USRE11166E - Printing-press - Google Patents

Description

I 3 Sheets-Sheet 1. 1 W. SCOTT.

PRINTING PRESS.

Reissue'd May 12, 1891 3 Sheets-Sheet 2. w. SCOTT. I PRINTING PRESS.

R'eissud May 12, 1891.

' No. 11,166.v

' 3*SheetsSheet 3.

W. SCOTT. PRINTING PRESS.

, No. 11,166. Reissued May 12, 1891'.

H H #2 O 1 I 2 O a. Q

- specification.

UN TED STATES.

PATENT Or FIcE.

WALTER soo'rqor lLAI-NFIELD, NEW JERS Y.

PRINTING-PRESS.

j SPEOIFICA'FIC D N forming part of Reissued Letters ldtezit No. 11,166, dated May 12, 1891.

Original No. 425,710, dated April 16 1890. Application feif'heissne filed December 2,1890. Serial No. 373,384.

To all whom it ntay concern:

Be it known that I, WALTER Scorr, a citi zen of the United States, residing at Blainfield,in the county of Union and State of New Jersey, have invented an Improvement in Printing-Presses, of which the following is a Printing-presses have heretofore been constructed in which the impression-eylinderis raised or lowered, and such impression-cylinder is usually made use of with a reciprocating fiat bed; but in some instances the impression-cylinder is used with a revolving type-cylinder, and sometimes there are two impression-cylinders in the same press that require to be raised and lowered at the proper times for giving the impressions. In some of these presses the impression-cylinder is turned first one way and then the other. In others it is revolved continuously, and in others rotated and then stopped and raised as the bed returns.

My present invention relates to the mech anism for moving the impression-cylinder up nected with one of the impression-eylinders being removed to show the parts that come between the frames of the press. Fig. 2 is a cross-section at the line a: .mFig. 1. Fig. 3 is a digrammatie-plan of the devices that come between the frames of the press and actuate .tion at the line y yof Fig. 1.

Fig. 4 is a' see- Fig.5 is an ele-- vation of the rack-arms for actuating the such iimpression-cylinders.

toggle-links. Fig. 6 is an elevation of a p0rtion of thetype-bed, showing the rack thereon. Fig.7 is aseetional elevation representing a. portion of the type-bed, the rack sus- ---Pended therefrom, the driving-pinion for actuating the same, and Fig. 8 is a sectional plan view representing one end of the rack down, preferably, through the hollow portion of the frame from theboxes 2 to the slides 5, the parts being fitted, so that such slides 5 and boxes 2 can receive the necessary vertical movement in raising or lowering the im-' pression-cylinders, and upon the vertieal tierods at there are adjusting-nuts G, and the springs 7, resting upon the heads of the adjlisting-screws 8, serve to counterbalance the weightof the respective impression-cylinders, or nearly so, in order that the-movements of such impression-cylinders bodily and vertically may-be easily effected, andthe adjustable stop-screws 9 in the side frames A A and beneath the boxes 2 are provided for limiting the downward movements of such boxes and of the impression-cylinders.

Each of the boxes 5 is provided with atoggle, the lower link' K of which is made with a cylindrical journal 10, received into asemicylindrical recess in the top .of the box5 and held thereto by the straps ll; and thereis an arhr12, extending downwardly from the inner end of the cylinder 10, for the purposes hereinafter named. The upper link K of each toggle is provided with a journal 14, re-

ceived into a corresponding'recessin the side frame of the press and held thereto by the pivot-plates 15, and between the ends of the toggle-links K K the pin 16 is received intonearly semieirculrr recesses, and thewash ers 17 of the pin have annular and inwardlyprojeeting rims'that pass into segmental-slots in thesides of the'upper and lower togglebars, andthese washers are held by bolts or nuts-at the ends of the pins 16, so that these pins 16 receive the pressure as the toggles are straightened .and the impression-cylinders broughtdown,and upon the reverse movement as the toggles are bent the rims of the washers connect the ends of the toggles, so that they do not separate, and they will raise the impression-cylinders by the rocking or oscillating movements given to the journals of the toggles by the arms 12, even in cases where the springs 7 may not be sufficiently strong to raise the impression-cylinders, or in cases where such springs become broken.

