US1825837A - Roll cleaning machine - Google Patents

Description

Oct. 6, 1931. G. VON WEBERN 1,825,837

R01 1: CLEANING MACHINE Filed May 12, 1936 2 Sheets-Sheet 1 duotmqd Oct. 6', 1931. VON WEBERN 1,825,837.

ROLL CLEANING MACHINE Filed May 12, 1950 2 Sheets- Sheet 2 Patented Oct. 6, 1931 UNITED STATES PATENT OFFICE GUIDO VON WECBERN, OF DAYTON, OHIO, ASSIGNOR TO OXFORD VARNISH CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN ROLL CLEAENING MACHINE Application filed May 12,

The object of this invention is to provide an improved and effective mechanism for cleaning the surface of large composition rolls and the like. Composition rolls used in wood, marble and like graining methods are usually formed with a suitable hard core and a tacky resilient outer layer of composition material, the major components of which are glue and glycerine. A well known method of graining is to remove the ink or pigment medium from an etched intaglio plate having the design thereon, by moving a large composition roll first into rolling contact with the plate and then into rolling contact with the subject to be grained, causing the pigment material which adheres to the composition to be impressed onto the subject. To provide adequate surface for plates and subjects varying greatly in size, the composition rolls are sometimes made. very large, say three feet in diameter,-and are supported on a suitable trackway so as to move from rolling contact with the plate on a suitable table into rolling contact with the subject, and then beyond both the plate and subject to a position favorable to cleaning the roll of surplus pigment. Usually the roll is suspendingly supported and a convenient means for cleaning the roll is to provide a scraper blade and associated pigment softening means on a suitable mounting below the composition roll.

The cleaning method usually followed consists in frictionally driving the composition roll against a scraper blade in contact with the roll. In following this method, it has been the practice to lower the composition roll into contact with the scraper blade, but it has been found very difficult to maintain pressure between the scraper blade and the roll which will be most effective in scraping off the pigment. This in mainly due to the extreme weight of the composition roll and attendant difficulty of properly supporting it for fine adjustment with relation to the scrapen.

To overcome the difficulties heretofore encountered, I propose to mount the scraper blade and a friction roller. for turning the composition roll. which roller may also apply a suitable softening fluid to the compo- 1930. Serial No. 451,594.

sition roll, in such manner that the scraper and friction roller may be manually lifted into uniform contact with the composition roll, thereby enablin the operator to sense and maintain the desired contact pressure.

Other objects and features of the invention will become apparent from the following description relating to the accompanying drawings. The essential charactristics will be summarized in the claims.

In the drawings, Fig. 1 is a side elevation ofsuitable graining equipment showing the composition roll cleaning mechanism disposed with relation to the composition roll in position preparatory. to cleaning the roll; Fig. 2 is a side elevation of the roll cleaning mechanism viewed at right angles to the showing of Fig. 1; Fig. 3 is a sectional plan view of the base portions of the cleaning mechanism, as indicated by the line 3-3 on Fig. 2, and Fig. 4 is a detail view in which the scraper, frictional driving roller and the associated parts are shown in operative relation to the composition roll surface.

Referring in detail to the drawings, 1 indicates an overhead trackway which may be suitably supported for receiving a carriage 2 mounted on rollers 3 engaging the trackway, the carriage having downward extensions, one of which is shown at 4 for supporting the composition roll C. By means of the trackway and carriage, the roll may be moved over a table (not shown) supporting cooperating printing equipment; for example, an etched intaglio plate, diagrammatically indicated at P, and a subject to be grained, such as a metal or Swood panel, diagrammatically indicated at Any suitable arrangement for maintaining the desired rolling contact between the comosition roll and the plate or the subject may be provided; for example, the table or the roll or both may be vertically adjustable. As shown, the roll G has an axle 5 arranged in inclined slots 6 of the depending members 4 of the carriage to permit the roller to be easily removed from the carriage when necessary. The carriage may be equipped with a chain hoist (not shown) by which the roll may be lowered to the floor of the building support- 1 arm 7 attached to the axle and capable of I being turned to various positions and locked as by set screw 8 on the arm, arranged to engage ad acent surfaces of the member 4. The

roll C may, by moving the carriage, be

brought into rolling contact with the plate P to take pigment therefrom, and by further movement of the carriage. be brought into rolling contact with the subject S to transfer the design picked up by the composition roll onto such subject. Some of the pigment of course adheres to the roll after the subject is ,printed and this must be removed.

