DE1436535A1 - Device for cleaning the cylinder surface of a printing cylinder - Google Patents

Description

H36535

Dr. Expl.

Device mute cleaning the cylinder surface of a

Printing cylinder a.

The present invention is generally concerned with means for reclining the cylinder of a printing machine, and is more particularly related new and useful improvements to a cleaning device that is specially designed to remove paint, fibers and other foreign matter from the printing surface of a printing press cylinder is applicable.

Offset printing machines currently have a gap in the blanket cylinder. In a sheet-fed or sheet-fed printing press, this gap is important for achieving the sheet-fed effect and can take up up to 25 % of the circumference of the cylinder. In a tape printing machine there is also a gap or an interruption in the printing surface, although this is kept as small as possible here and is normally less than 1 ⁿ long. In addition, in both sheetfed and tape printing machines, the rubber trough roller is generally supported in the machine frame with eccentric bearings. Both factors - that is, the cylinder gap and the eccentric bearing through which the cylinder top «

ο area takes up more than one position - lead to an under «

J? breaking or changing the position of the surface of the blanket cylinder

^ alleviate it if it rotates while printing.

«· * So far, β · Ublioh, the surface of the rotating Druok cloth cylinder »even as a 3rd point in» Arranging the cleaning

elements while cleaning the surface. In other cases, adjustable stops can be placed on the cleaning device itself or be provided on the machine frame. The cleaning mechanism must be rigid in place and during the cleaning process If the position of the cleaning elements is controlled by the surface of the blanket cylinder, ' but the bursting or wiping effect is impaired when the pressing force the cleaning device on the cylinder in the area of the gap is lifted. Also the arrangement of adjustment stops on the cleaning device or the printing machine frame is not a satisfactory solution because the blanket cylinder moves in an eccentric bearing.

It is also already known to bring cleaning liquid from a channel or the like. With the help of a rotating brush on the printing blanket cylinder surface, the brush picks up the cleaning liquid from the channel and brings it to the surface of the printing blanket cylinder. The disadvantage of this method is that it is difficult to control the amount of cleaning liquid applied to the blanket cylinder and that the bristles of the brush soon become contaminated with foreign objects, so that they no longer clean the blanket cylinder sufficiently or practically no longer clean it at all. These disadvantages are counteracted by the device according to US patent 3 Q89 415, according to which a corrugated scraper roller is provided in the liquid channel to bring the cleaning liquid to the brush and to clean the bristles of the brush the fibers and ferrous substances are deposited in the inside of the liquid and thus soon pollute the cleaning

liquid, so that it soon loses its ability to be cleaned and the channel emptied at intervals and with new liquid must be filled. Due to the arrangement of the stripping roller at the Device according to the above-mentioned US patent by the applicant, the cleaning liquid is more evenly on the printing blanket surface brought, but there must be an excess of liquid in the channel, which is fundamentally undesirable.

The invention is therefore intended to provide a new and improved cleaning device for printing cylinders, in which the disadvantages outlined above are avoided.

Another object of the invention is to provide a new and improved cleaning device for blanket cylinders, which can be used in both sheet-fed and ribbon offset printing machines.

Furthermore, the invention is intended to provide a new and improved impression cylinder cleaning MO Create rrichtung in which this device is unaffected by the gap in a blanket cylinder or the eccentric mounting of a blanket cylinder is held firmly in place during the cleaning process.

Another object of the invention is to provide a new and improved impression cylinder cleaning device create, in which this device by resting against a solid, uninterrupted surface firmly in the Cleaning position is held.

Another object of the invention is to provide a new and improved impression cylinder cleaning device create that the cleaning liquid without contamination by the previously from the cylinder top

IÖ9807 / ÖÖ23

removes substances from the surface onto the cylinder.

Another object of the invention is to provide a new and improved impression cylinder cleaning device create, in which a certain measurable amount of the cleaning liquid is applied to the printing cylinder surface will.

Another object of the invention is to provide a new and improved impression cylinder cleaning device create, which results in an improved distribution of the cleaning liquid on the printing surface.

The invention is also intended to provide a new and improved pressure cylinder cleaning device create, in which a self-cleaning effect of the cleaning element is available.

