US401790A - Printing-machine - Google Patents

Description

8 B N R O B S 0 PRINTING MACHINE.

Patented Apra 23, 1889;

. fave/2M?.

(No Mode1.)` 48 Sheets-Sheet 2.'

. J. W. OSBORNE.

PRINTING MACHINE.

PatentedApr. Z3, r1889.7`

fin-#2227?. ja Xmmy 8 'Sheeizs--Slleetv 3.

(No Model.)

J. W. osBoRNE.' PRINTING MACHINE.

No. 401,790. 'Patented Apr. 23, 1889.

Mii/755555.'

8` Sheets-Sheet 4 J. WL OSBORNE.

PRINTING MACHINE.

PatentedApf. 23, 1889.

fai/@dimi A Wg l' j# d@ 8 Sheets-Sheet n5.

(No Moaelfu J. W. OSBORNB.

PRINTING MACHINE.

' 'Patented Apr. Z3, 1889.

(No Modl.) As sheets-sheet 6j J. W. osBoRNB.

PRINTING MACHINE.

No. 401.790l PatentedApr. Z3, .1.889.

(No Mode1.) 8 Sheets-Sheet 7. J. W. OSBORNE.`

PRINTING' MACHINE.

Patentedpr. 23

(No Model.) b 8 Sheets-Sheet 8.

J. W. OSBORNB.

PRINTING MACHINE.

No. 401,790. l Patented Apr. 23, 1889..

` ...777 mfg/N272?.

. UNITED STATES v 'PATENT OFFICE.

.IOI-IN W. essonne, OF WASHINGTON, DISTRICT COLUMBIA, ASSIGNOR `To WILLIAM 1I. romans on BOSTON', MASSACHUSETTS.

MACHINE.

`sPEcImcAfr1oN forming part of Letters Patent No. 401,790, dated April 23,1889.

Applies@ nea my 1, 1882.

.To all whom it may concern..-

, Be it known that I, JOHN W. OSBORNE, of

Washington, District of Columbia, have invented certain new and useful Improvements in Printing-ll'lachines for Chromographic and other Printing, of whiehthe following is a. specification.

My invention relates to rotary printing-machines, and also to thoseprinting-machines in which two or more impressions in dierent colors are printedlin immediate sequence and'V in register 4upon 4one 'sheet and upon the f lsame side of it for the production of a eh romegraphicdesign; and it consists in the several and specifically claimed.

combinations of parts hereinafter described Figures 1 and 2 in the, drawings accoinpaf nying this specification represent in plan and section the principal elements of my invention in. a chromatic press for' three. colors. Fig. 3 is a side el evationyon a larger scale, of one complete pair of form and impression cylinders in such a press, showing important details. Fig. 4 is a front elevation Of the same with ,certain partsomitted. Figs' and 6 show in elevation and cross-section a movable false bearerfOrform-roller trucks. Fig. 7 is a horizontal se'cfion'at the line of contact of the two cylinders, Figs. 3 and 4, shcwing in plan the arrangement of the moving surfaces which hold and feed the paper. Fig. 8 is a vertical section of the foregoing, show ving some details of the paper feeding and conducting apparatus. Figli) shows in section an expansiblepnlley or roller truck-used for adjustments of speed.4 .'Figs. 10 and 11 are frontand side elevations of the same. Fig. l2 is a longitudinal section of part of a form -eylinder, showing the application of rubber frietionfgearing for driving the impressioncylinder. Fig. 1 3 is an end elevation of :thesame Fig. 14.- shows in plan part of a form-cylinder adapted for zincOgra-phie printing on a large scale. Fig. 15 is a crosssection of the same. Fig. 16 shows in general sectional outline the position of the damping apparatus when the pressis used for printing in the lithographie manner. Fig. 17'shows in elevation the relative position of one species of damping apparatus andthe form-cyl- 'formis constant.

Berial No. 60,065. (No model.)

inder. Figfl'S shows a modified position of the surfaces which conduct thepaper and supplement-al means fonrernoviug the sheet froms t-he form-cylinder. Fig. 19- gives in general outline the shape which the paper-feeding surfaces may take when the' length of the Fig. 20 represents in 'section and general outline the application of a cylindrical surface for feeding a wel) to the press. Fig. 2l is an elevation of part of the feeding cylindrical surface shown in the preceding ligure. Fig. 2;. shows in elevation the relative positions of an oblique guide-roller and aocyliudricalfeeding-surface. Fig. 23 is a sectional View of a cylindrical feedingsurface like the preceding, but ,adapted for. separate sheets.

ln Figsl and 2, ci represents the form-cyl inders; b, the impression-eylinders, between which a web of paper or other material from the roll c is passed. Each pair of cylinders is geared together as shown in Fig. 1, and all are driven at the same speed from a common shaft, which is omitted from thedrawings, as is the framing,.the inking apparatus, and all details not essential to a'proper understand ing of the leading features off my. invention.

side toward which the paper isfed--and one behind, where itis'delivered. These belts are the full width of the form. Each passes over a large roller, f, and a smallone, g, theV latter being placed as near the line of `contact of the t-Wo cylinders as is convenient,

`and is made small for that purpose. These rollers are parallel to each other and to the` cylinders, Vand are supported in xed but ad# rated rubber-cloth, perforated paper, or Wirecloth, or in some cases of thin sheet metal provided with numerous holes. Each belt, with its rollers, is inelosed ina case, h, which is closed at the sides, bottom, and ends, as shown., but

IOO

" .55'. ing mechanism lnterposed between the roll ot upon the long parallel ways m, nponwhich A sheet 'of paper or siniilar material lyingv 1 5 upon an 'exhaust-beltjjis (in consequence of the atmospheric pressure-,on it) held fast and I evenly by the -s'aie and can bemoved the 'latter is'movedf- In Figs'. 1 and' 2 the web -of paper lies solidly'up'onallfthe .exhaust-be'lts.l

I 4 o Jinst before theforni's d-reachthe impression' cylinders Ib the large, rolls'a'rsjiare' causedto .revolvein the d-ii'ectiong indicated by the ar-` rgws.' vThese Agive simultaneousmoton' to the belts, and 'they earry their paper forward a 5 atsthe properspe'ed independentlyofthe cyliiiders. A lThe forms, properly-inked, reach .the paper Wlhiilel it lis in -motioiniinpress theme selves upon it, `an'd when they ieave the sameits inotion -:forward still'continues for a short .3b-time.' v 0n the distance which isjtra'versed 'by-the "paper before and after it yis impressed by the Efornr'depends the'lengthl of the margin-or blankspace` lbetween' the iinpressionsl. ln

v Figs. Q and 3 the distance between the lines v `oil" eontact of the form and impression cylin- "vglers is a little more than double the length .of the'forins, so that two complete impressions from 'the preceding cylinders are at alltimes 4o on the' exhaust-belts betweenthe cylinders; 5 v In Fig. 2 tliepesition, shown is'approximately.- that which each form-cylinder has at' the moment when the'paper starts.- After the paper stops` it lies over the impression-cylinder, which, while-it revolves freely under it,- has j 'no tendency to propel it forward, because the depressed surface of the form-cylinder relieves itof any pressure from above. It will thus be-seen that in this press. the intermittent movements -are confined to the lighter part-s, which have but little inertia o'r momentum,

while-all the heavy and massive vmachinery re-,'

-v'olves continuously. From 'apurelymechan ical point of view such an arrangement oilers' many practical advantages. The initial feed'- paper, c, and the firstexhaustfb'elt (shown in these iigures)is passedover for the present,

. but will be fully described later on.

