US2264521A - Means for and method of timing spray operations for preventing smutting in printing presses - Google Patents

Description

Dec. 2, 1941.

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v G. GREEN 2,264,521

I SHUTTIHG IN PRINTING' PRESSES Filed Aug. 9, 1939 h `2 sneetsqsneet 1 Mmmm' "inns mlmllmlllm; HA

INVENTOR- 75 776mb, .i @mi m v. G. GREEN 2,264,521 MEANS FOR AND METHOD 0F TIMING SPRAY OPERATIONS FOR PREVENTING Dec. 2, .1941'.

-SMUTTING IN PRINTING PRESSES Filed Aug.

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Patented Dec. 2, i

MEANS Fon AND METHOD or 'ruime srmrr OPERATIONS ron raavnN'rrNG SMUTTING m rnm'rma PRESSES l Virgil Green, Chicago; nl.; assignor to Binks Manufacturing Company, Chicago, mi., a corporation o! Delawarev application August' o, i939, Serial No. 289,234

(ci. i- 422) s claims. The present invention relates to meansfor and methodl of timing spray operations for preventing smutting in printing presses, such as web printing presses, wherein the imprints are efiected on both sides of the web as it travels throughtheprinting couples, and has reference more particularly to the timing of the application of'antii-smutting fluid upon the tympan or backing cylinder of the succeeding couple for the still wet imprint made in the previous couple.

In presses of this type, the web rst `passes through al couple to receive an imprint o n one side of the web from thel printing cylinder of that couple, the other side of .the web being backed by an impression cylinder usually termed axtympan cylinder. As the web then travels to the succeeding couple,l where the cylinders are in reverse order, the unimprinted side ofY the web is presented to the printing cylinder of this couple, and the yet wet imprinted side is presented to the tympan cylinder. The latter tympan cylinder-has a tympan sheet covering and, to avoid transfer of ink upon this covering, an anti-smutting uid, such as oil,.is sprayed in a very line continuously during the opera on of the presa.

stopping only when the press stopped, with the disadvantage of using too much oil for proper eect, causing a considerable amount of oil fumes 'in the-atmosphere which are disagreeable and noxious, and also requiring the use ora large amountof compressed air for the spraying.

By the present invention, the spraying is eiless compressed air is necessary, thus eueeting considerable economy.

As another object of the invention is the Drovision of a novel timing means for controlling the spraying in given time relation to the operation of the` tympan referred to above.

A further object of the invention is to provide a novel adjustable means for the spraying means to aord access by the operator te certain parts of the press.

ther objects, advantages, apabilities, fea-v tures, and the like are comprehended by the invention as will later appear, and as are inherentk1y possessed'by the invention.

section, of a printing press embodying the lnfected automatically in given time relation to the rotation of the tympan and in given alternating or intermittent periods of time, such as for alternate revolutions of the tympan, or variables thereof. In other words, the spraying may occur for a revolution of the tympan and no spraying may occur for the next revolution, orr

nextV two revolutions, etc.. On the other hand,

the spray may be for any given4 angular movement lof the tympan and spraying stopped for'- any other angular movement of the tympan. -In

' vention;

Fig. 2 is a transverse'view in elevation of the same;

Fig. 3 isa side view of a timing device for the spraying of oil;

Fig. 4 is a view in elevation of the same;

Fig. 5 is a sectional view of a control valve forming part of the timing means;

printing cylinder 3 and altympan cylinder operated by suitable and usualmeans in such types 0f press.

At the Sides of the press and .on the base-'i' thereof are secured angle-form brackets each having a base flange 6 secured to the base E by bolts and an upstandlng flange At the upper portion of the flange I is secured a 'pivot stud 9 upon which is pivoted the lower portion of an arm 9. To the lower portion of the flangey 1 are secured spaced stop or abutment pins l0 against which alternately engage the lower end extension I-I of the arm 9 when swung from and to the positions shown in full and dotted'lines in Figl ofthe drawings.'

At the upper end portions of the arms 9 are' provided suitable apertures for the extension therethrough ci'A parallel manifolds or pipes I2 manifolds.

and I3 which pipes extend between' the sides I and 2 of the press and are supported at the upper end portions` of the arms 9, these pipes respectively constituting the air and material pipes or At an end the pipes I 2 and I3 are closed as by caps I4 andv I5, and at the other end are connected to flexible ducts or hoses I6 and I1, respectively. The material duct I1 leads upwardly through an upper platform I8 of the press, and is connected by way of a valved connection I9 to the lower `part of a material container 20, so that the material may flow by gravity through the duct I1 to the material pipe I3. The air duct I6 leads to a cam operated threeway valve`2 I, shown in detail in Fig. 5.