Further objects and advantages of the invention are in part set out below still explained or result from the further description or from the application of the invention; the implementation of the invention is by means of what is stated in the appended claims marked devices and combinations.

The invention consists in the new parts, constructions, arrangements, Combinations and improvements described here and shown in the accompanying drawings.

£> In a short summary, the present invention is characterized ^ thanks to a new and improved pressure cylinder cleaning con- »^ Structure in which the cleaning elements, preferably both

α.

σ * have a brush as well as a stripping roller and which are mounted and enclosed ^{in a pivotably arranged housing ω}

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are, by means of positively acting positioning or stop means are arranged in their respective working positions, these positioning or stop means with the Support of the printing cylinder are in engagement. The stop means can preferably consist of roller assemblies by means of adjustable mounting arms are mounted on the lid and the bottom of the housing of the cleaning device. The rotary brush swings back and forth when turned and is mounted in such a way that the ends of its bristles when rotated with a cleaning rod, with a channel, the ends of which are open, and - when they are is in the working position - come into contact with the cylinder surface of the printing cylinder. Funds are provided to bring a certain measurable amount of the cleaning liquid directly to the top of the brush.

In another embodiment of the invention, which is particularly useful for tape printing machines, the cleaning effect achieved exclusively by the brush element. The brush is mounted in a pivoting enclosure and is in the previously described manner arranged in the working position, the supply of cleaning liquid in the previously described Way done. It is provided here that the brush can continue to rotate after the cleaning fluid supply is closed has been j by the fact that the cleaning rod and the base

^ that the groove is in contact with the ends of the bristles of the brush

oo are agitated, the liquid and the Premdstoffe are in the

-J essentially completely from the bristles of the brush and consequently ° away from the pressure cylinder surface.

Of course, the above general description is the same

like the following detailed description of the invention, only by way of example and intended to explain the idea of the invention. not delimit. The cleaning device according to the invention is particularly suitable for cleaning the cylinder surface of a printing blanket cylinder, the mode of operation and construction The ideas on which the invention is based, however, are not restricted to this application; the cleaning device can can also be used with extremely satisfactory results to clean any printing surface, be it that surface is an offset blanket or printing plate. However, since the invention is particularly suitable for cleaning blanket cylinders is, the structural design and mode of operation of the invention will be described below using this application example.

The accompanying drawings are referred to below represent a preferred embodiment of the invention and, together with the description, serve to explain the Invention underlying principles.

Pig. 1 shows a side view of a cleaning device embodying the invention, this device in FIG their ineffective position in relation to a (only partially shown) blanket cylinder of a single-sheet offset printing machine shown 1st.

^ Fig. 2 shows a partially diagrammatic and partially in

-j Section executed partial front view of the cleaning equipment * ^.

direction according to FIG. 1, with the illustration of the cleaning elements the housing has broken away.

Fig. 3 shows a section along the line III-III in Fig. 2, this figure shows details of the cam bearing of the brush roller with which the reciprocating rotary motion of the brush is obtained.

Fig. 4 shows a section parallel to the representation plane of Fig.l through the middle part of the cleaning device, this figure showing the arrangement of the cleaning elements and details of the injection tube for the cleaning liquid, as well as the arrangement of the cleaning liquid channel below in contact with the cleaning brush.

In order to facilitate the description and understanding of the invention, only one end of a blanket cylinder and only one side of the cleaning mechanism is described in the drawings and in the following individual coating of an embodiment of the invention. For the person skilled in the art, it goes without saying that the cleaning elements extend essentially over the entire width of the printing blanket cylinder surface, that the printing blanket cylinder has a support at both ends and that the fastening and pivoting arrangements described here are therefore provided at both ends of the cleaning device, be it because, in the following description, a different explanation is given.

_{c £>} Reference is now made to the design shown in the drawings.

to form of the invention referred to. In Fig. 1 the loading denotes

° drawing 10 in general a new pressure cylinder cleaning arrangement »J

^ tion, in front of an only partially shown printing blanket cylinder

to ■ 12 of a single sheet offset printing machine is arranged. The cylinder 12 has a carrier 13 and a suitable one

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this attached printing blanket 14, a gap 15 remaining in the cylinder circumferential surface in a conventional manner.