In Figs. 3 and 4 one single pair of vcylinders isV shown with fuller details. The form-cylinder is marked a and the impression-cylinder b, as before. The frames it on each side.. con tain `the bearings for both cylinders, said fram es being heldtogetheli by the struts Z, and vthe whole machine as a unit rests and slides I also slide to adjustable positions the other pairsofacylinders of similar .construction used in the chromatic series. Motion is communicated to the fom-cylinder from the long shaft mrunning -thewhole length ofthe ways m, through the intervention of the bevel-wheels o and p, (the former sliding` along the 'feather on the shaft-'11,) the clutch g, and 'the bevelvwheels lrand s, and in like mannerthcother form-cylinders in the series are driven from the same shaft. The clutch vq when freed uponI the upright shafts lets theI form-'cylinder free to turn in its bearings by hand, which isfofteu desirablo Vl; but vin the ,'presshown. iii-:Figs Sand 4 The impression-cylinderb may be driven in I .the usual manner by toothed' gearing'on it and;` en -the form-cylinder, asfindicated in' Fig.

this isaccomplished by frictionl rubber gearing t incontact with the `smooth bearers .u on the impression-cylinder. `This means of driving will be fully described andexplained hereinafter. The im ressioncylinder has upon its surface a continuelle blanket of .rubber or some Aone of the usual'substitutesfdr it, which `is wider than the widest. form used; AThey bearings in` which the axle :of the 'impression :cylinder revolves slide up and'down'in the side frames, 15.-... They rest upon large screws,

which enter them below, (indicated by dotted" lines at 2).)The lower extremity of each screw is stepped jupon a horigontalbearing, and each is provided with a worm-wheel, w, which is'l rotate-'d byworms-on. the rod', communicating with the hand-wheel y. By turning this wheel the impressionfcylinder is raised or loweredso as. to throw it in or ont of gear with' tbeform-cylinder; or to increase or decrease the pressure upon the form.

.The form-cylinder in the press here shown is intended to receive the form upon not more than one-half its perimeter, while the other half' is depressed and' used asf-an ink-table. This arrangement I believe to be the best and roo IIO

most convenient; but the form may cover more than half the cylinder, in which case the ink-table will-occupy less than half. Nor

-is it necessaryfthatthe uncovered partof 'the same should housed as an ink-table, other means 4of carrying V the ink to the-formrollers and helping its distribution being practicable and gwell understood.

Whertthe forni; is typographie, the stereotyped or electrotyped plates yare attached to .the cylindrical surface either directly or upon movable form-blocks in any of the ways prac- 1 ticed by practical printers. When the printing isto be executed in the lithographie manner, and zinc or collographic plates are'emplcyed,theconstruction of the face of the 4 form-cylinder is modified in a way which will be specially shown anddescribed hereinafter.'

For typographie printing the usual bearers maybe used on bothcylinders toprevent excessive localization ofthe pressure oncertain parts of the form; but in Figs. 8 and ethese are'not shown, because their application .and

' position are Well understood, and because the form-cylinders, as in Figs. 3 and 4.

The .frames z, connected by struts and rods Yacross the press, carry the inking-rollers and "their riders. In Fig. 4, to avoid confusion,

only the first rider from the front of the press and the second roller are shown with their connections. The form-rollers (marked a0) are immovable bearings, which' slide radially'to and from the axis of the form-cylin der to a slight extent and carry on their spindles the roller-.trucks bo, Fig. 4, These trucks are expansible rubber-'rollers' or pulleys'of peculiar construction, to be more fully described and explained hereinafter. Their expansiblepcharacter renders it possible-to adjust their diameter exact-ly to that of the roller, and to -secure a surface speed of the latter which shall be identical with that of the form over which the rollers pass. These formrolle'r trucks are driven by friction from the form-cylinder, the bearers .for them, c", Fig. 4, being depressed for part of their surface in such a way as to allow vthem at the proper part of a revolution to drop upon the ink-table and receive a fresh supply of ink. The riders d rest upon the rollers, and are caused to rotate by contact with them. Each end of the rider-spindle is carriedby a fork, j", which forms the termination of a round steel bar' encircled by a strong spiral spring, el. The round steel bar'passes through the sleeve f", the split clutch g, and the nut ho, and terminates above in the cap/i", which is screwed upon or'into the end of the bar to form a' Shop, 4

The sleeve,

and its outside diameter is the same or a little greater than tliatbf the spring e0. -When the rider is in position upon the two form-roll ersand the sleeve f0 is pressed down upon the spring e.0 and the hollow nut h entered into-the thread cut ,in the split clutch go,

the rider exertsA the minimum pressure re` quired of it upon the rollers under it, while i 'the forked bar is still at liberty to rise and 4.fall within the slceve,so"as enable the rider to accommodate itself to the movements of the rollers. By screwing down the nut'h0 this pressure can be increased and adjusted within desirable limits. When this is accomplished, the split clutch `g"`is clamped fast.

For'the purpose of lifting the riders so as to dispense with some of them, or to gain access to the rollers, the vscrew-pin k" closes the fork' below the spindle. Then by lifting the riders radially, `the clutch g having been loosened,

Vthe sleeve f and spring e will both slide through the clutch go; and when the latter is again clamped upon the sleeve thevcap i9 will prevent the. return of the bar, and the roller 4will remain suspended. In Fig. 3 one of the herein described for effecting this purpose,

the split clutch exactly,

.jointly the work of' myself and another person; but their description .could notbe dispensed with for reasons which will be readily seen.

. The adjustment of the `rider so that it shall take, whenclamped, the proper position between the rollers and not press unduly on one of them is accomplished as follows: The two clutches .70 belonging to a rideraare'fast upon the ends of the round horizontal shaft l, and the prolongations of the clutches in theline of the shaft Z0 have bearings m" in the rollerfrarne e', in which they are capable of both a lateral and arotary motion, Outside the bea-rings the ends of these prolongations have keyed upon them the pieces fn. The set- I screws o", one at each end ofeach piece, pgsing through. lugs upon the frame l z, butt against the upper surface of the pieces n, and by adjusting these screws the position of the rider is under perfect control and its pressurefequalizable on the two rollers it lies upon.

