US124460A - Improvement in printing-presses - Google Patents

Description

Printing Pre55 4 Shee'cs--Sheetl Patented March 12, 1872..

s. D. TUCKER.' No. 124,460.

S. D. TUCKER. Printing Press. 4 SheeS--Shei 2- Patented March 12,.1872.

Print-ing Press,

4 Sheets--Sheet 3Q Patented March 12, 1872.

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ArEN'r STEPHEN D. TUCKER, OF NEW YORK, N. Y.

Specification forming part of Letters Patent No. 124,460, dated March 12, 1872.

Specification describing certain Improvements in Typographic and Lithographie Printing-Wlachines, invented by STEPHEN D.TUCK ER, ofthe city, county, and State of New York.

The first part of my invention consists in mechanism for stoppin g, holding, and starting the impressioi'i-cylinder of an ordinary stopcylinder printing-machine5 the object being to hold the cylinder in proper position during the backward movement ofthe bed, so that it shall gear with and start correctly with the bed on its forward travel. rlhe second part of myinvention consists in mechanism by which the bed and form can be caused to run two or more times to each sheet printed; the object of this part being to enable the form to be brought under the inking-rollers two or more times when it is required to ink it more thoroughly. The third part of my invention consists in an arrangement of mechanism by which the impression-cylinder can be thrown out of action while the machine is in motion, and the mechanism is so constructed that it will not act upon the cylinder except at the proper times. rlhe fourth part of my invention consists in mechanism by which the movements of the inkfountain roller, the fingers, drop-arms, register-points, and sheet-hier are controlled, so that they may be prevented from operating when thebed is running two or more times to one impression, and only allowed to act but once to each sheet printed. The fifth part of my invention consists in an arrangement of adjustable feed-guides for obtaining register of the sheet without the use of register-points.

Description of the Dra/wing.

Figure lis a side elevation of a printing-machine with my improvement-s. Fig. 2 is an end elevation of the same taken from the righthand side of Fig. l. Fig. 3 is a top view of a portion of the machine with the impressioncylinder removed, showin g the arrangement of the inking and distributing` rollers. Fig. et is a side elevation, partly in section, of that portion of the mechanism which arrests the motion of the impressioncylinder, holds it while the bed is traveling backward, and starts it at the proper time when the bed commences its forward movement. Figs. 5 and G illustrate the mechanism employed to cause the bed to travel backward and forward two or more times to each impression. Figs. 7 and 8 show the form and arrangement of the mechanism by which the motion ofthe cylinder can be arrested at the proper time, and the bed allowed to run without the cylinder as long as required. Figs. 9 and l0 show the arrangement ofthe inking and distributing rollers. Figs. ll and 12 show the mechanism for regulating the supply of water from the reservoir to the damping-rollers. Fig.13 shows the arrangement ofthe means employed to arrest the motion of the fingers of the impression-cylinder. Figs. 14, l5, and 16 show the construction and the method of operating the feedguides for obtaining register of the sheet.

General Description.

