US833276A - Trip-motion for printing-machines. - Google Patents

Description

PATENTED OCT. 16, 1906.

J. WHITE. TRIP MOTION FOR PRINTING MACHINES.

APPLICATION FILED 0016,1905

2 SHEETS-SHEET 1.

PATENTED OCT. 16, 1906.

I J. WHITE. v

TRIP MOTION FOR PRINTING MACHINES.

APPLICATION FILED 0016,1905.

2 SHEETS-SHEET 2.

I INVENTOI? UNITED sTATEs PATENT OFFICE? JOSEPH WHITE, OF BOUNDBROOK, NEW JERSEY, ASSIGNOR TO THE ALUMINUM PRESS, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented Oct. 16, 1906.

a licant filed October 6,1905. Serial No. 231,702.

To all whom it may concern: Be it known that I, JOSEPH nrrE, acitizen of the United States, residing .atBoundbrook, county of Somerset, State of New Jersey, have invented certain new and useful Improvements Relating to a Trip-Motion for Printing-Machines, fully described and .rep-f fwith the printing-surfaces, said cylindergears being attached to the shafts of their reresented in the following specificationfand accompan i 1 The machine illustrated, which theimprovements embodying this invention are incorporated, is a rotary multicolor 'litho graphic machine, and while the principles of r the invention are more particularlyadapted. to this type they are not limited to the same and apply'as well to a singleecolorrotarv or in some of its features to a machine in which the form is attached to a' reciprocating bed and coacts with an impression-cylinder.

Referring to the drawings, Fi ure 1 is'an elevation of a two-color rotary ithographic printingmachine, the front frame and cylinders being removed to moreclearly show the mechanism situated between the printingcylinders and the rear frame as the mechanism between the cylinders and the frame embody this invention. Fig. 2 is an enlarged view of "one of the trip-levers. other view of the same, taken in the direction of the arrow 3 of Fig. 2. U

Referring to Fig. 1, 1 is a partly-diagrammaticsll representation of the impress1on-cylinder of the machine, said impression-cylim der mking one ,reyolution vto each sheet printed, said sheets being fed fromthe feedboard and being takenby the grippers. 6, which are actuated by any usual gripper mechanism.

2 and 3 represent the form-cylindersof thismachine, which are one-half'the diameter of the impression cylinder, therefore makes two revolutions to eachone of the impression-cylinder. These have the planographic forms of suitable material, (usually aluminium or zinc,) which in normal printing relation applytheir ink designs to the sheets of paper fed between the impression-cylinder and thedesi n-cylinder, the inkbeing supplied to the orms by the set of rollers 5 5, diagrammaticallyshown above the form-cylinders.

In normal printing operation the form cvlw inders areplaced in printing relation with the impression-cylinders, and at the/proper time Fig.v 3 is anwhen the impression-surface comes in contact with the form-surface the sheet is printspective cylinders in the usual'manner, and

diagrammatically.)

The'impression-cylind'er'l and the platetherefore not illustrated, the source of driving being obtained from the pinion 10. (Shown,

During the normal printing operation the i printing-cylinders remain in fixed diametral relation to each other, and the sheet being fed ,to the impression-cylinders receives the design from the plate-cylinder 2 and then on its forward movement receives the "design from the plate-cylinder 3 and is delivered by" any form of delivery mechanism. (Not shown.)

For various reasonsas, for instance, when a sheet is missed by the feeder or on starting up the machine when it is desirous to first ink up the forms before the printing operation beginsit is necessary toseparate the cylinders, thereby placing them out of printing relation with each other. This maybe accomplished by mounting. either the impression member or the form members in movable bearin s; but in the construction shown preferab y. the plate-cylinders are moved, although (by a modification of the same mechanism embodied in this invention) it could be arranged to move the impressioncylinder instead; but, as shown, the impres .sion-cylinder 1 is mounted in a fixed bearing formedb the side frame .8 and side frame cap 9, an the plate-cylinders are mounted in eccentric bearings 10 and 11, which when rocked cause the plate-cylinders to change their diametral re ation to the impressiony r, m g them to and from the imp'ressioncylinder.

