US1006782A - Rotary printing-press. - Google Patents

Description

Y G. E. PANGOAST. BTABY PRINTING ,PRBSS. urLwlgfnon FILED FEB. 21, 1905.

Patented 0st.` 24, 1911.

3 SHEETS-SHEET 1.

G. E. PANGOAST.

ROTARY PRINTING PRESS.

PPLIGATIDN num 11:12.21, 1905.

Patented Got. 24, 1911.

ATTDRNEY G. E. PANCOAST. RTARY PRINTING PRESS. PPLIUATIUN FILED Hmm, 1905.

Patented Out. 24, 1911.

a sums-sum a.

)LW l) ATTonNEvs impressions made in a press empio e ife' o the.

GEORGE E. PANCOAST, 0F YORK, N. Y.'

ROTARY PRINTING-PRESS.

Specification o! Letters Patent.

Patented oet. 24, 1911.

Application led February 21, 1805, Serial No. 246,692.

To all whom 'it may concern: i

Be it known that I, Geenen E. PANOOAST, a citizen of the United States, and aI resident of the city, county, and State of New York,

have invented certain new and useful Improvements in Rotary Printing-Presses, of which the following is a specification.

My invention relates to vrotary printing presses and Vmore particularly to rotar planographic presses employed in mu ticolor printing. t

` My invention is directed more especially to rotary presses emplbying a lurality of planograp ic design surfaces or printing severalcolors in register on paper or similar material in the forni of separate sheets.

An object of my invention is to increase thecapacity of presses of the character referred to without however lowering the grade or character of the workdone thereon.

It 'is well'known that the quality of the ing planographie design surfaces and t surfaces themselves are dependent upon the speed ,at which the surfaces are driven while printing. The faster the speed, the oorer the .quality of work and the shorter t e life of'the surfaces, asc measured by the number of good im ressions which may be taken therefrom. gn view of-these and @er con-v siderations presses ofthe characte eferred to in practice-,have always been so constructed and so erated that they can veasily be supplied sheets or fed by hand. Although automatic sheet-feeding devices have long been in common use on presses of various classes, it has never been 'considered desirable or practicable to employ such devices in connection with rotary planqqraphic presses. v

L The universal method 4of presenting sheets to presses ofthe character referred "to is to place the sheets a ainst suitable guides from.

which they are ta en by sheetgrippers carried on the impression cylinder, certainvof the guides-being lifted to permit the sheet to pass from the feed board on to theI impression cylinderand then bein droplped `ing s. eet.

lf into position to receive the succes` In order that-the sheets may be accurately positioned against the ides, it f is'. nary that consivzieraislel time"` e proyidedafor. thisi iperaticn. This tmelis invariaby kgreater t an -from the feed-boarden to-the impression cylinder.

vthereon so that anfimpression may 'sucient timeY for' the postioriin the time required to draw the sheet` Where the impression cylinder isidriven at constant speed and the impression surface thereon has a circumferential extentequal to the width of the largest sheetl that the machine is designed to rint, there must be a blank space rovid on the impression c linder which is greater than the length of t 'e. impression surface itself. In practice the impression cylinder is provided vwith a single lmpression surface which has a circumferential extent less than onehalf of the circumference Iof the im ression cylinder, and each of the several design cylinders 1smade one-half the diameter of the impression cylinder, so that they have two revoluvention, the impression and design cylinders' and the s nfaces thereon are so proportioned' that said cylinders may operate Ito print during they greater artof each revolution, and

Van automatic sect-feeding mechanism is provided which is adapted accurately to position the sheets with reference to the 1m pression`4 cylinder in less time than is required for the passage o f the sheet on to the impression c linder. Where two or more design cylin ers are employed, the impression cylinder ismade .two or more times the diameter of the design cylinders and a plurality of `impression surfaces Aare rovlded made by the design cylinders on one ofthe im pression surfaces at each revolution o the design cylinders, only such s ace being provided betw'een the Vadj acont e ges of thesuccessive impression surfaces as will pgovige y e automatic feeding mechanism of t e sheets go be takedby the successive impression suraces.

