US359513A

US359513A - millard

Info

Publication number: US359513A
Authority: US
Publication date: 1887-03-15
Anticipated expiration: 1904-03-15

Description

(No Modl.) -7 Sheets-Sheet 1. S. F. MILLARD.

PLATE PRINTING MACHINE.

Patented Marfw, 1887.

(No Model.) 7 sheets-sheen 2.

\ S. P. MILLARD.

PLATE RINTING MACHINE.

No. 359,513. Patented'Mar. 15, 188 7.-

(No Mdel.) 1

'z sheets-sheet 3.

S. 1". 1111.111111). PLATE 1111111111111 MACHINE.

Patented-111111. 15,1887.

fm/Enfan- 7 D. .R AA L L I. M R S.

PLATE PRINTING MACHINE.

No. 359,513. Patented Mar. 15, 1887.

Effe f5:

N, PETERS Phnwumamw. wanamm. n.c.

(No Model.) 7 Sheets-Sheet 5. S. I'. MILLARD.

PLATE PRINTING MACHINE.

No. 359,513. Patented Mar. 15, 1.887.

7 Sheets-Sheet 6. S. F. MILLARD.

. PLATE PRINTING MACHNE.

(No Model.)

Patentedlvrar. 15, 1887.

7 sneetssheet 7.

(No Model.)

s. r. MILLARD.`

PLATE PRINTING MACHINE.

No. 359,513. Patented Mar, 15, '1887.

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N4 PETERS. Phuml-Mhognphr. Wadngkm, D. C.

UNITED STATES i PATENT Ormes.

SAMUEL F, 'MILLARIL OF NEV YORK, N. Y.

PLATE-PRINTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 359.513,*dated March. 15, 1887.

Application filed May ll, lScG. Serial Nolilll (No model.)

lfo all whom t may concern.-

Be it known that I, SAMUEL F. MILLRD, a

citizenpf the United States, and a resident of the city, county, and State of New York, have invented a new and useful Improvement in Platelrinting Machines, of which the following is a specilication.- My invention relates to improvements in plate-printing machines; and it consists, essentially, in a device ofthe class named having a construction and arrangement ofparts substantially such as is hereinafter described, and illustrated in the accompanying drawings, wherein- Figures 1 and 2 represent elevations, partly in section, of opposite sides of aplate-priuting press constructed in accordance with my Fig. 3 represents a central vertical longitudinal section thereof. Fig. 4t represents a plan view thereof, partly in section,v

to showi'nterior parts. Figs. 5 and 6 represent detailviews'of the plate and impressioncylinders detached from the press'. Figs. 7 and 8 representdetached detailI views of the sheet gripping and feeding mechanism. Fig. 9 represents a detached detail view of the cylinder stop mechanism. Figs. 10 and 11 represent, respectively, alongitudinal andatransverse sectional view of one of the wiperbclt rollers. Figs. 12 to 14, inclusive, represent detached detailviews of the platepolisher. Fig. 15 represents a detail perspective view of one ofthe arms that draw the wiper and polisher rollers toward the plate-cylinder. Fig. 16 represents a detail view ofthe means employed to hold the wiper-belt scraper-knife in connect-ion with said belt. Fig. 17 represents a detached detail view of the plate-inking roller and the means employed to bring said roller into engagement with the ink-fountain to receive ink and the plate to deposit said ink thereon. Fig. 18 represents a detached detail view of abeater employed to lill the engraved lines of the plate. Fig. 19 is a detached view of parts of the operating mechanism.

Referring to the drawings, in which similar letters of reference denote similar parts, I will proceed to describe a plate-printing press constructed and operating in accordance with m invention.

In said press, A designates the frame, of metal,

by transversely-extending rails A`.

and consisting in sides A', held at a suitable distance from each other and in parallel planes I preferably forin the sides A each in asingle casting, providing each with suitable Aapertures to receive the journal-boxes of the several operatingshafts, hereinafter described. The cylinders and other. operating parts of the press are driven' by the'main shaft B, which is journaled in adjustable boxes placed and operated in slots a in the sides A by springs B2 and screws B3; for a purpose hereinafter set forth. This-shaft is provided at its opposite ends, respectively, with 'fast and loose pulleys B* B5, balance or ily wheel B, for operating and controlling the motion of said shaft, and pulleys B7 BS, for imparting motion to certain parts of the-press, hereinafter set forth.