These eccentric-bearin s receive theirmotion through the agency (in.

a manner to be described) of pivoted ,mem-

bers which are engaged at one end by a ro- Ioo engaged on one side of the pivotto move the 1 cylinder in onedirection and on the other side of. its pivot to move the cyllnder 1n the other direction, and while the medium of bringing these opposite ends into engage;

ment with (in this case) the rotating cam is a.. sliding stud the principle is not necessarily limited to the mechanism shown, as it can be readily seen that various methods widely diiiering from this for the purpose of bringmg either end of the pivoted member into engagement with the rotating part could readily be devised by a skilled designer ac uainted with the principle.

ivotally mounted inside ofeach of the front and rear frames 8 and adjacent to the imression-cylinder 1 are two pairs of tripevers 12 and 13, (one pair for each platecylinder,) which levers are connected to the eccentric=boxes throu h the following means:

Each lever has forme on it a forked arm 14,

- and 21, upon which are the antifiiotionrollers 22 and These bolts are so governed that at the proper time the proper ones are placed in the path of the tnp-cams 24, which are bolted to the impression-cylinder :ends and rotate with it.

It can be seen by referring to Fig. 1 that the cam 24 in revolving has just come adjacent to one of the rollers 23 of'trip-lever 13 and will in its forward movement press said roller toward the impression-cylindershaft and in doing so will rock lever 13, thereby moving connection 17 and rocking the-eccentrio-boxes '11 in the direction of the arrow and in doing) so the eccentric being so arranged will ring the plate cylinder 3 into printing relation with the impression-cylinder 1. The trip-lever 12 has just previously (as can be seen by observing Fig. 1) been subjected to the. movement described, and

the platecylinder 2 is shown in printing relation and the plate-cylinder 3 is wet about to go into rinting relation with t e impression-c lin' er 1, and as long as both platecylin er's remain in printing relation with the impression cylinder the rinting operation is continuous, the three cy inders keeping their relative diametral positions, and at each revolution of the impression-cylinder it takes the sheetfrom the feed-board, brings this sheet into rinti relation with the form on the first p ate-cylinder 2 and then with the form on the second plate-cylinder 3, and then delivers it to the delivery mechanism.

When. it is desirou's-as, for instance, when a sheet is missed-to interrupt this printing action, the roller 22 and the sliding bolt 20,

- which is seated in the hub 19, formed on the trip-lever, are moved into the path of the cam 24 on the impression-cylinder '1, and they are caused to rock in a direction opposite to which they were rocked when the rollers 23 were placed in engagement. This causes the eccentric-boxes 10 and 11 (by means of the connections 16and 17 and eyepieces 27 and 28) to be rocked so as to remove the platecylinders out of printing relation with the impression-cylinder, where they will remain until the sliding bolts in the trip-levers are again actuated. It can be seen that while the rollers 23 when rocked toward the impression-cylinder shaft are still in the same plane laterally with their actuatin cams they have been pushed forward by t e cam over the highest part of the same and are out of the path of its movement in that direction, whereas the other end of the trip-levers have now been rocked toward the periphery of the plate-cylinder adjacent to the. path of the cam; but as the rollers 23 are withdrawn into'theirhubs they are not moved by the cams 24. When it is desirous to again move the plate-cfylinders, these studs are'placed in the path 0 the cam by sliding them in their hubs, so as to cause them to project within the path of the cams. these ;studs are actuated may be varied widely; but this preferably is accomplished by the means illustrated.

The trip- levers 12 and 13 are centered on the hubs 28, upon'which are pivotally mounted at 29 the actuating-levers 30, which er- -form the function of moving the cam-r0 lers and studs into and, out of the path of the cam and at the same time locks the properroller and stud in operative osition in rela tion to the cam in the fol owing manner? One end of this actuatinglever 30 engages a pin 31 in the stud'21 and the opposite end of the pin 32in the stud 20. These pins 31 and 32 are guided in slots 33 and 34, and when the fork formed on the ends of lever 30 eng es the in this pin will be moved outward in t e straight part of the slots formed in the hubs 18 and 19 until it reaches the curved ortion, where it will turn in this curve and a low the face 35 to come under it, as is shown with pin 32, Fig. 3. Now it can be seen that any pres sure exerted on the roller 22 tending to'move it inward will cause the pin 32 to crowd against "the face 35, which will prevent the movement of the stud 20, thus forming an effective look. When the actuating-lever 30 is moved in an opposite direction, the same operation occurs with relation to the stud 21 pnd rollers 23 at the opposite end of the tripever. 37 when the lever is moved, thereby holding it in the position in which it is laced. The manner in which this actuatingever 30 may ,be controlled by the operator may be varied widely; but the preferable form is shown.

