DE1954027U - FEED DEVICE FOR SHEET-SHAPED MATERIAL. - Google Patents

Description

EA.666 459 * 20.1266

Dec. 19, 1966

Itek Corporation ■ · '- "-.'.

. 1-0 Maguire Road '' ■ - .. '■' _-_- ■ _
.Lexington 75 Massachusetts. " _: ■"'■ A 28 676-jafdsz.

Feed device for sheet-like

. ^: Material

The present invention relates to a .feed leg · » Direction for sheet material, especially for offset printing sheets or the like., The. Leaves over .Guide organs run through a treatment liquid.

A feed device of this type is already known in which the sheet material to be treated is held between opposing, endless belts and revolves with them (US Pat. No. 2,889,762). However, experience has shown that such a device is not very suitable for treating stiffer sheet material such as Offset ° printing plates or »printing sheets. Such a thing Sheet material consists e.g. of plastic on both sides coated paper, being on a plastic surface a light-sensitive emulsion or the like is applied. The total thickness of such a slate is approximately 0.007 ".

The greater rigidity compared to conventional photo paper leads to difficulties with the passage of the sheet in the feed or treatment device. Difficulties are increased by the fact that the emulsion layer. on contact with the treatment liquid, e.g. a developing liquid or the like., becomes extremely soft. The soft emulsion layer is in a the automatic treatment device easily damaged, as a result of which the quality of the impressions suffers; As a result of the When the emulsion layer is softened, the sheets also tend to warp and curl, which is also special Makes management action necessary. With regard to the listed aspects, the known feed « facilities have not yet led to satisfactory results «In particular, if the tape is guided on both sides, ■■; .., of the sheet material, the disadvantage that the access of the treatment liquid by the extensive contact. between Ribbons and sheet is affected.

In addition, a feed ^{device has become known:} (US Pat. No. 5 ογ8 0 $ 4), in which sheet material passes between pairs of rollers. Here a better access of the treatment liquid is possible, but on the other hand new difficulties arise, in particular because of the already mentioned tendency to curvature with ..., " . wrap around the roll yi and

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give cause for operational disruptions «However, in addition to increased construction costs, additional guide organs cause greater friction and thus increased mechanical stress on the sheet material. Außerdenist a mere Walzenvorsehub moist sheet material to maintain a consistently accurate run little ^one position suitable "

. The object of the invention is to create a feed device with which the disadvantages of the known devices with little construction effort are avoided * at. a feed device of the type mentioned is characterized the solution specified according to the invention for this purpose in that an upper and a lower arrangement of guide · = and Drive pulleys with at least one endless, revolving

: Tape is intended to be attached to a sheet and that with mutual distance in the longitudinal direction of the tape au the axes of the disk assembly essentially

.Parallel rollers are arranged over the continuous

'-.'.'· 'at '. - : ■ '■■■' :. _; ... "; * ^: - ·.:." ... ■ "■ · ..- '.." \ • Sheet on the outside of the tape / lying *' - "-" - · ■ "-; ■ · '.;'.; ■■. ··'. " .

According to a further development of the invention, the feed »- device aiäch are formed in such a way, the rollers are arranged in one level and with the same extent » speed as the belt assembly are driven. The device according to the invention can also advantageously be developed in such a way that a plurality of

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Rollers arranged on the opposite sides of the belts are · Another embodiment of the invention is characterized in that a plurality of rollers with their bearings , su a releasably connected to the rest of the device Structural unit are summarized. Proceeding from this can the execution can also be chosen so that two frames for holding the rollers on both sides of the bracket Ribbons arranged with their disk assemblies and with these are connected to form a structural unit. ■ -:.

Separate or combined use of the various features of the invention results in a feed device that prevents damage to the emulsion layer during operation and operational disruptions due to curvature of the moist sheet material. The feed device according to the invention is also very simple in construction and also offers; for maintenance and repair if necessary, easy and simple handling.In particular, the cleaning of the device after a long period of operation and the replacement of individual parts can essentially be carried out by inexperienced persons and without special tools . . _f

Further features and advantages of the invention emerge from the following description of an exemplary embodiment, which is shown in the drawings. Herein shows

Pig # 1 .. .... a perspective view of a .er * » V ■ inventive feed device,

[ · ■ ;;. ;; -, · "■ -. ' · "->'·'" -... ■ "■>.;''. ^, ] ' _r " '.-,".■;. ■ - Fig *. 2 - a sectional view according to level 2 * 2 '' J Fig. 1- V '

Fig. 3 is an exploded view of the feed "'device.,"

The embodiment shown is a · '■■■ Feed device 10 for flexible offset => printing plates ■ or print sheets * Such a sheet is generally 'Introduced from above into the feed device 10 and

goes through this first in descending order to a deflection

place in the lower area, the facility and then v in an ascending direction to the exit point at the

Top of the »facility. During the run dives , the sheet in a treatment liquid, which the • Feed device 10 surrounds. The feed device will completely immersed in .the treatment liquid, so that the latter penetrates into all cavities and with the preference *

wise outwardly directed emulsion layer of the leaf ^: comes into contact. '; ⁵ '^? ^: - ■; '- ;. '■''·,'; ^: ' ^v . ■ '

The feed device 10 is via a gear 11

in unspecified: illustrated manner with the drive of the

Gesaratanlage connected. A series of intermingling Toothed rims 12 connect an upper and lower disk shaft. 13 and 14. The gears 12 are also used for. J , Roller drive, as will be described further below. \, " The gears 12 are expediently made of plastic and ν; .. '■ are attached to their shafts by circlips 15 *> ;.