The space: whichv is necessarily pro-y alsvided lbetweenv these surfaces for the recap? tion et suitable and convenient means forsecurng the impressionblankets or packing onv `the impression and for securing the surfaces onthe degn cylinders constitutes a -sncientseparatlon of the irnpressionsurfeees 't0 V -bvde for the posihoning-cf the sheets bytheautomliticfeeder. It wilbe seen thejtby this constraint-ion the machine is doubled without increasing the speed at which the surfacesare driven and consequently without lowering the grade or character of the work or shortenin the life of the design surfaces; or, if desired, the machine maybe run at a slower surface speed so as to improve the work done thereb and at the same time an increased output lie secured.

Other objects of my invention will more fully a pear from the following more detailed dbscription of the same in connection with a particular embodiment thereof. c

My invention consists in the novel imrovements, constructions, and combinations erein shown, and described.

In order that my invention may be more fully understood, I have illustrated in the accompanying drawings, which are referred to herein and form a part hereof, one embodiment of the invention, the saine serving in connection with the description herein capacity of the to explain the princples of the invention.

Of the drawings gure l is a side eleva tion .-of a machine constructed in accordance with my' invention; Fig.\2 is a longitudinal central section of the saine; Fig. 3 is a vertical transverse section taken on the line 3,3 of Fig. 1; and Fi 4 is a side elevation, partly in section,'o a detail.

Like reference numerals refer to like parts wherever they appear throughout the several views.

Referring in detail to the particular embodiment of my invention illtitrated in the 4drawin i, 1 represents a base frame upon which 4t e various parts of tlie machine are mounted. Near one end of this base frame is erected the frame of a printing press, said press frame consisting in the main, as shown, .of two vertical side frames 2'and 3 upon -whichl the various arts of the press are mounted. The details of the press may be varied between wide limits. .As shown, the rises an impression cylinder 4- press coni fixed .on a orizontal shaft l5 iournaled near its o posite ends in the side frames 2 andy 3. I'n t e particular embodiment of the invention illustrated three design cylinders 6, 7, and 8 are 4provi-ded and the impression cylinder is provided with two separate and distinct impression surfaces 9 and 10. It is to be understood however that a greater or less number of desi cylinders ma be empoyed and that t e impression cylinder will made of such diameter as is required to accommodate the number of design cylinders ein loyed and at the same time pro-` vide su cient space for the presentation of the sheets thereto; it ybein understood that where the c linders are riverli at uniform spced and t eimpression c lirider is .made larger than the desi the diameter of the impression c linder will be a multiple of the diameter jo the design cylin er f or cylinders,

cylinder or cylinders, Vand that the nuinber of impression surfaces on. the impression cylinder will equal the number of design surfaces on the design cylinder or the largest one of the design cylinders, where a plurality are employed, multiplied b the number of times that the diameter o4 that design cylinder is contained in the diameter 'of the impression cylinder. Where three design cylinders are employed, I find it convenient to make the impression cylinder twice the diameter of the design cylinders, as shown', and where each of the design cylinders carries a single design surface, the impression cylinder is rovided with two impression surfaces, as siown, so that each of the design cylinders will operate on each revolution to make an impression on a sheet -carried by one of the impression surfaces.

In accordance with one feature of the invention, the adjacent edges of the impression surfaces are separated fro-in each other by a circumferential distance less than the circumferential extent of said impression surfaces, and preferably only by such circumferential distance as will provide sufiicient time during the passage of the space between the impression surfaces pasta fixed poinl without substantially varying the sp Iof rotation of the impression cylinder, to permit the accurate positioning of a sheet by an automatic sheet-feeding mech-4 anism. As shown, the space between the adjacent edges of the two impression surfaces on the impression cylinder is somewhat more than one-third of the circumferential extent of the impression surfaces, the circumferential extent of the design .surfaces on the design cylinders occupying somewhat less than three-fourths of the circumference of the cylinders. Means are provided for taking the sheets from the sheet-presentin means, to berpresently described, and hol ing .themen the impression surfaces successively so that each sol sheet shall receive an impression from each l of the design cylinders during the revolution of the impression cylinder. As shown, a suitable sheet grippingdevice is mounted on the impression cylinder at the forward edge of each of the impression surfaces, said gripping devices being designated in the drawings by the numbers 11 and 12, the! same Abeing operated by any suitable means to receive the sheetat one oint in the revolution of the cylinder and after carrying the p same around the cylinder .to deliver it to a suitable deliver mechanism. As shown, the delivery mec anism comprises a-cylinder 13 constructed to make one revolution for each impression surface on the impression cylinder and by means of a suitable gripper 14 to take the sheets from tlie grip ers of the impression ylinder and deliver tiemto a series of tapes or cords 15 by which the sheets are carried to any suitable sheet-receivin mechanism. As shown, the sheets are de ivered from the tapes 15 downwardly between two sets of margin tapes 16 and 17,

