US637576A - Lithographic press. - Google Patents

Description

Patented Nov; 2|, I899.

'5. HETT. LITHOGRAPHIG PRESS.

(Application filed. June 13, 1898 4 Sheets8heet I.

(No Model.)

lllllmllllll INVENTOR V ATTORNE S mpuoams PETiRS 00.. FuoTo-umo'. wAsr-rmo'rou, u a

Patented Nov. 2|, I899.

' E. 'HETT.

LITHUGRAPHiB PRESS.

. (Application filed June 13, 189B.)

4 sheetsr-sheet 2.

(No'muem INVENTOR W Hm;

ATTORN EYS m: cams PETERS p0, PMOYO-LJTHCH WASHINGTON, n c

Patented Nov. 2|, I899. E. HETT.

LITHUGRAPHIG PRESS.

(Application filed June 13, 1898.)

4 Sheets-8heet 3.

No. 637,576. Patented Nov. 2|, I899.

E; HETT.

LITHUGRAPHIC PRESS.

(Application filed June 13, 1898.)

4 5heets8heet 4,

(No Model.)

ATTORNEYS 1 mags PETERS co. moruq'rum wnsmucnon. n c

UNITED STATEsPATENT 3 OFFICE.

EDWARD HETT, OF NEW YORK, N. Y.

LITHOGRAPHIC PRESS.

SPECIFICATION forming part of Letters Patent No. 637,576, dated November 21, 1899.

Application filed June 13,1898- Serial No. 683,354. (No model.)

To aZZ whom it may concern 7 Be it known that I, EDWARD, HETT, a citizen of the United States, and aresident of New York, (New Dorp,) in the county of Richmond, State of New York, have inventedcertain new and useful Improvements in Lithographic Presses, of which the following is a specification.

My invention relates to lithographic or planographic presses, and particularly to the damping mechanism foruse in such presses.

It has for its main object to provide improved means for supplying water in suitable quantities and at proper times and places to the damping-rollers of a lithographic or planographic press, and especially to prevent an excessive supply of water to such rollers and to the printing-cylinder.

It consists of the novel devices and combinations herein shown and described.

In the operation of lithographic presses great difficulty has heretofore been encountered in avoiding an excess of water upon the damping-rollers and upon the printing-surface, especially where the printing-surface is cylindrical, and particularly so in multicolorpresses, where damping-rollers often lie directl y above the paper web and where there are a plurality of sets of printing-cylinders, each relatively small as compared with 'the drum or impression-cylinder and each with its set of inking-rollers and damping-rollers with their connections, and where, owing'to the necessarily small size and crowded and complicated character of the mechanism and to its consequent inaccessibility when the press is in operation, it is of the utmost importance that the damp'ing'be automatic, exact, and certain in its operation without the use of constant supervision. This difficulty has been due in great measure to the lack of a positive feed to the damping-rollers of water or other suitable dampening liquid and to improper or defective distribution of the water. It is of course essential in lithographicprinting presses that a sufficient supply of water be furnished to the damping-rollers and the printing-cylinder and that such water be evenly and properly distributed. Without a sufiicient supply of water no lithographic printing can of course be done.

of water, moreover, will quickly destroy the A scarcity lithographic surfaces and will produce other injurious results. An excess of water is, however, almost as injurious as a scarcity of water. amount, it tends to form into drops or layers upon the damping rollers or printing-s11 rface, to ruin the lithographic surface, to work back upon the inking-rollers and mix with the ink, to interfere with the proper inking of the printing-cylinder, to fall in drops uponthe web, and generally to render the resulting product inferior or un marketable. I have found that by the use of a belt of suitable material, to which motion is imparted in any suitable manner, communicating both with the fountain containing the damping liquid and with the damping roller'or rollers damping liquid can be properly and positively supplied in sufficient amounts and in even and proper distribution for securing the best results without any deleterious excess of water, without the formation of drops or layers, and without any injury whatever to the lit-hographic-printing surfaces or to the proper inking thereof or to the printed work itself. 7 I have also found that these results are obtained to good advantage where the fountain containing the damping liquid is arranged to have an oscillating movement,so as to bring intermittently against the damping-roller a surface which is supplied with damping liquid from the fountain and which conveys damping liquid tothe damping-roller at the times of such contact.

