US629087A - Stop-motion for printing-presses. - Google Patents

Description

Patented July l8, I899. T. M. NORTH.

STIJP MUTION FOR PRINTING PRESSES.

(Application filed Jan. 5, 1897.)

5 Shets-Sheet I.

{No Model.

rm: "cams PEYERS w. Pncnoumq. WASHINGTON. n c,

No. 629,997.; Patented July I8, 1999-. I T. N. NORTH. v

STOP MOTION FOR PRINTING PBESSES.

{Application filed Jam. 5, 1897.) (In Nodal.) 5 sneet9sh99t v2.

ml: xoflms 9mm ca. PHOTO-LUNG wnsumu-rm. D. c.

N0; 629,087. Patented July l8, I899.

' T-. N. NORTH.

STOP MOTION FOR PRINTING PHESSES.

(Application filed Ian. 6, 1897.1

5 Sheets--Sheet 3.

nflow.)

No. 629,087. Patented Iuly 18, I899. T. I. NORTH. STOP MOTION FOR PRINTING PRESSES.

(Application' filed J nn. 5. 1897.!

5 Sheets-Sheet 4.

(No udder.)

Tn: nouns rrruu pajmm WINGYON. m c.

N0. 629,087. Patanted July I3, I899.

T. M. HURT. STOP MOTION FOR PRINTING PBESSES,

(Application filed. Jun. 5, 1897.)

JZZUGTLZZU tions. for Printing-Presses, fully described ably, moves at a constant speed. The inven-' the sheet-receiving cylinder is coupled does improved devices by which a movable mem- 1 barren STATES:

PATENT other.

THOMAS M. NORTH, on NEW YORK, N. Y., Assienon T0 ROBERT HOE, THEO- DoEE n. MEAD, ND CHARLES w. CARPENTER, or sAME PLACE.

S-i'OP -MOTYON FOR. PRlN T lNG-PRESSES,

SPECIFICATION formingpart of Letters Batent No. 629,087, dated 'd'uly 18, 1899.

' 7 Application and January 5, i397.

To (tZZ whom it may concern.-

Be it known that I, THOMAS M. NORTH, a subject of the Queen of Great Britain, resid-' ingat New York, Brooklyn,) county of Kings, and State of New York, have invented certain new and useful Improvements in. Stop-Moand represented in the following specification and the accompanying drawings, forming a' part of the same.

This invention relates generally to printing-machines employing'a sheet-receiving cylinder which is stopped in order that the sheet may be fed thereto,-and after the sheet has been fed is started and carries the sheet onward in order that it may be subjected to the-printing" operations.

The invention is more particularly concerned with that class of printing-machines in which the receiving-cylinder is coupledto and uncoupled from a memberwhich, prefer tion might, however, be used in'machines other than printing-machines and in printing-machines wherein the member to which not move at a constant speed.

The invention has for its object to provide her, such as the sheet-receivin g cylinder, may be coupled to and uncoupled from a moving' n1embersuch, for instance, as a constantlyrotating platecarrying cylinder-the engagement being effected in such a manner as to gradually start the sheet-receiving cylinder and to cause it to move with a constantlyaccelerat-ing speed'until its surface movement becomes uniform with the member to which it is connected,to maintainthis uniform movement during a desired period of time, and then to gradually retard the movement of the movable member, at the same time uncoupling it from its cooperating moving member until it is brought to a full stop, at which time in case the movable member is a sheetreceiving cylinder the'sheet may be fed' thereto. I

The machine which has been selected to illustrate the invention is a printing-machine of the rotary stop-cylinder type, and the sheetreceiving cylinder acts also as the imwith this invention.

Serial No. 618,024. (No model.)

pression member of a printing-couple, the

cylinder to which itis coupled and from which it is uncoupled acting also as the printing or plate-carrying member of the couple. As be-' 5 5 fore indicated, however, it is to be understood that the invention is not to be limited in its use to the particularkind of printing-machine described in the following specification and illustrated in the accompanying drawings, nor is its use to be restricted to printing machinery, as it is useful not only in other styles of printing-machines, but also in many other relations.

