US1699929A - Color-printing machine - Google Patents

Description

Jan. 22, 1929.

. 1,699,929 A. szABo COLOR PRINTING MACHINE Filed Fb.1s. 1927 4 sheets-sheet 1 Jan, 22, 1929.

A. SZABO COLOR PRINTING MACHINE Filed Feb. l18, 1927l I 4 sheets-sheet 4' /N VEN Toe. HAE/ls 52H50' BWM/mg Y HTToe/vqfs raiearea aan. 22, 192e.

narran srarssrarE-Nr @lFlfFil-CE-Tl tessere' ALEXIs szABo, or CLUJ, RUMANIA, Assienoaor @Nn-FOURTH :To recois sonnent, Y or new Yoann, Y; v 4 i conon-rnrn'rnrey MACHINE.

' Application filed February 18, 1927, Serial No. l,li9,285, and in Hungary June 24,1925. 'i

adjustment of the printing block after each succeeding color, therebyto largely reduce the expense involved in color printing and thus increase the popularity of its usein the production of artistic products. Anotherobject is to provide a color-printing press of lsimple construction and to reduce in this Way the `costs of the machine itseltl thereby Vi'urther contributing tothe cheapness of the products in question.

The process of color-printing is one oi' they most important and hard problems of the printing art-s and though there is a large de- `mand for color-printed products, efforts to solve the problems in a satisfactory manner from a technical and economical standpoint have not succeeded. lt has been already proposed to provide color-printing machines in which a plurality ot printing tables or printing bases, at least as many as colors are required, and of printing blocks, are arranged circumterentially,and in equally spaced positions around a common axis. But in one kind of these machines the printing bases were rotated around the common center to bring each printing base or plate, together with the sheet of paper to'bel printed, into cooperation With the radially movable printing blocks. This arrangement is very unsatisfactory from the practical point of view because each printing base must be, previous to the printing operation, brought in: precise conformity to the corresponding printing block by the most ditlicult and careful preparatory operations (coating and adj ustments) but this conformity being annuled by the next rotation of the printing base towards another printing bloc-k, requiring another adjustment, the arrangement results in useless spotted vproducts especially in ythe case of liner color-printed matters. In another kind of t-he color-printing ma.- chines hitherto known, in which a particular rotatable clamping disc, using as many paper clamping or gripping meansas there are printing tables or bases, is provided for supporting and periodically moving the sheets oi" paper in a circle and from one printing place to the next, the above mentipned disadvantage of the rotation ofthe printingbases could bev eliminated. In ksuoli an arrangement, notwithstanding that the vvprinting bases are raised at each `printing operation toward the above arranged and fixed printed blocks and then lovvered, `this''arrangement has the'disadvantage of further increasing Y the Weight of the printing tables (already being too heavy originally) by additional Adriving partsrbesides, the Whole machine vmust have been constructed stronger and therefore made more expensive on account of the larger masses being moved and. also of thefact that the Weighted printing tablescause a quicker and greaterwear on the corresponding mesh'- ing parts and bearings. This results in the alteration of the above mentioned important adjustment or registering of the printing bases with the printing blocks Which alteration is much more marked than it would be vin the vevent .of `moving the much lighter printing blocks. l clamping. disc having been lifted and ylowered together Withv the-printing bases, the Whole'arrange'me-nt and the driving appar'atus of the machine becomes very complicated and consequently thecosts ot manufacturing oi' the machine are substantially in? creased and the duration of the same decreased. Besides this, frequent interruptions of the operation occur and all vthese disadvantages have prevented the very desirable propagation of machines of this type in practice.

