US629911A - Printing-press. - Google Patents

Description

no. 629,9". Patented Aug. l, 1899.

. T. M. NORTH.

PRINTING PRESS.

(Application filed HGV. 22, 1897.)

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PRINTING PRESS.

{Appnm'n med Nov. 22, 1897.)

5 Sheets-Sheet 2.

(No Model.)

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No. 629,9II. Patented Aug. I, I899. T. M; NGR'I'H.

PRINTING PRESS.

(Application led Nov. 22, 1897.)

5 Sheets-Sheet 3.

(No Model.)

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No. 629,9H. Patented Aug. l, |899.

T. M. Nonni. PRNTING PRESS.

(Application med Nov. 22, 1397,) i No Model.)

5 Sheets-Sheet 4.

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Patented Mg.y l, |899.

T. M. unam. PRHITING PRESS. (Application med Nov. 22, 18971.)

5 Sheets- Sheet 5.

{No Model.)

' UNiTED STATES? THOMAS M. Nostri-L 'ONEW YORK, n.

Y., Assiettes rro ,ROBERT HOE, THEO-r DORE I-I. MEAD, AND CHARLES W. CARPENTER, OF SAMEPLACF.;

PRINTING-Pases.

sPEcIFIcA'rri forming part 'ofLttners Patent No. 629,911, este@ August 1, 189e. Application iiled November 22; 1897. Serial NO- 659,507. (No model.)

To @ZZ whom/ it may concern:

Be it known that I, THOMAS M. NORTH, a subject of the Queen of Great Britain, residing at New York, (Brooklym) county of Kin gs,and

State of New York, have invented certain new and useful Improvements in Printing-Presses, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

While the present invention is applicable to various constructions of printing-presses, it is shown herein as applied to that form of rotary-cylinder pressin which the impressioncylinder is of less diameter than the platecylinder and makes but one revolution and also comes to a stop during each revolution of the plate-cylinder.

The invention includes mechanism fortripventing the attempted operation of the tripping mechanism while the im pression-cylinder is in motion.

The invention consists in certain part-s,

improvements, and combinations, as will-be hereinafter described, and fully pointed ont in the claims hereunto appended. y

. In the drawings hereto annexed and forming a part of this specification, Figure l is a side elevation of a press embodying my invention. Fig. 2 is a plan4 view of the same, showing the impression-cylinder partly in section. Fig. Bis a View, on an enlarged scale, of one end of the impression and plate cylinders. Fig. Li is a view, on the same scale, of the other end of the impression-cylinderand a part of the plate-cylinder. Fig. 5 is aplan y view, on the same scale, of the parts shown in 5o Fig. 4, the line of sight being in the direction ofv the arrow of Fig. 4. Fig. G is a view, on

.y the saaie of Fig. 1, of the end of the plate-@yt inder,illustrating the operation of the devices for controlling the position of the inking-rollers, a group of inking-rollers being shown as raised above the surface of the plates on the cylinder and a group of rollers being shown as in contact with the same. Fig. is also a view, on the same scale, ofthe end of the platecylinder and shows the press in astate of rest, 6o

in which both groups of inking-rollers are lifted above the surface of the cylinder-plates. Fig. 8 is an end view of, the press shown in Fig.Y 7,' the line of sight being that indicated bythe arrow in Fig. 7. 65

Referring to the drawings, A is the frame of a press embodying my invention, B a plate or form cylinder, and C an `impression-cylinder. The cylinders are provided with the segmental gears D E and the cou pling-levers 7o F F for transmitting intermittent and gradcated mption from the cylinder B to the cylin der C and causing the latter cylinder to come to a stop during each revolution of the former cylinder, this mechanism being the same and operating in the same manner as described in my application, Serial No. 618,024, tiled January 5, 1897. The cam-actuated brake Gr and stop H for arresting the motion of the impression-cylinder andlocking it in a posi- 8o tion of rest are also provided, as described in said application. It should, however, be understood that I may employ other means than that above described for rotating the impression-cylinder. I do not limit myself to the rotation of the impression-cylinder through connections with the plate-cylinder.