The plate-cylinder C, which is mounted upon and receives rotary motion in the direction of the arrow x from the shaft B, is, in the main, similar in construction to those employed in machines of this class-that is to say, hollow and provided with means for heating, by gas or otherwise, the engraved plate securedthere- If desired, the periphery of this cylinder may be formed in two sections that extend in planes of unequal radius to form a projecting bed, to which the engraved plate may be Vsecured. I prefer, however, to form the body of said cylinder of the sanne diameter throughout,

and to employ therewith a removable and ad-A justableplate-receiving bed, G, havingits surface concentric with the surface of the cylininder and secured thereto in any desiredmanner','buu preferably by thumb-screws c, that` erates to hold the yengraved plate C2 in posi-l tion for operation.

I provide one end of the cylinder C with a gear-segment, D, which may or may not be removable and adjustable, the end teeth, d cl',

ICO

of which are ot' greater length than the remaining tooth, di, of said segment, for a purpose hereinafter to be described.

The teeth ofthe segment D engage similar teeth formed upon segments D' D2, secured to one end upon opposite sides of the impressioncylinder' E, which is mounted upon ashaft, E', journaled in boxes e in the sides A', below the plate cylinder.

The cylinder Eis in form somewhat similar to those employed in machines of this class- 1'. c., consisting ofa hollow body or shell suitably supported from the shaft E upon spokes.

I provide the cylinder E with projecting impression-beds l", which may, if desired, be made integral willi the body thereof'. I prefer, however, to make such beds removable and adjustable, and to secure them to the'eylinder by screws c', that pass outward through the sides of said cylinder and engage screwthreaded apertures formed in the beds.

The blankets E?, with which the impressionbeds are provided, may consist of any preferred material, and as in plate printing great pressure is applied to the impression-bed, it is important that said blankets be stretched very tightly and evenly over the surfaces of said beds. To accomplish this end, I provide that said blankets shalleach be secured at one end, preferably that at which the grippers operate, to the end of its impression-bed in anydesired manner, and at its opposite end be turned over the end of said bed and secured to a roller, c2, that extends transversely of said bed within a recess or groove, e, formed in thelowcr surface thereof. This rolleris provided at one end with a squared portion to receive an operating-wrench, and is held against backward rotation by apawl, c, that is pivoted to the bed and engages a series of teeth formed in the roller.

I provide each of the impression-beds, at its forward beveled edge,with a gripper, F, which consists in a flat knife-edge bar,f, secured at its ends to the upper ends,]", ot' bent or bellcrank levers F', fulcrnmed at]C2 to the opposite ends of the impression-cylinder, near the periphery thereof. The bar f of said grippers is normally held in engagement with the impression beds by springs F2, preferably leaf-springs, that are secured to the ends of the impression-cylinder below and bearing against the arms f" of the levers F', which arms engage, at the proper moments for opening said gripper-s to receive and release sheets of paper, studs FtF", that project inwardly from the frame A', above and below thejournal-bearings ot' the impression-cylinder.

It will be observed that the plate and impression-cylinders are substantially of the same diameter-that the former has constant rotary motion in t-he direction of the arrow 5v, and, through the rack-segments D D' D2, imparts an intermittent rotary motion to the impression-cylinder E, whereby the impression-beds, preferably two in number, are successivelybrought into position to receive sheets to be printed, which are fed thereto from a feed-board, G, that rests upon brackets G', secured to the frame of the machine, and is provided with a suitable side gage, g, to properly register each sheet before said sheet is grasped by the grippers F.

If desired, the forward lower edge of the feedboard may be provided with a register'- gripper to engage the lower edge of each sheet, and at the proper moment to move said sheet forward and into positive engagement with the grippers F of the compression-cylinder. This gripper consists in a roller, G2, having an elastic or resilient cover and mounted upon a shalt journaled in bearings which are formed in curved plates that are pivoted at one end to the edges of the feed-board and bear at their opposite edges upon springs y, secured to said board. These plates project from the upper surface of said feed-board, near the lower end thereof. This roller is flattened upon opposite sides, and is provided at one end with a gear-wheel, y', that is engaged by gearsegments g2, secured to the plate-cylinder, and by which said roller is partially rotated at the proper momentto bring thelower edge ofthe sheet to be printed in reach of the grippers F. It will be observed that thejonrnal-bearings of said roller Gz have a slight oscillating or rocking motion, and that said bearings are normally held at their highest point by the springs g'", and are depressed by their operating-segments to bring the rollers into contact with the sheet only at the moment of feeding said sheet forward to the grippers F, after which said roller is again raised, to permit the forward movement of said sheet to the irnpression-cylinder.