Again, in other types of color-'printing' presses, the printing bases are in a fixed position, an arrangement which is consideredto be advantageous. However, the disc or'rin'g carrying the sheets of paperis suspendedV rotatably upon the-vertically movable ltrame of the printing forms so that the said disc or yring is moved, in addition to its periodical v- Furthermore, the paper the printingbases 131,32, B3 where the sheets are to be printed with the-several colors. A fixed supporting plate G isinounted upon the upper part ofthe central frain'e A andearries the operating rod systein of the printing blocks 0 C2, C3 and the driving ineaiis of the groups of 'color distributing.rollers K1, K2, li, and'of color printing or inlring rollers L1', L2, L3 (see- FigureslA and 5). All ofthe latter rollers-coat the lowei surface of the printing blocks with color and are driven by a coinnion rackAV il (see Figures el, 5 and 8a) guided and raised in a recess aA1 (see Figure of the central franie A itself. The iniddle group L2 of the color print-ing rollers (not shown) is intended to be above the printing base B2. ifi sheet abutinent or .stop J (see Figures 2, 6 and 7) which in cooperation with the side'abutnient S for the lateral limiting of the sheet of paper, see Figures 2 and 9, deterniiiies the required position of the new sheet of paper introduced on the platen Bo. These abutnientsd and S are according to the invention, raised vand lowered automatically, by means of a particular controlling device, to enable the paper conveying wheel D to perforin itsf movement without any obstacle. ySheet retaining bars iet by means of which. the sheet of paper is kept down during each printing operation in known manner, are inoved upwardly after each operation and, according to rny invention, the extent of inovenient is such that said bars R inove out of the path ,of the paper conveying wheel D sothat the latter niuy freely and periodically rotate. The operating device for the bars R are arranged in suitable recesses al (see F iguresv2 and 3) ofthe central traine A itself. Finally, a inain driving niechanisin N, M1, lvl, etc. is inounted adjacent the foot 2 of the inachine 'and is utilized to control and drive the several parts of the machine.. The construction and relative arrangement of all vthe inaiii parts hereinbe fore referred to will'nowbe described in a more detailed inanner:

The annular 'fi-aine B (see Figures l and 2) carrying the platen (paper introduction and delivering table) Bound the printing basesl B1, B2, l, is mounted upon uprights 3 lined on the base plate l ofthe machine. rl'his frainel .is in a tired position during the operation but inay be swung before'the bewinning of the printing oi'ierations to the ri t Vor left 'for the carrying out of the preliminary opera'-k tifons above mentioned. For. this purpose the under side of the franie Pi is provided with rails oi' bars 8 slidablo upon concentric ribs 9 fornied on the upper end of the uprights 3, the annular Vfraine l5 being circuin'ferentially toothed as at l0 to inesh with the toothed riin of the hand wheel i3 (see Figure 3). rlhe latter is provided with a. veitical handle l2 Athrough which the hand vheel inay be rotated in any direction and to any extent at will and thereby the franie B inay be swung in suoli aV way that one or the other of the printingrbases Bl, B2, B3 may be brought into the original place of theplaten B0, as shown in Figure' 2,

in front of which `there is the seat O of the operator, sovthat the coatings of all printing bases inay be changed at thefsaine place without the necessity of the operator-leaving his seat.V At the san'ie'tiine the printing blocks C2, C3 become easily accessible froni b'e- Y Y neatn and consequently the adjustment of the ing out of the 'steps preliminary to the printv ing operation Vthe annular `traine B may be brought into the operating position according to the Figure 2 byl means of the hand wheel 13.

For the purpose of periodically conveying the sheet of paper l provide, as already inentioned, a wheel D (see Figures l and 2) the axis of rotation ofgwhich is forined by th'e'ceiitrai frame itself, the edges of the lattenbeing, for this purpose, conveniently rounded oilaccoi-ding to the forinof the wheel D, as shown in Figure 2. The lower part. of the `wheel D rotatable around this central fraineis formed as a beveled gear 5 (see Figure l) the lower surface of which rests upon rollers 'niounted upon the sides f of the central fraine by ineans of flxed'bearings'so thaty the .wheel l) rolls during its rotation upon these rollei'sto reduce the friction. The beveled gear 5 inesh*` es with a similar gear 7 arranged onahoriZ-ontal shaft- (s'eeFig'ures l and and providedA only in places with teeth i. e. there aretoothed arcs v'alteriiating with sniooth parte rin vsuch a inanner that the wheel D inakes periodically a quarter of a revolution 'to slip the Sheets thein during the printing operation upon the printing base whereupon a further quarter of a revolution takes place and so forth. For

the same` purpose, forins of transmissionl gears, such as a ratchet and ratchet-wheel,

inay be used.