from which the sheets are taken by suitable Hy mechanism.

In accordance with one feature of the invention, this ily mechanism comprises an oscillating member`18 having two sets of sheet-en aging iin ers 19 and 20 arranged to take ne sheets rom the margin tapes alternately and deliver them in opposite directions in two separate piles 21 and 22, the anglebetween the two sets of fingers being 15. such that while one set of iin ers is depositing the sheet on one pile, te other set is brought into position to take the succeeding sheet, sufficient time being provided to permit the sheet to Atravel downwardly into the path of the fingers after the lingers have passed the line of travel inthe sheets in the margin tapes.

Any sull/'able means may be provided for osciilati the y member. As shown, the axis of rtie VHy member is provided with a segment 23 which meshes with a corresponding segment mounted on a rock shaft 24 hav-Y ing suitable arm and linkeonnection with a pair. of complementary cams 25vwhich are `3.0 rotated in4 unison from the main shaft 26 by suitable gearing 2'7.

As above pointed out, my invention is particularly Vapplicable to machines employ- 4lng lanographic design surfaces, one of the o jects of the-invention being to secure o` maximum product from a machine operating upon paper or similar material in sheet form and having "the planographic dcsi surfaces driven at a mini mspeed.

. T e design cylinders may be constructed to receive any Vform of planographic design surfaces. As shown, the design cylinders i are constructed to receive planographic del. sifgnsurfa'cesin the form of flexible sheets '0 materialhaving surfaces adapted to be `v developed into a planoglaphc design vsur- `face, means provided, as indicated, to

. suitably securete exible' sheets upon the cylinders. If desired,` the space between '50 the opposite edges of the design surfaces may be occupied by an ink-distributing surface, the ink-distributingl surfaces of the several cylinders being in` icated by the reference numerals 28, .29, 30.

In accru'rdance with one feature ofthe invention, means are provided whereby the design cylindcrsandfthe impression cylinderfmay atwill brei ht into or out of cooperativerelation so t t the design sur-` `faces maynotjhebroughtfinto or remain in ,contactwithth'efirnlgirressien surf-aces, when the 'intingcperation ceases. The purpose of'tipsfcaturc is to preventl impressions bemad-'e upon ythe 4impression surfaces gageuncehcets are present, and to .avoid injury to the design surfaces and to permit them to be gummed up and thus preserved when the machine is stopped for any considerable length of time. This operation of the cylinders may be accomplished by any suitable means.

In accordance with the embodiment of the invention illustrated, the design cylinders are moved into and out of coperative relation with the 'impression cylinder. To permit of this operation Ithe carin -s for the opposite ends of thc design cyl nde-rs are carried in slides 31, 32, and 33 mounted in radial guides in the frame and connected by means of radial bars or links 34, 35, and l36 with a pair of cam rings 37 and 38 journaled on the side frames 2 and 3 in concentric relation withthe shaft 5 of the 'impression cylinder and having cam slots 39, 40 and 41 adapted to engage suitable studs on the radial bars or links.