After the sheet has been printed it is deposited upon a carrying-belt, Il, that operates, for a portion of its length, below the impression-cylimler, by which belt, in conjunction with a belt, H', it is carried to the fly H2.

rIhe belts H H' are mounted upon suitable rollers in the manner shown in the drawings, motion being imparted thereto from the pulley B7 of the shaft B by a belt, H3, that passes over said pulley Bl, and thence extends about a pulley, h, mounted upon the shaft of one of the rollers h' of the belt II, and also about a pulley, that is mounted upon a stud, h, projecting from the frame and provided with a crank-pin, 7L', connected by a rod, It, with a crank-arm, It", that projects from the rockshaft h? ofthe fly H2, which shaft isjournaled in the frame at the rear of the machine. The belt II receives motion through a crossed belt, hs, that connects a pulley, h, upon the shaft of the roller h with a similar pulley, hm, mounted upon the shaft ofthe roller h, that operates the belt Il.

If desired, the carriers H II may consist of narrow tapes.v The fly H2 is of the ordinary construction-J c., consists of a rock-shaft, hl, provided with projecting fingers hw.

As hereinbefore stated, the impression-cylinder has intermittent rotary motion imparted IOO IIO

thereto by the continuously-rotating plate-cylinder through the gearsegments D D D2, such motion necessitating the provision of means for stopping the rotation of said impressioncylinder at and in the proper moment and position to receive the sheet to be printed, for holding said cylinder against rotation, and for again starting it in forward rotation at the proper moment and in unison with the platecylinder. I accomplish these ends by and in the following-described means and manner, viz:

I designates an arm that is yhinged at one end to one of the sides A in rear of the impression-cylinder, and projects thence to a point below said cylinder at the end opposite that containing the segments D D2, and is provided at said point with upwardly-projecting lugs l I5, placed a short distance apart and normally held vby a spring, I5, below the arm I in the track of lugs'I* I5, that project from opposite sides of the cylinder at points near the side edges of the impression-beds thereon, so that when said cylinder is rotated one or the other of said lugs 1*-15 will strike against the beveled side edge of the'rearmost lug, I,which is somewhat shorter than its companion, Il, and depress and pass over said lug to and against the lug I2, at which moment the arm Iwill, by the spring I5, be forced upward, thus holding the lug I* or I5 within the space 15, between said lugs I I2, and the cylinder stationary. Simultaneously with the above described action of the arm I the gear-segment D upon the plate-cylinder will be released from the segments D or D of the impressioncylinder and carried forward or around by the rotation of cylinder C until its forward long tooth, d, is about to come into contact with the corresponding tooth of either of the segments DD2, at which moment a cam,`17, upon the main shaft will strike a cam-lever, I5, pivoted to the frame, depress the same, and thereby, through a rigid bar, I9, extending between the lever Is and arm I, depress the latter, and thus release the impression cylinder from said arm I.

Forward rotation of the plate-cylinder will bring its gear-segment into engagement with the gear-segment D or Dl of the impressioncylinder, rotating said cylinder until it is again brought to rest in the above-described manner. v

lIhe engraved plate is supplied with ink from a fountain, J, that is secured to a transverse bar, J', extending from side to side of the frame. This fountain is provided with the usual fountain-roller, J2, mounted upon a shaft, J5, that is journaled in the ends of the fountain J and provided with a pulley, J4, rotated by a belt, hereinafter described. The quantity of ink delivered by the fountain-roller J2 to the form-roller JG is determined by. the usual adjusting-plate and screws, J7, of the fountain.

-The form-roller J5 receives ink from the roller J2 and deposits the same directly upon the engraved plate without the intervention of distributing rollers commonly employed in machines of this class. To this end I journal the roller Jin the cuter ends ofrock-levers J", hinged at their opposite ends to the frame A. I move said levers forward and backward to bring the roller JG into alternate engagement with the engraved plate on cylinder O and the fountain-roller in the following manner:

JJ designates arms that have an adjustable spring-connection with said levers J5, and eX- tend thence forward through guide-loops J1, secured to the sides A, and are provided at their forward ends with inwardly-projecting rollers J,that extend into the ends of the hollow platecylinder and in the track-of camplates J, secured to the inner surface of said cylinder, at each end thereof and in line with the impression-bed secured thereon, whereby, when said cylinderis rotated,the rollers J6 are brought into contact with the engraved plate with greater or less force, according tothe extent to which the springs J13 ofthe arms Jgvare compressed.

J designates the springs by which the rollers JG are returned to and held in contact with the fountain-roller, said springs extending between the rock-levers J5 and bar J, to which the fountain' is secured.