For this'purposethere is vcarried by the upper end of the slide a horizontal plate 14 upon which pins l5, onefor each printing block, are mounted. l forined in the inner end-of a lever 1G rotatable around a shaft- 17 having a fixed bearing mounted upon-a supporting plate Gr Xed upon the upper end 'of the central -fraine A. The outer end of each lever 16 being likewise Each pin V1:5 penetrates 'a slot Cil slotted is connected with a horizontal pin i8 fixed upon a cross bar 22 (see mid upper part of Figure l) which is arranged between vertical rods 19 carrying the frame of the printing block C,l or C2 or C3. The rods 19 being moved inthis way in a vertical direction guided partly in the plate Gr and partly by consoles 2l fixed upon'the'under side of 'the plate G'. A cross frame between the vertical rods 19 is in connection with an eccentriccollar surrounding an adjusting and stopping eccentric Q0, all this in substai'itia-lly knowninanner. By means of this eccentric thel rods 19 together with the printing block and its frame may be lifted independently of the operating device in such a manner that the printing block cannot reach the printing base even in the lowest position of the operated leverlG; in this way one or the other of the printing blocks may be, if desired, taken from the printing operation or the stroke of the printing block regulated at will. This eccentric devi'ce serving for the purpose of adjustments and stopping being well known in other printing machines a further description of the same is not required but it will be noted that the use lof this adjusting device in connection with the machine according to the invention may be, besides, used also for the further event if :in the single color printing, urgent work is to be carried out very rapidly; in such case one of the printing blocks, by means of which one printino' operation is just in the course of completion, may be simply taken ofiv from printing without the necessity of -changing this block and of varying the coatings of the base whereupon the printing t) l L b block according to the new urgent work will be inserted into'one of the free block frames C, or C2 or C3.

The common slideV E is provided at its lower end with a rhoinbic articulated rod system the side articulations 24 of which, or rollers mounted upon these articulations, are actuated for the purpose of raising the slide E by cams e the driving of which will be described later.

i For limiting the position of the sheet of paper to be set, in front of the platen BO, and

, over the surface of the conveying wheel. l),

there are provided, as already mentioned, an abutment .l and side abutment regularly controlled so as to enable the wheel l) to make its quarters of revolution together with thc sheet of paper after the insertion and gripping of the latter. According to this condiion the abutment T is constructedand controlled in the following manner, also as shown in Figure 6.

The proper abutment J consistingof a horizontal bar portion resting upon the platen B0, is carried by a bar 25 bent olf at right angle and branched olf from a vertical rod 26 (see Figures 2 and 6). This rod QG is guided in a recess a2 of the central frame A itself and connected at its lower endwith a link 27 articulated upon atwo-arm lever 28 the bearing of which is mounted upon the foot 2 of themachine. The underside of the outer arm of the lever 28 is-acted uponby a cam j fixed upon the shaft Ml (see Figures 3' and G) while the outer end of this lever is under the action of a spring 29. The construction and the driving of the'cam this driving being described later more particularly, is accomplished in such a manner that always the sheet of paper the printing of which is iinished and which is then carried by the wheel l) fromv the printing base V4B3 to the platenv B, and released as described below, may be withdrawn by the operator each time the left hand arm of the lever 28 is lifted by the cam y' against the action of the spring 29. Thereby the rod 26 is lowered, together with the abutment J, so that thelatter will be resting upon the platen BO and consequently ready for the proper positioning of the new sheet of paper. After some moments during which the insertion of the new paper by the operator and the gripping of this paper by the gripping device F has taken place, the lower portion of the cainy' reaches the underside of the lever 28 causing the lowering of the outer arm of this lever bythe spring 29 and the consequent lifting'of the bars 27, 26 and 25, together with the abutment J, so that the path of the sheet of paper becomes entirely free;