The invention consists in certain constructions, parts, improvements, and combinations, as will be hereinafter fully described in the following specification and pointed out .in the claims hereunto appended.

In the accompanying drawings, which constitute a part of this specification, and in which like characters of reference indicate the same parts, Figure 1 is a side elevation of a rotary stop-cylinder printing-press equipped Fig. 2 is a plan view of 7 5 the same. Figs. 3 to 8, inclusive, are dia grammatic end elevations of the impression and form cylinders, showing their parts in various relations during the performance of said operations; and Fig. 9 is a diagrammatic 8o superimposition of the two coupling-levers.

In order to readily understand this i'nven-,-

' tion, the printing-press illustrated as embodying it will first be generally explained. It consists of a form, plate, or type cylinder A and a sheet-receiving or impression cylinder B, which cylinders are so mounted in the side frames as to suitably revolve and coact in producing the impression. In this instance the form, plate,-or type cylinder A is twice the diameter of the impression-cylinder B; but this may vary, asis well understood.

.The' cylinder A is provided at oneend with a gear 12, which meshes with a gear 11, mountedupon a cam-shaft 3-, and which lat- 5 ter gear 11 meshes with a pinion ,10 on the driving-shaft 2,-.and which shaft is provided with driving-pulleys'48 and 49, as is usual,

motion thus beingjimparted from the drivingshaftthrongh pinion 10 and gears 11 12 to too the form or plate cylinder A.

The cylinder B is provided at one end with a segment 30, and the form or plate cylinder A is provided at the same end with a segment 31, which segments 30 and 31 are caused at proper times to intermesh, and thus enable the cylinder A to drive cylinder B and the two to move concertedly during a portion of a rotation of the latter, or while the printing operation is effected. Atits opposite end the cylinder B may, if desired, and as is shown, be provided with a similar segment 32,which will in like manner coact with the gear 12 on cylinder A.

The shaft of the impression-cylinder B is provided with a gear 40, fast upon it, which meshes with and drives a gear 41, fast on the shaft of the delivery-cylinder O, by which the latter moves concertedly with the impressioncylinder for the delivery of the sheets, and these sheets are in the instance shown delivered to tapes 42, whereby they are carried over fly-fingers 43, by which they are laid upon a piling-table in the ordinary way.

The impression-cylinder B is provided with sheet-grippers 33, that are operated to receive the sheet fed to them from the table 50 and to carry the same around with said cylinder and into contact with the form, plate, or type on the cylinder A and to release the printed sheet to the delivery-cylinder C, as is common, the latter of course having receivinggrippers, or to equivalent transferring device or a guiding device for accomplishing the smooth and effective passage of the sheets from the cylinder 13 to the final-delivery device.

The plate or form cylinder A in the machine which has been selected to illustrate the invention is double the size of the impression-cylinder B and is provided with a plate or form carrying portion equal in circumferential extent to that of the impressionsurface of the cylinder B. It also has an inkdistributing surface I, is equipped with suitable ink-supplying devices K, and may have associated with it plate-dampin g appliances in case the machine is designed to print from planographicsurfaces. These dampingappliances are or maybe of any suitable construction, and it is not'deemed necessary to show them. The machine is further provided with form-rollers L, which are supplied with ink from the distributing-surface I and which act to ink the form in the usual manner.