When the operator desires to bring the press into printing relation, (assuming it to The manner in which The spring 36 works across its center be in tripped position,) he presses on the treadle 38 and brings the pin39 under the catch 40 and through the medium of the con nection 41, lever 42, shaft 43, (which reaches across the machine and finds its bearing in the front and rear frames.) and connection 44,

' extending upward from the levers 45 on both tere on the studs 49, which are screwed in the center of the'stud 50, upon which the trip-levers are pivoted. In the case of a,

multicolor-machine, as is illustrated, these actuating-plates 46 have ivoted upon them the connections 60, whicli are pivoted at the other end to the'actuating-plat'es 56, thereby causing both sets of actuatmg-plates to operate together to move the sliding studs to produce the effect desired. The studs 23 (as in Fig. 1) having been moved in the path ofthe cams 24- are engaged by the" cams, rocking the studs and lever toward the cylinder-shaft, and as the actuating- plates 46 and 56 have been kept stationary the pins 48 upon the actuating-levers have moved forward in the slots 47. This positionis shown with relation to the first trip-lever 12. The second trip-lever is about to be rocked, as described.

When it is desired to trip thecylinders out of printing. relation with each other, the treadle 38 is kicked, releasing the pin 39 from the latch 40, allowing the spring 52 to cause the actuating-lever and mechanism to move in the opposite direction, throwing the opposite stu s in the path of the cams 24 and looking them there, so that on the next revolution of the impression-cylinder the plate-cylinders will be rocked out of printing relation with the impression-cylinder. I

Although the actuating-plates are shown directlyconnected to the foot-treadle mechanism, a timing mechanism may be interposed between the foot and actuating mechanisms whereby the trip-lever bolts may be automatically actuated upon at a predetermined time in the sequence of the printing, so as to prevent these sliding bolts from being moved at a time that m ay cause dam age as, for instance, when the boltsto be moved outward are'opposite the face of the cam.

It has been found that when under print ing pressure an eccentric-bearing tends to rotate with the cylinder-journal, thus displacing the cylinder, and forthis purpose where an eccentric-box is used it has been customary to provide locking mechanisms more or less complicatedas, for instance, the one shown in the United States application, No. 277,257, applied for by Thomas G. Olaridge and Thomas A. Randall, September 6, 1905; but I have found that by arranging the centers so that when the eccentric- .said cam to Cbearingis rotated to throw the cylinder inlmpression in the same direction as the cylinder rotates it is only necessar to provide a stop to the movement 0 the eccentricbearing. For this pur ose I'have provided pins 53, against which t e arms 14 are moved when the parts are brought-into printing position, and when "the printing pressure is taken by the bearing these arms 14 are crowded against the pins, firmly locking the cylinders in printing position without additional locking mechanism.

When the trip-levers are rocked in the opposite direction away from the levers 53 and the cylinders areplaced out of printin relation, there is no printing pressure. 6onseuently no locking mechanism is required, t efriction of said eccentric-box in its bearing being sufiicient to keep it in place when ressure is on it. ams 24 are bolted in a fixed position to the-impression-cylinde'r ends and are formed, as shown,iwith a double-cam-surface, so that if the trip-lever studs are thrown into the path of the cams these cams will roperly enage the studs whether the cylin er is moved orward or backward, thus avoiding breakage.

- I claim- 1. In a printing-machine, cylinder-moving means having a pivoted lever having two armsnontaining sliding. bolts, a rotating cam, means for movingone. of said boltsv into the path of the cam to rock the lever to place the printing members out of printin relation, and the other of said bolts-into t e path of said cam to place the printin relation.