It has already been said that the cleaning device according to that Invention can be used in the same way for cleaning the printing surface of any printing cylinder, for example for Cleaning an offset printing block or printing plate; the representation selected in FIG. 1 of a single-sheet blanket cylinder has only been chosen to explain the invention and is in no way intended to delimit the concept of the invention.

The cleaning device 10 has a housing with an upper and a lower frame 20, 21, their respective end plates 22, 25 firmly to one another by means of a plurality of retaining screw clamps 24 can be connected to form a rigid enclosure, the open front side 25 of which is the peripheral surface of the blanket cylinder 12 opposite.

The cleaning device 10 is provided on its rare wall 26 with a pivot 30 which is in the upper end part Jl of a support arm arrangement 32 is rotatably mounted, this support arm arrangement 32 is supported by a support arm 33 mounted on the printing machine frame shown schematically. The support arm assembly 32 has a pivot pin 34 mounted in a slot 35 as well

<o an angle lever support arm 36 which is pivotable on the pin 34 and ο

o is mounted at 37 on the support arm 32, the angle lever 36 being a 00

° has roller assembly 3β, which against the underside of one on the

ο the side wall 26 of the mounted bracket 39 is in contact. ■ ο

ω »

The cleaning device is operated by means of a compressed air cylinder 40 pivoted about the pivot 30, this compressed air cylinder

_ ft _

linder is constructed in a conventional manner and is flexible Pressurized gas lines 41, 42 is actuated in a known manner. The piston rod 43 of the cylinder 40 is pivotable on the pin 34 of the Bracket assembly 32 attached and the cylinder housing 45 of the cylinder 40 is pivotally attached to a stub axle 47 at 46, which protrudes from the side wall 26 of the housing of the cleaning device.

Oemäfl the invention stop devices are provided with the carrier 13 of the printing tube cylinder 12 come into engagement a solid, uninterrupted floor space for the rigid arrangement of the cleaning device in the working position for cleaning the printing tube cylinder surface to accomplish. According to the embodiment preferred here the stop device consists of roller assemblies 50, 51, which at the front ends of adjustable support arms 55, 56 are provided, these support arms on the top wall 52 at both ends of the upper housing frame 20 and on the bottom wall 53 are mounted on both ends of the lower case frame 21.

The pivot connections 46 and 34 between the housing 45 and the piston rod 43 are arranged in such a way that the compressed gas cylinder 40 moves the cleaning device 10 either into an inoperative position or into a position in which a brush is effective, or ^v

Bring to a position in which a stripping roller is effective ο

<° can. When the cylinder 40 is not pressurized, the travel

^ nigungsvorriohtung those in Pig. 1 ineffective setting ο set. Ute dl · cleaning device in that position

*> Bring in the dl "brush effect 1st, the cylinder 40 is

Al · Pruokgftieohlauo & Uitung 42 acted upon, so dad the housing

the device is pivoted about the pivot JO until the stop roller 51 comes into engagement with the carrier I3! the bristles of the brush 58 come into engagement with the cylinder surface of the printing blanket cylinder 12. The piston rod 45 is sufficiently long so that after the stop 51 has hit the cylinder 40, the stop 51 is kept permanently in firm contact with the carrier. It can thus be seen that the carrier forms a solid, uninterrupted surface in order to hold the cleaning device 10 rigidly during the bursting process. When the pressure is applied through the compressed gas hose line 41, the cleaning process is likewise carried out in the opposite direction , with the stop roller 50 engaging with the carrier 13, the stripping roller 59 engaging the printing blanket 14 in Intervened the entire cleaning device in the stripping st © llwng mt & rr is held.

Di® Burst® 58 is made by eisi @ r Weil® "61 g © trag @ n ₅ the aa ®ia © E IM © a» cylinder noeken. 62 ajäfneist (feg * 2 and 3) l at end © dg? R shaft 6l If a pivot 63 is vergesähea ^, dez »In Lag @ rn 64 © ines Lager» - "bloökes 65 is rotatably mounted, where öi @ s © r location ^ should 65 tn suitably firmly attached to the side wall 2β tmt _a Ein © with the cam 62 zusaaanenax * b "@itdnde HPLL @ 66 is fixed to the Endplatt® 25 m © _s nti®Tt said countershaft ^ msg 67 OCE to co wall 23 by means of luer © storage 67 and ein® S wi ©» d is ®B © currency auftratst _a in "> a screw 68 © ingssohfaufot on d @ r @ di roller 66 · _.