In Fig. -3 the pieces n are not all shown, nor are the butting-screws oo upon them. This isy done to exhibit details in Fig. 3; but ilhe corresponding omission is not made in The ink-distribution in this press is effected chiefiy by vibrating the riders.- To accomplish this theupright shaft that drives the form-cylinder is prolonged upward, and by means (if the miter-wheels p0 the pinion q" is driven. This pinion meshes into one of the train of spur-wheels marked c, which drives Aall the rest. The cam-surfaces on the sides of these wheels (shown at s, Fig. 4) vibrate the horizontal shafts l from side to side through the intervention of the anti-friction y"tained by means of the sliding bearings and caps at u? on the 'upright guide-posts r Vand by the notch and pin at u; The posts r" are socketcd into a projection on the side of the cheek-piece lo, and they extend perpendi'cularly upward for some distance above the loo 1fos.

press, and may be connected at top. They act as gui des for the roller-frame e, for by attaching a suitable hoisting apparatus abovethc press to convenientbcams or other supports, and connecting the roller-frame to it.. by means of wire cords, belts, or chains, it can be lifted high above the formlcylinder, whereby the latter will become completely exposed and accessible for the adjustment of the stereotype o r zincographic form upon it, and for' other purposes, after which the rollers and riders as a whole can be at once lowered to their proper position without any disturbance of the inking apparatus or its adjustments. The facilities which this construction offers,-

render it easy in the usual way tolift the rollers promptly oit the form, whenever the.

press stops, by means of a cam or toggle.

The inkffountain is represented lat an", 4y"- being' the fountain-roller, ande the car-ry-V ing-roller oscillating between the same andl plished by the use of a segment or false bearer,

^ the construction of which is shown in eleva -tionjand`section in Figs. 5 and 6. On the' form-cylinder a, Fig. 4, the ribs or flanges a' project slightly fromtheface of the cylinder.

1 These are inserted` tov some depth' in the body et the cylinder. and each is made in two parts, one being a little more than the semicircle and the other a little less. The former is fast,- while the latter caneberemeved at pleasure.

Whengit is desired toheep 'the rollers. a off the form, the smallenfpice at eachendof the A cylinder (corresponding in'position to that of the form) is removed and the segment b made fastin its place 'by suitable screws. 'The false bearers c then rest upon the true bearf ers c under them at both ends ofthe foi-m, and

' the roller-trucks ride up upon them, Whereby the form-rollers escape the form, while they: still run uponA the ink-table, and the ink can 'be gotten up without detriment tothe printing-surface.

.The attaching of the false bearerto apiece similar in size :and shape' to the -replaceable part of the rib,v as here described, is a conven-v ientway of making itv fast in position; *but this piece is not an essential part vof the device, for the' same may be attached in other waysf-as, forinstanee, by screwing it directly down upon the true bearer; or byv substituting'for part of the true bearer a'thieker segment, which would raise. the formLrollers to the extent required to keep them ol'the' form when that changeis desired. i f:

' In Figs. 3 and It a very important part of my invention is shwn-namely, the means I prefer for starting and stopping the large `driving-rollers of the exhaust-belts, though it will be obvious to Yall machinists that there are other ways by which the same results may be reached. The poirier'I forthis purpose is taken from the form-cylinder shaft. .'{The spur-Wheel d', fast von that shaft, gears intoA the 'intermediate e', 'which runs free upon a stud in the side frame, by means of which the 1Wheel fis driven. This wheel is en the in- This arm carries a broad'flat-faced pulley, Z

which revolves freely in bearings in the arm h. The Istii spring -m forces the arm h strongly upward 'at all times, bringing the free pulley lf against the expansible rubber pulley g with considerable force. Between the two the broad endless belt n (not shown in Fig'. 4) is strained. I preferva metallic belt for this purpose; but one ofany description.

which will not stretch appreciably will werk well. The belt passes over the expansible rubber pulleys o'. 'and under the idler p which may also be made expansible with advantage.v The rubber expansible pulleys o are on the spindles of the 'large exhanstlbelt rollers '(shown in' Fig. 2,) and the object in view ls the startingand'stopping of them at proper times relatively to the positionofA the form on the form-cylinder. It. will be'seen that the two sides of the arm 71.', while they .do `not come vin Contact withthe driying rubber pulley g', converge above it and carry between them asma-ll anti-.friction roller, q'-. The cam r', fast on a prolongation of the form cylinder shaft, in revolving oomesin contact `with.

roller q', and, being of the proper `radius,"it depresses the arm h', overcoming in doingso the force of the spring m'. AAThe depression of the armfcauses the'free pulley Z' tqdrop from the driving rubber pulley Yg','ax`1d" the metallic .belt niiet-Ween them instantly springs away from the latter lider the inliuence of the small deeetingpulleys' .'s'. The pulleys s bear'the belt n slightly away-from the face of' the rubber pulley g 'when the Abelt is'not rio` held up to said pulley g' by the free pulley Z.

Under these circumstances the belt fn is no longer driven, and will remain motionless till the cam fragain'allows the spring lm to act so as to hold the belt'up against the rubber v driving-pulley g', thereby starting the eirhaus't-belts forward.

. lhe exhaust-belt case,which in Fig. dwould'f a ear inrontof the cylinders, is rcmoved'to al ow the construction of other partsto be betr" ter-seen and understood. IThe momentum oit' the "metallic belt, the exhaust-belts,- and their rollers -is very little but to makemore definite the moment oifstopping a brake may be ap'- .plied either-directly to the metallic beltorlto one of the rollers over which it passes. Y I In Figs. V3 and 4, the brake is shown at t". it

consists of a curved plate of metal over" the yinstep", tones to the am hf.; As nl@ eem r' l comes round and depresses the arm the brake `t is brought into contactwith the rubber-fl of p' and ls'tops'it,thereby,alsa stopping* the metallic' belt. The cam 'r' consistsy of two leaves sliding on the plate u behind them scribed, are such that't-he surface speed of the exhaust-belts shall be exactly that of the face of the form upon the form-cylinder; but however accurately thisv may be calculated it is haust-belt will be affected.

desirable, formany reasons, that adj ustability 'within a narrowrange should be provided for. This' is done by the employment of the expansible rubber pulleys o' and g'.- tering the diameter of 'the latter in the ma`nner to be yet described both exhaustrbelts will be 'affected ali-ke, and' may be driven fasteror slower. -By modifying the diameter of either one of the pulleys .0" only that exe.

The entire train of mechanism above described forfeeding the paper forward intermittingly I term the paperfeed`mechanism or intermittent feeder.