In the drawings accompanying this specification and forming part hereof, in which like reference characters in the different figures refer to corresponding parts, I have shown and will now proceed to describe the preferred form of my improved devices.

Figure l is a plan of myim proved fountain. Fig. 2 is a vertical cross-section through the same on the lines 2 2 of Fig. 1 viewed as shown by the arrow, and Fig. 3 is a similar section on the lines 3 3 of Fig. l viewed as shown by the arrow.

Fig. 5 is a plan of a part of the fountain, showing certain modifications in the belt and in means for imparting motion to it.

on the lines 6 6 of Fig. 5 viewed as shown Fig. 4 is a side viewof the outside of one of the damping-frames.

Fig. 6' is a vertical cross-section through the same Where the water is excessive in 2 V team by the arrow. Fig. 7 is a verticalcross-sec'-,

tion through the fountain, showing another modification of the belt, taken onth'elines 7 7, Fig. 8, viewed as shown by the arrow; and Fig. 8 is a vertical longitudinal section through the same, taken on the line 8, 8 in Fig. '7. Fig. 9 isa front view of part of .my improved mechanism for driving the roller in they fountain, and'Fig. is a side view of the same mechanism. Fig; 11 is a side view, partly in section, of a multicolor-press with part of the casing broken away, showinga number of printing-cylinders, with their sets of inking-rollers and damping-rollers and con-- nections, with the means for, supplying damp-f ing liquid to the dififerentfountains and forconveying the waste water away, thesupply and overflow pipes being broken, as shown,

to enable other. parts tobe seen more clearly,;

someof the sets of printing-cylinders, dampingrollers, and inking mechanismbeing shown in section and other sets in end eleva tion. Fig. 12 is a section'taken on the lines 12 12 in Fig. llviewed as shown by the arrow. Fig. 13 is a front view of-the damping.-

f-rames and thedamping-rollers and connect ing gearing viewed from the, printing-cylin-- der with part ofthe gearing broken awaythrough its center. Fig. 14 is a vertical cross-- "section taken on the lines 14 14 of Fig. 13' viewed as shown by'the arrow; and'Fig...15 isa vertical cross-section taken on the lines.

15 15 of Fig. 13. I

1 1 1- represent'damping rollers;of a lithographic press, These may be of 'anydesired kind or numberand may be arranged in any ing liquid during such passage, and is theni adapted .topass outside oft'hefountainandinto'contactwith: the damping-roller.

I. belt,ithus enabling the belt to convey damp ing liquid to the damping-roller positively. and-in proper: amounts. The fountain is-sup lied desired m'anner. As shown in the drawings, 1 is the ordinarybrass roller'and constitutes t the distributing-roller, and 1* 1 are the clothcovered rollers which usually come into direct;

contact with the printing-cylinder.

1 isthe drum of a multicolor-press,of which 3 3are the'printing-cylinders. .1- The damping rollers are mounted in'the' usual -manner in damping-frames 2, pivoted to the framework of the press. Damping liquid is conveyed to. distributing-roller 1 from.

fountain 4 by means of a belt5 inia manner.

presentlyto. 'bedescribed. The fountain=4 is preferably made to oscillatefor the purposes and in the manner hereinafterset forth, and" in such oscillation a part of its periphery. is .intermittently brought into contact with-the surface of the damping-roller. Belt5 is preferably made endless, and is adapted topass inside of the fountain and around aroll'er mounted therein,and is moistened with damp-i around that part of itsiperiphery'which comes mittentv motion; is preferablyimpart'ed to. the

with dampingliquid, and an overflow Inter w pipeis provided for the discharge of any excessof the. damping'liquid. f

q I will now proceed to describethe construc- .tion of the fountainand belt, the means for imparting motion to-the beltand to the fountain, and means for supplying damping liq uid thereto and discharging the waste damping liquid therefrom.