A is the bed of the machine, and B B are the side frames. The ribs C C form the track upon which the type-bed D runs. E is the impression-cylinder, held in bearings in the side frames, and operated by .the toothed wheel F, driven by the rack G on the bed D. H is the driving-shaft, with a pinion, l, secured upon it which gears into and drives the wheel K. One end of the connecting-rod M is jointed to the crank L on the end otl theshaft ot' the wheel K, and the other end is forked, so as to embrace and be connected to theaxle of the toothed wheel N. As the crank-wheel K revolves it gives a backward-and-forward rolling motion to the wheel N. This wheel gears into a rack, O, bolted to the bed-plate A, and also into a similar rack, P, secured to the under side of the type-bed; and as the wheel N rolls back and forth upon the fixed rack 0 it imparts a reciprocating motion to the bed D. The extent of this motion is just double that of the wheel N. The circumference of the impression-cylinder is equal to the travel of the type-bed in one direction. It is driven by the action of the gear G on the bed D, the' teeth of which gear with the toothed wheel F. In order to prevent a retrograde motion of the cylinder when the bed is about to make its trav'el backward, the teeth of the wheel F, that would be in gear with the rack Gr at this time, are cut away so that the bed moves under the wheel F without turning it, and leaves the cylinder stationary; but to insure the complete revolution ot' the cylinder before it stops, to hold it while the bed returns, and to start it forward at the proper time, so a-s to gear correctly with the rack Gr, the following mechanism, shown in Fig. 4, is employed: A catchtooth, 1, is bolted to the side of the cylinderwheel F, and acatch-lever, 2, to operate this tooth is jointed tothe side frame at 3. One end of a connecting-rod, 4, is jointed to this catch-lever 2, and is provided with a hookshaped notch, 5, near the other end, which lits over a pin, 6, in the upright arm 7 of a threearm cam-lever, Q. This lever is Xed on the shaft 8, which turns in bearings secured to the frame 5 and the two arms 9 10 have frictionrollers upon their ends running in contact with the cams 11 12 secured upon the crank-wheel shaft. These cams are so adjusted upon the shaft and are so shaped that just as the bed and cylinder are together completing their forward movement they act upon the lever Q, to draw the catch-lever 2 into gear with the catchtooth l on the cylinder-wheel, and bring the cylinder to the proper stopping-point. The cams then act, through the catch-lever 2, to hold the cylinder stationary while the bed returns, and then start it forward so that the cylinder-wheel shall gear correctly with the rack. While the cylinder and bed are again moving together the catch-lever returns to its former position to be ready again for the catchtooth. The fingers R, which seize the sheet to be printed, are so placed upon the impressioncylinder that when it is stationary they are about over its center, as in this position they can the more conveniently receive the sheet from the feed-table. The space in front of the impression-cylinder traversed by the bed is occupied by the form-rollers S S for iuking the form, 'and when it is required to subject the form to a more thorough inking the bed is caused to run backward and forward beneath the rollers twice to one movement of the cylinder, by the following mechanism:

A broad-faced pinion, 13, fixed on the crankwheel shaft, gears into a wheel, 14, of twice its size, ruiming loose on the shaf't of thelever Q. This wheel has a lifting-cam, 15, on its side, and a friction-roller, 16, fixed to the lifting-rod, 17, runs on it 5 the lower end of this rod, 17 is forked to embrace the shaft S, and the upper end is jointed to the connecting-rod 4. As the wheel 14 revolves it causes the cam 15 to act upon the rod, and alternately raise the connecting-rod 4 up from and drop it down upon the pin 6 in the upright arm of the camlever Q. During the ret-urn of the type-bed, after printing a sheet, and while the impression-cylinder is held stationary by the connecting-rod and catch-lever, the cam 15 is brought under the roller 1G, and acts upon the lifting-rod 17, to lift and hold up the connecting-rod 4from the pin 6, so that as the bed commences its forward movement the cams 11 and 12 draw forward the cam-lever Q, without giving any motion to the connecting-rod and catch-lever. The end of the connecting-rod 4 is furnished with a stud, 1S, which fits into a slot in the piece T, bolted to the side frame,

when the cam-wheel 14 lifts the connectingrod 4 olf the cam-lever pin 6. This holds the rod 4 stationary, and prevents the cylinder moving accidentally, while the connecting-rod 4 is raised from the cam-lever 0. When the bed and form are returning the second time backward, the cam-wheel 14 drops the lifting-rod 17 and causes the hook 5 of the connecting-rod 4 to drop upon the pin 6 of the cam-lever Q, so that, as the bed commences its forward movement, the cylinderwheel F is thrown into gear with the rack on the bed, and the cylinder revolves with the forward motion ofthe bed. A spring, 19, `joined to the connecting-rod 4, by the rod 20, insures the dropping of the connecting-rod onto the pin (i on the cani-lever.