Below the impression cylinders there are cross-shafts L L, having at each outer end a segmental rack 18, the end of which is made with" teeth gearing into similar teeth at the lower end of the arm 12. Ilence it will be apparent that when the cross-shaft L or L below either impression-cylinder is rocked or partially turned in its bearings 19 upon the base of the mainframe of the machine, the segmental racks 18 give motion to the arms 12 and either raise or lower the impressioncylinders, and these parts-are very strong and reliable and are adapted to give motion to the impressioncylinder regardless of whether there are one or two such impression-cylinders. The rack-teeth upon the arms 12 and racks 18 cannot be ares struck from the respective axes of mot-ion; but the teeth that come together when the toggles are straight are the nearest to the respective axes, because the journal 10 of the toggle is nearer to the shaft L or L when the toggle is straight.

.The diagram, Fig. 5, represents the construction of these racks 12 and 18..

, The mechanisms made use of for rocking the shafts L Li of the impression-cylinders are next described.

The shaft B receives a continuous'rotation by any suitable means, such as the gearwheel 20 to the gear-wheel 121 on the main driving-shaft E the gearing being-illustrated by dotted lines in Fig. 1,-and where the impression-cylinder makes two revolutions for in the other direction.

each impression the shaft B is to be revolved once for each two revolutions of the impression-cylinder, and where the-two impressioncylinders we are made use of, as illustrated in the drawings, it is usual to print from one of the impression-cylinders while the typebed I) and form are moved in onedireetion, and to print from the other impression-cylinder when the type-bed and form are moving For that reason it is necessary to raise the impression-cylinder a at the time the impression-cylinder a is drawn down, and the reverse. Hence I have represented the toggle as standing .in the reverse directions, so that as the shafts L L are rocked the mechanism next described one impression-cylinder will berraised as the other is lowered.

Upon the shaft B I is a cam B, having'two segmental surfaces and acting between the rolls 21 22 upon the reciprocating bar A, so as to move and hold such bar first in one direction and then in the other. This bar Ais preferably slotted, so that a box' around the shaft B will be within such slot and thebar A will, be partially supported thereby, and there are also stationary guide-boxes 24 25 upon the base of the main frames of the machine for the ends of this reciprocating bar A. Upon this reciprocating bar-A are pins 31,

projecting at opposite sides, and there are latch-bars O and D, notched to drop over these pins. The latch-bar C is pivoted toa crank 0' upon the cross-shaft L, and the latchbar D is pivoted to a crank D upon the crossshaft L, and it will now be-ap'parent that when the parts are in operation the cam B gives motion to the reciprocating bar A and latch-bars C D, first in one direction and then in the other direction, and rock and cross shafts L L, and through the segmental arms and toggles raise and lower the impressioncylinders a a alternately and apply the necessary force to give the impressions when the cylinders are lowered; but it often becomes necessary to throw off the impressions, and sometimes this has to be done with great promptness by the attendant; but it would often be detrimental to stop the press or to throw off the impression, except at the end of the movement of the reciprocating bed in one direction or the other. To accomplish this object I provide the means next described,

that are brought into action at the proper moment for raising the latch-bars O and D and throwing oif the impression at either end of the movement of the reciprocating bed.

Upon the shaft B is a crank-arm P, having through it a sliding crank-pin 36, with two collars 37 and 38 upon it, and a spring 39, and there is a slide-collar P around the shaft 13', and having an 'eye at the end of an arm that proj ects from the slide-collar, and through this eye the crank-pin 36 passes, and there is a shifting-pin 40 in the peripheral groove of the slide-collar through a box upon the bed-frame, and to this slider Q a link 41. is pivoted and connects the slider to the bent lever Q, upon the opposite end of which is a treadle R in a position convenient for the attendant to place his foot upon the same whenever the impression is to be thrown cit, and the spring 43 restores the parts to their normal position when the foot is removed from-the treadle, and there is upon the lever 0 double inclined cam-ribs 45, and there is a lever G, with similar cams 50, immediately below the lever C and cams 45, and from the end of this lever G a link 49 extends up to the crank-arm F upon the a lever-arm E, with a pin at its end passing in between the two ribs on the latch-barD. It