In order that the im pression-cylin der B may be brought into and remain in a state of rest, at which time a sheet is fed to it, and then be started in its revolution and have its movement accelerated to that of the form or plate cylinder A, have its segment 30 moved into gear with the segment 31 of the said cylinder A, so as to be driven thereby at uniform surface speed therewith, and after having thus been rotated during the making of the impression have its movement gradually slowed down when the segment 31 runs out of gear with the segment 30 and then brought to a state of rest in its normal position for the reception of another sheet and be uncoupled from said cylinder A without diminishing the normal movement of the latter cylinder, the cylinder A is provided with two coupling-levers 20 21, which levers are respectively pivoted to the head of cylinder A at its nongear end by means of projecting studs 4 5, suitably secured thereto. The inner 0r actuating arm of each of these levers 2O 21 is provided with an antifriction-roll, as 6 7, which runs in the path-cam 60, which is bolted to the side frame in a stationary position and suitably curved to produce the requisite movements of said levers. The forward ends of these levers 2O 21 are slotted, so as to properly enter over, engage, and withdraw from studs or rolls 8 9, that are carried by and project beyond one end of the impression-cylinder B at suitable distances apart between the ends of the segment 30.

The function of the lever 20 is to engage with the roll 8 to start the impression-cylinder B from its state of restand move it to such an extent that its segment 30 shall be in position to gear with the segment 31, its corresponding segment 32, if that be used, being simultaneously brought into position to mesh with the gear 12. The function of the lever 21 is to engage the roll 9 as the segment 30 is running out of gear with the segment 31 while both cylinders are moving at the same speed and cause the impression-cylinder B to complete its necessary rotary movement, but at a diminishing speed, and leave it in its proper position of rest for the reception of the sheet vto be printed. The exact operation of these mechanisms will be more fullyhereinafter described; but, first, since it is desirable,though not essential, that the stopping of the rotation of the cylinder 13 shall be aided by a mechanism for overcoming its momentum and with a locking device when the cylinder is to be stopped the means for accomplishing these objects andadopted herein will first be explained.

The shaft of the impression-cylinder B is provided, outside of the framework, with a brake-wheel (31, around which a friction-band 62 is stretched, said band having its ends attached at different points to the outermost arm of a bell-crank 63, that is pivoted at (if to the side frame, said bell-crank having its inner arm pivoted to a rod 65, that is guided over the camshaft 3 and has a roll that is pressed upon by the cam 66 on the cam-shaft 3, which cam is so shaped as to tighten and loosen the friction-band 62 at suitable intervals.

In order that the cylinder 13 may be locked in a position of rest suitable to hold its sheetreceiving grippers 33 into position to receive the sheet andits roll 8 in position to be engaged by the lever 20, said brake-wheel 61 is provided with a stud 1, projecting from its inner face, with which codperates a stop-lever '70, that is pivoted to the side frame at 71,

lIO

and has its upper end forked to engage with said stud'l, and its :lower arm 72 is provided with a stud that runs in the groove of a cam '73, fast on the cam-shaft 3.

If the brake mechanism and the stop-lever 70, either or both, are used, it will be understood that when the cylinder Bis to be started into rotation the brake mechanism will be released and the stop-lever will be. disconnected from said cylinder, so that it may be set into rotation by the action of the lever 20,

carried by the continuously-moving cylinder A, be geared thereto, and after making nearly arevolution be slowly retarded and broughtto a state of rest by the lever 21, the slowing- -down operation being aided by the brake mechanism and the stopping action being renderedpositive bysaid stop-lever 70. It will be understood that'when the brake mechanism-and stop-lever 70are present they are thrown out of action slightly before or simultaneously with the commencement of theop- I eration of rotating the cylinder B, the per- 3 to 8, inclusive.

the same.

formance of'which operation will be understood by the following description thereof, taken in connection with the diagrams Figs.