The' cam rings may be operated Vin any suitable manner to impart the desired motions; 'to vthe design cylinders. As, shown, the cam ring 37 is provided with a segment gear 42 which'meshes with a worm 43 suitably journaled on the fram-e and` driven ,from a shaft 44 through the intermediate vertical shaft 45 and suitable gear connections. The shaft 44 may receive motion in opposite directions from anysuitable source, as -a hand lever or wheel or a suitably controlled motor. 'The cam ring 38 is caused th move in unison with vthe ring 37 by any suitable connection, as byvduplica-ting the gear segment and worm .driven mechanismV onthe'opposi'te side of the machine from that shown in Fig. 1 and connecti the same with the shaft 44.

So ar as some features of the invention are concerned, any suitable form of inkin and dampinv mechanism may be provide for each of the design cylinders. ance with one feature of the invent-ion, however, means are provided whereby the inking and dam ing mechanisms and theirfcorresponding esign cylinders may at will -be readily brought into and out of'coperative relation.

In accordance with the construction shown, each of the inking mechanisms comprises a supplying part including a fountain 46, a suitably driven fountain roller 47, and a ductor roller 48 arranged to move alternately into contact with the fountain roller and a roller of the distributing part of the inkin mechanism. As shown, `the distributmg part of i the inkin mechanism includes live distributing cylinders 49 having the usual-vihratory motion, and the intermediate softrollers 50, the same; serving to dis-A tribute the ink and'transfer it from the supplying partfof the mechanism to the applying part 'ofthe mechanism. As shown, the in -appiying` part comprises three rollers,

In accord- Ves 51, 52, and 53. These rollers are preferably made of different diameters, as shown so that they will more evenly apply the ini( to the design cylinders.' These rollers are also movably mounted so that they may be moved into and out of ink-a plying position without disturbingtlie ot er parts of the inking mechanism. As shown, see Fig. 1, the roller 51 is mounted on a pair of arms 54 ivotally mounted in concentric relation wit one of the cylinders 49 so that the roller 51 may be moved into and out of contact with thedesign surface without interrupting its .connection with the distributing part.

The rollers 52 and 53 are mounted in a air of arms 55 suitably pivoted on the rame, and' in order that these rollers may be moved into and out of contact with the design surface without interrupting their connection with the distributing part of the mechanism, a pair of intermediate rollers 56 and 57 are provided, the former of which is mounted on the arms 55 and the latter of which are journaled in a pair of arms 58 pivotally mounted in concentric relation with one of 'the distributing cylinders 49.

For the purpose of moving the applying parts of the several inking mechanisms into and out of operative relation with the design cylinders, any suitable means may be provided. As shown, a pair of transverse rock shafts 59 and 60 are journaled near their o posite ends in the side frames of the inklng mechanisms, said shafts being connected to move in opfpoiA directions in unison and suitably connect with the airs of arms 54 and 55 in which the app ying rollers are mounted. These4 rock shafts may be operated by any suitable means.

In accordance with one feature of the invention, the ap lying rollers are moved out of contact with the corres ending design cylinder when the design cy nder is moved out of operative relation with'. the im ression c. linder. To'this end, the rock s afts 59 an 60 are connected by means of suitable links 61 and 62 with the cam ring 37 in such manner that when the cam rings are moved in a direction to throw out the design cylinder, the a plyin part of the inking mechanism wil also ge thrown out of operative position. In accordance withthe construction shown, the damping 'mechanism for each ofthe desiiL cylinders includes a fountain 63, ductor and water-applyin and distributing rollers 65,V said partseing mounted on an auxiliary frame 66. ,The frames for each of the three damping mechanisms are mounted on a pair Aof rings 67 loosely mounted in concentric relation with` the impression cylinder, as shown in Figs. 3 anda. Any suitable .means may be provided to ,move the inking and ,damping mechanisms into and out. of contact with the design cylinders.

4same in the drawin 1,occ,7 sa

In accordance with one feature of the invention, the damping mechanisms are moved into and out of contact when the design cylinders are moved into and out of o 'erative relation with the impression cylin er. To this end, the frames 67 are connected by suitable link connections with a transverse shaft 68 which is provided at the side of the machine'illustrated in Fi 1 With an arm 69 adapted to be engaged y a stud 70 fixed on the cam ring 37, the arm being 4normally pressed in such direction by a spring 71 as to throw the damping mechanisms into their operative positions.