"Fountain 4 is mounted in swinging arms '66, pivoted on shaft 6 secured indampingframes 2 2, and isadapted to be oscillated or swung .forwardor backward, so 'asto make contact' intermittently with the surfaces of the damping-rollers by means presently tobe described. The fountain. has a hollow roller '7, which is mounted insidefof the fountain. ,Itj isv preferably-: provided with perforations 8 8. Supply-pipe 9conn'e cts with thefhollow shaftjlO of roller7 at one side of the fountain, the mouth of the hollow, shaft lO opening into the-interior of the roller? Throughsupplypipe 9 andhollow. shaft v10 dampingfliquid is supplied to the interior of the roller 7, whence it passes out through the perforations 8 into.

the outer shell 11 0f the fountain. (Shown in. Figs. 2', 6, and 7.) Endless belt 5 passes around the' periphery of the shell 11 of the fountain, over a rollerl2- into theinteriorof the. fountain,around roller'l, and then passes l around a secondroller-12 onto the outside of the fountain, as clearly shown in Figs. 2-, 6,.

and 7. .Motionis'imparted to this belt pref- -'erably by the devices shown in Figs-.9 and 10. ,These devices are'actuated byithedriving mechanism of the press through'gear- "wheel13, secured to the ink-'distributing'cyl- ,inder 14. Ink-distributing cylinder 14 can be driven by the; driving mechanism of the press in. any suitable manner. a'nisrnis'accordingly not shown in the drawings and willnot be further described. Gear- 'wheel" 13 meshes with pinion 14; loosely mountedon 'shafti6 'in' frames 2, pinion 14* fmeshing. with gearwheel 15,- (see Fig. 9,) keyedon a studx26 running loose .in one of theframes. 2. Inthis stud 26- the shaft. of the upper damping-roller 1 loosely revolves. Small; gear-wheel 16 is. also keyed on' the samestud and meshes with gear-wheel 17,.

keyedupon a shaft 17*, loosely mounted in swinging links 18 and 18", the former link 18 being pivoted to shaft 10 of the fountain and This mech-- IIO at itsend carryingshaft 17*,2thelatter link 18 (see Fig lO) being pivoted at one en'd'to stud 26 and at its free end carrying shaft 17 Onthesame shaft 17 1is also fixedly mounted scam-wheel. 19, having inlone of its sides a 'cam shaped Igroove'20. An oscillating arm 121, carryi-ngaroller 22,. which projects into i'and runs in thesaid groove, hasfingers 22", gpassing, upon both sidesof shaft l'Z for the purpose of supporting the oscillating arm, and

jhasat'its other end an'adj ustable connection,

grocking'bell-crank 23, the latterfhavi'nga slot 235ait' any'point along which slot-pin '22" may by means'of pin and thumb-screw 22 with:

be secured. Bell-crank 23 is loosely mounted upon the shaft of roller 7 and carries a pawl 24, which takes into the teeth of ratchetwheel 25, keyed to the shaft of roller 7. As gear-wheel 13 upon the ink-distributing cylinder 14 is driven by the driving mechanism of the press oscillating arm 21 is moved backward and forward, thus feeding forward ratchet-whee1'25, and with it roller 7, a certain distance at each revolution of cam-wheel 19. The adjustable connection between oscillating arm 21 and bell-crank 23 is for the purpose of causing pawl 24 to feed ratchetwheel 25 forward a greater or less distance at each revolution of cam-wheel 19, the extent of the feed being determined by the point where pin and thumb-screw 22 secure oscillating arm 21 to bell-crank 24. This feed of roller 7 is intermittent. As roller 7 is thus intermittently rotated it imparts an intermittent motion to belt 5. The greater the movement of the belt at the time of contact with the damping-roller the greater will be the amount of damping liquid deposited upon the roller. Accordingly by varying the movement of the belt the amount of damping liquid furnished to the dam ping-roller will be increased or diminished.