In order that the rot-ation of the impressioncylinder may be tripped when desired, the segment E is formed on a wheel or short cylgo inder I, detached from the cylinder G and rotating freely on the cylinder-shaft J. The wheel I has a flange 7l projecting within the cylinder and provided with a notch i. A shaft K is journaled in the two ends of the cylinder and carries keyed upon it an arm 7c, provided with a lng k", adapted to lit the notch t". At the other .end of the shaft K and beyond the end of the cylinder'is abellcrank lever Il, on one arm of which is al stud roo l and to the other arm of which is connected a spring Z', which exerts a pressure upon the shaft K to force the lug 7o" into the notch fi". Projecting from the end of the cylinder is another stud Z. Keyed upon the short shaft M, journaled in the frame, is the hand (or foot) tripping-lever m. The shaft M is in line with the shaft K when the cylinder is stationary and carries on its end inside the frame a three-armed lever N. One arm n of this lever carries two lugs which are adapted to engage with the stud Z", as shown in Fig. 4. The second arm n carries two lugs adapted to engage with the stud Z, as shown in the same figure. The third arm n" has pivoted thereto a link O, the other end of which is slotted and rides over a pin o, projecting inward from the press-f rame opposite the platecylinder. This link carries a lozenge-shaped stop o', which is adapted to engage with a segmental rib o, projecting from the end of the plate-cylinder. The operation of this mechanism is as follows: In normal operation the impression-cylinder is locked to the wheel I by the lug Zt entering the notch t, and the tWo move together in all respects as though a solid cylinder. When it is desired to trip the cylinder, the lever m is elevated, whereupon the lug 7c" is withdrawn from the notch i, the shaft K being rocked by the engagement of the lugs on arm n/ withv the stud Z. At the same time the lugs on arm n engage with stud Z", and the cylinder is thereby held fast in the position it then occupies. The wheel I novi7 revolves alone in connection with the plate-cylinder, leaving the impressioncylinder at rest. When it is desired to prevent the revolution of the cylinder for some time, a pin may be inserted under the tripping-lever, as shown in Fig. 4. Where the cylinder is merely tripped because of the failure to feed a sheet and it is desired to lose but one revolution, the tripping-lever is released at once after `being thrown, as described, and the spring Z forces ,the lug Zr,

into the notch t" when this notch next comes opposite the lug, thereby again locking the cylinder to the wheel I.

It is necessary to prevent attempting to trip when the impression-cylinder is in motion, as by so doing the mechanism would be subjected to probable injury, and to this end the safety device, consisting of the link O and connected parts, is provided. The segmental rib o" is of such length and position as to lie in front of the lozenge o' when the impressioncylinder is in motion and prevent movement of the tripping-lever, as shown in Fig. 3. When the impression-cylinder has come to rest, the rib o is out of the way and the link O is free to move to the position shown in Fig. 4.

It Will be observed that the wheel I, owing to the extension P, on which are placed the studs or rollers p p', with which the couplinglevers engage, may not have sufficient weight to of itself accurately preserve its position when disconnected from the impression-cylinder, its brake and stop, and from the platecylinder. To cause it to hold its position when disconnected, the outer surface of the extension P is made concave in about the curvature of the plate-cylinder, and the latter is provided with a segmental abutment P,whicli is of such a length and so placed as to be op'- posite to and in contact with the extension P during that part of the revolution of the plate-cylinder during which the cylinder is disconnected from the wheel I. The curvature of this abutment is the same as that of the extension P, and it prevents displacement of the Wheel I during this time.

The mechanism for manipulating the inkrollers will next be described. W'hen the ink is first put in the fountain, it is necessary to make several revolutions of the press in order to get sufficient ink on the ink plate and rollers, and during this time the rollers must not come in contact with the forms. To provide for this necessity, the ink-rollers are mounted upon brackets R R', sliding in the frame of the press, and each provided with a stud r. On each end of the cylinder-shaft is mounted a cam S, having a raised portion. On each end of the shaft, between the cam S and the end of the cylinder, is pivoted a lever s, which carries pivoted levers S" s", having rollers which run upon the cams S. In the position of levers s shown in Fig. 6 these levers s' s" are in radial line with. the studs o", and when their rollers ride on the raised portion of cams S they push the inkroller brackets outward, so that the plate may pass under them Without contact. The raised portions of cams S correspond in length, of course, with the portion of the circumference of the cylinder occupied by the forms.

