US108785A - Richard i - Google Patents

Description

.Nitrit-in- S'rr Itltll'All) M. .llOE AND STEPHEN '1). TUCKER, OF NEW YORK, N. Y.

IMPROVEMENT EN .PRINTING-PRESSES. Y

Siwcilication forming part ol' Lrttcrs Patent No. I'-fa', dated November 1, 1870.

To all whom it may concern.'

lie it known that we, RICHARD M. IIOE and STEPHEN D. TUCKER, of the the city, county, and State of New York, have invented certain Improvements in Printing-Machines, of which the following is a specification:

Uur invention consists in certain new coi .-1 binations and arrangements of parts, whereby we are enabled to make an improved printingmachine, as will be hereinafter fully set forth.

Figure l is an elevation of theV machine, showing'that side which is at the righthand in Fig. Fig. 2 is an elevation of the opposite side of the machine.` Fig. 3. is an end elevation of the machine at the right hand in Fig. l. Fig. 4 is a view of one ofthe geared form-inkin g rollers. Fig. 5 is a vertical transverse section of the type-bed and the inking and riding rollers, taken through the line-x x, Fig. 3. Fig. 6 is a vertical'transverse section of the hiking-rollers.

A A are the side frames, mounted upon the bed-plate A', and constructed to properly support and resist the vibrationsof the operative parts. 59 59, Fig. 3, are two ribs, which are supported by the side pieces and extend the full length of the frame, forming the track upon which the type-bed 57 runs. The mechanism by which this type-bed, which carries the form, is impelled back and forth consists of the rack 4, secured to the bedplate, the rack 48, fixed to the under side of the type-bed, and the toothed wheel l, which {ills-the space between and gears into these two racks. The forked ends of a connectingrod, U, are attached to the axle S of this toothed wheel, and the opposite end is jointed to a wrist-pin, T, in the toothed wheel 2. This wheel is driven by a pinion on the driving-shaft F.

New, the rack 4, secured to the bed-plate, being immovable, it follows that, as motion is imparted to the toothed wheel 2, the type-bed 57 will be moved back and forth. If the connecting-rod U were attached to an axle in the center of the wheel l, the rack 48, and, of course, the type-bed 57, would move at just double the speed of the axle, and with an evervarying motion derived from the crank T; but if the axle be placed eccentrically in the wheel and the connecting-rod attached to it, then when the axle is above the center ofthe wheel during its rotation the upper rack and typeof the axle; whenit is level with the center they will move atju'st double the speed; when ,below the center they willmove at more vthan 'double the speed. These' variations of speed will be more or less, according as the axle is placed more or less eccentrically in the wheel 1.

Iuthis machine advantage is taken of 'this principle of construction by so combining the eccentricity` of the axleS with the position ot' the -wheel l as 'to retard the motion of the type-bed 57 when the crank T is at its halt-4 stroke, and to increase its motion when the crank is approaching the dead-points. A nearly-uniform motion is thus given to" the type-bed while theform is passing under the' impression-cyiinder 60S The circumference of this eylinderis just equal to the travel of the type-bed in one d irection. lt is driven forward bya rack, 43, bolted to one side of the type-bed, which gears into a toothed wheel, 41, securedto one end of the cylinder 60; and, in order to prevent a retrog'ade motion of the cylinder when the motion of the type-bed is reversed, the teeth of the cylinder-wheel 4l are cut away at the point that would be in gear with the rack when the 4bed arrives at'the end of its travel, so tha-t thebed returns and leaves the cylinder stationary; but to assure the perfect completion of the revolution of the cylinder,.to hold it stationary while the bed returns, and 4to start it forward at the proper time so as to make the wheel4l gear correctly with the rack 43, a toothed segment, 44, is bolted to the side of the cylinderwheel, and a'sector-lever, 13, provided with a toothed segment, 45, is jointed to the vside frame of the machine at It, the sector-lever being operated through the connecting-rod l1 by the cams 9-10, secured to the shaft J of the crank-wheel 2. One end of the connecting rod l1 is formed of a hook-shape, and fits over the stud 23 on the sector-le-ver, and the other end is slotted and slides over` the shaft J, and is furnished with two friction rollers, 17 le, against which the cams 9 10 revolve. rlhe sha-pe of these cams and their postionon the shaft J is such that just as the type-bed and cylinder 'are together arriving` at-the end of their forwardmovement, the teeth 45 of the sector-lever are drawn into gear with those of -the segment 44 on the cylinder-wheel, and the' 2 leerme cylinder is brought to the proper stoppingpoint. 'The sector-lever also holds the cylinder stationary while the type-bed returns, and then starts forward, so that the cylinder-wheel 41 gears correctly into the side rack 43, and while the cylinder and type-bed are again making their forward movement the sector-lever returns, so as to be again in position to gear into the segment 44. y