In Fig. 3 the parts are shown in the positions which they have when the constantlyrotating cylinder A is bringing its couplinglever20 into engagement with the roll 8, carried by the sheet-receiving cylinder 13, to start ously in the direction ofits arrow and the cam 60 is properly shaped therefor, said cam will cause the lever 20, pivoted to the cylinder A, to so move onwardlyandoutwardly that its outer bifurcated or slotted end will pass over the roll 8," and thus securely couple the two cylinders together, so that they'will The outer end i of this coupling-lever ZOfirst meets the roll- '8, as is shown in full lines in Fig. 3, when thereafter revolve in unison.

the cylinder 13 is stationary,aud in moving from this positionwith the cylinder Athe distance shown by the dotted lines in said figure this lever is not only passed over that roller, but has in so doing started the cylinder B with anaccelerating motion by the engagement of the rear or driving face of its slotted end with theroll 6. 3 In moving with said cylinder A to the extent shown'by fulllines in Fig. 4 the lever 201'emains fully coupled with the-r0118. It thus smoothly engages the roll 8, and thus not only starts the impression-cylinder B intorotation from its stateof rest, but moves it with a gradually-increasingspeed untilits movement is uniform in speed with that of the cyliuderA, at which'time the segment 30 of cylinder B will be engaged with the segment 31 of the cylinder A,-\vhi'ch latter thereupon drives the cylinder B,at which'time the coupling-lever 20 will have been so moved inwardly by the as seen in full lines, Fig. 4, thus admitting of shape of the cam 60 asto withdraw said coupling-lever'from engagementwith the r0118,

As thecylinder A moves continueeaosv v a.

cylinder B being wholly driven by the gearing. When this gearing of the two segments is efiected and constitutesthe means for rotating cyiinder B from cylinder A, the lever 20 has by the shape of the cam 60 been so far withdrawn from its engagement with the roll 8 as to enable the two to pass out of engag ment during the continued rotation of the cylinders. Lever 20 thereafter takes the position shown in Fig. 6, ready to repeat its 'operation just described. The cylinder B then makes themajor part of its rotation,

v driven by the segments, to perform the'print-.

ing operation, as is seen in Fig. 5', and when during this rotation the segments are about to run out of gear, as is seen in Fig. 6, the

'cou pling-lever 21 is brought into engagement with the roll 9 in like manner as was lever 20 in connection ,with roll 8, thus causing'the cylinder B when it ceases to be driven by the segments to'be farther moved from its posithe cylinder B is locked in its normal or sheetreceiving position, the arresting of said-cylinder having been aided, if desired, by the brake mechanism. The lever 21 is thereafter by the further rotation of thecylinderAwithdrawn from the roll 9, as isseen in Fig. 7, full lines, in like manner as was the. lever 20. The cylinder B is thus stopped in its normal or sheet-receiving position, as in Fig. 8, while thecylinder'A, continuously rotating, completes its rotation, the lever 2l-is withdrawn to its inward position, as in Fig. 4, and the mechanisms are again brought into positio to repeat the operations described. The relative shapes of the cam 60, lever 20,

and. the slot in its end are such that while the slotted end of the lever 20 is just approaching and meets the stud 8 the iine of motion of its slotted end is parallel with the sides or bearing-surfaces of its slot; but as the'canislot GOacting upon the stud 6 of this lever rocks the same it causes the slottedend'of said lever to constantly deviate angularly from this parallelism, which angular movement, in conjunction with its forward movement, constantly imparts increasing'speed to the roller 8 and through it to the cylinder B until it leaves the roller 8, when the. angle at movements of the lever will impart a uniform surface speed to cylinder 13 with cylinder A,

at which time the segments 30 and Slwill be engaged to drive't'his cylinder B, whereupon said leverwill have ceased its driving action.

The segments 30 31 then drive'the cylinder A 1' through nearly one rotation and bring the le- I25 which it is then related to the roller 8 is such v that the resultant of the. outward and forward ver 21 into position to couple with roll 9 to enable the cylinder B to be brought gradually to a state of rest. This lever 21 operates in a manner the opposite to that of lever 20- that is, engages the roll 9 of cylinder B at its high or normal speed and constantly diminishes the same until said cylinder is arrested.- The operation will be best understood from Fig. 9, where the levers 20 and 21 are illusa and leave it at its greatest operating-angle,