The means for imparting a positive driving motion to the damping-rollers are shown in Figs. 13 and 14 and are as follows: Gearwheel 13, secured to and driven by ink-distributing cylinder 14, through pinion 14, loosely mounted on shaft 6, drives gear-wheel 15, keyed on stud 26. The latter gear-wheel 15 meshes with gear-wheel 27, keyed on the shaft of distributing damping-roller 1. Thus the distributing-roller is positively driven by the driving mechanism of the press at any determinate rate of speed desired. Motion is imparted from the distributing-roller to the other damping-rollers by friction in the usual manner. By thus imparting a positive and regulatable motion to the damping-rollers'I am enabled to regulate with great accuracy and certainty the amount of damping liquid to be supplied to the damping-rollers. In order to insure the more certain movement of belt 5, I prefer to also positively drive rollers 12 12. This is accomplished by means of gear-wheel 28 upon shaft of roller 7. Gearwheel 28 meshes with gear-wheels 29 29 on end of the stud and outside of frame 2 a gearwheel 16 is also keyed to the stud. Gearwheel 16 meshes with gear-wheel 30, the lat ter loosely turning in bearings in triangular piece 30. This piece is swiveled upon stud 26. Gear-wheel 30 meshes with gear-wheel 31, also loosely mounted in triangular piece 30,and gear-wheel 31 meshes with gear-wheel 32, loosely mounted on the shaft of roller 7, as shown in Fig. 1. Arm 31 pivoted to triangular piece 30 and encircling the shaft of roller 7, tends to support the chain of gearing described and keeps gear-wheels 30, 31, and 32 in mesh with each other in all positions of the fountain. .Mounted in a hole in gearwheel 32 is a pin 33, having a round head adapted to bear upon a plate 34. A spring 35 tends to hold the rounded head of the pin against plate 34. Plate 34 has a cam-surface 36 upon its surface, upon which pin 33 is adapted to ride as gear-wheel 32 revolves. The cam-surface 36 runs around one side of plate 34, near its periphery, for a distance slightly greater than half the surface of the plate. 37 is a collar surrounding and secured to shaft 10 of roller 7. It has wings 38 38 on each side, as shown in Fig. 3. As gear-wheel 32 rotates pin 33 rides up on cam-surface 36 and is forced through the hole in gear-wheel 32 to the left and in this position strikes one of the wings 38, causing the wings 38 and collar 37, shaft 10, and roller 7 to turn substantially one-half a revolution. Each time pin 33 rides up on cam 36 roller 7 is rotated, as above described. In this manner an intermittent rotation is given to the roller and through it and the rollers 12 an intermittent motion is imparted to belt 5. Plate 34 can be adjusted one way or the other, so as to vary the position of cam 36. It may be locked in any position by means of screw-pin 56, mounted in a screw-threaded opening in the lug 57, forming part of dampening-frame 2. Pin 56 takes into holes 58 in plate 34, as shown in Fig. 1. By screwing pin 56 into any of the holes 58 plate 34 can be locked in any desired position.

In Figs. 5 and 6 I have shown a modified form of connecting the endless belt with rollers 7 and 12. As shown in these figures, a steel tape 39 is fastened to both edges of the endless belt and has holes 40, through which pins 41 upon rollers 7 and 12 are adapted to project. By these means, as well as by friction, motion is imparted to the belt from the rollers. I prefer to use endless belts without seams, as such belts give less trouble and are less likely to develop fullness and wrinkles. Belts with seams, however, may be used if desired. In Figs. 7 and 8Ihave shown means for arranging and securing such belts with a view to prevent fullness and wrinkling. Along each edge the belt is wrapped around a thin cable 42, which is secured thereto by any suitable meansas, for example, by sewing the belt around the cables. The cables are sunk into grooves 43 in the rollers.

The means for oscillating the fountain so as to cause it to intermittently make contact.

with one of the damping-rollers are sh ownin Figs. 10, 13, 14, and and consist of the fol-' lowing-described devices; Shaft 10 of a the fountain is supportedat each side of the press by the forked ends of oscillating arms 6 6, the forks ofj'the arms straddling and supporting the shaft of the fountain. 1 Oscillating arms 6 '6 are keyed on shaft 6. An oscillating up- J ward-and-downward movement is given to pivoted at one'end to one of the arms 6, as

these arms by means of a rod 53, which is shown in Figs. 10 and 13, and at its' other end it carries a roller 54, which runs ina camshaped groove 55 in-the side ofa disk5 5, keyed to the sle'evelof ink-distributingroller 14 and revolving with it.

tri'buting roller 14 revolves an-oscillating movement is by the means above described imparted to oscillating arms.6 '6 and thence to the fountain, causing the latter to oscillate, soasto bring a portion of its surface in'terq mittently into contact with the distributing damping-roller.