Any suitable automatic' sheetfeeding mechanism may be provided for suppl ing the sheets to the im ression cylinder, w ich mechanism is capa le v of positioning the sheets to be received by the grppers of the impression cylinder within a short space of time, say a fraction of the time required for one of the impression surfaces 'to pass a fixed point while the press is being driven at printing speed without varying the speed of the impression c linder.

In the machine s own the sheets must be positioned during something more than one-A third of the time required for one of the impression surfaces to pass a fixed point, og in other words during the time that one o the gaps between the iin ression surfaces is passing a fixed point. form of sheetfeeding mechanism which has been found suitable for this purpose is represented in the drawings, the same including a table 7 2 adapted to receive a pile of pa er in a fanned out condition, and means inc uding a cylinder 73 for transferring the pile of sheets to a sheet-separating mechanism. The sheetseparating mechanism includes a table 74 having suitably driven pile-supporting tapes or bands 75, apair of suitably4 driven sheetcombin wheels 76, sheet-forwarding rollers 77, an sheetretarding rollers 78 The sheets are presented by this mechanism at the proper time to suitable front gages 79, which are arranged adjacent to the surface of the impression cylinder and are moved out of operative position at the roper times to permit the sheets to be taken y the gripper-s 11 and 12. Suitable means are also provided for positioning the sheet in a lateral direction the same being indicated in the drawings by tli'e numeral 8U. As theV details of this mechanism are well known, it will be unnecessary to full illustrate' 4the or to urther describe the same herein. e sheet-supporting and feeding mechanism may be driven in suitabie time-relation wit the press by any suitable means, asby-a shaft 81 receiving mcti-onfroin the. main shaft 26 of the press.

anismsarefdrivenbfroin themain is aftA 26.

The impression desi cylinders to-,. gether with-their amdampin mechby a train of' gears 82 by which a gear 83 fixed on one end of the shaft 5 of the im.- pression cylinder is driven, the 'printing cylinders and the inking and damping'merlir anisins being driven by suitableconnections with the impression cylinder. y

The operation of the inachincasv a whole will be readily understood from the description of the operation of the sei'eral parts thereof which has already beengiven.

It is to he understood that my invention, as to its broader aspects, is notrlimited to the particular construction .herein shown or 'escribed or to any .particular construction which it has been o rlmay be carried into eetas the particular eonstructionof the various mechanisms may lie-'Varied within wide limits withoutdeparting from' the main principles ofthe invention and without sacrificing its chief advantages. l f A i Having thus described my intention, what I claim and desireA to secure Letters Pat-E ent'is:

1. A .multicolor print-ing press including in combination, an Vln'ipresslon,cylinderljiay-l ing a plurality ot' ini iressior'i' surfaces, a plurality of design sur aces arranged to co: operate during each .ievollitioii:.1.vtl1 onerlof said impression surfaces, and an automatic mechanisn'i for presenting sheets t0. Said" iinpression surfaces fin succession includingi'a'utoinatic means foraccu'ratel ,positioning the sheetsl with reference to sai impressionl surfaces in both the lateral and circuriiferentiai directions, the adjacent edges of @aid impression surfaces hein` se aratcd from' each other cireumicrcntialiyy spacci; of less length than the impression surfaces but at the least as great as about -oncthirdfsnch length,i whereby suicicnt time is` afforded for the operation of theA slneet-presentingl mechanism, without. unduly limiting the speed of the iress. t i f 2. A multicolor planographic .printing pressl inclmling in combination, an ,impress sion eyl-imler having a 'pluralityro impression surfaces, aplurality ofmplanographic' design cylinders arranged ftocoperatie*during yeach revolution with each'impression surface, and an automatic mechanism for presenting sheets to said impression surfaces in succession inelmling auto|iiatie means for accurately positionii-igtlie sheets with reference to said impression sui-faces in liolli tlie lateral and rircumfcrential directions, the adjacent edges of sad impizession lsurfats heilig separated from vat-,li vother oircnuift entially hy spaces at .thc least, as great as about one-third the length of the iliiprussioir surfaces, whereby the sla-.ets may/.lio awnrately positioned with reference to the imiiession surfaces msm-cession without varying or unduly limiting the speed of the iinpression cyl inder.