is .now to be understood that the crank-pin 36 when projected comes into contact with either, the cam on the latch-bar O and lifts the same, so as to raise the latch-bar above its pin 30, and thereby stop the movement of the latch-bar C and the crank C and crossshaft L, or else this crank-pin 36 comes into contact with the cam '50 on the lever G," and by the link 49, arm 1 and lever-arm E lifts the latch-bar D from its pin 31,- and thereby stops the movement of such latch-bar D and crank D, and rock-shaft L, and parts connected therewith to throw oif the impression from the cylinder a; but when the treadle and crank-pin 36 are in their normal position such crank-pin is drawn into the crank P, as seen in Figs. 2 and 3, and hence it does not come I as soon as the said crank-pin clears either the cam 45 or 50, to which it may be adjacent, and if the foot remains on the treadle first onelatch-bar. will be raised and throw off the impression:from one cylinder and then the other latcli bar will be raised and throw off the impression from the other cylinder, and the impression-cylinders will remain in an elevated position until the foot is wi hdrawn from the treadle and the parts return automatically to their normal position. I

I provide levers 80 and 81 with rollers 83 84 resting upon the respective latch-bars O and D, and springs to press such rollers upon the latch-bars, and there are notches or inclines upon the upper surfaces of the latchbars at the places where the rollers rest when the impression-cylinders are raised. Hence there is no risk of thelatch-bars being moved endwise accidentally while such latch-bars are raised to throw off theimpressions, and the rollers pressing against the inclines tend to force the respective crankarms or rack-arms against stops, one of which is shown at 94.

In presses of this description where there are two impression cylinders difliculty is sometimes experienced in vproperly placing the racks upon the impression-cylinders so as to gear into the rack upon the bed, because the rack upon the bed separates from the teeth on the cylinder when going in one direction and does not come into contact with such gear until the return movement of the bed takes place, and in consequence of the .racks upon the impression-cylinders proj ecting slightly, so that the pitch-line of" the rack corresponds with the surface of the cylinder, the rack on one cylinder might come in contact with the rack upon the other cylinder if such racks were applied in the ordinary manner. To obviate these difiicultiesI'make use of a rack projecting from the surface of the bed and adjustable segmental racks upon the respective cylinders, the segmental rack upon one cylinder being in a different plane from p the segmental rack upon the other cylinder,

in order that the two racks may pass each other freely, and the straight rack upon the g reciprocating bed is wide enough for its teeth to engage with both of the segmental racks upon the impression-cylinders. Upon the typebed b the rack projects, and it is bolted firmly to the edge of. such type-bed b,'an(l it is adjacent to the. contiguous-ends of the two forms lying upon such bed b, and near the longitudinal side bar 61, upon which the end portion of the impression-cylindersbear that the object of the segmental racks 62 63"is the same as in presses of this general character-namely, toinsure accuracy in the 7 relative positions of the type-bed b and the impression-cylinders a a at'the commencement of each impression, .so that the sheet held by the gripper-fingers upon the impressioncyliuder maybe brought properly to register with the end of the type-form, and the surface of the impression-cylinder will be moving in harmony with the type at the commencement of the impression, and after the rack-teeth separate the end of the impression-cylinder traveling upon the bearer 61 insures uniformity in the impression as the parts are moved together.

The segmental racks (l2 and G3 are slotted and attached by bolts to the respective impression-cylinders, and there are end adj usting-screws 64 for holding'the racks firmly in the position to which they may be moved, and the respective racks are adjusted with reference to the ends of the forms lying upon the bed I) in order that each impression may be made with a proper register. If the segmental racks 62 and 63 were in the same plane, the teeth of these racks might'come in contact one with the other in passing each other at the place where the cylinders a a are the nearest together, and the teeth of such segmental racks thereby be blocked or injured. To avoid this difliculty the teeth upon these'segmental racks 62 63 are only half the length of the teeth upon the rack 60, and the teeth upon the rack 62 are close up to the end of the impression-cylinder a, and the teeth upon the rack 63 are sufficiently distant from the end of the impression-cylindcr a to be in a different plane from the teeth upon the rack 62. I'Ience these tc eth pass clear of each other under all circumstances, but they are efficient in bringing the respective parts to a perfect register in commencing the respective impressions and avoiding any looseness or blurring action of the sheet against the end portions of the form. In cases where the racks 62 and 63 are bolted firmly to the respective cylinders the rack 60 may be in two .as they revolve, and it is tobe borne in mind parts separated longitudinally on the line 80 and provided with slots, so that they maybe separately adjusted lengthwise of the bed.