Vhen the press is to be used for printing, the levers's are carried to the position shown in Fig. l, the studs r being in that position out of the range of movement of levers s s.

`When the press is stopped, it is desirable to lift the ink-rollers clear of the plates, and to do this the levers S are provided with raised IOO IIO

inclines s'", which make contact with studs r when the levers s move to the position shown in Fig. Zand push up the bracketsRR. The levers s may be operated by two segments, one on either side of the machine, connected by a shaft, as shown.

My invention includes an improvement relating to the ink rollers, as follows: The ductor-roll Y oscillates between the fountainroll U and the distributing-cylinder Vin the usual manner, it being journaled in arms fixed to the rock-shaft u. From the cylinder V roller V conduct-s the ink to a group of inkrolls on the side next to the impression-cylinder, and roller V conducts the ipk to a group on the opposite side. Now it is plain that if the roller V runs constantly in contact with cylinder V and its group of form-rollers the larger part of the ink will be carried by roller V' to the group of ink-rollers nearest the impression -cy1inder. This is detrimental to good printing, since the ink does not have sufficient distribution. the larger part of the ink could be sent to the other group of ink-rollers, when it would be better distributed before printing. To accomplish this, I mount the roller V ou brackets swinging on the shaft of distributing-cylinder V. On each bracket is formed a toothed segment which gears withsegments placed on each end of the shaft u. Therefore when the shaft u rocks to throw the roller U into contact with cylinder V it lifts roller V out of contact with its group of ink-rollers. The irst and larger part of the ink thus passes onto the roller V and the other group of inkrollers and is more thoroughly distributed before reaching the plates than it otherwise would be. At the same time the roller Vl is kept in contact with cylinder V and its full distributing-powerpreserved. Ofcourse any other suitable form of mechanism may be used for causing the vibration of roller V without departing from my invention.

'When the machine is used to print from planographic surfaces, a suitable damping mechanism will of course be employed. Such a damping mechanism is indicated at W in Fig. 1.

What I claim is-` l. In a printingmachine, the combination with a printing-couple, of amember intermittentlyr rotated in unison with one member of the couple, connections between said member and the other member of the couple, and means for interrupting said connections at will, substantially as described.

2. In a printingmachine, the combination with a rotating printing-couple, of a member intermittently rotated in unison with one member of the couple, connections between said member and the other member of the couple, and means for interrupting said connections at will, substantially as described.

3. In a printing-machine, the combination.

with a rotating form-carrying cylinder, of a rotating impression-cylinder, a memberintermittently rotating in unison with the `formcylinder, connections between said member and the impression cylinder, and means whereby said connections maybe interrupted at will, substantially as described.

4. In a printing-machine, the combination with a printing-couple, of a member, means intermediatethe said member and one member of the couple, whereby a variable rotating movement is imparted to said member,

connections between said member and the other member of the couple, and means for interrupting said connections at will, substantially as described.

5. The combination with a pair of rotating members, of two pairs of engaging devices intermediate the members, one of the engaging surfaces of each pair being inclined toits path of movement, a third member, connections between it and one of the other members, and means interrupting said connections at will, substantially as described.

It would be better'if of a gear, means whereby said gear has a variable movementimparted to it by one of the members of the couple, connections between said gear and the other mem ber of the couple, y

and means for interrupting said connections at will, substantially as described.

' S. The combination with a printing-couple, of a gear, means whereby the gear has its movement gradually increased until it runs in unison with one member of the couple and then gradually decreased until it is brought to a stop, connections between said gear and the other member of the couple, and means wherebyY said connections may be interrupted at will, substantially as described. l y v. y

9. The combination with a rotating printing-couple, of a gear, means whereby the ge'ar has its movement gradually increased until it runs in unison with one member of the couple and then gradually decreased until it is brought to a stop, connections between said gear and the other member ot' the couple, andV means whereby said connections may be in- I terrupted at will, substantially as described. lO. The combination with a constantly-ro-A tat-ing form-carrying cylinder,0f a gear, means intermediate the form-cylinder and the gear whereby the gearhas its movement constantly increased from a position of rest until itrnns in unison with the-form-cylinder and then gradually decreased until it is brought to a stop, an impression-cylinder, connections be- 'tween the impression-cylinder and the gear, and means whereby said connections may be interrupted at will,substan tially as described.

ll. The combinationwith a rotating member, of a second rotating member, means for connecting and disconnecting the two members, means for maintaining the second member in a position of rest when it is disconnected from the first member, a third member, connections between it and the second member,and means for interrupting said connections at will, substantially as described.