. iiiultirolor 4 plaiiographic priming press including in combination, an: impresv p to he printed, the adjacent edges. of the im pression sortait-es being separated circumlerentially hy spaces of less extent than the circumferential ,extent ot' the impression snrlaees hut at the least as great as about onethird such extent, a plurality of planograpliie design eylindersarranged to cooperate with each impression surface, and an automatic mechanism for presenting sheetsto `said. impression surfaces in succes sion including automatic means for separating the sheets from a pile and accurately p'ositioning the sheets willi reference to said impression surfaces in both the lateral and circumferential direction. 4. A' multicolor planographic' printing press including in combination, an impression cylinder having a i'ihiriality,v of impres sioiiisuiffacewa plurality of design members arran ed to cooperate with the impression cyliii er, and an autonia'tic mechanism l-for Vpresenting sheets to said impression surfaces l in succession including automatic ineans'for separating the sheets from a pile andfac-4 curately positioning `the sheets with referenceto said impression surfaces in bottin the lateral ,al'1d ciroumferential direetions, the

adj'acciitedges of'said impression lsurfacesJ .lienig se iai-ated from each other by cireumfei'entia distances `lossvthan the circumferential extent of the impression surfaces but at the least as great as about one-third such extent, whereby sutlicient time is atl'orded to permit the accurate positioning ofthe sheetsA with reference to the impression surfaces by said automatic mechanismuilhout varying or unduly limiting the speed of the impression cylinder.

5. plauographie in f in combination, resign4 and impresion cy iuders, aml an automatic incrhauism for pr exiting lslit-ets to and accurately positioning,llienron the impression cylinder in hoth thy axial 4and tfrenmferential posi- 4tions," the impression aml tlesign-cariying surfant-es on saitlcylindtrs lit-.iugm proportioned that sullic'u'nt, time will he provided for thtI :ir-curate positioning ot tho sheets ,hy said automatic mevlmnism without rary ing or unduly limitingl thel speed of tho cylrindvrs and that said rlinders may operate to print during tlul greater part of hutpnot more 'than about three-fourths ot Parli revolution thereof.

t3. multicolor planographif-` printing press includingr in combination, unimpres- .ion cylinder having a plurality of inprt-.si sion surfaces. a pluralityI of plaiiographie design cilinders arranged lo roiiptiutt duiingoavh revolution willi oueof'said iini'irrssion sui-faves. nit-ans wln-rt-lii' thtl design cylinders' andV the impression cylinder Ymay printing prt-.ss in elutl- 5 |'eailil at will be brought inlo and out ol eoiiperalire relation. vunil an automaticv lnei'lianirani for presenting sheetlo said iinpression surlares iu fuere-:sion including autinnaiir ineau` for :u'euralelr positioning llie shi-els with i'elei'elu'e to :iaiil iiniirension surl'ares in bolli llul lati-ral anil rirruuifeieutial directions.

T. multicolor plaungraphie printing lires-s including' in combination. au impression cylinder having.; a plurality of impres- .winn surfaees. a plurality of pianograpliie design iwliiulen-l arranged lo eoiiperale ilur' ing earh revolution with one of Iiiirl impression surfaces. ineans whereby the design rylinilers niav atl will be readily brought into and ont of cooperative relation with the iinpression eyliiuler. aiul an autoinalie ineebiinisni for presenting: SheetI to :iiil impression surface-a in .-ui-eession including automatic means. for eparalingz tliinliiits from a pile and arrurately pnfailiiniing the sheetsI willi i'el'ereiu'e to :iaiil iinpreiou surfaces in bolli the lull-ral ainl cireunifereutial iliree.- tions.