It is often desirable to run the cylinders in .this press Without feeding the paper forward-that is, withoutallowing the exhaustbelts to move. This is done by depressing the screw in the lug atie', whereby the arm h. is permanentlyl held `down against the drivin g-pulley g.

spring and the metallic belt nei-'er reaches the In Fig. 7 the two exhaustbelts e (indicated by dotted lines 4in Fig. 3) are shown in plan,

a horizontal section of the side framing of the press being made at the line of contact of the form and impression cylinders. In Fig. 8 the same is shown in section on the line whereby the end of one of the exhaust-belt cases 4appears in elevation. Inyboth figures certain parts are omitted which are not now to bev considered. In these drawings, usi-ng the same letters ofreference as before for parts already referred to, b is the impression cylinder; e, the exhaustbelts; h, the. cases, and/t' the tubes through which the air is Withdrawn from lthe cases. f

The bearings for roller-spindles are outside the cases and are adjustable. Those for the large rollers are marked w' and for the small y. Screws which hold the bearings .'r steadily to the frame after adjustment are shown with sirable to prevent it yielding. This is shown at a2 inserted in a bar which crosses the case.

Thesebars are held and adjusted by the tap-v When the exhaust-belts are wide, a bear-A ing at the middle of the smaller roller is de'- j bolts marked` 11.2 The atmospheric pressure on the square inch necessary to hold a sheetof paper fast to a moving surface is very slight; but in the aggregate, when the exhaustbelt has a large superficial area, it becomes a load for which provision may be desirable. Such provision maybe made iu one of two Ways-vim either by making the belt sufficient-ly strong to sustain all the pressure it will have to carry and allowing it to sag within the case, the paper then .following the fiat curve formed by the upper side of the belt, or by placing supports made fast. to the sides of the .case underthe upper part of the bell?, over which it remains fiat, said supports finally carrying all `the weight caused by the difference of pressure wit-hin and without the case.

Supports of this kind may consist of rollers at suitable distances, placed so thatthe upper 'part of the belt' lies upon them; or a smooth perforated plate of metal may beused; or a j numberof thin parallel slats of any suitable j material, separated by washers and bolted together, so as to form a fiat surface pervi'ous to the-air, will be found well adapted for the '4 object in view. In Fig. 8 such a support 1s shown at c2. In most cases it will be found desirable to prolong the small end of the exhaust-belt case beyond the small roller, so as to cause it tol extend as closely as may be toward the line of contact of the two cylinders.

The upper surface of this extension, or 'nosepiece, asit maybe called, is ofen, or only lcovered in part by a number of supporting tongues, as shown at d' in Fig. 7. 'lhesc tongues are especially desirable when sepa-g rate sheets of paper instead of a continuous web are fed to. such a press, toprevent the odge of the sheet being sucked into the short space between the small roller andthe end of the case. When a web is fed to the press, the

paper will generally be strong euou gh to cover the Vopen space without detriment.

In feeding, delivering, or conducting paper by'means of an exhaust-belt it is desirable in most cases to hold the paper on the moving surface by an atmospheric pressure which is just enough for; the purpose, butnot excessive. To accomplish this under varying circumstances with a constant exhausting force, either the dimensions of the tube through whichthe air is removed from the case must be subject to modification and adjustment, or the rarefaction of the air in the latter must be controlled by the more or less free admission of air from without; I prefer roo IIO

the latter mode of obtaining a uniform ex- Y haust, because the changes can be more gradually made and `depend less upon the uniformityof the exhausting force. I effect this. 'object by placing the large adjustable valves pressuragage in the usual manner. The necessityforan adjustmentof this kind will be apparent when itis remembered that v different widths of paper, &c., have to'nass through the r pines, and' that those which do not cover the wholesurface ofthe perviousbelt permit of the ingress of air through the latter to a'greater .or less extent, the .effect -of which must be counteracted yby closing e2 until theproper ro' 'exhaust is restored. These valves are constructed in the simplest manner. They conv sist of hollow cylindrical cups with a thread on Xie outside, screwing into the side of the case.' g number of long slots, f2, Fig. 7, are cut through the Cylindrical part, andas the cups are screwed out'the exposed openings become -largerl wherebymore airis admitted. These valves, being-removablealso give access to the inside of the exhaust-belt cases without .the disturbance of any adjustments, whic'his occasionally desirable. :Each of the exhaustbelt-cases, as, shown in Figs. 7 and 8, is bolted to the horizontal strut Zin such a Way asto admit of adjustmentv as a whole, so as to bring the direction pf 4 their movements inte the same line-that is, into one which is `atrlght angles'to' the line of .contactof the cylinders. The plane in which these belts --move -is also subject to `some adjustment, the 3c screws and other provisions for which are omitted to avoid'confusion.

. The friction-gearing and expansible pulleys to which reference has been made in the Af regoing are constructed-on a uniform principle. Fig. 9 is a'section on a large 'scale of, one of the form-roller trucks bo before expansion.- Fig. l0 shows the same in front eleva-i tion after expansion, and' Fig. 11 is a side elevation of the foregoing. Substantially the very same construction is used for the pulleys 0 and thedriving-pulley g', the dierences being only those of size. In these iigures, g2 is the stock l9x' body of the pulley, provided with the Y' flange h2.' Sliding'on the body is a sleeve, .which Icarries the iiange i2. On the sleeve and embraced by the flanges ha and i? a cylindrical ring of vulcanized rubber is placed, or a number of such'rings k2, separated by thin metallic vplates Z2, as shown in Fig. .9. In whichever 'way the -rubber is applied itis firmly held when 4the pulley' is being made by screwing np the nut m2,and t-he face is then ground ot ilus-h with thecircular flanges. Then when the pulley is in place, by screwing up the nut n still more, so as to approach the Bauges, the pressure on the ru bber will causeitto extend radially and equally from the axle in all directions, whereby the" diameter of thegpulley will be increased, and a subsequent relaxation of the screw will di-I minish the diameter so obtained, the working diameter of the pulley at any time (wit-hin small limits) depending on the position of the nut. When a solid ring of rubber is used, the face of the same after expansion assumes a flattened convex form very suitable for of rubber and annular metallic plates be` tween them, as Z2, the face remains flat for al1 practical purposes, andl such a pulley should be-used whenever the maximum of driving capacit-y is required, as in the case of the pulley g', Figs. 3 and 4.' YVhen so constructed, each ring of rubber expands radially independently of the others, and as the pressure is equal on all that expansion is equal andl the" face of the pulley remains virtually'at. When a stratied pulley of this sort is being made, a definite curve, starting from the flanges, can be given tothe face (including the plates Z2) when it is being ground off, which curve' will be afterward maintained without change during expansion or contracf tion. Such a'face (usually convex to'a very slight extent) is useful for expansible pulleys over which a belt passes to help the latter to maintain its central position. In whichever. way the 'rubber is applied the fact that it is thoroughly supported and held at the sides and does 'not (until expanded) extend beyond them gives great solidity' and 'perfection of form tothe same when in use, and the .whole -forms a truck or pulley possessed of much driving-power and adjustable with great accura-cy within4 moderate limits. 95