Simultaneously with the control of the abutment J there takes place also the control of the side abutment S, (see Figures 2 and 9) but with the difference that the withdrawal of this side abutment out of the operating position or of the path of the sheet of paper is not carried out by lifting but by lowering below the platen E0. For this purpose the proper side abutment S consists ofl a block mounted upon the upper end of a vertical rod 55, both passing through a slotr 54 of the paper and maybe lined in the adjusted position in any suitable way. c

,The rod 55 .is guided in vertical guides mounted upon the frame of the machine and bent olf at right angle at its lower end, t-he latter carrying a roller 56 which cooperates with a cam s (see Figure 8) lined upon the shaft lli/l1 so that when a new sheet of paper is inserted, the rod :i5-together with side abutment S-is raised by the cam s in the operating position. There, namely shortly before l wheel D is again rotated together with sheet of paper towards the printing base B1, the lower part of the cam s turns under the roller 56 whereby the abutment S and the rod 55 are lowered under the action of a spring or of the weight of the rod system, below the platen B0. y

For the purpose of gripping the sheets of llO paper to be revolved by quarters of a revolution, eachof the four plates d (see Figure 2) arranged in a circle at equal ,distances apart,`

carries a gripping device F tlie'constructioii and control of which are as follows (see Figures 7, 8 and 6).

Eeach .gripping element as such consists j per jaw consists of a twoarm lever articulated on the lower VBetween the two jaws 37, 38 there is a leaf spring 39 having the tendency to hold the clamp constantly inthe closed postion. When the wheel carrying the sheet of paper, the printing of which was just finished, moves away from the printing base B3 and reaches the platen BO, the elongated arin of the j aw 37 comes underneath a roller 32 (see Figures 6 and 7) carried by a bar 30. lThis bar 30 which is bent two fold at right angles see Figures 6 and 8) is fixed upon a vertical rod 33' guided ina recess a3 of the central frame itself (see Figure 3) and connected at its lower. end by a link 34 with a device similar to the controlling means of the abutment J i. e.' with a two arm lever 35 which is likewise rotatably mounted upon the foot 2 ofthe machine. The outer free arm of this lever is acted upon from yunderneath by a kcam f and a spring 36 in such a manner that when the gripping device F reaches the platen B0 the outerfarm of the lever 35 is raised by the cani and consequently the roller 82 is lowered so that the clamp 37, 38 is opened and therefore the operator may withdraw the finished printed sheet' of paper. The gripping device or clamp rests. in some instances in the opened position. Meanwhile the abutment J has been lowered and pressed Y against the platen Bo. 'At the saine time the inner edge of the sheet of paper inserted by the operator toward the abutment J is passing over the free endof the lower jaw 38 of the clamp whereupon the lower portion of the cam f passes bel-ow the outer arm .of the lever 35 causing the lowering of thisvouter arin by the spring 36 and `therefore the raising of the i'oller 32. At this instant the outer end- 3l `of the upper jaw 37 of the cla-nip strikes again, under the action of the 'spring 59, upon the edge of the inserted sheet or paper so that the latter will be gripped. Preferably the upper jaw or both jaws of the clamp are twofold ones (see Figure) so tha-t the sheet will be grippedV at two places by the gripping device. For enabling a free motion of the outer ends of the clamp the horizental bar forming the abutment J is somewhatbent upwards at its central portion as shown in Figure. The cani f, the driving of which will be described later, is fixed upon a shaft M, .coin-mon to the Canis j and 7c.

- The arrangement of the .devices provided for the driving and control of .the several partsv described above, isshown in.y Figure' 3. According to this .figure the shaft of a pulley N placed at the lower end of the frame o f the machine land-.driven from any vsourceof power,` carries a gear wheel l0 meshing" with a gearwheel ll for the driving of the-control shaft M1. From the latter and by means of chain pulleys or strap-wheelslZ, fla" and a j cross chain or strap 4:3 the second. COIltrol shaft .Mm parallel to shaftv M1 is driven.