2. T e combination of an impression-cylinder and a form-cylinder, a cam rotating with one of said cylinders, a pivoted lever having two arms, means for causing the cam to engage'the lever at one arm to rock said lever to place the cylinders into printing relation, and at t-he'other arm to place the cylinders out of printing relation.

3. The combination of an impressioncyl inder and a formecylinder, a cam rotating in a fixed relation with one of said cylinders, a I pivoted lever having two arms containin sliding bolts, means for moving one of em .bolts into the path of the cam, thereby causing said cam to rock said lever to place the printing-cylinders out of printing relation and the other of saidbolts into the path of place the cylinders into printing relation. I

printing members into 4. The combination of an impression-cylinder mounted in fixed bearings and a formcylinder mounted in eccentric-bearings, a cam rotating in fixed relation with the impressioncylinder, apivoted lever mounted on the frame adjacent to the impression-cylinder, connections between the lever and the eccentrio-bearings, means for causing said cam to engage the ivoted lever on one side of its pivot to roe said eccentric-bearing to separate the cylinders, and to engage said pivoted lever on the other side of its pivot to rock the eccentric-bearing to place the cylinders in printing relation.

5. The combination of an impression-cyl mder mounted in fixed bearings and a plurality of form-cylinders mounted in eccentricbearings, a cam rotating in fixed relation with the impression cylinders, pivoted levers mounted on the frame adjacent to the impression-cylinder, connections between the levers and the eccentriebearings of said form-cylin- 7 means having a pivoted member and rotating cam said pivoted member having two eng g bolts, means for moving one of said he ts into the plane of said cam when the other bolt is moved out of the plane of said cam, said cam engaging one bolt to rock said member to place the cylinders in printing relation, and engaging the other bolt to place the cylinders out of printing relation.

7. In a printing-machine, cylinder moving means having a pivoted member and rotating cam; said pivoted member havin two engaging bolts and a lever pivot on said member to move one .bolt into the plane of the said cam when the other bolt is moved by said lever out of the plane of said cam, said cam engaging one bolt to place the cylinders in printing relation and engaging the other bolt --to place the cylinders out of printing relation.

8. In a printing-machine, cylinder-moving means having a pivoted member and rotating cam, said pivoted'member having two engaging bolts, a lever mounted on said pivoted member to move said bolts in o posite directions, said lever locking one o 'the bolts in operative relation with said earn.

9. In a printing-machine, a cam rotating with a printin -cylinder, a pivoted member adjacent to sair l cylinder containing two sliding bolts, a lever mounted on said pivoted member to move the sliding bolts, an actuating part centered on the pivoted member's center engaging the bolt-moving lever to in eccentric-bearing seam move the sliding bolts in opposite directions, said sliding bolts being engaged by the cam to move the pivoted member to separate the printin members.

10. n a printing-machine, a cam rotating with a printing cylinder, a pivoted member adjacent to said cylinder containing two sliding bolts, a lever mounted on said pivoted member to move the sliding bolts, an actuating part centered on the pivoted members" 11. In a printing-machine having a formcylinder and impression-cylinder, one ofsaid cylinders being mounted in eccentric-bearings for the purpose of placing the cylinders into and outof printing relation to eachother a stop for preventing the rotation of the eccentric bearing by the printing pressure; said eccentric-bearing being rotated in the same direction as the cylinder to place the cylinders into printing relation.

3 12. In a printing-machine having a plurality of form-cylinders and an impression-cylinder, said impressionscylinder being mounted in stationary bearin and the form-cylinder Id! the purpose of moving the form-cylinders into and out of printing relation to each other, and stops for preventing the rotation of the eccentric-bearings by the printing pressure.

13. The combination of an impressioncylinder mounted in fixed bearings and a formcylinder mounted in eccentric-bearings, a cam rotating with the impression-cylinder, a-pivoted lever mounted'on the frame adjacent to the impression-cylinder, connections between the lever and eccentric-bearing, a stop for preventing the movement of the parts by the printing pressure, said cam engaging the pivoted lever to rock the eccentric-bearing in the same direction that the plate-cylinder rotates, therebybringing the form-c linder into printing relation with one of the moving parts against the stop.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

- JOSEPH WHITE.

Witnesses:

AUGUSTA Wnrrn, P. W. HALL.

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