In presses of this character the type-bed isreciprocatcd by an endless rack mot-ion. In my patent, No. 321,539, granted July 7, 1885,. a driving-wheel. and rack and the movements of the respective parts are set forth. At each end of the rack there is a roller 68, that passes into a notch upon the flange of the drivingpinion 74, and this driving-pinion describes ra half-circle in turning each end of the rack,

and at this time there is a pausein the move- I ment ofthe reciprocating bed,t he same stopping gradually and the'n starting again in the opposite. direction. These features are well known; but I have discovereda diiiiculty,because when the notch in the flange of the rackflange against the roller 68 not only tends to wear both of the parts, but it also applies a considerable strain upon the rack and upon the bed, tending to throw thesame out of position laterally. I avoid this difficulty by making the arbor of the roller 68 sufliciently long for a space to exist between the back end of the roll and the portion of the rack 69 to which thearbor of the roller is affixed, and I apply a helical spring 70 and a pin in a hole with the end against the roller68 to give end motion to such roll and force the same outwardly and away from the base 7 of the rack. Hence as the parts move in the manner before described and the roller 68 is received into the notch in the flange of the pinion the roll 68 is moved bodily and end'wise upon its-axis or gudgeon, compressing the spring 70 as the parts pass around the end of the rack, and this spring and pin throw the roller 68 back into its normal position and the pinions pass above or below the rack andcolnmence to give end motion to the same.

It is preferable to have the gear-wheel 86 on the shaft of the-impression-cylinder a nearer to the flfli'llBOf the machine than the gear-wheel 87 on the shaft of the impressioncylindera, in order that the teeth of these two. wheels may not touch each other, and the gear-wheel 88 is of double width, so as to I gear-with the intermediate 89 and with the wheel 87. These gears ."are represented -by dotted linesin Fig; 1 and in plan-view, Fig. 9.

' These gears 86 and 87 are of the same pitchline as the impression-cylinders, so that the parts will receive a motion corresponding to that of the bed. By arranging the gears in this manner the impression-cylinder a receives its movements from the gear 88 acting on the gear S7, and the cylinder a from the gear 89 acting on the gear 86, and the gears 86 and 87 do not touch, but they lap past each other suiliciently for the impression-cylinders to be contiguous to each other, and either cylinder can be lifted bodily to throw of! the impression without being partially rotated by the gear'teeth in the act of being raised or lowered, whereas in presses of this kind wherein the teeth oi! the gears 86 87 interlock, or one cylinder is driven by the other, the elevation or depression of one cylinder in its relation to the other cylinder is liable to turn one cylinder on its axis and throw itout o! register, or prevent the teeth of the segments 62 or 63 properly engaging with the rack upon the bed, especially when both impression-cylinders are raised to throw elf the impressions. The pinion 175 on the outer end of the shaft 174 gears into the wheel 89, as in my aforesaid patent, No. 321,539.

I claim as my invention 1. The combination, with the impressioncylinder in a printing-press andthe journah boxes and tie-rods, of the slides at the lower ends of such tie-rods, the journals 10, resting upon the slides and secured thereto by straps,

the toggle-blocks K and K, the pivot-plates vening between the slides 5 and the frame of the press, the arms 12, extending downwardly and terminating as segmental racks, the cross rock-shaft having at its ends segmental racks gearing into the teeth at the ends of the arms, and the latch-bar and crank for giving motion to the cross-shaft, and the reciprocating bar A and cam B, substantially as set forth.

upon by the crank-pin to raise the latch-bar,

substantially as set forth.