To the material `pipe I3 are clamped a plurality of spaced brackets 22 each carrying a spray gun 23 which may be of the type disclosed in the copending application of Bramsen et al., Serial No. 225,974, led August 20, 1938. Connected to the guns 23 are flexible material and air ducts 2'4 and 25 respectively connected to the material and air pipes I3 and I2.

The air is supplied from an air supply line 21 by Way of an air cleaner 28, pressure regulator 29, electro-magnetic or solenoid operated control valve 30, and a flexible air duct or hose 3l leading and connected to the three-way valve 2|,

The three-way valve 2I is shown in detail in Fig. 5. It comprises a body 32 suitably secured to a supporting bracket 33, an air inlet member 34 to which the duct 3| is connected, and an air outlet 35 to which duct I6 is connected. In the .K

body 32 is a double valve comprising valve elements 36 and 31 connectedby a stem 3 8, thev a relief passage 43 leading to outlets 44 in the outer end portion of the element 4I. To the outer end portion of element 44 is rotatably connected a roller 45 (see Fig. 3) against which a lcam 46 operates to reciprocate the element 4I in the body 32 of the valve. In operation, when the cam 46 actsagainst th roller 45, the element 4I is moved inwardly to close against valve element 31 to shut off passage of air to the relief passage 43, and to open valve 36-39 so as to permit air to pass by way of inlet 34 to the interior of lthe valve body 32 and thence out through the outlet 35. When the cam lobe 49 passes from the roller 45, the springs4 40 and 42 act to close valve 36-39 and to move element 4I so as to open relief valve 31-4I.

The timing device, shown in detail in Figs. 3 and 4, comprises the cam 46 secured to a shaft rotatably supported in a support 48, thev cam having a 180 swell or positive lobe 49 and a 180 dwell or negative lobe 60, so that for one half vrevolution of the cam-the lobe 49 will maintain -the three-way air valve 2| open, and for the other half revolution of the cam the valve will be-closed. Also secured to the shaft 41 is a pulley 5I driven by a belt 52 driven from a pulley 53 secured to the shaft 54 of the printing cylinder, the pulley 53 being half the diameter of the pulley 5I so that the latter will make but one revolution for each two revolutions of the printing and tympan cylinders 3 and 4.

The support 38 is adjustably secured to a stud 55, as by a set screw 56, rigid with an end of a Z-shaped bracket 51 bolted at its other end to an 16 upright 66 which is part of the side 2 of the press frame. I'he lower end portion of the support. 48 is apertured to slidably and rotatably adjustably receive the lower round end 59 of an S-shaped bracket 60 of rod form, such lower end 59 of the bracket being secured in adjusted position by a suitable set screw 6I. To the upper round end portion 62 of thebracket 66 is'slidably and rotatably adjustably secured a hub 63, as by set screws 64, the hub 63 forming a rigid or integral part of the three-way valve supporting bracket 33.

The cam 46, pulley 5I and support 48, as an aggregate, are angularly adjustable about the stud 56 to obtain the proper operative relation with the three-way valve 2l as is clearly shown in Fig. 3. The bracket 66 is so adjustable in the lower part of the support 48 and the valve support 33-63 are so adjustable on the upper end portion 62 of the bracket 60 as to cooperatively associate the three-way valve 2I with respect to the cam 46, as clearly shown in Figs. 3 and 4 of the drawings.

The surface of the tympan cylinder 4 is covered with a smooth surfaced sheet 65 or a rough surfaced sheet 66,f.as carborundum paper. When using the sheet-65, a roller 61 with a yieldable surface, such as the pile of a pile fabric, an example of which is plush, is so rotatably mounted as to have its pile surface 68 in contact with the surface of the sheet 65, and the battery of spray guns 23 are so located asto project fine sprays 69 of oil upon the surface df the plush roll. In the case of using the rough surfaced sheet 66, the battery of spray guns 23 are so located as to project ne sprays 10 of oil directly upon the carborundum Aprojections on the sheet 66 without the intermediary of the plush roll, but it is preferable to also use a squeeze roll 1I which has a surface of yieldable and elastic material, such as rubber, gelatin, or similar compositions, for the purpose of applying a very slight squeeze upon the points of the carborundum so as to assist in the` distribution of the minuteparticles of oil sprayed thereon.