Figs. l2 and 13 show in longitudinal section -and end elevation, on a much`srnaller scale than Figs. 9, l0, and 11, the application of expansi ble rubber friction-gearing@ the forxncylinder. bymeans of which the impressioncylinder is driven. This construction is essentially the same as that j ust described. The cylinder a carries upon its end an attachmentA consisting of the annular plate n2, the cylin- ,drical part of which (asa matter of V-convenience) forms the bearer for the form-roller l trucks, while its side reacts against the rubber. Between it and the annular plate o2 the rubber rings and their plates are'held,resting upon the cylindrical part ,of the latter, the whole stratitication being marked p2. The bolts q2,the longheads of which pass freely through plate o2, hold this structure as awhole to the cylinder on suitable shoulders provided for that purpose wit-hout affecting the move-y ments of plat/co2. The stratified ring of rubber at p2 is ground QE flush with the1 face of 'the form on .the cylinder, in which condition it barely touches the bearers on the impression-cylinder. To make it take a grip on the 12o same for driving purposes, it is necessary to expand'it slightly-an operation which is effected by screwing up the bolts r2, whereby the two plates n2 and o2 are approached and the diameter of the rubber increased until the requisite friction is obtained. To insure a perfectly-uniform expansionall round, it is essential that each of the bolts 'r2 be turned to the same extent. .This is provided for by attaching'tothe head of each a small pointer, which traverses a circle, s?, with numbered divisions, over an equal number of which each pointer is made 'to pass in screwing up.

IIO

carrying a belt, whereas with-thinner rings The use of pulleys of the kind described for giving or receiving power in press machinery insures not only the advantages due to theV remarkable grip taken by the rubber and to its equal 'expansion under proper conditions,

but also the absence of all noise and rattle' wherever it can be made to take the place of ordinary' gearing.

In describing my inventionuio special 'ref- 'ere-nce has yet been made to the nature of the form from which the impressions are printed; Vhen relief-plates constitute the printingsurface, they are given the requisite curve and attached to the cylinder or to form-blocks fitted to the cylinder in ways .which are Well known and understood,.and which need not "be fully described in this specification; but

when th'e'press isv used' to print from zinc plates 1n the zinc'ographic manner, or from flexible collographic plates on their metal '14 toavoid confusion.

base, peculiar appliances and modifications of the form-cylinder are required. l

Fig. 14 shows in plan part of a form-cylinder adapted for zinc, and Fig. 15 is a crossseetion-of the same on the line 3 3, which is the middle line of the press. The several transfers for printing purposes are made/to' the sheet of zinc when flatl in an ordinary hand-press, and the sheets so prepared are f then bent round' the part of the cylinder made to receive them, as represented by the black line in Fig. 15, the same being omitted in Fig. To accomplish this operation properly,the body of .the cylinder f linside the truck-bearers e0 is made with two depressions or gaps, one atfeach of the opposite sides, the bottoms of which at f2 are concentric with the cylinder-surface.' Within .each gap astrainingbar, u2, is placed. These as shown by the dotted lines in Fig. 14. The

bars run the whole length of the gaps andextend into arabbet under the segments at 02,

bolts 'L02 close the nippers at 4the upper partof these bars, in which the turned-over edge of the zinc is caught and clamped tight. This being accomplished, the long bolts 21,2, whichI purposessniiiciently so, if the transferring sliding the zinc in cit-her direction across the' and straining have been carefully done; but

some adjustment, slight in amount, though' very important, will in most. cases be necessary to 'bring the design into perfect register with the corresponding designs on the other cylinders. To move the zinc round upon the cylinder either forward or backward, it is only necessary to slack the screws m2 in one`bar and tighten them in the other. To adjust by cylinder,the bolts y2 are usefl,the long screws .r2 being first turned back a little to diminish friction. 'lhese horizontal bolt-spass through lugs on the ends of the bars and butt against the segments r2, throwing the bar and with it in each bar.

the zinc to the right or left, as required. To adjust the diagonals of the design, leaving its center unaected, the long bolts :r2 at the ends of the straining-bars are used, but alternately, one being tightened and 'the other slackened free the ends of the bars in the rabbets to a very slight extent, which. is accomplished by raising the screws z2, the ends ofwhich rest on the floor of the gap, whereby the ends of the strainingfbar drop from the segments n2, and it is freed suiciently to permit of the diagonaladjustment. The screws y2 and z2, which aid in giving the lateral and rotary ad- In doing this it is desirable to justments with precision, may generally'be l dispensed with when a press f of this kind is used (as it often will be)` tov print one color only, for then the position of the design upon the web or sheethas no reference to any other design, as is the ease when thepress is used chromatically and slight inaccuracies iii-the position it ,should occupy are not perceptible.

A vIt will be seen that the position of the nippers in the straining-bar is such that the zinc slopes upward from it to the rounded edge of the gap, so,that when the inking-rollers come from vthe ink-table as they do mot strike an abrupt edge.

To enable a form-cylinder for zinc printing to .receive and 'hold zinc sheets of dilerent lengths suitable tothe designs upon them, oneor both of the gaps described may be made larger than is required fo`r the movements of IOO the'straining-bar.'l Part of the gap (or gaps) i so enlarged is then filled in the manner shown by the pieces b3, to accommodate the largest form which can be printed on the cylindershown in Figs. 14 and 15, which provide for five diteret lengths of zinc. These pieces are flushwith the general surface of the cylinder, and are held in place by the bolts c3. To suit a smaller form than that shown, one or more of the pieces b3 is removed, the. lippieee d8 is screwed into the last which remains, and the straining-bar pushed up to receive the 'turned-over edge of the zinc, as before, after the return of the bolts c3. The lip-piece d3 is necessary to provide a rounded edge, overwhlch the zinc is drawn. In Figs. 14 and IIO 1 5 the pieces b3 are shown as of equal size and all in place together when aform of maximum lengt-h is on the cylinder; but the 'changes 1n length of the supporting-surface may' also be effected Aby' 'making the *movable pleces of dierent sizes and using only one at a time. vVhen this method is adopted, each piece 1s given a rounded edge where the `zinc passes over it, and the lip-piece d is used only upon the edge of the gap when the smallest form goes upon the cylinder, and all the pieces are dispensed with. I

The projecting rib or flange al has been already referred to in describing Figs. 4, 5, and 6. 'lhe countersunk heads of the screws which holdthe movable part of the same in Fig. 15 are shown at e3. This 'rib has another funetion beside that already explained lin connecciently. One such 'method consists in blowyzo tion 'with the false' bearer, to which reference will be made when speaking of su rfa'ees which print in the lithographie manner.