-form, andas the bed and cylinder start together the bed will have traveled the same distance. They will have an equal distance yet to travel before the bed will have completed its stroke and the cylinder its revolution, and this determines the largest form that can'be printed on the macl1ine`,las when the cylinder stops the lower end of the sheet must be lifted entirely clear of the form.

rEhe space in front of the cylinder that is traversed by the bed is occupied by the roll ers X, that ink the form; but for ordinary printing the number of rollers required may occupy aless space than equal to` one-half the circumference of the cylinder. In that case additional speed of the machine is obtained by shortening the travel of the bed in front of the cylinder until the form j ust passes beyond the inking-rollers and then returns, while the cylinder, fromits having a greater distance to travel, is caused,by the action of the cams 9 10, connecting-rod 11, sector-lever 13, and segment 44, to start forward a cert-ain distance in advance of the bed and then fallin gear and run with it.

For the better kinds of printing the number of rollers required will sometimes occupy a greaterspace than equal to one-half the cireum# ference of the cylinder. The travel ofthe bed in that case is len gthened in front of the cylinder only until the form just passes beyond the inkingfrollers; andas the bed will have a greater distance to travel, it might then conimence to return in advance of the startingcylinder; but as the bed would be moving with a constantly-increasing speed, it would be diicult to make the cylinder, through the action of the cams, `sector-lever, and segment, attain an equal speed, so as to gear into the rack of the type-bed without a shock. We therefore prefer to increase .the size of the cylinderuntil its half-circumference is equal to the space occupied by the inking-rollersX-, so that the bed and cylinder can start slowly together, and the ingersat 61 will be in proper position over the center of the cylinder to receive the sheet from the feed-table.

When the cylinder and bed have' met each other, the former will have made just half a revolution and will have the balance of its revolution yet to make; but the travel of the bed having been increased only in front of the cylinder, it follows that, when it has niet the cylinder, it will have traveled over more than half its dista-nce, and the remainder of its travel will not be sufficient to make the cylinder complete its revolution. rlhe sector-lever 13, therefore, is operated by the cams 9 and l() at this time, so that its segment 45 gears into the cylinder-wheel segment 44, and the cylind'er is carried around to finish its revolution and bring the lingers at 61 again to the proper l point.

Additional inking-rollers Z are placed in front of the rollers X,when required; but as they would ink but-a portion of the form, an

additional set,-Y, are placed behind the cylinder, which ink the remaining portion of the form. In this way the form can receive ad-` ditional inkin g.witl1out the travel of ,the bed being increased or the speed of the machine diminished.

When it may be necessary to subject the form to a further inking process, the bed is caused to run back and fort-h'twiee to one movement of the cylinder 'by the following mechanism: A pinion, 62, fixed on the crankwheel shaft J, gears into a toothed wheel, 3, of twice its size, keyed on the shaft O. This shaft runs lin bearix'igs 35, bolted to the bed-plate, and carries a grooved cani, 5, fitted to slide on a feather in the shaft and held by a set-screw. The lower end ot the bent lever 12, that is pi'voted at 31 to a support, 63, secured to one ofthe ribs, carries a roller which runs into the grooved cam 5. The upper endet' the lever 12 has two projecting rollers, 21 22, and between these the end of the connecting-rod 11 y slides. Therefore, as the cam 5 slowly revolves under the actionof the vwheel and pin ion 5 and 62, the form ofits groove is such that the bent lever 12 causes the connectingrod 11 to alternately rise oit' of and drop over the stud 23 in the sector-lever.`

During the return f the type-bed, after a sheet has been printedand whilethe cylinder is held stationary by the connecting-rod and sector-lever, as before described, the connect ing-rod is lifted oi' the stud 23 by the cam 5, so that as the bed commences its forward movement theconnecting-rod ll is drawn forward by the cams J 10 without moving the sector-lever, and the cylinder Aremains stationary. After the bed completes its forward movement, and during the time it isreturnin g again, the cam 5 drops the connecting-rod over the stud, and the bed and cylinder coinmence their forward movement, as before.