4. The combination, with two impressioncylinders and the me'chanisln for raising and lowering the same, of the two cross-shafts L L', their cranks, and the two latch-bars C D,

connected with such cranks, the reciprocating bar A, theshaft B, and camB for giving motion to such reciprocating bar A, the pins upon the reciprocating bar, with which the latch-bars connect, the crank-arm P, movable crank-pin 36, cams 45 and 50, lever G, link 49, arms E and F, and the connection to the latch-bar D, whereby one" crank-pin is made to throw off the impression of either cylinder or both. in succession and at the proper time, substantially as set forth; v

5. The combination, with the impression.- cylluder, its journal-boxes, and vertical tierods, of the slides connecting the lower ends of the-tie-rods, the springs below such slides,

and adjusting-screws to regulate the power cylinder in a printing-press, and the journalv;

boxes and tie-rods, of the slides 5 at the lower ends of such tie-rods, toggle-blocks K and K, having journals upon the slides and frame, respectively, the washers 17 having annular ribs passing into smaller grooves in themov-' ing ends of the toggle-blocks,substantiallyv as specified.

7. The combinatiomwiththe impression cylinder, journal-boxes, and vertical tie-rods, ofthe slides 5, the toggle-blocks K K, inter-- vening between the slides andthe frame of the press, the arms 12, extending downwardly and terminating as segmental racks, the cross rock-shaft having at its ends racks gearing into teeth at the ends of the arms, and mechanism for rocking the cross-shaft, substantially as set forth.

8. The combination, with the impression- I cylinder, journal-boxes, and vertical tie-rods,

of the slides 5, the toggle-blocks K K, intervening between the slides 5and the frame of the press, the arms 12,-connected with -the journals of the toggle-blocks, the latch-bar and the reciprocating bar A-and cam B, the

rock-shaft L, and'connections from the latch bar to the rock-shaft and from the rock-shaft to the arms 12, substantially as set forth.

9. The combination, with the impressioneylinders a a and the reciprocating typebed I), of the rack 60, attaehedto the type-bed, and the segmental racks'62 and 63, attached to the impression-cylinders a a, respectively, the teeth of the rack on one cylinder being in a different plane from the teeth upon the rack of the other cylinder andthe rack upon the type-bed being adapted to receive the teeth of both the segmental racks, substan-.

tially as setforth.

10. The combination of the type-bed, the rack upon the same, and the pinion for-reciprocating such rack, the rollers 68 at the ends 7 of the racks having an end mo'vementupon their pivots or gudgeons, and a spring and pin for giving motion to eachrollerendwise 4 of its axis, substantially as setforth'."

11. The combination, with the impressioncyliuder and latch-bar and the intervening connecting mechanism, of a lever and spring, and a roller on the lever acting against an incline upon the latch-bar when the impression is thrown off, for the purposes set forth.

12. The combination, with the impressioncylinders and the reciprocating bed, of the gearf wheels 86 and 87 of the same pitch-line as the impression-cylinders and upon the respective shafts thereof and set at "'liferent distances from the frame of the machine, so

that the teeth do not engage each other, and the gear-wheels for driving such gears 86 and 87, and means for raising and lowering'the impression cylinders, substantially as set fort-hr 1 3. The combination, with the impressioncylinders andthe reciprocating bed, of the gear-wheels '86 and 87 upon the shafts of such impression-cylinders, set at different distances from the frame of themachine, so that the teeth do not engage each other, and the gear-wheels for driving such gears 86 and 87, and means for raising and lowering the impression-cylinders, racks upon the respective impression-cylinders and upon the reciprocating bed, substantially asset forth.

14. The eombination,wi th the reciprocating pinion 74 for driving the same, in eombination with the two impression-cylinders, separate gears of the same pitch-line as the impression-cylinders and upon the shafts thereof and in different planes, so as not to touch each other, intermediate gears 88 and 89 for driving the gears upon the impression-cylinder-shafts, and a gear upon the shaft of the pinion 74, gearing into the intermediate 89, substantially as set forth. 7 i 1 16. .The combination, in a perfecting-press, with a type-bed, and two contiguous impression-cylinders, and means for raising and lowering the same, of gearing for driving the bed, and a separate train of gearing from the driving-shaft to each impression-cylinder, the

touching each other, whereby the bed and cylinders are moved in unison and the im- I pressioncylinders can be raised or lowered without being turned thereby on their axes, I

substantially as set forth. 7 Signed by me this 19th day of November,

' WALTER SCOTT. Witnesses:

GEO. '1. PINCKNEY, WILLIAM G. Mom. I

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