. 3, 1939 2,301,963 Marple et al Nov. 17, 1942

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