In Figs. 11 and 12 I have shown myimproved device as applied to a multicolor-press,

where a largedrum 1 has a series ofrelatively small printing-cylinders 3 surrounding it, each with its set of inking-rollers 4.4 and other inking mechanism and its set ofdam'p-v ing-rollers 1 1. With so many and such fine and such-complicated parts crowded closely together in a comparatively small space it is impossible to show the mechanism in detail or even to show all of it in these'views. They are intended merely to show the general'arrangement of my improved devices in'a mul I ing the waste damping liquid;

ticolor lithographic press and to show the means for supplying damping liquid to the different fountains and the means for remov- 4 5 is a supply-pipe for supplying damping liquid to thediiferent fountains.

nected with any suitable source ofsupply of damping liquid. Branch pipes 46, each provided with a cock 47, lead from the supplypipe 45 andare provided at their ends with flexible-hose. connections +18, leading to the pipe 9 of each'fountain. The flexible hose permits the swinging action of the damping frames2 withoutinterruptiug the, flow of.

damping liquid. By these means damping liquid in sufficient quantities can be supplied to all the fountains Without interfering with the operationof the press. I

, 4'9'is an overflow-pipe for carrying away the 7 waste damping liquid from each fountain.

It has branch pipes 50, having flexible-hose connections 51, with an overflow-pipe 5 2 leading from each fountain. When the water in the fountain rises to the heightof theovem flow-pipe, it will flow off through the over flow-pipe and be discharged. In this-way any 'o verflow'of water from the fountain uponth'e Rod 53- is'fork'ed at, its end, the forks embracing the sleeveof the ink-distributingroller and serving to support the rod at" its upper end. As'i nk -dis- It is c'onmecha-nisin of the pres s or'u-pon the paper or web is' eife'c'tually prevented. v

'" Thebelt may be' 'o'f any suitable 'niaterial and texture which is adapted to bemo'istened byits'passage into and through the fountain and to convey that; moisture in proper amounts to the damping roll'er when brought It is important, howinto contact with it. t 7 ever, that the belt shouldnot be permeable enough to'permit of the passage lengthwise through it of damping liquid from the fountain when thepres's-isnot in operation, as in such a case thebelt would .drawoif thedamping liquid from the fountain; and cause it to drip upon the mechanism of the press or upon the paper or'the web. The form of belt which I prefer and which gives satisfactory results without any drawing on of the damping liqnid from the fountain or any dripping, referredto above, consists of a layer of impern eable materialsuch, for instance, as rub ber, faced with oneor more layers of permeable material, such as felt. In practice Iprefer to make the belt of three layers -an inner jimpermeable layer ofvrubberand a thin surface permeable layer on each side-of the rubber'as, for instance, of felt; S-ucha belt is readily moistened by the damping liquid while passing through the fountain and conveys-the liquid in sufficient" quantity to the dampingrollers when brought; into contact with it without anyunnecessarydrainagefof the liquid from the foun-tainand without any drip- P g 0f he damping liquid upon the mech an ism of the press.

a a By means of my improveddevices I amenabled'to supply, to the damping-rollers, with greater certain ty' and exactness an amount of dampin g liquid suited to produce the best re sults in lithographic printingand to avoid jboth a scarcityand alsoan excessof such liquid,'and 'I am thus enabled to prevent the injurious results, referred to above, that flow from either such an excess or a scarcity.

As my improved devices are automatic and are accurate,reliable, and certain in operation and need little supervision, they are of special value in multicolor-presses, where the parts of the mechanism are numerous, complicated in character, and small in siz'e,where the printing is rapidlyperformed, and where printing is taking place simultaneously in many different places, so that constant supervision andregulation of the action of the damping mechanism, so necessary in the -mechanism' now employed in lithographic J presses, cannot be maintained.