Fig. 4, which is when both cylinders are moving at the same speed. But under the same operating conditions-that is, when the stud 7 of lever 21 is in the same position on the cam as the stud 6 of lever 20 was (compare Figs. 3 and 6 or see Fig. 9)-it will be perceived that the lever 21 will engage the stud 9 while said lever 21 is at its greatest operating-angle, in which it will impart a motion equal to the surface speed of the cylinders, and by comparing Figs. 4 and 7 it will be apparent that this lever 21 will leave said roll 9 when this lever is at its least operating-angle, Fig. 7, or when the parallel bearing sides or actuating-surfaces of this lever are parallel with its movement. It will be noticed that the operating-surfaces of the lever 20 and the lever 21 are inclinedto the path of movement of the cylinder B, by which they are carried.

The difference between the dotted and full lines of the coupling-levers in Figs. 3 and 4 and 6 and 7 shows how the same angular distance of their travel imparts dilferent motions to their respective studs, which are indicated in dotted and full lines.

There might be provided two cams at opposite ends of the cylinder A, one operating the lever 20 and the other operating the lever 21; but it is desirable and preferable that only one cam be employed, and also that this cam shall be a stationary one, as is' herein shown. It is possible to so shape a single cam thatit may move and properly actuate the levers 20 21.

While in the arrangement shown the cylinder B is shown and described as performing the function of an impression-cylinder, it is obvious that it may solely act as a feedingcylinder, to which sheets may be fed While it is stationary, and thus insure perfect register and then operate to carry the sheet inward and transfer it to the cylinder A, and that the latter may receive and carry onward said sheet and act as an impression-cylinder and impress said sheet upon a form carried by a coactiug cylinder, or it may be in connec tion with a reciprocating bed coactin g with the cylinder A.

It is obvious that in some structures embodying this invention the cylinder B may perform the function only of a transfer-cylinder, thus carrying the sheet to another mechanism or mechanisms which are to operate upon it.

What is claimed is-- 1. The combination with a sheet-receiving cylinder and two studs or rolls carried thereby, of a larger cylinder provided with two pivoted coupling-levers adapted respectively to engage said studs or rolls, a cam acting to vibrate said levers, and means for continuously rotating said larger cylinder, whereby said sheet-receivin g cylinderis engaged,while stationary, by the larger cylinder, caused thereby to rotate, is disconnected therefrom and again left stationary, substantially as described.

2. The combination with a sheet-receiving cylinder provided with a segment and two studs or rolls between the terminals of said segment, of a larger cylinder provided with a driving-segment, two pivoted coupling-levers adapted respectively to engage said studs or rolls, a cam acting to vibrate'said levers and means for constantly rotating said larger cyl-' pivoted coupling-levers adapted respectively to engage said studs or rolls, a cam acting to vibrate said levers, means for continuously rotating said larger cylinder, whereby said sheet-receivin g cylinder is engaged,while stationary, by the larger cylinder, caused thereby to rotate, is disconnected therefrom, and a stop-lever whereby said receiving-cylinder is locked stationary, substantially as described.

4. The combination with a sheet-receiving cylinder and two studs or rolls carried thereby, of a larger cylinder provided with two pivoted coupling-levers adapted respectively to engage said studs or rolls, a cam acting to vibrate said levers, means for continuously rotating said larger cylinder, whereby said sheet-receiving cylinder is engaged,while stationary, by the larger cylinder, caused thereby to rotate, is disconnected therefrom, retarded and again left stationary, and a brake mechanism whereby the stopping of said receiving-cylinder is aided, substantially as described.