'lo prevent the cylinder being accidentally turn ed While the connecting-rod is disconnected from the sector-lever, the end of the bent lever 12 is formed at 20 in the shape of a hook, so that as it lifts the connecting-rod'oti the stud in the sector-lever the hook rises over it and grasps it from below. When the conncetin g-rod is brought down over the stud 23 the hool; 20 recedes from it, and the sector-lever is left to be acted upon by the eonneetingrod It' it required to cause the bed to run three or more times to one revolution of the cylinderthat is, to one sheet printedthen the wheel 3 and the pinion 62 must be in that same proportion to each. other, and the form of the eroove in. the cam 5 must consequently be slightly varied to operatel thebent lever 12 with the proper intervals.

The shafts a of the riding' rollers and those of the hiking-rollers turn in adjust-able bean ings c, which slide in suitable recesses in the 'supports l), and are adjusted to the proper height by the se* screws d.

The form-in me; rollers 55 are litted-with toothed drivin g--vvheels 47,. Fig. 4, which gear nto a rack, 46, on the side ofthe type-bed 57, ivy which they'are driven. lf these rollers are constructed of such material that they will not decrease in size by wear, only one wheel will be required to each roller, but it' they do decrease iu sive, then two or three chan rre-wheels, having, say, one tooth diftiirence in each to agree with the size of the roller, may berequircd. ,The hiking-rollers are thus made to revolve with a positive motion, and riding rollers 5l can be placed upon them to increase the distribution ot' the ink without retarding,r

heir motion, as would occur if they were driven by surface-contact alone.

The toothed wheels 47 are placed loosely on the roller-shafts, and are held by feathers o, fixed in the shafts; but the grooves in the wheels are made wider than the feathers on which they fit, so that the rollers can turn backward and forward a certain distance independent of the shafts, some more and some less, as maybe required.. Consequently,when the type-bed has arrived at the end ofi'ts stroke in either direction and commences its return, the rollers will remain stationary until the toothed wheels have revolved the limit of the v side play allowed by the grooves, and a new surface will thus be presented to the forni of type.

rlhe hiking-rollers have also frictionrollers lr fixed on their shafts, one at each end, that run on tracks or bearers l, laid at each side of the type-bed. rlhe surfaces ot' the rollers la and tracks .'.arc covered with leather, rubber,

A receivingcylinder, 42, is placed just be hind the im]iression-cylinder,the bearings I ot' which are supported in the frame-E, which holds ythe feeding-table. It is driven by a toothed wheel, which gears into a similar wheel on the impression-cylinder. -The sheet of paper, as it is printed and. drawn ott' the form by the impression-cylinder, is taken by the` fingers of the receiving-cylinder and delivered to the sheet-flier 5l.

llfhcn the bed is running;` twice to eaelrinn pression, the sheet-flier 51 is caused to operate only at every second run of the bed, the mechanism by which this is produced consisting of the following,r parts, opera-ting as follows: A cam, lil, fixed on the outer end of the shaft 0, operates a catch-lever, 15, pivoted to a plate on the sideframe at Q. A projection on this lever, catching under the segment-lever 14, after it is raised by the fly-cam 8, holds up the tly during one complete -run of the typebed.

When the bed is runnin ,fr onlyonce to cach impression, the cam. l?) is removed from the shaft O and the sheetier is operated by the cam 8, in the usual manner.

At each side of the machineis placed a T shaped piece, 38, forliftinf',rv the inkingrollers up clear from the form and inkingltable. 'lhe horizontal arms are j ust below the shafts of the inking-rollers, and the "vertical stems are held in slots on the side frames and rest on eccentric-shaped cams, 30, secured to a shaft ex tending across the machine. Each end of this shaft is provided with a lever, 40, by turning.;l which the rollers can be raised or lowered from either side of the machine.`

N 'is a'shaft running lengthwise of the machine and held in bearings on the side frame.