If'desired, a vibratory movement laterally may be imparted to the roller J5 by any suitable means, but preferably by plates J5, Fig. 5, secured tothe outer surface of the platecylinder, at one or both ends thereof, and pro` vided with corrugated outer edges that come into contact with the arms J of the roller J5 and operate to move said roller laterally.

In order to wipe and polish the inked plate and thus prepare it for printing, I provide the following-described devices, one ot' which, the wiper, consists in a belt, K, of suitable soft and fiexible material, preferably of calfskin, that passes about rollers K" K2, which are mounted upon shafts K5 K, journaled in adjustable boxes K5, that operate in apertures K in the sides A. These boxes are normally held at their eXtreme outer limitot' movement by springs 7c, that are placed within the apertures between the boxes K5 and inner ends of said apertures. Motion is imparted to said wiper-belt through a pulley, K5, mounted upon the upper shaft, K, and driven from the main shaft through t-he driving-belt. In practice, the belt-carrying rollers K K2 have motion toward and from theplate cylinder,to bring the belt K'into Contact with the engraved printingplate, to remove ink from the face thereof. I insure such movement by and in the followingdescribed means and manner, viz: Upon the shaft K3 K, at each end of the rollers K K2, is placed a box, L, that, when saidshafts are in position, are placed and adjusted back and forth by an adjusting-screw, l, and spring Z in slots Z5, formed in the vouter ends of longitudinally-movingbars L', that move in guideloops or straps Z3, secured to a curved bar, L5, attached by brackets Z4 to the sides A. lThe inner end of each of the bars L is provided with a laterally-projecting roller, L, that extends into the cylinder C at its ends and in the track ofthe camplates Ju, hereinbefore referred to, by which said rollers K K2 are drawn toward the plate-cylinder against the action ofthe springs 7.', which,when the rollers L3 are released from the cam-plates J, operate to return said rollers to their normal position.

I have found by practice that a wiper-belt under great strain or tension produces better results than one in which such strain or tension is but slight; also, that a belt constantly held in great tension is in a short time rendered comparatively useless thereby.

To meet the requirements of the one and avoid the objectionable features of the other ofthe above-stated results, I provide that the tension applied to the belt K shall be variable-that is to say, greater when said belt is in contact with the engraved plate than when in its normal position, as will be presently explained. I have also found that a cylindrical wiper rapidly rotated while in contact with the engraved plate produces better results than could possibly be produced by the dragging action of a belt against said plate. I therefore provide that said belt K,when in contact with the plate, shall fultll the functions of a roller.

I accomplish the above ends by the use of a tension-roller, L, which extends in front of the belt K and intermediate of and near the forward sides of the rollers K K2, from side to side of the machine, and is journaled in ad- .justable brackets L5, secured to said sides.

The roller L4, as is apparent, may be moved backward or forward, by adjusting its brackets L5, and be held at any desired point to impart a greater or less degree of tension to the belt K, the roller-bearings ot' which are, as is above described, drawn l`orward,thereby doubling the belt K over said roller L4, thus increasing the tension of said belt. It will be understood that the roller L4 is to be adjusted back and forth only when it is desired to impart a greater or less degree of tension to said belt, and that said roller normally rotates at a fixed point. By this construction I am enabled to give any desired degree of tension to the belt K, it only being necessary to movetlie roller L* rearward to produce the desired result; also, as will be observed, the belt K assumes, as regards the plate, the character and action of rollers, inasmuch as it is in contact with the plate only at the points immediately between the rollers K K2 and said plate. Again, bythe described arrangement and operation ofthe belt K, a wiping motion, somewhat similar to that performed by hand, is imparted to the plate, inasmuch as said belt, at the point in front of the lower roller, I, operates as the first cloth in a printers hand to wipe the principal part of the ink from the surface of the plate, and at the point in front of the upper roller as the final wipingcloth,to prepare said plate for polishing.

to a bar, M3, that extends from side to side of the machine. It will be observed that the belt in front of the lower roller performs the first wiping action directly after ink has been applied to the plate, and that the belt beforepassing tothe upper roller is scraped, the ink therefrom passing to the receptacle M2, whereby said belt presents a comparatively clean surface at said upper roller to finish the wiping process.

I preferably make the surface of each of the rollers K K`Z highly elastic, whereby inequalities of adjustment of said rollers, due tothe adjustment of the plate-cylinder C, shall not operate to prevent the perfect action of the wiper-belt, as well as to avoid undue straining or stretching of said belt by such adjustment of the plate-cylinder. To these ends I provide each of said rollers with a core, K'D, preferably of metal, provided upon :its periphery with a series of longitudinally-extending ribs, Km, and surround said core with an envelope, K4", of resilient or elastic material, preferably rubber, having internal ribs, K, that engage the ribs IVX of the core.