^ arranged igt. Di® Holl © 66 isfc auf dies® ¥ © Iio ^ © rstellbai »g®- o lagsE't, s © öai si © in d @ r aMtssifSralg ^ a M @ © teeiifläeli @ 6

The other end of the shaft 6l is with a suitable (not shown) Gear provided which is engaged with a suitable drive; an example of this is in the USA patent Applicants' 3,049,997 shown and described; to this The brush is rotated against the direction of rotation of the blanket cylinder. When the brush rotates by the drive this is moved back and forth at the same time by the rolling of the roller 66 on the cam surface 69, causing the brush to vibrate is granted.

The bristles of the brush 58 are preferably helical in shape rolled up on the shaft, like the one in Flg. 2 is shown so that a helical brushing action on the blanket cylinder surface is exerted, which in connection with the reciprocating vibratory movement is effective on the blanket surface has a cleaning scrubbing effect.

The brush 58 is rotatably mounted in the bearing block 65 in such a way that the ends of the bristles of the brush touch the bottom 71 of a channel 70 which is adjustably mounted on the bottom wall 53 of the cleaning device 10 by means of washers J2 and, for example, with screws 75 on this bottom wall is attached. The channel 70 is open at its ends and extends essentially over the entire length of the housing of the cleaning device, but ends shortly before the side walls 26.

^ The ends of the bristles of the brush touch near the top ° 58 a cleaning rod 75 * which is preferably a stationary one is an ordered rod with a corrugated surface. The rod 75 is what will be described in detail later - on the front

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plate 23 and the carrier 82 for the cleaning fluid channel fastened by means of a clamping nut 76 and a screw 77 or by other suitable means.

According to the invention means are provided to a certain measurable amount of cleaning liquid from above directly the top of the brush 58 to apply. According to the embodiment preferred here, these means consist of one in one Channel 8l arranged liquid pipe 80, the channel 8l on a support arm 82 is mounted from the end plate 23 substantially over and in the immediate vicinity of the brush 58 protrudes. The pipe 80 is via suitable connections 8? uneven connection line 84 connected to a pump (not shown), which delivers a measurable amount of the cleaning fluid in a timed manner Duty cycle can deliver. The pump is preferably a mechanically operated liquid injection pump, it can However, any simple motorized rotary pump could be used.

The cleaning liquid is injected into the tube 80 and exits through openings 85 in this tube, so that they Channel 8l fills; the liquid then enters as a result of its gravity through aligned openings 86, 87 in the channel 81 and in the channel carrier 82 onto the top of the brush 58. co The channel 8l is provided with a cover 88, on the one hand to ■

"> Prevent that debris comparable the openings 85 in the pipe 80 00

^ Stuff, and on the other hand, overflowing dor Reinigungsflüs-

_o sigkelt to report. A downwardly extending lip 89 is on

n> front end of the channel support 82 is provided and is used for.

uniform spread of the cleaning fluid over the Brush.

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In the preferred embodiment of the invention, a doctor roller 90 is provided which is carried by a shaft 9I the shaft 91 ends in a pivot 92, which is in suitable bearing

(1

like 92 of a bearing block $ 4 is rotatably arranged; the bearing block 94 is carried by a support block 95, which is suitable Catfish is attached to the side wall 26 and the face plate 22. As the squeegee roller 90 is in frictional engagement with the surface of the pressure cylinder is and is driven by it, the same bearings can be provided at both ends of the roller shaft 91. On the shaft 91 is under the outer absorbent Layer 97 - which preferably consists of an absorbent cotton material - preferably a sole 96 made of rubber or another shock-absorbing material.