Fig.,1li'shows in outlincvthe relative position of the damping apparatus (required when zinc or a collogi'aphic surface is on the cylinder) to the main fcaturesof the press al- In this drawing, (the cylinders, rollers, &c.v, being lettered as bcfore,) f3 reprcsentsthe ordin ary d-aiiiping-rollers made of absorbent material, and gi their rider. h3'

1 and bearingagainst the same rubber friction gearingA on the .forni-cylinder which drivesthe impression-cylinder. 25

p In this'v way .the rollers are driven at the proper surface speed, andwhile .they comepupon the'form' at the. right time-that is to say, just before the latter passes under the inking-rollers-'they es-.A cape the ink-table as, Figs. 14 and 15, which 1s depressed, as `shown and described. The

. rider ga'has bearings in the same brackets, and

. maybe replaced-,by other methods without- .pressure in away -chinists is held against the vdamping-ro'llers by springfamiliar' to all press-ma This method .of damping, which (excepting the expansible rubber-trucks) is that 1n common use for lithographie presses,

affecting the character of my invention..

In printing from zineiny a chromatic press;

when a fresh impression from one formis brought into contact with .thenon-printing parts of th at form. which next follows it inthe series, an offset .upon those parts will ta'ke place and the Work will snfterunlessa second or final damping is applied to such form- 'after inking 1t. In United States Patent No. 305,169,A .0f September 16, 1884, anfin'vention for'thus protecting'tlie form against offset is fully set forth and claimed, and need-not .be furtherA describedl in` this specifieationthan to show the way in which such second damping admits of application inthe press which'forms the subject-mattei' of the present invention;V For this purpose damping-rollers similar to those employed for the first damping may be used; but other methods arepreferable be'- cause the necessary apparatus occupies less room where free space is desirable, and be- Cause the-very small quantity of water necessary can be applied more exactly and effiv ing on the surface to be damped an atmosphere of air charged with Water at asomcwh at elevated temperature, whereby a filin of dew 1S condensed upon the printing-surface. In

Figs. 16 and 17 the outlet for such saturated air 1s shown at ks. This consists simply of a enpla'nation is re-f perforated tube embraced by al suitable shield or envelope open "toward the cylinder, from which the saturated air issues periodically as the form passes it. 'Ihc movements of a cock or valve` between the supply ol such airlaiid the eXit-tube'lr, actuated by a rod from acani` 1n a manner well understood, determine the duration of the flow of saturated air, while the amount of water which the cold form condenses and precipitates as dewl depends upon the. relative temperature at which the saturation was effected and the quantity of air conveyed to the exit-tube 7H. i`)a.inping apliaratus of any kind in the position'occupicd by 7.1i" is Vnot required on the first pair of cylinders in a chromatic press of the character herein described; because there can be no ofi'set, and therefore Fig. lil represents in this regard a second or subsequent lhe projecting rib-a re pair in-t-he series. ferred to in the foregoing and shown in Figs. 14 and l5 isot importance -when methods of damping analogous to .that just described are employed ,either for the first or for the secv ond damping. In such cases the wateris car# ried to .the printing-'surface by moans of a gentlecurrent of air, and the flange or rib a (see Fig. 17) lprevents the lateral extension of such a ciirrent,`thereby hindering the deposif' toii of water where itr is not-wanted.

In feeding, delivering, and conducting paper by means of moving;r surfaces pervious to v air,- the'accnrate accomplishment of which is an important part of the present invention,

I'avaijl myself, as circumstances demand, of

.certain modifications, vw iic'l now proceed -to explain. llitherto inthis specification the ,Y

upper moving surfaces of the exhaustfbelts have been shown as lying in the planeof the lines of contact-of the several pairs of cylinders which makeup the chromatic series, the

paper as a consequence lying in the'same plane.

This is not an essential consideration,

and may bel departed from .with advantage in line` the relative posi-tions .fthe 'exhaust- .belts for a single pair'when the paperdoes not maintain the saine pla-ne throughout. The

certain cases. Figl 18 shows in general out- 'rtsi pap'er under these circumstances does not pass tangentially between' `the cylinders, but follows the curve of the impression-cylinder for a short distance where it crosses the same. Nhenthe exhaust-belts come to rest after the forni has passed, the impression-cylinder can still revolve freely belowthe paper, which is firmly held before and behind, because it is unaffected by any pressure forcing it into intimate contact with the blanket. 4Vlhen the ink used in printing is very'tenacio'us and adhesive, the inclined position of the exhaustbelts tends to facilitate the stripping of the paper from the form, and laccordingly in carrying out my invention provision is made for adjusting the exhaust-belt cases, so as-to give them a dovirnward-` inclination from'the line of contact, :though to. avoid confusion such adjustment is .not shown in the figures,

as already stated. It is evident that when this is done a web of paper will not lie flat lbetween two pairs of cylinders, but will follow the inclined belts and pass horizontally over the short intervening space.

|In certain kinds of printin g-a s, for instan ce,

when impressions consisting ot large masses encyto lift the same exists, and the necessity "lished, and is the -true' direction to be afterfor increasing the power of the exhaust generally' within the case is obviated.

In certain exceptional conditions presses printing two .or more colors are required, in which a form of constant length is used exclusively. When this is the case, a single exhaust-belt may be adapted to carry the paper from one form to another in the manner shown in Fig. '19. One large driving-roller, o, gives motion to the belt, andthe idlers p3 may be added to increase its grip upon said roller; but whenever the length of the form, added to that ofthe margins, is a variable quantity, the construction of the conducting surface or surfaces between two 'pairs of cylinders must be such as to admit of adjusting the position of each `pair upon the long ways fm, so that the distance between the lines of contact shall be equal te that length or to some multiple of that length.

When paper in the form of a web is fed to a press such as that herein described, it is of much importance that thedirection communica'ted' to the same before it enters the rst pair of cylinders should be accurately estabward maintained throughout its course. For this purpose an exhaust-belt of considerable length may be successfully used; but I prefer to employ (with er without an exhaustbelt in advance of the rst pair of cylinders) a perforated cylindrical surface revolving within and partly inclosed by a hollow case from which the air is drawn by a fan.- This apparatus, which l shall refer teas an exhaust-roller lin this specification and in the claims, is an important part of my invention.