The disk shafts 13 and 14 are provided with a plurality of drive disks 16 and 17, which are axially spaced from one another, instead of the latter. also step a continuous roller. Endless belts 18 run over drive disks 16 and 17, which preferably come into contact with the back of a printing sheet passing through the feed device. As a result of being moistened by the treatment liquid, the printing sheets tend to roll up with a concave rear side Curvature. The one at the. Ribbons 18 resting against the back of the sheet ensure that the sheets are adequately supported and held straight. The belts therefore have a double task in the feed device, namely the. Blade drive on the one hand and the maintenance of the 'desired blade shape on the other hand * · ■■.; ■ ' ■) ■■ - ■ _ ;. '. '.

The sheets are fed through by means of at a distance parallel rollers 20 arid belts 18 adjacent guided. The rollers 20 are made with the same

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■ · ■ ·. · ■ ■ ■ - '-. ■ if- ■

Peripheral speed as the belts 18 are driven, via corresponding gears 19 * with the already mentioned gears 12. mesh. The gears are expediently also made of plastic and are connected to the rollers 20 by pins 21 as well as on their shafts are secured by rings 29.

The rollers 20 are arranged in two sets in frames 22 and 25 on the descending and ascending side of the belts 18, respectively. The frames 22 and 25 are connected to the storage and the drive of the belts 18 to form a structural unit. ■ In the example, the frames are connected to the belt arrangement in a simple manner using 2K angle profiles.

The rollers 20 are mounted with stub axles in bushes 25, which are inserted with corresponding guide grooves in slots 26 of the frames 22 and 25 and are displaceable transversely to the belt direction. This arrangement allows the rollers 20 to move transversely to the belts 18 to a certain extent. The rollers 20 are pressed against the belts 18 by spring force. For this purpose, hairpin springs 27 are provided, which are fastened with their central turns on bolts 28 on the frames 22 and 25 and engage with their arms in corresponding grooved ends ¹ bushings 25. This bracket allows removal of the.

Springs and rollers in a simple way without the aid of. Tools, since for this purpose only the arms of the springs 27 are bent and the orphans are removed from their slots 26

to become need. Done in an equally simple manner the rolling in, the arms of the springs 27 snap into the corresponding grooves of the sleeves 25 » The resilient mounting of the rollers 20 allows a retreat from the system position on the belts 18 and in this way prevents damage to the feed device in the event of malfunctions on the moving sheets, fides

V is of particular importance for the treatment of offset "= printed sheets, as they have comparatively high mechanical strength, for example due to plastic coating, and can lead to impermissible deformation of components in the event of a malfunction if they hit against guide" and drive "elements. ' _v

The passage of a sheet in the feed device can be followed with reference to FIG. Such sheet Jl '■] is "fed from an exposure station or other treatment station of a EinlauxÜhrung 30» SB From here come the sheet immediately sur Berühruhgsstelle, between the top roller 20 and the belts 18 ·. The sheet is preferably oriented so *.

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that the uncoated backsole is attached to the tapes 18 , lies · The sheet then moves between the parallel ..

as well as rollers 20 arranged in a vertical plane _; and the belts 18 through on the left side (Fig. 2) of the feed device downwards, the treatment liquid being able to pass freely between the rollers 20 to the emulsion seal of the sheet. As a result, the treatment liquid will have an intensive effect _; · ensured: ^■■; \ V ^{V :; ·} / · ■ '- ^·:. - -; ', · ■. ^; · ''. "",

As soon as the leading edge of the sheet -; during the downward movement over the lowermost roller 20 comes out of the left side of the feed device, becomes the already mentioned tendency of the sheet to curve ■; effective under the action of the treatment liquid, the sheet bends in the same direction as the belt on the circumference of the lower drive disks 17 Is the deflection below the transport discs 1? one Arranged guide. . Λ r

In the example, if this guide consists of a plate with attached guidewires 33 * correspondingly ■ '■ of UmfangskrUmmung the drive "slices 1? are bent * The guide wires 33 are transversely to the blade erection across the width of the blade at a distance from one another

10

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arranged, so that here too only a small proportion Leaf surface covered and thus free access of the treatment liquid guaranteed 1st * The plate with the guide wires 33 is attached by conventional means to the frame 23, in such a position that the deflection of the sheet and its reentry between, the lowermost roller 20 on the right side of the feed device (Fig. 2) and the bands 18 is achieved. Then the leaf runs on the right side of the device with the belts 18 up to the exit point.