Upon the control shafts M1, lvl2 thereare .i keyed the opp0sedca1ns.e-`equal'in size' and operating the common slid'eEA (see Figure l) symmetrically for the purpose of'carryingput the printing operation i.v e. for1loweringtli'e printing blocks C1, C5103. Forf'tliis purpose t'hesite articulationsrQ of the articulated rod system 23am pressed inwardly'by 4the projecting portions ofthese cains e whereby v the rod sysiteinwill be moved upwardly and `censequ,ently the slide E raised, whereas Vthe liftingof the printing. blOcks e. tlielpwering of the slide E', during the passing away'of the projecting portions of the camsiefrfln the .Cooperating with `each printing base B1,

B3 pairs of sheet retaining bars it are provided. For the sake of clearness orrly-ogue pair of .these bars is shown in Figure 2. i `Each pair of tliesebars arranged on theside walls of the vcentral traine Amay beelevatedand is controlled in such away that immediately before the printing operation begins, tjlie'bars E fall upontlie sheetof paper and hold it downfor the purpose of. preventingtheadf herence yot the sheet ofplaper'to .the block when raising the latter whereas after the raising of v the printing blockthe, bars .R are swungupwardly to give freel path for the wheel D and the sheet of paper- .nioving again ,through a quarter .of a revolution. Each pair of bars R tral frame A, is mounted for .this purpose upon brackets 5l (see Figures. l() andi'll) i fixed upon theside walls of thel centralfraine whereas allof ,the control rods ofthe sli central frame A itself.v orenabling .adjustment ofthe sheet retaining means according to the. several'lengthsof the sheets 4v.0f paper the cross portions oftliese' barswghich are bent atk right angles, may be formed telescopically (not shown) .so ythat .the distance.

between the twoparallel bars cfa pair may eet vtaining bars are arranged in recesses@`1 of `the in order to have ashereifnbefore mentioned, a 'i swinging arrangement on the sides ofy the cen- .leo

be adjusted at willand the pair `fniedin Ythe 1 adjusted 'positionin anysuitable manner.-

The control deviceV of vthese sheet retaining .bars comprises, inthe fiiist place,l trollianv er 52 acting upon the middle point of the cross portion of the bail-like inner arm 53 (see Fig. 11)- of the pair of bars arranged as a two arm lever, the said roller 52 being carried by an arm 50. The latter is fixed upon a vertical rod 49 guided in the above mentioned recess al and acted upon by 'one or the other of cams r1, r2, or r3 respectively, the cam r1 which operates the rod 49 of the certain sheet retaining device belonging to the printing base B1, being mounted upon the shaft MVVL and the cam r3, cooperating with the pair of bars R belonging to the printing base Bm being mounted upon the control shaft M2, whereas the cam r2 controlling the pair of bars It belonging to the printing base B2 is fixed upon an auxiliary shaft'48, driven by4 the control shaft M2, b v means of beveled gear wheels 46 and 47.

If desired, thev controlling' arms 50 of the pairs of bars R may be connected one with the other by means of a common movable frame surrounding the central frame A for example and provided Vwith a driving lever for example, acted upon by a single controlling cam, by which arrangement all of the pairs of bars R will be controlled by a common cam, of course.