K'jy designates plates placed upon the shafts of the rollers K K2, at each end thereof, and secured to said shafts and rollers, respectively, by screws KTX.

Although shown in connection with a rotary press, it will be understood that the wipers herein described will work equally well upon a press having a reciprocating impression-bed, it only being necessary to impart rotary motion to the shafts of said wiper.

I provide that the belt K shall have lateral vibratory motion, whereby it moves upon the surfaces of the engraved plate in a zigzag course or direction. To this end I provide the wiper shafts K3 K4 at one end with rollers Z, having zigzag peripheral grooves Z', that receive small rollers Z2, which are mounted upon pins projecting downwardly from arms Z3, secured to the boxes L, (see Fig. 15,) whereby when said shafts K3 K4 (which are loosely mounted in their journal-boxes) are rotated they are caused to move back and forth in longitudinal direction and, as will be uuderstood, to operate said belt K in the course named as regards the plate C2.

I provide that the engraved plate after passing the wipers shall be polished and prepared for printing by degices that in action very closely approach that exerted by the human arm and hand, as I have found by practice that such, when properly performed, produce the finest results. rIhese devices I will now proceed to describe.

N N designate the polisher-shafts, that are journaled in sliding boxes n, operating in slots IOO IIO

, the plate-cylinder.

n', formed in the sides A above and in front of These bo'Xes are normally held against theV outerI ends of the slots by springs a2, that are inserted between the opposite ends of said slots and the boxes a therein,

and are drawn inward to bring the polishers into engagement with the engraved plate by longitudinally-moving arms N2, that slide in guide loops or straps N3, secured to the curved bars L2 at the sides of the machine.

The arms N3 are provided at their inner ends with laterally-proj ecting rollers n3, that extend `into the end of the plate-cylinder and areen.-

gaged by the cam-segmentsJ12 therein. The opposite outer ends of said arms N2 are slotted at n* and provided with adjustable' boxes a3,

4operated by screws a3 and springs nl, and by which the shafts N N are connected to saidl arms N2. So far' as described, the construction and operation of the shafts N Nand arms N2 are similar to that of the roller-shafts K3 K", arms L, and roller L of the wiper-belt, and shown in Fig. 15. In operation said shafts N N move toward or from the plate-cylinder, ae-

` cording as the'engraved plate is presented to or Withdrawn from the polishers. I provide each of the shafts N N near its-opposite ends with hubs O, provided with outwardly-proj ecting curvedarms O', having their outer ends Y slotted to provide lugs o', between which I place and pivot, by pins 02, lugs O3, formed upon the inner ends of arms O3, having bifureated outer ends that receive the ends of padded bars OL. O3 designates bars the ends of which take under'lugs o3, formed upon the inner faces of the arms O', and said bars operate through hooks oL 03, projecting, respectively, from said bar O3 and the pad-bars, and springs o6 to hold said pad-bars in position. I provide the bars O't upon their outer faces with pads, preferably having a resilient or elastic body, O3-as, for instance, rubber-covered and held in position by an outer coat, 07, of calf-skin, that'passes over the inner edges of each of the bars 0*, and is secured to the back thereof at one side by strips o7, held in position by screws and at the other by springs, as shown.

While preferring the above-described material for and method of constructing the polishing-pad, I yet do not desire to limit myself solelythereto, as different material or forms may be used. I prefer that the arms O3 shall extend from the arms O at substantially the angle shown in Fig. 12, and Ithereforesecure curved springs O3 to the rear edges of the arms O', the outer ends of which form bearing-points for adj usting-serews O3, that project inwardly from the outer ends of the arms O4.

O10 designates bent leaf springs that are secured at one endto the outer edges of the arms O4 near the points at which the arms O4 O are hinged together, and extend over said joints to and bear against the edges of said arms O. By this construction it will be observed that the pad-bars O4 have great elasticity imparted thereto, and that such elasticity may be increased or diminished at will, for the purpose of bringing the polishing-pads into contact with the engraved plate with greater or less force, as desired.

. As before stated, I preferably employ two polishers having the construction described, the padfbars Ottof each of which may, if desired, be set at an angle with their supportingshafts, whereby a draw-stroke77 will be given to the engraved plate by said bars. vOne or both of the polisher-shafts N N may be provided with pulleys N3 N9 and driven by a belt from the power-shaft. I provide thatthe polishingpads be kept free from ink. by causing the pads thereof to rotate against the outer surface of a cleaning-belt, P,mounted upon-rollers P', journaled in the frame of the machine and rotated by a pulley, P2, secured upon the shaft of one of said rollers, and a driving-belt.

