US1968166A

US1968166A - Rotary printing press

Info

Publication number: US1968166A
Application number: US648658A
Authority: US
Inventors: Phythian Thomas Ewart; Crabtree Charles Henry
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-07-31
Filing date: 1932-12-23
Publication date: 1934-07-31
Anticipated expiration: 1951-07-31

Description

y 31, 1934- 'r. E. PHYTHIAN ET AL 1,963,165

ROTARY PRINTING PRESS Filed Dec. 23. 1932 s Sheet-Sheet 1 Fig.1. Fig.1?

Inventor: 7. 6. 47!. with Attonuy.

y 31, 1934- T. E. PHYTHIAN -r AL 1,968,166

ROTARY PRINTING PRESS Filed Dec. 23. 1932 [s Sheets-Sheet 2 Attorney.

July 31 1934. 1-. E. PHYTHIAN El AL ROTARY PRINTING PRESS e Sheets-Sheet :5

Filed Dec. 23, 1932 Inven 9m y 1934- T. E. PH YTHIAN ET AL 1,968,166

I ROTARY PRINTING PRESS Filed Dec. 23, 1932 6 Sheets-Sheet 4 Inventors i .3. 44466.46 l Q by l A. G. M:

Attorneyy 31, 4- T. E. PHYTHIAN ET AL ROTARY PRINTING PRESS Filed Dec. 25, 1932 6 Sheets-Sheet 5 Invontqrs y 31, 1934- 'r. E. PHYTHIAN ET AL I 1,968,166

ROTARY PRINTING PRESS Filed Dec. 25, 1952 6 Sheets-Shet e j gmdantqrs a. a. M;

- .dttorney.

' Patented at 31, 11.934

'NHTED STATES.

ROTARY PRINTING PRESS Thomas Ewart Phythian,- Headingley, Leeds, and Charles Henry Crabtree, Leeds, England Application December fi3, 1932, Serial No. 648,658

. In Great Britain'July 31, 1931 Claims.

This invention relates to rotary printing presses, and has among its objects in the first place to avoid the serious consequences that may arise upon the breakage of the web while the press 5 is in operation, and further to prevent or reduce the consequences of a winder to a minimum and to secure the throwing out of operation of the inking mechanism.

It may be observed that a winder is caused by the web breaking at some point after its entry into the press, the loose end instead of continuing on its way to the folders being carried either around the cylinders or the inking rollers of the press. Such an occurrence wastes paper and delays production at a vital period and is liable to result in serious breakage in the machine.

It is well known that there are devices which, when the paper breaks, through electrical or other means, cut off the motive power to the press, but with high-speed machines a considerable number of revolutions of the cylinders are made before the press is at rest, and a quantity of paper may wind round the cylinders to such an extent that it is impossible to move the press without releasing the cylinders from contact by lifting the bearings, or other mechanical work. If the winder does not take place round the cylinders the paper is generally conveyed by means of the inking rollers to the ink drums, or even to the ink fountain. The delay in effecting clearance after these breakages may be of considerable duration.

It is also well known that electrical and mechanical brakes can be applied to high-speed machines, but these are costly to install, take up a considerable amount of space, and impede the free working of the machine, and, as every rotating part cannot be so braked, the effect of a sudden stoppage of the parts which are braked might be injurious to the freely running members. It is obviously better to allow the machine to slow down in a normal manner, and to prevent the winder.

To overcome these disadvantages it has been proposed to provide, in a suitable position or posiis rendered operative by the closure of contact tions, such as before the impression cylinders, in.

serving on breakage of the web, to cause the oper-- between any one of a number of contact devices that are distributed along the path of the web through the press in such manner that, on breakage of the web at any point, one of the contact devices becomes operative to close the circuit of the relay, whereby the closure of one or more electrical control circuits is effected, such control circuits energizing solenoids or magnets by which control of the press elements may be effected.

According to the invention, moreover, closure of one of the contact devices may result in the energising of electro-magnetic devices whereby web gripping jaws are closed upon the web to arrest the passage of the web into the press by tearing it adjacent the impression cylinder or at some other convenient position.