Upon the shaft of the pulley N (see Figure is further mounted the bevel gear wheel 7 serving, as above described, for the driving of the sheet conveying wheel D whereas the end ofthe shaft M1 opposite to the cam S carries a bevel gear wheel 57 driving, by means of a bevel gear wheel 59a, a vertical shaft 58 serving to operate the color distributing rollvers and carrying for this purpose at the upper end a bevel gear wheel 59b (see Figure 5) The meshing with a bevel gear wheel 60. latter is xed upon a shaft 7a2 the bearings of which are mounted upon the above mentioned supporting plate G. Through this shaft 7a, and by means of a spur gear wheel 6l and further small gear wheels usually employed (not shown), there are driven the color distributing rollers K2 whereas on the ends of the shaft 7.22 bevel gear wheels 62, are provided, the wheel 62 meshing with a! similar wheel 63 of the shaft 7s, and wheel 65 with a similar wheel 66 of the shaft 762. The said shaft k1 serves, by means of a spur gear wheel 64 and further Ysmall Gear wheels, through which the adjacent rollers drive one another, to drive the color distributing rollers K1 and-similarly-the shaft serves, by meanspof a spur gear wheel 67 and 'further 'small gear wheels, to drive the color distributing rollers K2. derivated from the shaft 762 the driving of all of the sets K1, K2, K2 of color distributing rollers. These sets of rollers are arranged in `fixed bearings mounted upon the frame of the machine in arms for example (not shown) which are fixed on the upriglits 3 (see Figure l). These color distributing rollers serve the 'usual purpose of transmitting the As will be seen, there is color, taken up and rubbed also Vin known manner, upon the sets of inlring rollers L1, L2, L2 alternately swinging under the action or beam lever frames Z1, Z2, Z3 below the ,print-` ing blocks C1, C2, C2 and coating the lower (printing) surfaces of these blocks with color.

For this purpose the inlring rollers, which are 1 latter an eccentric L is rotating which is fixed on the control shaft M2 (see Figure and the frame 45 itself is guided in vertical guides (not shown). The bar H, which reciprocates vertically under the action of the eccentric 7i, is formed at its upper'end as a'i'acli mesning with a toothed wheel 7 6 (see Figures 4 and which is mounted upon a shaft 77 theY bearings of which are carried by the upper supporting plate G. rllhis shaftV 77 is providedV at both ends with bevel Ofear wheels 7 8 D driving, by means of ysimilar wheels 79, two parallel shafts 8O mounted likewise upon the said supporting plate G. Each of the shafts 8O carries a cam 75 (see Figure 4) actingupon'the upper pin 74 of a two arm lever 73 rotatable on the shaft 7 2 mounted in bearings fixed on the supporting plate G. rllhe lever 7 3 is connected by a link 71 to a lever 76 rotatable on a shaft 70a mounted in bearings on the supporting plate G, the upper slotted end of this lever 70fbeing in connection with the upper shorter arm of the above mentioned lever Z, or Z2. On the shaft 77 (see Figure is also fixed a chain-pulley 8l driving, by' 'means of a chain 82 and a chain-pulley 83,

a shaft 65 arranged in bearings fixed onvtlie supporting plate (i, the shaft carryinga cam 7 5 driving, by means of a mechanism 7 (l,

'71. 74v similar to that just described,

the beam lever Z2 for the set of inlring rollers L2. There is one of the above described driving mechanism for each of the twoobeam levers Z1, Z2, ZS associated with each set of the inlzing rollers Ll, L2, L3, which rollers swing in one direction under the action of the projecting portion of the cams`7 5 moved by the rack H, and swing in the other direction under the action of usual springs (not shown) during the period in which the lower portions of the cams pass the pins 74 and in which the printing blocks are inked, whereupon the inking rollers return to their original orv color receiving vposition according to Figure 4 eacli time before the printing opertion begins.V I 1 The operation and use of the machine above described is as follows:

l/Vhen the printing ot the sheet of paper with three colors is iinished (at B2) the same carried by the Wheel D-With a quarter o a revolution-back to the platen B0, i. e. the starting point of its Whole revolution and the side abutment S will be raised and the abutment J lowered to the surface ofv the platen BO under the action of the controlling mechanism above describedf Immediately thereafter the sheet gripping means F become opened, the inking rollers operated and during the period in which the printing forms are inked by these rollers and the latter' returned to the color distributing rollers IQ, K2, K2, the operator removes the finished copy, sets it onto the depositing table P2 (see Figure 2), takes up a new sheet of paper Vtroni the storage table l), and inserts it upon the platen BO. After the inking of the printing forms or blocks the sheet gripping means F become closed and remain in closed position until they reach the platen B0 again after a Whole revolution of the Wheel D. At the platen and after the closing of the gripping device F the abutment bar J is raised but the side abutment S lowered to make tree path for the sheet of paper beginning its revolution; the Wheel D makes a quarter'ot a revolution towards the printing base Bl and positions the sheetot paper, Which it has conveyed about a quarter of a circle, readily in the plane of thev same upon the coating of the. printing base B, whereupon the Wheel D is stopped so that the printing with one of the colors required may be effected. rlhe sheet oit paper being at this point printed with one ot the colors is conveyed to the printing base B2 and the samesheet being printed. at this place With tivo colors already, is transmitted to the printing base B2. At each printing base the sheets of paper inserted `ach after the other at the platen it, and conveyed towards the several printing bases are pressed down by the sheet retainingbars R controlled in the manner described for the period ot thev printing operation and tor the purpose. above mentioned. At each stopping of the Wheel D all of the three printing terms Cl, C2, C., are moved simultaneously by the common slide E, so that the printing ot the sheets of' paper lying on the several printing bases with the tirst, second or third color respectively, is carri-ed out simultaneously. This Whole process, namely the progressive manufacturing ot the copy and the repetition of the operation requires, after the 'foregoing statements, no further description. Similarly it is clear that the construction andthe relative arrangement of therseveral driving and controlling parts is chosen on the basis of constructional methods Well known to rthose skilled in the art, in such va Way that the several phases ot the operation have the described time relation in respect to each other.

rlhe machine accordi-ng to my invention is applicable with great advantage not only for printing establishments as such but also for bookbinderies and is especiallyfadapted Jfor carrying out th-e gilding or diierent coloring ot book-covers and.` other printing operations such as text and artistic decoration vin gold uponit is to be re-insertedand so forth.' By

the use of the machine according to: the invention this long-lasting process is avoided as Will be seen'elearly from the operation de` scribed above. 1

i7v7hen, in the case of mistakenly inserted sheets of paper or other disturbances of the operation, a quick stopping of the machinefor some main parts thereof is required, eeuplings of known character, actuated by a hand or 'foot lever, enabling aI ready rengagement or disengagement may be used, for instance, upon the shafts M1, M2 to disconnect the slide. E and thus also the printing terms. Furtlierfor theA disconnection of the` driving of the conveying Wheel'D and the inking rollers, anyv braker devices for brakingtlie large pulley N (see Figure "3)-or a ily Wheel may be provided.

`What I claim is:

l. ln a color-printing machine, the combination ot a number of printingbases arranged equidistanees apartin a circlea-round a common axis, the number of said bases being at least equal to the number ot' colors to be printed, a number of print-ing forms arranged equi'distanees apart in a circle coaxially With the said printing bases and movableto and tro in a direction perpendicular to the plane of the saidcircle, and a gripping device provided ivith means 'for gripping the sheets of paper to be printed, thesaid printing basesY being iixed and said gripping device together with the sheets held thereby being moved ,lim

exclusively in a circle and constantly inthe same plane.

2. In a color-printing machine, thecombination of a numberot printing bases arranged equidistances apart in a circle'around.

a common axis, the number ot said bases being at least equal to the number ot colors tobe printed, a number oit printing forms arranged equidistances apart in a circle coaXially with the said printing bases andf movable to. and

fro in a direction perpendicular to the plane of the said circle, a gripping disc provided with means for gripping the sheets ot' paper to be printed, the grippingdisc being movable exclusively in a circle, a common movable frame for carrying said printing bases, and means for moving said trame whereby any one printing base brought into position for executing certain preparatory operations preceding the printing operation.