Q, designates a dull-edged scraper-knife thatA is secured to a bar-,QQ extending from side to side of the machine at the fron't thereof. This knife bears against the belt I), rto remove ink therefrom and deposit the saine in a receptacle, Q2, secured to the bar Q3.

One of the rollers P of the belt I? is adaptedi to be used as a tensionroller to impart any desired degree of tension to said .belt. .The

polisher herein described may be advantal geously used in connection with presses having construction different from that shown herein, it only being necessary to impart rotary motion to the shafts thereof.

If desired, the rollers K K2 of the wi per may be placed and operate at an angle with the axis of the plate-cylinder, to insure perfect filling of the engraved lines of the plate; or beaters may be employed for this purpose, such beaters consisting in padded bars It, similar to the bars OL of the polisher, and secured -to and operated by spring-pressed arms It', hinged to a rotatable shaft, R2, journaled in the frame immediately above the ink-fountain and adapted to strike against theplate when in operation by cams R3, secured to the frame and lying in the track of lugs R4, projecting from the arms It.

In 'operation, the plate-cylinder C is adj usted nearer to or farther from the impressioncylinder E, by its adjusting screws and springs B2 B3, to suit different thicknesses of paper or kinds of ink to be used, and the beds of the impression-cylinder provided with blankets properly adjusted. Paper is placed upon the feed-board G' and a sheet fed below the regis# ter-roller Grl against the same. 'Ihcpress is now started, the plate-cylinder in its rotation first operating, through its gearsegment gt', the register-gripper or feed-roller G3, feedingthe sheet below the same forward belowthe raised bar f of4 one of the grippers F of the impression-cylinder. the'plate-cylinder is next broughtinto engagement with one or the other of the segments D' D2 of the impression-cylinder, rotating said cylinder, and bringing the sheet of paper now held by the grippers F on the impression-bed IOC The gear-segn1ent D of justed upon their respective beds.

inte contact with the engraved plate of the cylinder C. The plate and impression cylinders now move in unison until the latter has made a half-revolution, when one of its lugs I I will come into Contact with the beveled lug I of thearm I, depress said arm, and pass into the space I6 and against the lug l2, and thus operate to stop the motion ofsaid cylinder. At the same moment the spring Is will force the arm I upward to normal position. At the moment of coming` to rest the levers F ot' cach of the grippers I will be in contact with the studs Fs F, and said grippers open to release the sheet already printed, which passes to the carrier-belt and ily, and to receive a fresh sheet from the feed-board. The continuous forward rotation of the plate-cylinder will bring its engraved plate G2 successively into contact with the inliing-roller J, wiper-belt K, and polishing-bars O", each of which will in turn be drawn forward and into engagement with the engraved plate by the cams J12 of the plate-cylinder, as hereinbefore described. The cylinder will now again operate the register or feed-roller G2, and at the same moment will depress the arm I through its cam IT and the hinged cam-lever IE and connecting-rod I. One of the gear-segments of the impression-cylinder, now free to rotate, is now engaged by the gear-segment of the platecylinder and the operation above described repeated.

It will be understood that the platereceiving bed C of the cylinder C and impressionbeds of cylinder E may be, through their adjusting devices, moved to different desired parts of said cylinders; also, that the plate C2 ofthe one and blankets Ei of the other may be ad- I deem these features of great importance, as thereby, in connection with vertical adjustment of the plate-cylinder, I am enabled to fully and easily control the action of said parts.

In printing from engraved plates it is ncevessary, in order to produce good results, that the sheets be first dampened. Usually, this has been done by hand, such resulting, inthe majority of instances, in irregularly dampened sheets-that is to say, someparts of said sheets having a greater degree ot' moisture than others, by which said sheets are rendered liable to be smeared by the plate. I have found that automatic dampcning ot' the sheets produces ,better results, and to this end the registerroller G2 may be cylindrical in cross-section, and have a cover of spongy or porous material adapted to receive moisture from a suitable source and to impart such moisture to the sheets. IVhen employed in this capacity, the roller G2 requires to be continuously rotated.

Vithout limiting myself to the precise construction and arrangement of parts shown, I claiml. In a plate-printing press, the combination of a continuously-rotating plate-receiving cylinder having a removable plate-receiving bed with an interniittently-rotating impression-cylinder, said cylinders having diameters ol" equal length, substantially as dcscribed.

2. The combination of a continuously-rotating plate-cylinder having a removable platereceiving bed with an intern'iittently rotating limpression-eylinder having a diameter equal in length to that of the plate-cylinder and means, substantially as described, for operating said cylinders in unison at stated periods of time, as and for the purpose specified.