It is closely allied in principle to th exhaustbelt, though possessed of definite advantages of its own. In Fig. 20 the exhaust-roller q8 is shown in section and in relation to other part-s of the mechanism. Fig. 2l is a front elevation of part of the exhaust-roller alone. The roller qs `consist-s of a hollow cylinder of thin metal--usuallybrass-having atrue surface pierced with many perforations. This roller has solid ends, which' are fast' to the,

spindle r3. One of the ends projects slightly, forming a iange, as seen at s, and as a inatter of convenience-the other end may be similarly constructed. The hollow case t8 partlysurrounds the roller, (for the present purpose about one-third,) and is adjustable on its supports (not shown `in the figure) in every direction. It is provided also withsolid ends a3,

which carry the bearings forlthe spindle fr". The tube v3 is attached' to any convenient part of the case, and through it the air is drawn from the latter. When the exposed partofvsueh a perforated roller is coveredlby a sheet -orweb of paper, or other material more or less iniperv'iousl to air, the exhaust within the case extends to the roller itself, the air therein being withdrawn outward through the holes, and the sheet is held rmly on the surface in consequence of the atmospheric pressure thereon. lf the roller is then revolved, the paper will be carried forward in the direction of rotation and at precisely the surface speed of the roller.

The edges of the ease, which are parallel to its axis, are made stiff and rigid, and are inclined toward the surface of the roller at w" and They terminate in thin smooth knifelike edges, which lie close' to said surface without touching it, and areso formed to ad- .mit of passing the paper to the roller and from it in the direction of a tangent, or nearly so, the edge wf especially, which meets the paper as it leaves the roller, acting as a stripper to lift and disengage it from the perforated surface. The exhaust-roller, when situroo* ated as shown in Fig. 20, for the purpose of guiding and controlling the entrance of. a web y of paper into 'a press, may be conveniently driven by putting a friction-pulley, z, (indicated in-position by a dotted circle in Fig. 20,) onthe shaft rs. and in contact with the same adriving-pulley, the position of which is indicated at 0,4,.Fig. 20. One of these should be an. adjustable rubber pulley, preferably the smaller one. i

The pulley a4 is inside the side framing of the press, and is on a shaft passing through the frame and carrying outside one of the pulleys o', Fig. 3, over which passes the metallic` belt n'. in this4 way the exhaust-roller q takes the placev of the first exhaust-belt in llill() the series, and its periodic movements are paper is taken periodically by the exhaustroller from the roll c, but not directly. By

vcontrolled by the' cam fr', Figs. 3 and 4. The

means of the roller b4, (restingy upon c and which is driven at a uniform speed, the pa-I per is unwound with sufficient rapidity to feed the press. The power for this purpose maybe taken from the main sha-ft orl any otherv suitable source. The exhaust-roller takes following it down as' its size diminishes,)

`sistently carried to the side of the flange 83, and, as the atmospheric pressure holds 'the paper where it is placed till disengaged and the said flange vs2 is in thetrue linewhiehfthel edge of the paper should follow, the presenta-4 tion of the yweb will be always correctly made. Fig. 22 showsinfront elevationthe inclined position (greatly exaggerated) of the ,guide-I 'roller c4 in lrelation to the exhaust-roller, with means' for the adjustment of the same. In this'ligure, according as the roller c4 is inclined .the paper will be fed to the flange s", as shown,

f or to a similar flange at the other end of the ,exhaust-roller. s shownin. Fig. 20, the-pafellows the curved table d4 to the contact-line per.v after it is stripped from the exhaust-roller l of ltheflrst pairof cylinders; but, if it is desired, an exhaust-belt may be substituted for vthe table, as in Figs. land 2, under which case should only;rise to half the height of the.

circumstances, however, the outer end of the larger roller, f; so that the web may reach it at a tangent from the stripping-edge ws, and

25 v l haust-belt is lnterposed between the exhaust- 'then' bend over said roller f to the horizontal position. When, asin Figs. 1 and 2, 'an ex-y `r0ller and the first form-cylinder, the drivingroll-erf may be perforated, as shown, wherebyl the adhesion of the paper dueto the exhaust in the case his extended to the belt as it passes over thezrollerf, which would not be the case iffthe latter had a solid lface.

The exhaust-roller olers many advantages Y vwhen used to performl the function here reties without modifying or interferingwith other adjustments. It is 'alsopossible and desirable to, subject the web A'of paperV ,from

'toa' continuous and equable tension. is im' ortant' for obvious reasons. 4s-A the moment itleaves the" stripping-edge fw" This v Itis accoxnp ished yby'diminishingthe sizeof the' pulley ai, (if that be the rubber pulley,)gor enlarging that of the belt=.p\1lley o' on' the same shaft outside the frame so yasl to make the surface speed of the `v`exhanstf'roller. q a very little slower than that, of4 the series .of exhaustbelts in the press. tIt will be seen thatby doing this the paperhasto stretch or slip upon the face ofthe exhaust-rellenand that the strain thusput upon itis a differentialresult entirely under control.

The apparatus here described may also be lused for. the same purpose in another way vwhich isI frequently convenient namely, when heavy paper is fed in the form of web.

This consists in allowing `the pull of the pa- ,1

perit'sel-f to drive the exhaust-rollei-,ttlie metallic belt n', Fig. 3, then playing nopart,) forwhich purpose the pulleys z8 and a are thrown out of contact by diminishing the size of one of them suiiiciently. In this case a friction-brake controlled by ran adjustable A spring or weight is allowed 'react upon the.

and its rotation retarded. Finally, thesanie as shown in Fig. 23 l In this drawing, j" rep- 'is started and stgpped at the proper times spindle of the exhaust-roller'in a manner we l lunderstood, whereby the same is restrain d 70. apparatus can be used to retarda'nd d ireetl the paper in a thirdfway, which consists in clamping the roller qs fast in its bearings and allowing the papelto slip over its whole surface. In this case the retardation and strain upon the paper depends', essentially, upon the intensity of the exhaust, -whichsh 'uld be slight if the exposed part of the perfdi'ated surface is large. In the three different ways of using thejexhaustroller and its ppurte-/So narices-the guide roller c* pla s he same part, placing the edge of the pager always in the true line,which is .in the plane f' the flange s3. Thisis accomplished by vir ue of itsinclined position, which Iurges the web as -it passes onward feebly ibut, persistently to ne side until stopped by the flange, beyond which it cannot go. To regulate'the pressure upon the guide-roller c4, the slack of the paper/may be weighted with a light free roller,`e4, which rises to about the position indicated by the dotted lines when' the paper for one impres; sion has been takemfromwhi'ch it then sinks until a forward movement of the fweb'again takes place; vbut this roller, though` sometimes' usefuLis not an essential part o f myinvention.