It is driven by a worm on the drivin geh-aft F working into awheelon the end of the shaft.; and the worm and wheel are so proportioned as to cause the shaft to make one revolution to every revolution of the crank-Wheel 2'. This shaft carries the cams 6 7.. 56 are vibrating rollers for redistrilouting` the ink on the inl;-

.ing-table 65, Fig. 5. They turn in adjustable bearings c, sliding in recesses in the yframes of the machine, and are adjusted to the proper height by set-screws (l. 'lhey turn simply by their contact with the hiking-table, and are' caused to operate with a lateral reciprocating` movement back and forth, each in a direction oppositeto that of its neighbor, by means ot the rocking levers 25 26, the lower ends ot' which are actuated by the double cam 6 on the shaft N, lhe lever 26 is fixed tojits shaft, held in the bearings 34,.and from tl'fe'shat't a branch, 33, projects upward tov every second roller, whilel the lever 25 rocks freely on the shaft, and has its' upper end also branched to every intermediate roller. rlhe ends of thesebranches take into grooved collars e on the outer ends of the roller-shafts. l

The riding rollers 54, that lie on and turn by Contact with the rollers 56, are held in movable bearings c, but have no lateral mo- 'i tion, so that the rollers 56 reciprocate both against the inking-table'and against these riding rollers. The riding rollers that lie ou l; mensa and are driven by the form-rollers 55 have a lateral reciprocating' movement given to them h v means of the rocking levers 24 32, operated by the double cam 6 on the shaft N in the same manner as the distributing-rollers 56.

The mechanism for receiving and distributing the ink is arranged and operates as follows: The inl; is received from the fountain 71 by the taking-roller 68 and deposited on the distributing-cylinder 66. The shaft `Gr is held in bearings in the frame C, which is also arranged to support the shafts of the otherrollers, and the cylinder receives motion from a pulley on one end of this shaft, to which motion is communicated,through the belt 53, from the pulley on the drivingshaft- F. The other end ofthe cylinder-shaft has a short right and left hand screw, 36, working,r4 in a forked nut, 37, which imparts to thev cylinder a slow lateral reciprocating motion.

Other rollers, 70, having theirbearings at g in the side frames (l, are placed around the cylinder to aid the distribution of the ink.'

Another takingaoller, 69, Fig. 3, rises up in contact with the cylinder 66, becomes charged with ink, and at the proper time drops down and deposits it on the inkingftable 65 as the latterl passes back and forth.

The taking-rollers 68 69 both receive their rising' and falling motions from the canis 29 30, the former raising,` and lowering the stem 28, which operates the bent bearings 67 of the roller 69, and the latter perforinilng` a similar oiiice to the stem 27, which operates the bearings 67 of the roller 65. Both of these bearings are pivoted in the side frames at jj, and

that one, 67, the taking-roller 69, is controlled' by a set-screw, t', so that the extent of its motion may be regulated as required, and the roller adjusted to take the proper amount oi' ink from the cylinder.

1. 'The method of driving the bed of la printin g-machine, consisting of a crank, T, connecting-rod U, and a toothed wheel, 1, gearing' into a fixed rack, 4, and movable rack 4S, When the axle to which the conncctingfaed is attached is arranged eceentrically in said Wheel, so as to give a dfierential movement to the bed, substantially as described and specified.

2. So arranging; the pinions on theinkingroller shaft-s that they will have a rotary mot-ion independent of the shaft, whereby the rollers will change their position on the form at each movement thereof, substantially as described and specified.

3. The bearing-straps I, applied to the \\a,'s 57, in combination with the beari||gwl1eels k upon the inkingrollers, to admit of adjusting' the pressure ofthe rollers upon the form, substantially as described and specied.

4. Controlling the ily so that its movements shall coincide with the movement of theimpression-ovh' nder, by the mechanism and substantially in the manner described and specilied.

RIGHT). M. HOE. STEPHEN D. TUCKER. Witnesses ABRAHM'I MORRIS, JAMES BLAIR.

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