3. In a plate-printing press, the combination, with a continuously-rotating plate-cylinder andan intermittentty-rotatingimpressioncylinder driven thereby, of a gear-segment secured to said plate-cylinder and provided at its opposite ends with gear-teeth of greater length than its remaining gear-teeth to engage similar gear-segments upon the impressioncylinder to rotate the cylinders in unison at stated periods, substantially as described.

4. An intermittently-rotating cylinder having projecting lugs, as I4 I5, in combination with a hinged arm having lugs II and means, substantially as described, to canse said lugs to engage and bring said cylinder to rest, as and for the purpose specified.

5. A hinged arm having upwardlyprojecting lugs and operating-spring, in combination with an intermittently-rotating impression-cylinder having projecting lugs, substantially as described.

6. An intermittently-rotating impressioncylinder having impression beds, gear-segments,and projecting l ugs, in combination with a hinged arm having lugs and means, substantially as described, to bring said arm into engagement with said cylinder at stated periods of time, as and for the purpose specified.

7. A hinged arm having upwardly-projecting lugs to engage an intermittently-rotating cylinder and means, substantially as described, for depressing said arm to release said cylinder, as herein set forth.

8. In a plate-printing press, a hinged arm, I, having projecting lugs and supportingspring, in combination with an intermittentlyrotating imprcssion-cylinder and a releasing cam and rod, substantially as described.

9. rIhe combination ot' the main or driving shaft having a cam-block with a cam-lever, a connecting-rod, a hinged arm having lugs,and the intermittently-rotating impression-cylinder of a plate-printing press.

10. In a plate-printing press, the combination of the main or dri ving shaft provided with a cam-block, and the eontinuously-rotating plate-cylinder mounted on said shaft, with a cam-lever, as It, rod, as I9, hinged arm I, having projecting lugs, and an intermittently-1'0- tating impression-cylinder, substantially as described.

1l. Aplate-recciving cylinder provided with apertures, a movable impression-bed thereon having apertures and peripheral grooves, an engraved plate, and means, substantially as de- IOO IIO

ITO

` scribed, for adjusting said bed and plate, as

and for the purpose set forth.

12. Ina plate-printing press, and in combination, a plate-receiving cylinder, an engraved plate thereon, a vibrating fornrinking roller, and means, substantially as described, to bring said roller successively into contact with the engravedplate and ink-fountain, and to impart longitudinal vibration to said form-inking roller, as and for the purpose set forth.

13. In aplate-printing press,aeontinuously rotating plate-receiving cylinder, an engraved plate thereon, and the roller-moving cams se! cured to said cylinder, in combination with longitudinally-moving arms,which are hinged tothe arms thatsupport the forminking roller, and said form-inking roller, substantially as described. 'i

14. In a plate-printingpress,a continuouslyrotating cylinder, an engraved plate thereon, and roller-moving cams secured to said cylinder, in combination with the fountain-roller, the form-inking roller, and connections, substantially as described, between said cams and formroller to move said roller successivelyinto contact with the cylinder and fountainroller and to impart longitudinal vibration thereto, as and for the purpose specified.

15. In a plate-printing press, a plate-wiper belt having intermittent variable tension greatest at the moment of contact with the plate, substantially as described.`

16. A continuously-rotating cylinde r,an engraved plate tliereon,a wiper-belt therefor, laterally-movin g rollers supporting said belt,and a stationary tension-roller to impart an intermittent variable tension to said belt, substan tially as described.

17. In a plate-printing press, a continuouslymoving w'iperbelt having variable tension, in combination ,with a continuously rotating plate-cylinder, an engraved plate thereon,and means, substantial-ly as described, for bringing said belt into contact with said plate at two points, as and for `the purpose specified.

18. In aplate-printing press, aeontinuouslymoving wiper-belt having variable tension, in combination with a continuously rotating plate-cylinder, an engraved plate thereon, and

means, s-ubstantially as described, to cause said belt to assume the character of cylinders as regards said plate, as and for the purpose specified.

19. A wiper having laterally-moving rotatable rollers,acontinuously-moving belt mounted thereon, and an adjustable stationary tensionroller to impart an-intermittent variable tension to said belt, substantially as described.

20. A wiper having rotatable rollers journaled in movable bearings, and a belt mounted upon said rollers and provided with means, substantially as described, to impart a variable tension to said belt,- as and for the purpose specified.