The device according to the invention works as follows:

A certain amount of cleaning liquid is injected into the manifold 80, from where it is distributed throughout the channel 81 will. When the liquid escapes under the action of gravity from the openings 87 in the channel support and onto the top the bureau arrives, the pressure gas cylinders 40 are acted upon, so that the housing is pivoted until the Drehansohläge 51 come into engagement with the surface of the carrier 13 of the printing blanket cylinder, so that the brush 58 with the cylinder surface '-' :, the β pressure cylinder comes into engagement. The Druok gas cylinders

exert pressure on the surface via the rotatable stops

^ chen the carrier from, 'so that the cleaning device during ο the brushing process is held rigidly; the location of the Reiv> There is therefore no pre-notification by stopping the pressure 1 «area of the« column · 15 or through the eccentric fastening

the Drucktuchzyllnderärehlager bsi the rotation of the Linders impaired "The brush cleans and scrubs the Oserfliehe of Drucktuch®s, wherein Gi © © ®ntsprechende M®ng ύ®τ Ds * USK" liquid further to the B © @ a fsfe the Burst® g ®torEetife wiröi cta * «sh. the helical arrangement of the bristles of the wallet urn! the combined back and forth movement and turning movement of the bursts against the blanket effectively cleans the blanket surface »the channel u & teE» of the brush _s which are open and which are lined in such a way that the bottom fi © r Hinn © comes with the ends of the bristles in Elm ^ iff, the lip 89 of the EanalträgQFS 82 causes the smooth cleaning fluid on the cüq BtSrste ^ imd di @ s @ gl distribution is then continued such as _fl wonn while of the duration of the giasigs cycle with each ³ Uiiidreliiuas öqs cylinder of the b © r © ioli ö @ s gap 15 of the printing cloth fliniifflGE ³ ® τογ of the brush to lie granularly.

Di © Enäea des ⁵ BorstQß koüüisn s®u @ Iäl siit d. @ Ra B © ä®a dos ³ Eärni © al & M © Ia Hälfe d @ ra ger-iff @ lt © n HelnlgiMgsgifcsb in Bss ^ iilifungl b © id © s together with this b ©! ^ FrendlsfeoffGi, ii © zwfqv ¥ © n ca® © atf © rat been siiiM _p aias <ä © n bristles

Remove iE ©. Aussröeii feritfc JsäQgsäa.! äann ₅ ? ίβηη the gap 15 BruöktualizjlindeFO & e ^ fileli © -w & ^ ö @ f Burst® lies «a short

before you ₁ , while a @ r © in © self-protection of the brush

e »g@la.iS! this is achieved by atm BerlßiFMSg both with the bristle ends

^ ßoas Rolnigwngsstab & 13 & imh with ä®m Bqüqu α®ϊ * linn «caused.

_u> Hen recognizes that the supply of cleaning liquid to the top of the brush is constantly fresh cleaning liquid

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H36535 '

is brought to the blanket surface without the cleaning liquid would previously be contaminated by paint or foreign matter removed from that surface.

When the blanket surface has passed through a corresponding period of time has been processed with the brush, the compressed gas cylinders are acted upon in such a way that the housing in opposite Direction is pivoted until the stop rollers 50 come into engagement with the carrier IJ of the blanket cylinder, whereby the stripping roller 90 comes into contact with the cleaned surface of the blanket cylinder. The device is during of the stripping process rigidly in the manner described above held.

If not enough space is available to both the rotary brush as well as arranging the stripping roller, as is the case with certain belt presses, can according to another Embodiment of the invention the stripping roller can be omitted, so that the cleaning device only a rotary brush which is mounted in the manner described above. In this embodiment, the brush slackens a suitable one after switching off the cleaning fluid supply Rotate through the period. The cleaning rod 75 and the bottom 71 of the laterally open channel 70 work together in order to remove essentially all cleaning fluid and the foreign matter dissolved in it from the bristles of the brush - "- * nen and therefore essentially all cleaning fluid from the

Remove the surface of the blanket cylinder. The brush that no longer contains any liquid, then serves as a squeegee roller and not only wipes the cleaning liquid off the printing blanket

cylinder, but also causes, in addition to this stripping of the liquid, an evaporation of the same. Xrgendw © leh® möglleherweise remaining cleaning fluid marks on äesü Drucktuohzylinder be removed by the beginning of the introduced into the press paper tape ·

Di © invention is not ®hränkt to the described and illustrated embodiments of b ©© _s IMD are d®r in Rahnsen following claims modifications saöglioii _s olia @ thus leaving el ie principles of the invention ^ u and their Hauptvortüil® to

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Claims (1)