12. In a prin ting-machine, the combination with a form-carrying cylinder, of a 'member intermittently rotated from the form-carrying cylinder and when not so rotated is at rest, means for maintaining the member in a position of rest, an impression-cylinder, connections between said member and the impressionu-cylindeigand means forinterrupting said connections at will, substantially as described.

13. In a printingmachine, the combination with a constantly-rotating form-cylinder, of

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'I brought to a position of rest once during each revolution, a trip mechanism for interrupting the driving connection between the two cylinders, and means connected to one of the cylinders for locking the trip mechanism against operation except when the impression-cylinder is in a position of rest, substantially as described.

15. In a printing-machine, the combination with a constantly-rotating form-cylinder, of an impression-cylinder, a gear, means intermediate the gear and the form-cylinder whereby said cylinder imparts a variable movement to the gear, connections between the gear and the impression-cylinder, a trip for interrupting said connections, and means for preventing the operation of the trip except at specified times, substantially as described.

16. In a printing-machine, the combination with a constantly-rotating form-cylinder, of an impression-cylinder, a Vmember intermediatev the two cylinders, devices whereby the member is intermittently rotated by the impression-cylinder and when not so rotated `is at rest, means for locking the member in its position of rest, connections intermediate the member and the impression-cylinder, a trip mechanism forinterrupting said connections, means for preventing the operation of the trip mechanism except at specified times, and means for locking the impression-cylinder when the trip mechanism has disconnected it from the member, substantially as described.

17. In aprinting-machine, the combination with a constantly-rotatin g form-carrying cylinder, of an impression-cylinder, means for giving a rotary motion to the impression-cylinder and for bringing it to a stop once during each revolution of the form-cylinder, a trip mechanism for interrupting the driving connections of the impression-cylinder, means for preventing the operation of the trip mechanism except at speciiied times, a locking device for locking the impression-cylinderin its position of rest, and means for simultaneously operatin g the trip mechanism and the locking device, substantially as described.

18. In a printing-machine, the combination with a constantly-rotating .form-cylinder, of an impression-cylinder, means whereby the impression-cylinder is driven from the formcylinder and brought to a posi-tion of rest once during each revolution, a trip mechanism for interrupting the driving connections between the form and impression cylinders, means for preventing the operation of the trip mechanism except at specified times, a locking mechanism for holding the impression-cylinder in a position of rest when tripped, and means for simultaneously operating the trip and the locking mechanisms, substantially as described.

19. The combination of a plate or form cylinder, an impression-cylinder, a wheel mounted on the shaft of theimpression-cylinder but separate therefrom, means for connecting the plate-cylinder with the wheel to give rotary motion thereto during a portion of each revolution of the plate-cylinder, and means for connecting and disconnecting at will the impression-cylinder to and from said wheel, substantially as described.

20. The combination of a plate or form cylinder, an impression-cylinder, means for connecting the two cylinders during a portion of the revolution of the plate-cylinder, means for interrupting the driving connections between the two cylinders at the will of the operator, and a safety device for preventing attempted disconnection when the impressioncylinder is in motion, substantially as described.

21. The combination of a plate or form cylinder, an im pression-cylinden'a wheel mounted on the shaft of the impression-cylinder but' separate therefrom, means for connecting the plate-cylinder with the wheel to give rotary motion .thereto during a portion of each revolution of the plate-cylinder, means for connecting and disconnecting at will the impression-cylinder to and from said wheel, and a safety devicev for preventing attempted disconnection when the impression-cylinder is in motion, substantially as described.

22. The combination of a plate or form cylinder, an impression cylinder, segmental gearing, coupling-levers carried on one of the cylinders, said gearing and coupling-levers operating to connect the two cylinders during a portion of the revolution of the platecylinder, and means for interrupting the driving connection between the two cylinders at the will of the operator, substantially as described. i f

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

THOMAS M. NORTH.

Witnesses:

F. W. H. CRANE, E. L. SPEIR.

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