5. The combination with a sheet-receiving cylinder provided with a segment and two studs or rolls between the terminals of said segment, of a larger cylinder provided with a driving-segment, two pivoted coupling-levers adapted respectively to engage said studs or rolls, a cam acting to vibrate said levers, means for constantly rotating said larger cylsegment, of a larger cylinder provided with a inder, and a stop-lever for locking the receiving-cylinder stationary, substantially as de-v scribed. I

6. The combination with a sheet-receiving cylinder provided with a segment and two studs or rolls between the terminals of said adapted respectively to engage said studs or rolls, a cam acting to 'vibrate said levers,

means for constantly rotating said larger cylinder, a brake mechanism aiding in arresting said receiving-cylinder, and, a stop-lever for locking the same described. I v

8. The combination with a sheet-receiving cylinder provided with a segment on each end stationary, substantially as p and two studs or rolls between the terminals of one segment, of a larger cylinder provided with a driving-segment on one end and a wheel on the other, two pivoted coupling-levers adapted respectively to engage said studs or rolls, a cam acting to vibrate said levers, and means for constantly rotating said larger cylinder, substantially as described.

9. The combination with a sheet-receiving cylinder and two studs or rolls carried, thereby, of a larger cylinder provided with two pivoted cam-operated coupling-levers adapted to successively coact with said studs or rolls, and means for -continuously rotating said larger cylinder, whereby the sheet-receiving cylinder is .engaged while stationary and started into rotation, and is engaged while running at speed and has its rotation suspended to bring it to a state of rest, substantially as described.

10. The combination with a sheet-receiving cylinder having a segment and two studs or rolls carried thereby, of a larger cylinder provided with a driving-segment and two pivotedcam-operating coupling-levers adapted to successively engage said studs or rolls, and means for continuously rotating said larger cylinder whereby the sheet receiving cylinder is engaged while stationaryand started into rotation whichis continued as the segments intermesh, and said rotation is suspended as the segments run out of mesh, to bring the receiving-cylinder to a state of rest, substantially as described. I

11. The combination of two members, means for intermittently driving the members in unison and means forvarying the speed of one of the members with relation to the other,

said means consisting of engaging surfaces having paths of. movement corresponding to those of the members and one of said surfaces being inclined to its path of movement, and means for giving one of the surfaces a movement independent of its driven movement, substantially as described.

- 1:2. The combination with two members,

means for intermittently driving the members in unisommeans for varying the speed of one member with relation to the other, said means consisting of engaging surfaces having paths of. movementcorresponding to those of the members, one of the surfaces being inclined to its path of movement, and means for varying the inclination of said surface, substantially as described,

18, The combination with two rotating members, of a pair of rotating engaging devices intermediate the two members, the engaging snrface of one of the devices of the pair being inclined to its path of movement,

and means forgiving one of the surfaces a movement independent of its rotating movement, substantially as described.

14. The combination with a pair of rotating members, of two pairs of rotating engaging devices,intermediate the two members, the engaging-surface of one of thedevi'ces of each pair being inclined to its path of movement and means for varying the inclination of said surfaces, substantially as described.

15. The combination with a pair of rotating members, of two pairs of rotating engaging devices intermediate the two members,the engaging surface of one of the devices of each a pair being inclined to its path of movement,

and means for giving one device of each pair a movement independent of its rotating movement, substantially as described.

. 16. The combination with a pair of rotating members, of engaging devices having a path of movement corresponding to that of the members and intermittently operating to al ternately gradually increase and gradually reduce the speed of one member with respect to the speed of the other member, and means for giving one of said-devices a movement independent of its rotating movement,substantially as described.

17. The combination with a pair of rotating members, of two pairs of rotating devices intermediate the me mbers, means for giving one of the devices of each of. the pairs a movement independent of its rotating movement by which it is caused to be engaged with and disengaged from its cooperating device, one pair of said devices operating to alternately gradually increase and the other pair to gradually reduce the speedof one member with respectto thespeed of the other member, substantially as descri bed.

18. In a printing-press the combination with a sheet-receiving cylinder, of a cylinder cooperating therewith, means for intermittently driving the cylinders in unison and means forvarying the speed ot' the sheet-receiving cylinder with relation to the other cylinder, said means consisting of engaging surfaces'carried by the two cylinders, one of said surfaces being inclined to its path of movement, substantially as described.