If it is required to run the bed backward and forward three or more times to each sheet printed, the wheel and pinion, 13 a-nd 14, described above, must be removed and others of the proper proportion substituted, and the shape of the cam 15 also altered to suit. When a sheet is printed at every forward movement of the bed, the cam-wheel 14 is pushed back on its shaft until the cam 15 is out of contact with the friction-roller 16 on the liftingrod 17; but the wheel 14 always remains in gear with the pinion 13.

If it is required to run the bed many times without printing, it may be done by raising the connecting-rod 4 up until the stud 18 fits into the slot in the piece T, and then putting apin under it. This keeps the connecting-rod 4 from being operated bythe cam-lever Q, and causes the cylinder to be held stationary as long as required.

To enable the impression cylinder to be thrown out of action while the machine is running tlie following'mechanism is used: A treadle-shaft, 21, runs across the machine having a treadle, U, eonven ient to the foot of the feeder, and also provided with a handle, if required, at the other side of the machine for the assistant. An arm, 22, is fixed on this shaft, having at its extremity ajointed rod, 23,;(see Fi'O. 7,) running upwards through a guide screwed to the frame, and ending just clear of the under side ofthe connecting-rod 4, and when the treadle is pressed down by the feeder the rod 23 lifts the connecting-rod 4 up from the pin 6 in the arm of the cam-lever Q, and raises the stud 1S into the slot in the piece T, and the cylinder remains stationary. But to prevent the connecting-rod 4 being lifted at the wrong time, another arm, 24, isfixed on the treadleshaft, having at its extremity a jointed rod, 25, running up and forked to embrace the shaft of the crank-wheel K. This rod 25 plays up and down just in front of a disk, 26, keyed to the shaft, upon whose face a projecting ledge, 27, is formed, ruiming a little more than half way around its circumference, and terminating in a sharp edge at each end. A short projecting lip, 2S, also sharp at the ends, is fixed on the side of the rod 25, next the disk, and the motion given to the rod 25 by the treadle is such that the lip can work sometimes below and sometimes above the ledge 27. The position of the disk 26 on the shaft is such that, Vwhile the cylinder E is in motion, the ledge 27 is passing over the lip 23, and acts to hold the rod 25 down, and prevent a-n y movement ofthe shaft 2l and rod 23, so that the connecting-rod 4cannot be lifted up out of action with the lever Q while the cylinder and bed are printing. As soon as the cylinder has completed its revolution, and the bed has commenced to return, the disk 26, which is continually turning with the shaft of the crank-wheel K, will be in such a position that the lip 28, on the forked rod, will pass betweenthe edges of the ledge 27, and allow the shaft 21 to be turned, so that the. rod 23 will be raised and lift the connecting-rod 4 olf the pin 6, and bring the stud lS into the slot in the piece T. At this point the ledge 27 will pass under the lip 2S, and hold-the rod 23 and the connecting-rodet up until the bed has commenced to return, when the ledge on the disk 26 will pass from under the lip 2S, and the foot having been in the meantime removed from the treadle U, the lifting-rod 23 will be forced down by the coilspring around it, and allow the connecting-rod 4 to drop again upon the pin 6, in the arm of the cam-lever Q, ready for action as before.

Figs. 7 and S of the drawing, show clearly the arrangement of this mechanism. By its use, the connecting-rod 4, and, consequently, the cylinder, can only be thrown out of action while the cylinder has stopped and the bed is returning; and when thus thrown out of action they can only be brought into it again while the bed is makin gifs return or backward movement.

The form-hiking rollers S S turn in the adjustable bearings 29 29, secured to the roller brackets V V by set-screws. Each pair of' rollers has a vibrating roller, 30, placed partly above and partly between them. The vibrating rollers 3() are driven from a rack, W, on one side of the type-bed, through a-n intermediate pinion, 31, which runs loose on the stud 32, and gears with the pinion 33 on the vibrating-roller shaft, and with the rack W. The vibrators 3() are made to move endwise by means of an upright shaft, 34, operated from the grooved cam 36 on the shaft X. The lower Y end of the upright shaft 34 has an arm, 35, se-

cured to it, provided with a friction-roller, which runs into the groove in the cam 36; and the upper end of the shaft has a two-armed lever, 37, secured to it, each end of which takes into a grooved collar, 33, on the outer end of the shaft of each roller 30, and the operation of the shaft 34 causes one vibratin roller to move in an opposite direction from its neighbor-th at is, when one roller is vibrating or moving inward the other is moving outward.