The detector contacts may be provided in various ways. Thus, they may be provided in the form of studs disposed one on each side of the path of the web, one of which studs is movable towards the other and is mounted under the action of a constraining force tending to move it into contact with the other, such movement being prevented under normal conditions by the presence of the web passing between the studs. Again, the contacts may take the form, for example, of a roller over which the web is carried and a runner resting upon the surface of the web in such manner that on breakage of the web the runner is permitted to make contact with the roller. Such runner may be in the form of a rotatable member carried by a supporting arm which may be mounted under the action of a spring serving to apply the runner upon the web with a certain degree of force, or the runner may be provided in the form merely of a spring finger or the like lightly pressing downwardly upon the web.

According to the invention, moreover, in the application of the invention to machines of the 95 kind where the paper rolls are rotated so long as the press continues to operate, there may be provided an additional electro-magnetic device adapted to operate for the purpose of arresting the feed of web from the rolls by applying a brake to the roll spindle or by throwing out of action the means whereby the rolls are rotated.

According to the invention, moreover, the relay controlled by the detector contacts may serve also to effect the control of anelectro-magnetic 105 mechanism provided to control the operation of a clutch serving to bring into action gearing by which mechanism for lifting the inking rollers from the inking drums may be rendered operative. and if desirable the ink fountain and ink fountain roller may be rendered inoperative. Suitable mechanism for this purpose is disclosed in the specification of the application No. 564,863, filed 24th September 1931. Alternatively, detector devices specially provided for the purpose may serve directly to control the circuit of a separate relay or contactor coil which in turn controls the circuit of the electro-magnetic mechanism, independently of the relay controlling the operation of the gripping jaws.

According to the invention, moreover, the clutch controlled by the electro-magnetic device may serve to engage a rotating element of the press with a gear through which rotation is con veyed to an eccentric device for operating the carriers of the inking rollers.

According to the invention, moreover, the said gear may serve to effect the rotation 'of a cam or equivalent device controlling a switch device by which the control circuit may be broken.

The invention further comprises the features that are hereinafter described and claimed.

The invention is illustrated by way of example in the accompanying diagrammatic drawings.

Figures 1 and 1a together represent a lay-out of the clutch mechanism and the electro-magnetic control mechanism, together with an illustration of the disposition of the gripping jaws and detector elements in relation to the path of the web.

Figure 2 is a side elevation of part of a press in which the disposition of the elements shown in Figure 1 may be followed.

Figure 3 is a detail view of the web-gripping jaws and the electro-magnetic device for operating them, represented in Figure 1.

Figure 4 is a side elevation of a modified form of the gripping jaws and operating magnet.

Figure 5 is a corresponding view at right angles to Figure 4.

Figure 6 is a detail elevation to an enlarged scale of a modified form of the detector contacts.

Figure 7 is a view corresponding to Figure 6, taken at right angles.

Figure 8 is a side view of an electro-magnetic device for applying a brake to the roll spindle.

Figure 9 is a view corresponding to Figure 8, taken at right angles.

In carrying the invention into efiect according to the particular arrangement illustrated in Figures 1 to 3 of the accompanying drawings, at a suitable position or positions in the press as, for example, immediately before the impression cylinder in the direction of the path of the web, there is mounted in the frame and adjacent the web a transverse spindle a, which may carry a guide roll for-the web b, upon which spindle are secured arms a carrying a transversely disposed bar a? which upon the face adjacent the web is provided with an inset a of rubber or other resilient substance. Upon the far side of the web in a position opposed to the said bar, there is provided a second bar 0 supported in brackets c in a fixed position from the framework (1 of the machine said bar being provided with a recess to receive the inset a The said spindle a has also fixedly mounted upon it an arm or lev'er a which is under the control of a solenoid or magnet e and which is for the purpose connected to the core e of the solenoid or to the armature of the magnet so that when the solenoid or magnet is energised the spindle a is rotated to throw the bar a provided with the resilient inset a forwardto grip the web against the fixed bare.