19. In a printing-press, the combination with a sheet-receiving cylinder, of a cylinder cooperating therewith, means for intermittently driving the cylinders in unison, means forvarying the speed of the sheet-receiving cylinder with relation to the other cylinder, said means consisting of engaging surfaces having a movement corresponding to that of the cylinders, andone of said surfaces being inclined to its path of movement, and means for giving one of said surfaces a movement independent of its rotating movement Whereby it is carried into and out of engagement with its cooperating surface, substantially as described.

20. In a printing-press, the combination with a sheet-receiving cylinder, of a cylinder cooperating therewith, means for intermittently driving the cylinders in unison, means for varying the speed of the sheet-receiving cylinder with relation to the other cylinder, said means consisting of engaging surfaces having a movement corresponding to that of the cylinders, and one of said surfaces being inclined to its path of movement, and means for giving said inclined surface a movement independent of its rotating movement whereby it is carried into and out of engagement with is cooperating surface, substantially as described.

21. In a printing-press the combination with a sheet-receiving cylinder, of a cylinder cooperating therewith, means for intermittently driving the cylinders in unison, means for varying the speed of the sheet-receiving cylinder with relation to the other cylinder, said means consisting of engaging surfaces having a movement corresponding to that of the cylinders, one of said surfaces being inclined to its path of movement, and means for varying the inclination of said surface, substantially as described.

22. The combination with a sheet-receiving cylinder, of a second cylinder cooperating therewith, rotating engaging devices intermediate the two cylinders, the engaging surface of one of the devices being inclined to its path of movement, and means for varying the inclination of-said surface, substantially as described.

23. The combination with a sheet-receiving cylinder, of a cylinder cooperating therewith, a pair of rotating engaging devices intermediate the two cylinders, the engaging surface of one member of the pair being inclined to its path of movement, and means for giving one of the members a movement independent of its rotating movement, substantially as described.

24. The combination with a sheet-receivin g cylinder, of a cylinder cooperating therewith, two pairs of rotating engaging surfaces intermediate the two members, the engaging surface of one member of each pair being inclined to its path of movement, and means for giving one member of each pair a movement independent of its rotating movement, substantially as described.

25. In a printing-press, the combination ing-couple, said cylinder having sheet-receiving means, of a printing member cooperating therewith, means for .varying the movement of the impression-cylinder with relation to the plate-carrying means, said means consisting of engaging surfaces moving with the members of the printing-couple, one of said surfaces being inclined to its path of movement, and means for varying the inclination of said member, substantially as described.

27. In a printing-press, the combination with the impression-cylinder of the printing- .couple, said cylinder having sheet-receiving means, of a printing member cooperating therewith, means for varying the movement of the impression-cylinder with relation to the printing member, said means consisting of engaging surfaces moving with the members of the printing-couple and one of said surfaces being inclined to its path of movement, and means for giving one of the surfaces a movement which is independent of the printing movement of the couple, substantially as described.

28. In a printing'press, the combination with a rotating printing or form cylinder, of an impression -cylinder, means for driving the two cylinders in unison during a part of their rotation, means rotating with the cylinders for varying the rotation of the impression-cylinder with relation to the form-cylinder, and means for giving said last-named means a movement independent of its rotating movement, substantially as described.

29. In a printing-press,the combination of a continuously-rotating plate or form cylinder, an impressioncylinder, means for rotating the impression-cylinder intermittently so that it shall step during each revolution of the form-cylinder, and mechanism mounted upon and rotating with the plate cylinder and engaging with the impression-eylinder for giving the impression-cylinder a graduated rotatory motion from its positionof rest to even motion with the form-cylinder,and again from even motion with the form-cylinder to a position of rest, substantially as described.

30. In a printing-press,the combination of a continuously-rotating plate or form cylinder,

e29,os7I- 7 an impression-.cy' linder, means for rotating the impression-cylinder intermitten tly so that it shall stop during each revolution of the form-cylinder, segmental gearing for connect-- ing the two cylinders while the printing operation isin progress, and'mechanism mounted upon androtating with the plate-cylinderand fengaging with the impressiomcylinderv for communicatinga graduated rotatory motion to the impression-cylinder between its position of rest and its position when geared to the form-cylinder, substantially as'described.