If more inking and vibrating-rollers are used, they may be operated by additional upright shafts connected with the upright-shaft 34, and actuated from it by means of arms and a connecting-rod.

The inkin g-rollers S are held in the adjustable bearings, and are so arranged with relation to the vibrating-rollers 30, that they can be quickly and accurately adjusted laterally as they decrease in size from wear, by loosening the set-screws of the bearings 29, and moving them into the proper position. By lifting the vibrating-roller. 30 out of the bearings in the bracket V, the hiking-rollers can be readily removed'from the machine without disturbing the bearings 29.

When the machine is double-rollin g 7-tl1at is, when the bed is running back and forth twice to each sheet printed-it is often desirable that the fountain-roller, the iin gers, droparms, and sheet-Hier should operate but once to each impression. To accomplish this a shaft, Y, is placed below and parallel with the shaft X, having an arm, 39, fixed upon it, which is held in contact with and receives motion from a cam, 40, on the side of the wheel 41. This wheel runs loose upon its stud in the bracket 42, and gears with and is driven by a pinion of half its size secured on the shaft X, so that the wheel 4l makes but one revolution to two ofthe shaft X, and the `shape of the cam 40 is such that at each revolution it causes the shaft Y to turn slightly back and forth. A series of short arms, one of which is shown at 43, Fig. 13, are fixed by set-screws upon the shaft Y below each of the forked rods that operate the fountain-roller, iin gers, drop-arms, &c., and act at the proper times to arrest the motion of these parts. As the bed returns after printing a sheet the lifting-cams on the shaft X raise the forked rods, one of which, operating the fingers R and the adjustable guides, is shown in Fig. 13, and the cam 40 on the wheel 4l at this moment causes the shaft Y to turn slightly and bring the arms 43 under the ends of the rods, so as to prevent their dropping down during one complete run of the bed. Vhen the bed is running back again preparatory to making its travel forward with the' cylinder, the shaft Y turns again and brings the arms 43 back to their former position, so

-that the forked rods are left free to be raised by the cams on the shaft X and operate the fingers, drop-arms, and other mechanism.

When the machine is printing a sheet at every run of the bed, the arm 39 is slipped on the shaftY out of contact with the cam 40, and when the bed is running three or more times to each sheet printed, the wheel 4l and its pinion must be changed so as to operate the shaft Y and its arms 43 at the same intervals. It will be necessary, in this case, to change the cam 40, also, f'or one of the shape necessary to operate the arm 39 properly. The movements of the sheet-flier are controlled the same as the parts described above, from the shaft Y by means of the arm 44 secured on the shaft.

Vhen the machine is used toprint from a lithographie stone, the wetting mechanism, represented in Figs. 11 and 12, is employed to damp the stone. It is composed of a Waterreservoir, Z, provided with a roller, 45, turning slowly in it and raising the water up to the taking-roller 49. The roller 45 is driven by the belt 46 from the pulley 47, on the shaft X, and the takin g-roller 49 runs in bearings in the arms 50, on the shaft 51, and is operated bythe caln 54 through the medium of theliftin g-rod 53, to raise up and take the Water from the roller 45, and then drop down and Wet the roller 60.

The quantity of water given to the dampin g-rollers is regulated by the length oi' time the taking-roller 49 is held up in contact with the roller 45, and this time is governed by the cam 52, which is made with cam surfaces of ditierent lengths, and is arranged to slide upon and turn with the shaft X by a feather, 54, runningin a groove, 55, in the shaft. This permits the cam 52 to be moved so as to bring a different surface beneath the roller 56 on the rod 53.