,Theterm' lithographic as usedin the spec'ification'and claims herein is employed in its broad sense of planograph-ic to include any printing by the lithographic process or by any printing-surface adapted for printing -lithographi'cally, whether such printing be done, by or such printing surface be stone,

metal, or any other su'rfacec'apable ofi printin g by the lithographic process,-ias distinguished from printing by an intaglio or raised surface, or whether such lithographic-printing surface be fiat, curved, or cylindrical.

Many modifications may be made in the above-described apparatus without departing from my invention. Thus the form and material of the belt maybe varied. The means for imparting motion to the belt maybe widely varied. The construction and arrangement of the fountain and the means for supplying it with damping liquid and means for oscillating it may also be widely varied.

What I claim as new, and desire to secure by Letters Patent, isr 1. In a lithographic press, the combination of a damping-roller, an oscillating fountain for holding damping liquid adapted to oscillate to make contact intermittently with the damping-roller, means for oscillating said fountain to cause it to make contact intermittently with the dampingroller, a roller mounted inside of said fountain, an endless belt adapted to pass inside of the fountain and around the roller therein to be there moistened with dampingliquid, and to pass thence outside of-the fountain and around that part of the periphery of the fountain that comes into contact with the dampingroller, and means for imparting motion to the belt,whereby damping liquid will be conveyed from the fountain to the damping-roller.

2. In a lithographic press, the combination of a damping-roller, an oscillating fountain for holding damping liquid adapted to oscillate to make contact intermittently with the damping-roller, means for oscillating said fountain to cause it to make contact intermittently with the damping-roller, a roller mounted inside of said fountain, an endless belt adapted to pass inside of the fountain and around the roller therein to be there moistened with damping liquid, and to pass thence outside of the fountain and around that part of the periphery of the fountain that comes into contact with the damping-roller, means for imparting motion to the belt, whereby damping liquid will be conveyed from the fountain to the dampingroller, and means for supplying the fountain with damping liquid.

3. In a lithographic press, the combination of a damping-roller, a fountain for holding damping liquid, aroller mounted in said fountain,an endless belt passing around said roller and driven by said roller and adapted to be moistened with damping liquid, while thus,

passing around the roller, and passing thence outside of the fountain and adapted to convey damping liquid from the fountain to the damping-roller, and means for intermittently driving said roller actuated by the driving mechanism of the press, whereby intermittent motion will be imparted to the belt and damping liquid will be conveyed by it from the fountain to the damping-roller.

4. In a lithographic press, the combination of a damping-roller, a fountain for holding damping liquid, a roller mounted in said fountain, an'endless belt passing around said roller and driven by said roller and adapted to be moistened with damping liquid, while thus passing around theroller, and passing thence outside of the fountain and adapted to convey damping liquid from the fountain to the damping-roller, a ratchet-wheel secured to said roller, and a pawl intermittently actuated by the driving mechanism of the press and adapted to engage the ratchet-wheel and to intermittently rotate said roller, whereby an intermittent motion will be imparted to the belt and damping liquid will be conveyed by it from the fountain to the damping-roller.

5. In a lithographic press, the combination of a damping-roller, a fountain for holding damping liquid, aroller mounted in said fountain,an endless belt passing around said roller and driven by said roller and adapted to be moistened with damping liquid while thus passing around the roller, and passing thence outside of the fountain and adapted to convey damping liquid from the fountain to the damping-roller, a ratchet-wheel secured to said roller, and a pawl adapted to engage therewith mounted upon an oscillating arm actuated by the driving mechanism of the press, whereby intermittent motion will be imparted to the belt and damping liquid will be conveyed by it to the damping-roller.

6. In a lithographic press, the combination of a damping-roller, a fountain for holding the damping liquid, a belt for conveying the damping liquid from the fountain to the damping-roller, and means for imparting mo tion to the belt, and means for regulating the length of movement of the belt, whereby the amount of damping liquid conveyed by the belt from the fountain to the damping-roller may be regulated.

7. In a multicolor lithographic press, the combination of an impression-drum, a series of printing-cylinders and inking mechanisms therefor, a series of damping mechanisms each including a distributing-roller, a fountain for holding damping liquid, a belt for conveying the damping liquid from the foun tain to the distributing-roller, and means for imparting motion to the belt, means for regulating the length of movement of the belt, whereby the amount of damping liquid conveyed by the belt from the fountain to the damping-roller may be regulated, asupply- .pipe for supplying liquid to the fountains, and

an overflow-pipe for removing waste damping liquid.