Detector devices are fixed along the path of the paper from the point immediately after it has passed the impression cylinder or the gripping device hereinbefore described. Each detector conveniently comprises a fixed stud or contact ,f, disposed upon one side of the path of the web b and conveniently adjustable towards or away from the said path, and a corresponding spring contact I on the other side of the path of the web, which contact is maintained from engagement with the first by the presence of the web. The said detectors are connected in a low voltage controlling circuit represented by the leads f f in which circuit is included a relay or contactor coil g which, when energised, serves to close a circuit from the usual supply mains it through the leads e e e, e to the solenoid or magnet e of the gripping device. The low voltage current may be supplied by a battery or from a transformer or through a resistance connected between the mains and the coil g at h In Figures 4 and 5 a modified construction of gripping mechanism is shown in which the closure of the jaws is effected under spring action and the electro-magnetic device is used merely to eifect the release of a catch normally holding the jaws open. Thus, as in the construction hereinbefore described, there is provided a spindle a upon which are mounted arms a bearing the bar a the spindle a being carried in bearings in the brackets c which support the fixed bar 0. The brackets are also conveniently provided with stops 0 determining the outermost position of the arms a to facilitate the resetting of the device after operation. The bars a and c are provided each with an inset of rubber c c and the bar a is provided with pins which enter corresponding holes in the inset 0 The spindle a is further provided at a suitable position with the arm a extending in line with the arms a and a torsion spring a is disposed around the spindle and anchored at the one end in the bracket 0 and at the other end in the boss of the arm a A similar spring may be provided at the far end of the spindle suitably anchored at the other end in a collar or the like upon the spindle. The outer end of the arm a is provided with an adjustable catch member a for co-operation with a similar catch of the electro-magnet e. The latter is provided with an armature e pivoted at the one end and linked at the other in such manner as to permit its movement in the direction of the axis of the core of the magnet. The

outer or linked end is provided with a catch member e suitably positioned and adapted to engage the catch member a. Such engagement is maintained normally under the action of a spring e anchored to'a pin e mounted in the framing of the press. For the purpose of permitting ready setting of the device the outer end of the spindle a is provided with flattened surfaces or of hexagonal or other shape for the reception of a spanner or the like by which the arms a may be thrown into contact with the stops 0 to permit the engagement of the catch members a and a. On the energization of the magnet e through the operation of the detector contacts, the armature e is attracted and the catch members a and e are disengaged so that the bar a is thrown over for the gripping of the web under the action of the torsion springs a".

In Figures 6 and 7 is illustrated an alternative form of the detector contacts. In. this construction the web is carried over a roller i which, as indicated by the conductor i is connected into the control circuit. Arms 1' are mounted upon the spindle i of the roller 2' and serve to'carry in fixed position a spindle 1' upon which is rotatably mounted an arm 7' serving to bear at the outer end the spindle of a runner 7 adapted to rest upon the roller 1' under the action of a torsion sprLng a coiled about the spindle 7' and anchored at one end to the collar 9'? fixed upon the spindle and at the other end to the boss of the arm; 7' the position of the arm 7' being determined by an adjustable collar 7' The second lead 7" is suitably connected to the spindle 7' which is insulated, for example, by means of a bush 1' and collars 7' from the bearing in the arm 1' Contact'is advantageously made with the runnerv by way of a leaf spring contact arm 7' mounted upon the arm i to ensure effective conduction of the current from theroller i to the spindle 7' without reliance merely upon the contact of the runner 7' with its spindle. In the operation of the device it will be understood that the web being carried around the roller i breaks the contact between the said roller and the runner 7' On breakage of the web contact is made between these parts, and in consequence the circuit is closed for the operation of therelay or contactor col 9.

Means may be provided, such as a hand switch is (Figure 1), for the breaking at will of the control circuit in order to permit the resetting of the web after operation of the device.

It will be understood that the detector devices may be of any number and may be fixed inany part of the press between the printing couple and the folder.

The control circuit may serve by means of the relay or contactor coil g or a similar device provided for the purpose to make or break contact between two terminals 1 to which are connected the leads 1 l of the press button circuits represented by the conductors 1 l which are providedto permit arrest of the rotation of the motor of the press, V

It will be understood that the invention is particularly applicable to presses in which the paper rolls are driven so long as the press continues in operation. In such machines the control circuit may serve to operate another electro-niagnetic device which actuates a brake, for example, a

' brake band applied to the roll spindle As illustrated in Figures 8 and 9, the spindle m for the reel-is provided with abrake drum -n formed in two sections n M, of which the section 1'z cooperates with a brakeband anchored at the one end to an anchor device 0 and at the other end i to a bell crank lever o pivoted at M. Such brake band may be operated, for example, by hand mechanism. The section n cooperates with a brake band which is anchored by means of the anchor device p and at the other end is connected to an adjustable device p which is pivoted upon the armature r of a magnet 1', which armature is itself pivoted at one end and linked at the other so that it may have a movement in the direction of the magnet r.- The magnet r is suitably supported by a bracket r from the frame of the reel stand, and is connected into the circuit controlled by thedetector contacts or into a circuit specially provided for the purpose and controlled by detectors provided for the purpose. Thus, on the breakage of the web and the consequent bringing into action of one or more of the detectors, the circuit through the magnet r is closed so that the armature r is attracted to tighten the brake band about the section 12 of the brake drum n.