The guide at the lower deflection point can, for example also designed in a manner not shown, that a correspondingly curved guide plate is in • Direction of travel extending * across the width of the sheet Distributed at a distance and to the inside of the curling the plate receives directed, rib-shaped bulges " Such a shape can be made by pressing in the usual way Way can be reached easily .. Even with such a Execution is free access of the treatment liquid guaranteed between the spaced-apart hips "

A further guide Jk is arranged at the exit point of the pre-compression device, through which the emerging sheet to a subsequent treatment station>

11th

aB rait to a similar feed device. ,. repeated passage of a treatment liquid, ge «-, is conducted» The shape or curvature of the guide Jk, the ".. - also again from a plate 35 with a curved guide"

wires 36, depends on the desired ■■ * Direction of flow of the sheet. The spaced apart -Guide wires in turn only cause slight contact «, ■ surfaces with the leaf passing through, which means that the braking · lcraft is diminished · Same advantage jist by the way also effective for the lower deflection with its spaced guide organs »/ ..,.

. The feed devices according to the invention can be put together in any number, possibly with the involvement of customary, compression devices between different types of treatment belts, on a comprehensive range of treatment lines * < ^v -

Claims (1)

RA. 6R6 <r69-20.12.66 A 28 676-jafdsz ^{n S} P V'l "» Feed device for sheet-like material, in particular for offset printing sheets or the like, wherein the sheets ; ■ ',. Run over guide members through a treatment liquid, characterized in that an upper and a; Lower arrangement of guide and drive disks (1 $ or IT) with at least one endless, circumferential bay (18) -.; .. '■, · -. " aur arrangement is provided on a sheet (51) and that with mutual spacing in the longitudinal direction of the belt to the .Achsender disk arrangement (16 ,; 17) essentially parallel rollers (20) are arranged, which rest on the belt outside via the continuous sheet (31) ., 2, feed device according to claim 1, characterized in that the rollers (20) are arranged in one plane and are driven at the same peripheral speed as the band extension (16, 17). ·-: 1 . ^{y <} 5 «feed device according to claim 1 or 2, characterized = draws that a plurality of Walzeh (20) on the opposing pages: of the volumes jt ^ XlÖ) arranged isfc *. ■ ^: - ■ '- ■' ■ '■ "^ - ^: ^ V ^ iy-- ^: ^' ^ r ■■ ■ ■ 2 Λ »Feed device according to one of claims 1 to 3," characterized in that on the lower disc an », : Order (17) as Umlenkst eileι the tapes (18) one ,; ; '. :, · Guide for the continuous sheet (31) is arranged, > the one extending in the direction of travel of the belt. About the . ΐ Sheet width arranged distributed with mutual spacing and according to the pulley diameter, curved guide · = »; .... "." ./. organs (33) has » _; H; · ■ · / i; ^ν _Λ : C - "■ '/'." · ■■ ■ · '-'>^;'"".'. ^ '~''; ■■■ '■:'"-' r · - 5v feed device according to claim 4, characterized in that guide ^{wires (33) attached to the lower deflection part on L of} a plate (32) are provided as guide elements ; are seen. ■ .- "'-; - ■■.".'-;·;> / ,,. - ^ - _: .-; .. · ■■■ - ;, ■? -._: '- ■ ;. . ■ ■ ".", - ■. ■■, ■■■ "■,, 6t. Feed device according to claim 4 "characterized in that that as a guide at the lower deflection point there is a ~ ; corresponding to the disk diameter curved plate with ν inward, moving in the direction of travel of the belt " stretching, rib-shaped bulges is provided. 7 · Feed device according to claim 2, characterized in that the upper and lower disk arrangements (16 and 17, respectively) and the rollers (20) are interconnected by a series of. meshing gears (I2 _y 19) coupled and driven together *. - " 8. Feed device according to one of the preceding claims, · ,, characterized in that the rollers (20) with their Gears (19) in a frame (22 or 2?) With a ·. resilient locking connection (27) are releasably inserted. j? .. Feed device according to one of the preceding claims characterized in that a plurality of rollers (20) are combined with their storage to form a unit detachably connected to the rest of the device ok Feed device according to claim 9, characterized in that _; that a plurality of rollers (20) with their bearings (25) · ■: ". inserted in slots (26) of a common frame (22 or 2>) displaceably transversely to the direction of belt travel and., by springs (27) against the On the outside of the band " , 11. Feed device according to claim 2 and claim 9 or. 10, characterized in that two frames (22, 25) for Mounting of the rollers (20) on both sides of the mounting of the belts (18) with their billet arrangements (16, 17) and are connected to these to form a structural unit. ,