The plush roll 61 so rotates that its contacting surface with the tympan travels in the same direction as the adjacent surface of the tympan but the surface speed of travel of the plush roll' is either slightly greater than or less than the .surface speed of the tympan surface or cover, so

that there will be a relative wiping action of the plush roll on the tympan While at the same time distributing the particles of oil upon the surface of the tympan cover 65. This differential travel acts to wipe away some of the ink that has been transferred to the tympan sheet from the freshly imprinted portions of the web. The surface travel of the squeeze roll 1I is in the same direction and with the same speed as the surface speed of the tympan cover 66.

The ratio of the pulleys 5I and 53 is two to one so that the spraying upon the tympan will be for alternate revolutions thereof, that is, the spray guns will spray for one full revolution of the tympan, during which the cam 46 makes a onehalf revolution, and will not spray for the next full revolution of the tympan, during' which the cam 46 makes its next one-half revolution. This is advantageous in that a suflicient amount of oil is sprayed during the alternate revolutions of the tympan' to produce the desired effect, and

there isI consequently a saving of air used to atomize the material and also a saving of oil which might otherwise be wasted in the atmosphere, if the guns were spraying continuously.

carried at the upper end portions of thearms` 9 so that the assembly may be swung back as to the dotted line position shown in Fig. l, to afford access by the operator in the press between the couple and the assembly` mentioned above. When the assembly is to be put into operation, itfis swung forwardly, as to the full line position shown thereof in Fig. 1 of the drawings.

in operation the material, such as oil, hows from the container 20 by way of valve i9, duct il, manifold I3, ducts 24 to the guns 23, where it is atomized and sprayed in a very fine spray upon the plush roll B1 or on the tympan sheet S6, as the case may be. The air under pressure flows from the supply pipe 21, by way of the cleaner 28, regulator 29, the solenoid operated control valve 30, duct 3i, to the three-way valve 2l. The latter is operated by the cam d6 which, when its lobe 4s opens the valve, causes the air to iiow by way of the duct I6, air manifold l2, and ducts 25 to the spray guns 23. The valve 2i is open for one-half revolution of the cam Q6 and closed for' the other half revolution thereof, during which time spraying willv be eiected for one full 'revolution of thel tympan and be stopped for the other full revolutionl thereof.

Figs. 8 and 9 'show diagrammatically the couples, the printing and tympan cylinders 3 and d of the second couple being in reverseorder to the printing and tympan-cylinders@i and 4" of the iirst couple, and the web W being shown in its travel in the direction of the arrows. As the web W leaves the couple 31a-te, it has the air to be supplied toy wet, imprint on its upper side, and as it reaches the couple --d this imprint is presented to the tympan d while the printing cylinder t eects'an imprint on the under side of the web. In Fig. 8 are shown the plush roll Si and guns 23 located with reference to the tympan li to apply the oil to the tympan sheet t5. in Fig. 9 are shown the guns 23 spraying directly upon the tympan sheet te, and the squeeze roll i l below and in contact with said sheet t6.

It is to be understood that the invention .com`

ized form for applicationto said sheet, a pressure air supply means is connected to said guns, and an oil supply means is connected to said guns; the combination of a cam operated valve in said air supply means,` a cam operatively associated with-said valve and having a cam lobe for operating'. said valve, means operatively connected to said couple and said cam for operating said cam, saidlobe being of such length as to hold said valve open for-the duration'of a -given angular movement of said tympan and'to close said valve during another given angular movement of said tympan. y

2. A device for timing spray operations for preventing smutting in a web type ofprinting press where there is contact of a freshly im printed portion of the web with the tympan sheet covering the tympan cylinder of the couple for effecting an imprint on the opposite side of the web from that bearing said freshly imprinted portion and wherein there are a battery of spray guns alined along the tympan to project oil in nely atomized form for application to saidsheet, a pressure air supply means connected to Isaid guns, and an oiifsupply means connected to said guns; the combination of a cam operated valve in said air supply means, a cam operatively assosaid tympan wherebyy the oil is sprayedfor a. given angular movement of said tympan and is.

stopped for another given angular movement of said tympan.