For the purpose of automatically throwing out of operation the inking mechanism upon breakage of the web, the inking rollers q are carried in a frame or frames q of known construction adapted for movement to carry the inking rollers into and out of engagement with the inking drum q under the action of a rotatable eccentric q suitably mounted'so that by its rotation it may impart a lateral movement to a spindle g which carries the double-armed member 11 for moving the frame q and which also is provided to. carrya disc cam q and a hand-operating lever q" and a chain wheel q which is geared by a chain q with a chain wheel s loosely mounted upon the shaft s of the inking drum and which is integrally formed or otherwise fitted with a friction clutch element s The shaft of the inking drum has slidably, but non-rotatably, mounted upon it the co-operating member s of'the friction clutch, and such member is mounted under the control of an operating lever t pivoted at one end upon a fixed pivot t and connected at the other end with the core of a solenoid t. The said lever is advantageously mounted under the action of a spring 15 tending to maintain the slidable clutch member s out of engagement.

The solenoid t is supplied with current from the mains h or from anothersuitable source under the control of the relay or contactor coil g.-

It' will thus be understood that on breakage of the web and the closure of the contacts of one of the detectors and of the circuit of the relay or contactor coil g the circuit through the. solenoid t is closed and the lever t is thrown over to engage the clutch. Thus, the eccentric q is rotated through the chain gear and the inking rollers are moved from contact with the inking drum g The same movement of the eccentric may serve in the manner described in the specification of Application No. 564,863 to render the ink fountain u and ink fountain roller u inoperative.

In a position adjacent the cam q before referred to there is provided a lever 12 which may be a bell crank lever,' carrying the contactor or switch element 1: that is included in the circuit of the relay or contactor coil g. The said lever is adapted to engage the cam q through a suitable runner v The cam is so formed that after a pre-determined movement'of the chain wheel q that is associated with it the lever 11 is caused to break the;.control circuit so that the relay or contactor coil breaks the main circuit of the electro-magnetic device and thus the clutch lever t is pulled into the ofi position by the spring t so that the clutch is disengaged and the drive of the eccentric arrested. The breakage of the circuit produced by the lever '0 controlled by the cam continues until such time as the web has been reintroduced into the press and the inking rollers q have been brought into contact with the inking drum, and where necessary the fountain and.

the gripping device. Other means than the pins before referred to may also be provided for engaging the web of paper so that when the jaws open under the spring action upon deenergisation of the electro-magnetic device the paper may be retained for resetting into the press.

It will also be understood that the electro-magnetic mechanism for preventing a winder may be applied in presses which are not fitted with means for throwing out of action the inking fountain and the inking rollers, and similarly that the electro-magnetic control of the latter mechanism may be applied in machines which are not provided with the gripping devices for preventing a "winder. Similar electro-magnetic control mechanism may alsorbe provided for other purposes than that hereinbefore indicated, such as for the purpose of tripping the press on breakage of the web.

We claim:

1. In rotary web-printing presses having a web braking device, a braking device for the web supply roll and a device for interrupting the action of the inking mechanism, control mechanism comprising a plurality of electrical contact devices distributed along the path of the web, the contacts of which devices are maintained apart by the web, a source of current, and an electric relay connected in a circuit which is closed by way I of one of the contact devices, said electric relay comprising a contact closing member responsive to energization of said relay, contacts closed by said contact closing member, a source of current, electro-magnetic control devices in circuit with said contacts and said source of current and elements responsive to said electro-magnetic control devices determining the operation of said web braking, web roll braking and inking mechanism interrupter devices.

2. In rotary web-printing presses, control mechanism comprising a plurality of electrical contact devices distributed along the path of the web, the contacts of which devices are maintained apart by the web, a source of current, and an electric relay connected in a circuit which is closed by any one of the contact devices, said electric relay comprising a contact closing member responsive to energization of said relay, contacts closed by said contact closing member, a source of current, solenoid control devices in circuit with said contacts, a core for each of said solenoid control devices responsive to energization of the said devices, and web gripping jaws disposed respectively on opposite sides of the path of the web and caused to close upon the web by movement of the solenoid cores.