8. In a lithographic press, the combination of a damping-roller, a fountain for holding damping liquid arranged and adapted to oscillate so as to make contact intermittently with the damping-roller, an endless belt of suitable material connected with the fountain and arranged and adapted to enter the fountain to receive damping liquid therefrom,

and also to pass around that portionof the outer surface of the fountain which makes, contact'with the damping-roller, means for; oscillating the fountain and means for im parting motion to the belt, whereby' damp ing liquid will beconveyed from the fountain to V the dampingroller.

enter the fountain toreceive damping liquid therefrom and to make contact with the damping-roller, means for imparting motion to the belt, and means for causing the belt to makecontact with the damping-roller. a

10. Inalithographic press, the combination 7 B of a damping-roller, a fountain for holding dam-ping liquid arranged and adapted to oscillate, means for oscillating the fountairnan.

endless belt ofsuitablematerial adapted toenter the fountain to receive damping liquid therefrom and to make contact intermittently with the damping-roller,-means for imparting motion to the belt and means for causing the.

belt to make contact intermittently with the damping-roller. I I 11. Inalithog-rap'hic press, the combination of a damping-roller, a fountain for holding damping liquid arranged and adapted to os' cillate, means for oscillating the fountain; an

endless belt of suitable material adapted-to enter the fountain to receive the dampinglliquid therefrom and to make contact intermittently with the'danlping-roller, means for im- .f

parting motion tothe belt, means for regulating the speed at which the belt moves, whereby a greater or smaller quantity of damping liquid willbe conveyed from the" fountain to the damping-roller, and means for causing the belt to make contactintermittentlywith the damping-roller.

ofadamping-roller, a fountain for holdmg 12. In a lithographic press, the combination of. a damping-roller, a fountain for holding the damping liquid, a belt for conveying the dampingliquidfromthe fountain to the damping-roller, means for'impartin'g an intermita tent motion to th'e belt actuated by the driv-' ing mechanismof the press, and means for regulating the length of movement :of the belt,

whereby the amount of damping liquid conveyed' by thebelt from the fountain tothe damping-roller may be regulated.

13. In alithographic press, the combination {of a damping-roller, a fountain'forhol'ding damping liquid arranged and-adaptedto oscillate, means for oscillating'the fountain, a j roller mountedin said fountain, an endless belt 'pass'in g around said roller and driven by said ,roller and adapted to be moistened with damp- }ing, liquid while thus passing around the roller, and passing thence outside of the fountain and adapted to, convey damping liquid from the fountain to the damping-roller, a ratchet-wheel secured to said roller,-and a pawladapted to engage therewith, acamlactua-t'ed by thedriving mechanism of the press,"swingfling links by which said cam is supported so-as to be free to swing,an oscillating arm actuated by'the cam to have an oscillating movement, andadj ustable connections between theoscillatingarm and the pawl whereby the e-Xtentof i'the stroke of the pawl can be varied, the 1ength of movement of the-belt beregulated and the amount of damping liquid conveyed by the belt from the fountain to-thedamping- 1 roller may be regulated without interfering f with oscillation of the-fountain.

of a damping-roller, a fountain for holding damping liquid, a roller mounted in said foun- I ,15. In a lithographicpress, the combination tain,a belt for conveying dam-ping liquid from the fountain to the damping-roller, passing inside of the fountain and'around theroller to be moistened with damping liquid, and

make contact with the damping-roller, a tape secured to the ,belt and" having holes in it, and pins upon the roller adapted to project through v r the holes for imparting motion to the belt, whereby damping liquid will be conveyed from thefountain ,to thedampi-ng-roller.

' 16. In alithographic press, the combination of a damping-roller, an oscillating fountain thence passing outside of the fountain to name to this specification in the presence of two subscribing witnesses.

EDWARD HETT.

Witnesses:

GEO. W. MILLS, J12, EDWIN SEGER.

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