h. .l multicolor plauographie printing liresineluilingl in combination, :in impression i-rliniler haring a plurality of i|u|ires .-:ion surl'aees. a plural1l \l ol' planographie design cylinders arranged lo roi'iperale illiring eaeli revolution with one nl' said impresl ion surfaces, iulciug:` auil damping mechanisms for earli design erlinilei, means whereby the hiking aiul damping' inet-.banisius and ileaigu cylinders nia iilal will bc reaililil brought into ainl out ofroilieralive relation, aiul an autouialiiI ineelfianiaui for presenting: sheets to -aiil impression surfaces in surression inrluiling autouiatir ini-ans for arruraleli` linaitioniunr the sheets with refer- 4enr-e to said iui|iressioi| .fui-fares in bolli llie ebuliitg aulouiatie means for accurately po- Iilioiiing the sheets with referenre. to said impression surfaces in both the lateral inul eireuuil'orenl ial direi-lions.

lll. A uuillienlor planographiv printing: presa including iu combination, an impression cylinder having.: a pluralitji ol impression Surfin-es, a plurality nl" plauuggraphir design v vlinilernl arraugial to cooperate ilul'- sion surfaces in succession inchidin `mat-1c means' for accurately positioning the ing eaeh revolution with one of said im pression surfaces, inking and damping inerhanisins for each design cylinder, means whereby the inlring and damping mec-hanisins and design cylinders may at will be readily brought into and out of coperativc relation. means whereby the design cylinlei-.sand the impression cylinder may readil v :it will be brought into and out ofcooperative relation, and im automatic mechanism for presenting sheets to said impresautosheets with reference to sind impression surfaces in `both the lateral and circumferential directions.

11, A multicolor plnno'graphc printing press including in combination, an impression cylinder having a plurality of impression surfaeesVa pluralitv of planogra. hic design cylinders.ari-ang4 to coperate uring eaeli revolution with one of said impression sur-faces,; inlring' and damping mechanisms forI each design cylinder, means whereby the inking and dam ing mechanismsrmay at will be 'readily rouglit, into and out. of cooperative relation with their 4respective design cylinders, means whereb the design c vlindersnnd the impression cy iiider 'wiiiy reaililynt. willbc brought into' and out of eoperiitivc relation, and im niiionia'tie. mechanism for presenting sheets to said impressa-in surfaces in succession including automatic means for accurately pofsilioning tho sheets with reference. tosaid impression sui'faees in bolli the lateral and eirruiuferential directions.

l2. planographic printing )rees ineluding iii eonibiuiilion; designan: iuii'u'cssion cylinders. hiking and thumping iueehaniifins, ineans whereby the design and iliipreiiz-*ion cylinders and the iiiking and damping inialiaui.\ais lua), at will be readily brought, iulo and out of ei'iiiperatire relation, and an automatic. lneehanisni for i-epai'iiting sheets from a pile and aeeiu'iitelv positioning them on the iiixpressiou v xjlinileiz, the iiiiliression and ileaign-earrjiiiig surfaces on said r-.yliii- Iers being, :in .proportioned that. suflieiont linie will be, provided [or the accurato posi` lioning o( ,the .-:beels by said automatic ineehanisiu without var i-'inf-or unduly limitin; lr the speed of. the c rlilu arnaud that said irlinders may operate to print during the greal'eipart` of but. not. more than about three-fourths of eaeli revolution thereof.

13. multicolor planographic printing prees including in combination1 an iinpres` lion cylinder, a plurality of design cylinders, hiking :nul damping mechanisms, means whereby the design cylinders and the, hiking and damping mechanisms may at will be. readily brou,f,r|'ht` into and out of cooperative relation, an autoinalie mechanism' l' =r separating siheetiil froin a pile and iu'- mimtely positioning them on the impression j but not more than about three-fourths of 1o o i'linder, the impression and design-carryeuch revolution. thereof.

ing,r surfaces of seid cylinders being so pro 1n testimony whereof, I have signed my portioned that suicient time will be proi `neme to this specification, in the presence of vided for the accurate positioning of the two subscribing witnesses.

sheets by said automatic mechanism with- GEORGE E. PANCOAST. out vul-ying or unduiy limitingr the Speed of Y Witnesses: the cylinders and that said cylinders muy W. P. TEN EYGK, operate to print during the greater )mrt of JACOB MILLER.

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