3. A device for timing theapplication' of oil for preventing smutting in a web type of printingv press Where there is contact of a freshly imprinted portion ofthe web with the tympan sheet covering the tympan cylinder oi the couple for effecting an imprint on the opposite side' of the web from that bearing said freshly imprinted portion and in which are a-battery of spray guns aiined along the tympan and so locatedl as to project oil in'finely atomized form for application to said sheet, and a rotating roller having a yieldable surface in. contact with said sheetfor distributing the sprayed particles of said oil over the surface of said sheet; the combination therewith of means for controlling the time of spraying in relation to the rotation. of the tympan, including means driven by the couple to cause the guns to spray intermittently for given angular movements of the tympan.

4. In a device for preventing'smutting in a web type of printing press where there is contact of a freshly imprinted portion of the web with the ments of parts, and the like without departing from thespirit of the invention. 1

Having thus disclosed the invention, I claim: l. A device for timing spray operations for I preventing smutting in a web type of printing press where there is contact of a freshly imprinted portion of the web with the tympan sheet covering the tympan cylinder of the couple-for eii'ecting an imprint on the opposite 'side of the web from that bearing said freshly imprinted portion and wherein there are spray guns a ed along the tympan to project oil in nely atoxnfI5 tympan sheet covering the tympan cylinder of the couple for eecting an imprint on the opposite side of the web from that bearing said freshly imprinted portion, and wherein oil is projected in'nely atomized form for applica-tion to the tympan cylinder by an assembly of sprayguns with an air manifold connected to said gunsand a material manifold connected to said guns; the combination of a sing support for said assembly adapted to hold'said assembly in operative position relative to said tympan for projecting material innely atomized forml and to hold said assembly away from said tympan to aiord access to said couple, means operatively connected to said couple and said assembly for causing said guns to project said material in said finely atomized form when said assembly is in said operative position in given time relation with given angular movements of the tympan.

5. A device for timing the application of oil for preventing smutting in a web type of printing press where there is contact of a freshly imprinted portion of the web with the tympan sheet covering the tympan cylinder of the couple for effecting an imprint on the opposite side ofthe web from that bearing said freshly imprinted portion and wherein are a battery of spray guns alined along the tympan and so located as to project oil in finely atomized form for application to said sheet, and a rotating roller in contact press where there is contact of a freshly imprinted portion of the web with the tympan of the couple for eiecting an imprint on the opposite side of the web from that bearing said freshly imprinted portion, and wherein there is an applying of theoil in minute particles over the surface of the tympan sheet covering the tympan cylinder, by projecting said oil in finely atomized form in a direction'for application thereof to said sheet, and distributing said particles of oil over said sheet during the revolutions of said tympan, the combination therewith of the step of applying said fine spray-of oil during only,

alternate given angular movements of the tympan cylinder. y

'7. A, method of timing the application of oil for preventing smutting in a web type of printing press where there is contactv of a freshly imprinted portion of the webwith the tympan of the couple for effecting animprint on the opposite side of the web from that bearing said freshly imprinted portion, and wherein there is an applying of the oil in minute particles of the tympan sheet covering the tympan cylinder by projecting said oil in finely atomized form in a direction for application thereof to said sheet, including the distributing of said particles of oil over said sheet-by effecting a slight squeezing action upon the elements of the lsurface of said sheet during all angular movements ofthe tympan; the combination therewith of the step of projecting said oil upon said pile surface of-the roll only during alternate given angular movements of the tympan cylinder. i Y 8. A method of timing the application of oil for preventing smutting in a web type of printing press where there is contact of a freshly imprinted portion of the web with the tympan of the couple for effecting an imprint on the opposite side of the web from that bearing said freshly imprinted portion, and wherein there is an applying of the oil in minute-particles over the surface of the tympan sheet covering the tympan cylinder-*by projecting said oil in finely atomized form in a direction for application thereof to said sheet, and a distributing of said particles of oil over said sheet; the combination therewith of the step of applying said oil during only alternate given angular movements of the tympan cylinder.

9.- A timing device for controlling the operation of spraying means having liquid and air supply A means in a printing press, comprising a spring pressed valve connected to the air supply means, a cam for intermittently operating said valve, drive means' operatively connected to the cam and to an operating part of the press, a cam support adjustably connected to a xed part of the press and operatively carrying the cam, a valve support carrying said valvel and adjustably connected to and carried by said cam support for maintaining the adjusted relation .of said valve and cam in all adjusted positions of said cam support.

' VIRGIL G. GREEN.

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