31. In a printingspress,the,combination of a continuously-rotatingplate or formcylinder,

an impression-cylinder, means. for rotating the impression {cylinder in termittent'ly so that I it shall stop during each revolution of the form-cylinder, segmental gearing for connect ing the two cylinders while the priutin g opera 1 tion is in progress, and mecha'nismmonnted upon and-rotatin g with the plate-cylinder and engaging with the impression-cylinder for communicating a graduated rotatory motion to the impression-cylinder between. its position'of rest audits position when geared to V the form-cylinder, and again between itslat-L ter position and its position of tially as described.

rest, substan- 32. In a printing-press, the combination of" an impression-cylinder, a plate or form cylin der, means for connecting the two cylinders,

so that the former cylinder shall receive motion from the latter during a portion only of each revolution of the plate-cylinder, and

mechanism mounted upon and rotating with the plate-cylinder and engaging with the impression-cylinder for graduating the motion transmitted to the impression-cylinder so that the same shall gradually increase from a position of rest to equality with the form-cylin der and shall gradually decrease from such equality to aposition of rest, substantially as described. 1

33. The combination of an impression-cylinder, provided with a segmental gear, two

. studs or rolls, a larger-cylinder provided with a driving-gear, and two pivoted cam-actuated cou lin -levers whereb a raduated motion b b is transmitted from the'larger cylinder to the impression-cylinder onstarting the same and bringing it to rest, substantially as described.

34. The combination of an impression-cyl-.

inder provided with afsegmental gear, two studs or rolls, a form-cylinder of larger diameter than the impression-cylinder provided with a driving-gear for engaging with said segmental gear, and two pivotedcam-actuated' coupling-levers adapted respectively to engage with said studs or rolls whereby a graduated motionis transmitted from the form-cylinder to the impression-cylinder on.

starting the same and bringing it to rest, substantially as described.

35. The combination of an impression-cylinder, two studs or rolls carried thereby, a

form-cylinder of larger diameter than the impression-cylinder provided with two pivoted cam-actuated coupling-levers adapted respectively to engage said studs or rolls, and means forcontinuouslyrotating said form cylinder,

substantially as described. I

36. The combi'nationof an impression-cylformecylinder of larger diameter than the impression-cylinder provided with two pivoted cam-actuated coupling-levers adapted to successively coact with said studs or rolls,.and mcans for continuously rotatingsaidform inder, two studsor rolls carried thereby, a g

cylinder whereby the impression-cylinder is engaged while stationary and sftarted into rotation-and isengaged while running at speed and has its rotation retarded to brin git to rest,

substantially as described.

37. IThe combin ation with two cylinders, the'fi'rst of which is driven, astud'or roll carried'by the second cylinder, mechanism mounted upon the first cylinder provided with a driving-face for engaging with the. stud or rolland thereby giving motion to thesecond cylinder, and means for changing the inclination of the driving-face with reference to the stud or roll. whereby a graduated motion is transmitted from the first cylinder to the.

second cylinder, substantially as described. 38. The combination with two cylinders, the first of which is driven, a stud or roll carried by the second cylinder, a coupling-lever pivoted upon the first'cylinder provided with a driving-face forengaging with the stud or roll and thereby giving motion to the second oted to the form-cylinder and each provided with a driving-surface adapted to engage with one of the studs or rolls and means for mov ing the coupling-levers on their pivots to change the inclination of the driving-faces with reference to their respective studs or rolls whereby graduated motion is transmitted from the form-cylinder to the impressioncylinder on starting and stopping the impression-cylinder, substantially as described.

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

, rnoMAs M. NORTH.

Witnesses: i

F. W. H. CRANE, v LoUIs RoEHM,

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