3. In rotary web printing presses having a web braking device, a braking device ror the web supply roll and a device for interrupting the action of the inking mechanism, control mechanism comprising a plurality of electrical contact devices distributed along the path of the web, the contacts of which devices are maintained apart by the web, a source of current, and an electric relay connected in a circuit which is closed by any one of the contact devices, said electric relay comprising a contact closing member responsive to energization of said relay, contacts closed by said contact closing member, a source of current, solenoid control devices in circuit with said contacts, a core for each of said solenoid control devices responsive to energization of the said devices, web gripping jaws disposed respectively on opposite sides of the path of the web and caused to close upon the web by movement of the solenoid cores, other electro-magnetic control devices in circuit with said contacts of said relay, and elements responsive to said electro-magnetic control devices determining the operation of 'said web braking, web roll braking and inking mechanism interrupter devices.

4. In rotary web-printing presses, control mechanism according to claim 2, a spring acting on said web gripping jaws to close them upon the web, the said jaws being maintained open against the action of the spring by the solenoid cores when the solenoids are not energised.

5. In rotary web-printing presses provided with a reel from which the web is supplied to the press, control mechanism comprising a plurality of electrical contact devices distributed along the path of the web, the contacts of which devices are maintained apart by the web, a source of current, and an electric relay connected in a circuit which is closed by any one of the contact devices, said electric relay comprising a contact closing member responsive to energisation of said relay, contacts closed by said contact closing member, a source of current, an electro-magnetic control device in circuit with said-contacts and said source of current, a brake that is operative upon the reel from which the web is supplied, and an element responsive to said electro-magnetic control device to apply said brake to said reel on energisation of said control device.

6. In rotary web-printing presses, control mechanism according to claim 5, wherein said brake comprises a brake drum upon said reel and a brake band embracing said brake drum, and said electro-magnetic control device comprises a magnet and a relatively movable armature, said armature being connected to and controlling the operation of said brake band.

7. In rotary web-printing presses provided with an inking drum and inking rollers that are movable towards and away from said ink drum, control mechanism comprising a plurality of electrical contact devices distributed along the path of the web, the contacts of which devices are maintained apart by the web, a source of current, and an electric relay connected in a circuit which is closed by any one of the contact devices, said electric relay comprising a contact closing member responsive to energization of said relay, contacts closed by said contact closing member, a source of current, an electro-magnetic control device in circuit with said contacts and said source of current, and an element movable in response to said electro-magnetic control device, said element imparting movement to said inking rollers to carry them out of engagement with said inking drum.

8. In rotary web-printing presses comprising an inking drum, a frame adapted for movement relatively to said inking drum, inking rollers carried by said frame and moved into and out of engagement with the inking drum upon movement of the frame, control mechanism comprising a control spindle, eccentrics in fixed relation to said control spindle and serving on rotation of said spindle to impart movement to said frame, a rotatable driving spindle, a clutch element axially movable but rotatable with said driving spindle, a clutch element loosely mounted upon said driving spindle and geared to said control spindle, a plurality of electrical contact devices distributed along the path of the web, the contacts of which devices are maintained apartby the web, a source of current, and an electric relay connected in a circuit which is closed by any one of the contact devices, said electric relay comprising a contact closing member responsive to energisation of said relay, contacts closed by said contact closing member, a source of current, an electro-magnetic control device in circuit with said contacts and said source .01 current, and an element movable in response to energisation of said electro-magnetic control device and imparting its movement to the axially movable clutch member of the driving spindle.

9. In rotary web-printing presses provided with an inking drum, inking rollers movable comprising a contact closing member responsive to energization of said relay, contacts closed by said contact closing member, a source of current in electro-magnetic control device in circuit with said contacts and said source of current, and an element movable in response to said electro-magnetic control device, which element controls the movement of the ink fountain roller.

10. In rotary web-printing presses provided with control mechanism according to claim 8, a cam upon said control spindle, a co-operating element operated by said cam, and a switch included in the circuit of said electric relay, which switch is operated by said element to break the relay circuit when the movement of the inking rollers is completed.

THOMAS EWART PHYTHIAN. CHARLES HENRY CRABTREE.