21. A wiper having rotatable resilient rollers, a belt having variable tension mounted thereon and operated thereby, and means,

substantially as described, to bring said belt into contact with theplate of a plate-printing press, as and for the purpose set forth. t

22. The combination of a rotatable platecylinder having cams J12 with longitudinallymoving wiper-controlling arms L, adjustable boxes thereon, wiper-rollers K K2, wiper-belt K, and means, substantially as described, to

impartvariable tension to said belt, as and -for the purpose specified.

23. A wiper having rollers provided with metallic cores and elastic or resilienteovers, in combination with longitudinally-moving arms L', having adjustable boxes to receive the 'shafts of said rollers, rollers L3, and the cam J of the plate-cylinder, substantially as described.

24:. In a plate-printing press,a continuously- Amoving wiper-belt having laterallyvibrating supportingrollers and a stationary tension-l roller to impart an intermittent,variable tension to said`belt,in combination with a scraperknife, M, and an ink-receptacle, M2, substantially as described.

25.v The combination ofa wiper-belt mounted upon rollers journaled in movable springpressed boxes K5, operated by arms L', with a tension-roller, Lt, substantially as described.

26. In aplate-p rinting press, the frame and a curved bar, L2, secured thereto and provided with guide-loops Z3, in combinatioawith longitudinally-moving bars L', having adjustable boxes L, and rollers L3, wiper-rollers K K2, wiper-beltK, and plate-cylinder, substantially as described.

27. In a plate printing press, apolisher having outwardly spring pressed and padded arms hinged to a rotatable shaft, substantially as described. l

28. Aplate-polisher consisting of arotatable shaft, disks secured thereto and p rovidedwith fixed radial arms, and movable arms 'hinged to said fixed arms'and providedv with padded bars, substantially as described, for the purpose specified. p

29. Aplate-polisher having a rotatable shaft, disks secured thereto and provided with fixed radial arms, movable arms having padded bars hinged to said fixed arms, and means, substantially as described, for operating said movable armsoutwardly from said fixed arms.

30. Aplate-polisher havingarotatableshaft,

disks secured thereto and provided with fixedl IOO ISO

32. A plate-polishcr having arotatable shaft,

"disks secured thereto and provided with fixed radial arms, movable arms hinged thereto and provided with padded bars 0*, and adjust-ing springs and screws, in combination with longitudinally-moving arms N2, having rollers N3, and the plate-cylinder, substantially as dcscribed.

33. The combination of a rotatable plateY polisher having shafts provided with fixed and movable arms and adjusting springs and screws, in combination with belt, l?, substantially as described.

34. Thecombination 0f a rotatable polisher having a shaft provided with fixed and movable arms and adusting springs and screws therefor, a belt, P, to remove ink from said polisher, and a scraper-knife, Q, to clean said belt, substantially as described.

35. A plate-polisher having a. padded bar provided with a resilient body, O, a flexible cover therefor, O7, securing-hooks o4 o5, bar O, and the movable spring-press arms O, substantially as described.

3G. In a plate-printing press, and in combination, acylinder, a 1`eed-board, an intermittently-rotating feedroller having an elastic cover, oscillating bearings for said roller, and gear'- connections, substantially as described, between said roller and the cylinder, as and for the purpose set forth.

37. An intermittcntly-rotating feed or rcgister roller having an elastic cover provided with lattened sides, gear-wheel secured to said roller, and oscillating or rocking journalbearings to support said roller, in combina` tion with the feed-table and a gear-segment secured to the plate-cylinder, substantially as described.

38. The combination of the intermittentlyrotating impression-cylinder with sheet-grippers having levers F and single knife-edged bars f, and springs F2, with studs F3 F, secured to the frame A', substantially as described.

39. The combination ofthe gripper F, secured to the impression-cylinder, with an in termittently-rotating feed or register roller, G2, having resilient cover, substantially as described.

40. A wiper-belt, laterally-vibrating supportingshafts and rollers therefor, and a stationary tension-roller to impart an intermittent variable tension to said belt, in combination with cam-connections, substantially as described, connected to the wiper-shafts to impart longitudinal motion thereto, as and for the purpose set forth.

41. In a plate-printing press, a wipeibelt, as K, its rollers KK, and shafts ICK, in combination with a roller, Z, having zigzag groove h, and means, substantially as described, for vibrating said shafts longitudi nally, as and for the purpose specified.

42. The combination of a wiper-belt, K, having rollers K K2, and shafts K K4, pr0- vided with zigzag groovcd roller Z, with the boxes L and arms Z3 projecting therefrom and provided with friction-rollers Z, substantially as described.

In testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL F. MILLARD.

Ti t n ess es:

XVILLLLM N. W'ALsH, Jnnmrmlr C. AHEARN.