3. In a color-printing machine, the combination ot a number oi printing bases arranged eqnidistances apart in a circle around a common axis, the number of said bases being at least equal to the number oi colors' to be printed, a number of printing` 'forms arrange-:l equidistances apart in a circle coaxially with the said printing bases and movable to and fro in a direction perpendicular to the plane of said circle, a gripping disc provided with means tor gripping the sheets of paper lto be printed, the gripping disc being movable exclusively in a circle, a. common movable frame for carrying said bases and rotatable around the said common axis, and means for moving said frame whereby any one printing base brought into position for executing` certain preparatori7 operations preceding the printing operation. v

4. In a color-printing machine, the combination of a number of printing bases arranged equidist-ances apart in a circle around a common axis, the number orn bases being at least equal to the number of colors to be printed, a number of' printing forms arranged equidistances apart in a circle coaxially with said printing bases and movable to and fro n a direction perpendicular to the plane of said circle, a gripping disc movable exclusively in a circle concentric with said circle and provided with means for gripping the sheets oi paper to be printed, a common trame carrying the said printing bases, means to move said frame whereby any printing base may be brought into position for making certain preparatory operations preceding the printing operation, a plurality of sheet retaining bars connected to a common frame, and a single controlling device for said bars.

5. In a color-printing machine, the combination of a number of printing bases arranged equidistances apart in a circle around a common axis, the number of said bases being at least equal to the number of colors to be printed, a number of printing forms arranged equidistances apart in a circle coaxially with the said printing bases and movable to and fro in a direction perpendicular to the plane of said circle, a gripping disc movable exclusively in a circle concentric with said circle and provided with means for gripping the sheets of paper to be printed, a common frame rotatable around the common axis of said printing forms and gripping disc and carrying the said printing bases, means t0 1,eee,929

rotate said frame to bring any-printing base into position for making certain preparatory operations Vpreceding the printing operation, a plurality ot' sheet retaining bars connected to a common trame, and a single controlling device for said bars.

6. In a color-printing machine, the combination of a number of printing bases ar- `ranged equidistances apart in a circle around a common axis, the number ot' said bases being at least equal. to the number of colorsto be printed, a number' of print-ing forms ared, a common iframe carrying the said print` ing bages, means to move said frame to bring any printing base into position for making certain preparatory operations preceding the printing operation, a plurality of sheet retaining bars connected to a common trame, and a single controlling vdevice for said bars, said retaining bars and controlling device being arranged inside and on thev outer surce of a central main trame of the machine.

ln a color-printing machine, the combination of a number of printing bases arranged equidistances apart in a circle around a common axis, the number of said bases being at least equal to the number oficolors to be printed, a number oit printing forms arranged equidistances apart in a circle coaxially with the said printing bases and movable to and fro ina direction perpendicular to the Vplane of said circle, a gripping disc movable exclusively in a circle concentric with said circle and provided with means for gripping thesheets of paper to ybe printed, a common traine carrying the said printing bases, means to more said trame to bringan y printing base into position for making certain preparatory operations preceding the printing operation, a plurality of sheet retaining bars connected to a common trame, an abutment for the sheets of paper to be inserted, a side abutment for the sheets, and controlling rods tor the sheet retaining bars, said abut-ments and the said gripping disc being arranged in recesses of the main trame of the machine.

8. In a color-printing machine, the combination of a number of printing bases arranged equidistances apart in a circle around a common axis, the number of said bases being at least equal to the number of colors to be printecha number of printing forms ar` ranged equidistances apart in a circle coaxially with the said printing bases and movable to and fro in a direction perpendicular to the plane ot said circle, a gripping disc movable exclusively in a circle concentric with said circle and provided With meansv for gripping the sheets of paper to be printed, a common frame carrying the said printing bases, means to move said frame toloring any printing base into position for making certain preparatory operations preceding the printing operation,a plurality of sheet retaining bars connected to a common a single controlling ldevice for said bars, sets of inking rollers for the Several colors to be printed, a common driving rod for the simultaneous driving of all of the sets of inking frame,

rollers, to he inserted, a side abutment for the sheets, and controlling rods for said aloutments, the said common driving rod of the inking rollers, the controlling device of the sheet retaining bars,

of the main frame of the machine.

Signed at Bucharest, Rumania, this thirty# an abutment for the sheets of paper and the controlling rods yor" v said aloutments being arranged m recessesV

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