` Single sheets maybe fed to a lp'ress of this description by the se of an exhaust-roller,

resents the perforated roller similar Ato that shown in Figs. 20and 21', except that a flange (as sain said figures) is not required. The case 4g,.from which the air is withdrawn, covers the .greater part of lthe rollerfleaving exposed a 105 portion of thesuiace, which forms a continuation of the'feed-board h4, on which the paper Vwhich is to be printed is placed. An expansilble pulley on the' spindleof the exhaust-roller (thepo'sition and approximate size of which 11o are indicated by the dotted circle 154). is driven outside the side framing of the press by the belt n', Fig. 3, whereby the exhaust-roller f4 and driven at t e same surface speed as thefform-eylinders, exhaust-belts, &c. The roller-'case g* is exhausted through a tube at# tached atany convenient place.; 'but its connection with the-exhaust-fan 4is not continuous, as.,in Figs.f20, 21, and 22 the periods of diminished pressure within the case vbeing controlled by a valve or cock, k, which is 'mevedwhen required'by a cam-rod acting on afsuitable lever. The sheets are fed by Vhand from'the feed-board (provided withl the usual guide) against the stop Z4. This is. a little beyond the stripping-edge of the case and a vevy littleabove it. When the 'edge of the sheet touches the stop, its stiffness prevents it falling completely onthe stripping-edge; but -the moment the cock 7o* is'opened it is sucked down flat upon the same and upon the exposed part of the rollerf4. IThis takes `place while the latter is at rest, after whichA lroo,

, addedfto themargin4 allowed' at' the Abead; of

the sheet, as if it were margin, and the distance between the pairs on the long ways m,l `ig's. 3 and 4,is also spaced accordingly.' 'lh'e exhaust in this case when so small a part of the roller f4 is used shouldbe strong'to overcome by the proportionate. adherence of .the paper the resistance offered by the stripping-edge mechanism for of the case.

The specific devices in this feeding sheets l do not claim herein;

ln the drawings which form part ot' this specification, the pairs of cylinders required for the several colors which are'to be printed appear as placed upon the `same horizontal surface; but such arrangement may be departed from without altering the character of my invention. The general direction which the paper takes, for instance, may be perpendicular instead of horizontal, or its general direction may undergo changes 'at dierent places, es would be the case if the diderent lines of contact lay irrafcurve. Nor is it necessary when the several pairs are in the same horizontal plane that the form-cylinder should-be above and-the impression-cylinder below, for this state of things may be reversed 'if the exhaust-belts and their casesjare also inverted, so as to carry the paper with its printed side downward, and although in the preceding description the production of a partial vacuum on one side of a sheet or web is referred to as giving that difference of airpressure which causes the adhesion of the same to a moving surface below it, yet a similar diierence'may be caused and a similar adhesion produced by blowing theair forcibly down upon one side, while theother suffers no such increase of air-pressure. lt is, moreover, obvious that the method of printing herein described is applicable to a single pair of cylinders when impressions in one color only are required, and that web or sheets can be fed to such 'a press. Y

As a printed web (either from such a single pair or from a whole chromaticV series) leaves the press, it may be separated into sheets at onceby cutting apparatus which is well known;

or it ,may be conducted away and dried as a whole. For such guidance of the painted web the employment of exhaust-b elts and exhaustrollers will be found as efficient as are the same devices in the press. By their means the paper is held and handled entirely by its nnprint-ed side,

speed in every direction without injury to the freshly-printed surface.

Having thus described my invention and the mannerin which the same is practiced, what l claim, and desire to secure by Letters Patent, is as follows:

l. The combination, substantially as described, with a case having an open side for the feeding-belt and provided with air-cxhausting mechanism, rot rollers and an end- `less flexible pervious belt mounted on said rollers. l

2. The combination, substantially as described, o the endless pervious belt and its rollers with the case provided at one end with the supporting-tongues and with air-exhausting mechanism.

The combi-nation, substantially as described, o a pervious surface or support, means for moving said surface, and means for applying atmospheric pressure to the same, with the case having its projecting end provided with supporting-tongues.

4. T he combination,- substantially as described, With an lnterrnittent feeder, of two or more pairs of form and impression cylinders having their severalprinting surfaces or forms located to print simultaneously, and means for continuously revolving said cylinders.

5. The combination, substantially as described, with two or more pairs ot form and impression cylinders having their several printing surfaces or forms located to print simultaneously', and means for continuously revolving said cylinders, of intermittent feeders located, respectively, in front of the first pair and between the pairs of cylinders.

6. The combination, substaf=tially as described, of the perforated revolving feedroller, as qs, provided with flange s8 and stationary case, as t3, partially inclosing said roller and provided with air-exhausting mechanism, with the inclined adju-stable guideroller, as ci.

7. The combination, substantially as described, of the perforated revolving feedroller, as qa, provided with flange S5 and sta tionary case, as is, partially inclosing said roller, and provided with air-exhaustin g mechanism, with the inclined guide-roller, as c4.

8. ln a printing-machine, the combination, substantially as described, of thedriving-pulley g', connected by gearing with the formcylinder shaft; the free pulley l in the arm h', held against the pulley g by the spring m', the belt n', passing between the two and over the pulleys o on the exhaust-belt rollers, and the depressing-cam r on the term-cylinder shaft, substantially as and for the purpose described.

9. ln a printing-press, the wheels, as fr0, geared together and provided with earn-surfaces s, in combination with the vibratir 1; shaft L, carrying the anti-friction rollers 3, the forked bars y, andthe form-roller riders,

and can be carried at a definire substantially asand forthepurposedescribcd.

the form-roller trucks,

-10.' 'In a'printing-press, the vibrating shaft Z", in combination with the pieces n", keyed thereon, the screws o0, the forked barsj", and l the form-rollerridera-substantially as and for the purpose described.

11. In a printing-press, the roller-frame z', y carrying the form-rollers, their riders, and devices for vibratingl the' same, and provided I with sliding bearings u, in combination with the guideposts 11, subsantially as and for the purpose described. p

12. In a printing-press, the false bearer c', in .combination with the form-cylinder and substantially as and for the purpose described.

13. In a printing-pressr hav'ng one or more form-cylinders adapted for te reception of flexible forms, the straining-bars u2, provided with nippers,'in combination with the 'segments v2 and the straining-screws an?, substantially as and for the purpose described.

14. dIn a printing-machine having one or more cylinders adapted for the reception of flexible forms, the straining-bars il?, provided with nippers, in combination with the segments v2, the straining-screws m2, the adjusting-screws y2, and the releasing-screws z2, substantially as and for the purpose described.

1nanner,the

15. In a printing-press, the combination,

substantially as described, of aform-cylinder' 3o .ind-artrite.

17.. In a printing-press, aform-cylinder hav'- ing 'gaps in its surface, as described, a straining-bar adjustable in all directions inf'each gap, a flexible form, and mechanism, su`bstantially as described, by which the straining- 4 5 bar may be adjusted in all ldirections in the A gap', allA combined substantially as described.-

18. In a printing-press having la form-cylinder adapted for printing in the lithographie with the form and with apparatus for damping the saine, substantially as and for the purpose set forth'. I

n y J. W.v osBoRNn Witnesses:

Gao. F. GRAHAM, L. C. YOUNG.

projecting rib a', in combination 5o.

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