IThe means for setting and holding' the cam upon the shaft X is shown in Figs. 1, 11, and 12 ot' the drawing. It consists ota rod, 57, held in bearin gs onthe side frame and fastened at one end to the collar 59, which tits loosely in a groove in the end of the cam 52. The rod 57 is provided with a handle to slide it backward and forward for the purpose ot' adjusting the cam 52 and itis secured from any accidental movement by the sliding catch 53. The taking-roller 49 drops upon and Wets the metal intermediate-roller 60, Fig. 11, and this in turn Wets the two damping-rollers 61, which are always in contact withit. These wetting'- rollers 61 are covered with any suitable elastic material, and turn in adjustable bearings to regulate their pressure upon the stone. They are driven by the rack W' on the bed through the medium of pinions lixed on their shat'ts in order to keep them constantly turning for the better distribution ,of the water, and to prevent them slipping when in contact with the stone.

The adjustable feed-guides for holding the edge of the sheet on the feed-board in proper position to be seized by the ngers of the impressioircylinder, are shown in Figs. 14, 15, and'16. They are secured upon the rock-shaft 72 by the set-screws 73, and are operated by the cam 74 ou the shaft X through thc medium of the'lit'ting-'rod 77 andlever 7S, that also operate the tin gers lt. The rocker-shaft 72 has an arm, 75, secured on it which rests upon and i is raised'by thc lever 7 S as the cam 74 lifts the rod 77. This movement acts to raise the forward ends ofthe feed-guides above the surface ofthe sheet, and hold them up until the cylinder has drawn the sheet from the teed-board,and this motion occurs immediately after the fingers have seized the sheet, so that the position of the sheet upon the feed-board is not disturbed, and a perfect register is obtained.

The feedguides are rendered adjustable by the use of thumb-screws 76, so that the guides can be quickly and very accurately adjusted to hold the edges of the sheet in proper position to be seized by the fingers 1t, and they may be adjusted While the machine is in motion. A similar set of feed-guides may be also arranged upon the side of the feed-board to control the other edge ot' the sheet.

Having thus fully described my improved printing-machine, what I claim therein as my invention, is- ,l

1. The mechanism for stoppin g, holdin `s1','and starting the impressioircy]inder, consisting of the three-armed ylever Q, the cams l1 and 12, the connecting-rod 4, the catch-lever 2, and tooth 1, or the equivalents thereof, constructed and operated substantially as described and specified.

2. The mechanism for causing the bed and form to travel back and forth two or more times to each sheet printed, consisting of the gears 13 and 14, cam 15, and lifting-rod 17, op erating the connecting-rod 4, constructed and operating substantially as described and speciiied.

3. The mechanisln for controlling the movement of the impression-cylinder, consisting of the treadle U and treadle-shat't 2l, the arms 22 and 24, the lifting-rod 23, the rod 25, with its lip 28, and the disk-cam 26, operating in connection with the co11necting-rod4, the whole constructed and operating substantially 'as described and specified.

4. The arrangement ot' the shaft Y, provided with arms 43 44, and driven by the pinion on the shaft X through the wheel 41, its cam 40, and the arm 39, for arresting and controlling the motions ot' the fingers, sl1eet-1iier,and other mechanism, substantially as described and specified.

5. The feed-guide, Fig. 1G, one end ot' which is slotted to straddle a grooved adjusting-screw 76, in combination with a friction-clamp, 7S, adjustable block 77, and rocker-shaft 72, all constructed and operating substantially as above described.

6. The multiple-cam 52, feathered to the shaft X, and controlled in its position by an independent adjustable locking device, as described, in combination with the rod 53, rocker shat't 51, conductii'ig-rollcr 49, i'ountailrroller 45, and fountain Z, for automatically regulating the supply of Water to the wetting-rollers, all constructed and operating substantially as above described.

7. The mechanism for adjustingthe variable cam 52, consisting ofthe rod 57, catch 5S, and collar 59, constructed and operating substantially as described and speciiied.

STEPHEN l). TUCKER.

Witnesses:

STEPHENS. Hon, ALEXR. W. FYFE.

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