Claims 1. Device for cleaning the cylinder surface of a printing cylinder with support or bearing surfaces at the ends of the cylinder, characterized by a housing, by devices for holding at least one cylinder cleaning tool in this housing, by means for supplying cleaning fluid to the cleaning tool or tools Adjusting devices (40) to bring the housing into a working position in which the cleaning tool or tools are in engagement with the surface of the printing cylinder (12) and by means of attachment devices (50, 51) which are connected to the support or bearing surfaces (IJ) of the pressure cylinder cooperate to keep the housing in the working position, so that the cleaning device (10) is held rigidly in the working position during the cleaning process. 2. Device NaOH to claim 1, characterized in that the housing about a pivot pin (30) pivotally mounted 1st and DAFL di · adjusting devices (40), the housing normally maintained in un operative position and sohwenken around this pivot pin in the working position. JOM07 / OU29 3. Device according to claim 1 or 2, "dadurafo-g © k @ £ m shows that the display devices are adjustable on the ß @ MUiS @ stored malts (50, 51), which come into contact with the carrier or L & g © r surface (15) of the cylinder (12) by pivoting the housing, and "that the adjusting devices to pivot the housing into the working position hold the impact rollers (50, 51) against the carrier or bearing fiesta (1 g @ presses", Yorrichtung naßh claim l _s 2 or 5 ^ äadisa gsls ₅ that the Einriohtung @ n (80, 8l) ziä ⁵ Zisfuhs ³ csgi? EQisi liquid dies in a certain oosiurbarea 5 ο Yorriehtung naoh © iriQii ö © r- voeangolisnöen tiöaslsürst © (58) consisting® ^ on UQT ¹ Qa OfoG ^ sQit © di © siglcelfc ^ läführung and dtefon BQ ^ itQaQaden raife eh® to their β. ■ Device siaoh Änsp ^ noh 5 _ß äadureli- dal äas S @ hEuse EinriGfe «ng®n (7O ₀ 71, 7.) smj» FFQEidstoffan and ¥ @ rbi »aiieh @ r H © inigimgsliquidk @ ife from @ ®? Burst® (38) has ^ © ha @ daS the aiaf di @ brush g®I @ it © fe @ freshness β * 7 «VorFächtüng nash Änspruela 6 _a dadureh gelniinzeiohiwt ο br & iMlittt? Isolation liquid from burst "(58) (75) and »inex» flinne (70) btateh · «,, wob ·! ö «r tmd die chins v« refe «ilb & r stored bind vmu alt den \ The ends of the bristles of the brush come into contact. 8. Apparatus according to claim '7 * characterized in that that the cleaning rod (75) is a stationary, on its Surface is corrugated rod and that the channel (70) is open at its ends. 9 · Device according to one or more of the claims 5-8, characterized in that, in addition to the rotary brush (58), a stripping roller (59) is arranged as a cleaning tool is that the adjusting devices (40) for pivoting the housing can pivot this into a first working position in which the rotary brush (58) engages the pressure cylinder stands that the adjusting devices (40) for pivoting the housing can pivot this into a second working position, in which the stripping roller (59) engages with the printing cylinder stands, and that at least one stop roller (50, 51) is provided for each of these working positions, which through the Adjusting device (40) after pivoting the housing into the corresponding working position against the carrier or bearing surface is pressed. 10. Device according to claims 5 or 9, characterized in that that the rotary bearing of the brush (58) has a nook J? arrangement (62) with a cam follower mounted on a masonry-proof ö roller (6), which has a reciprocating movement of the rotary ^ effect the rotation of the brush, O O 11. The device according to claim 5 or 9 *, characterized in that that the bristles of the brush (58) are arranged helically on the rotatable brush body. 12. The device according to claim 5 or 9 *, characterized in that that the device for supplying the cleaning liquid has a pump and one connected to this pump, in parallel above the cylindrical rotary brush (58) arranged liquid delivery channel (80, 8l), wherein the pump is suitable is to lead a certain, precisely dosed amount of the cleaning liquid into the delivery channel and the delivery channel the cleaning liquid dispenses evenly on the top of the brush. 15 «Device according to claim 12, characterized in that that the delivery of the pump for the cleaning fluid takes place in time coordination with the work cycle. - 20 -