To clean the excess pigment from the composition roll, the roll is now conveyed by the carriage to a position above the cleaning mechanism (as in Fig. 1), which latter mechanism forms the subject matter of this application.

The cleaning mechanism comprises a main supporting frame, including two side frame members 10, for a scraper blade 11 (see Fig. 4) and a relatively small roller 12 mounted adjacent the scraper. The roller 12 may be formed partly or entirely of wood,and preferably has its outer surface portion formed of material which will take up a cleaning solution, such as benzine, from a pan, such as 13. The pan is suitably supported on the frame and so designed that the level of cleaning fluid in the pan may be maintained above the lowermost portion of the roller 12. The pan may have its ends supported in any suitable manner in the frame members 10, and has a drain cock at 13a.

In addition to the roller 12 there is provided a small knurled, driving and composition surface supporting roller 14 in contact with the composition roll and closely adjacent the scraper blade 11. The two rollers 12 and 14 are arranged to be suitably-driven at substantially the same surface speed.

The scraper blade 11 may be pivotally mounted at its ends in suitable supports not shown) and is arranged to be held in contact with the roll C by means of a compression spring 15 interposed'between-an arm 16 on the blade and a spring support 17 carried on a triangular framework having diagonal parts 18 extending into respective bracket formations 19 on the frame members 10. A suitable means for driving the roller 12 while in contact with the composition roll may comprise an electric motor, designated 20, and mounted on one of the frame members 10, which motor has a reduction gearing connection with the roller 12 to thereby turn the composition roller slowly. As shown,there is a driving pulley 22 on the motor, which, through a suitable belt 23, drives a larger pulley 24 conveniently supported near the top of the frame. The pulley 24 may drive the roller 12 through further reduction gearing, diagrammatically indicated at 25 in broken lines in Fig. 1.

In order to adequately support the frame members 10 and the above described mechanism carried thereon for vertical movement, I have shown the members 10 as provided with vertically spaced outstanding ears. These, as shown, are in pairs 27 and 28, and each ear slidingly embraces a rigid vertical guide bar 30. There are four of these bars shown, two at each side of the machine, and each two may be rigidly supported on a base member 31, these being adapted to be secured directly to the floor of the building containing the mechanism. Each of the ears may be provided with hearing members, such as Babbitt metal bushings, indicated in broken lines at 32 in Fig. 2, in order to provide free sliding vertical movement of the frame members 10 on the guide bars. v

To raise and lower the frame members 10 and cleaning mechanism into engagement with the composition roll, I provide a cross shaft 35 joining the frame members 10 and having suitable'bearing brackets 36 in these -fram'e members; the cross shaft supports,

near its ends, pinion members or sectors, as desired, indicated at 37. The pinion or sector members are fast on the shaft and each pinion engages a stationary rack 38 mounted in vertical. position on the base supports 31 which are, as has been mentioned, stationary, being secured to the floor. The racks are guided by suitable channel formations 40 rigid on the frame members 10, but which, of course, slide on the racks as the frame members 10 are lifted and lowered.

A suitable arrangement for turning the shaft 35 to thus raise the frame members 10. equally at each side to maintain uniform pressure between the scraper blade and composition roll throughout the length of the blade. may comprise an arm extending forwardly and upwardly, as shown in Fig. 1, the arm having an outstanding pedal member 46 by which the operator may raise the roll cleaning mechanism with his foot. The operator in thus maintaining contact between the blade and composition roll, soon becomes accustomed to the feel of the blade against the roll, so that he'may impart just the right pressure to completely clean the roll butnot enough to damage it or the blade.

It will be seen from the above description, that the roll adjustment, with relation to the plate and subject to be grained, need not be changed at any time, since the cleaning mechanism may be brought up to the roll irassess? It will be seen from Fig. it, that the roller 12 by reason of itspartial immersion in the cleaning liquid in the pan l5 softens the pigment material just before the pigment covered surface reaches the scraper, and that the roller 12 also furnishes the necessary.

drive for the compositionroll. With the arrangement of the scraper shown, the pigment scraped ofi' the roll simply flows down the inclined upper side of the scraper blade into the pan and is removed, with the cleaning fluid, from time to time as this becomes c necessary.

I claim: r

1 ln combination, a composition roll, means arranged to carry the roll into contact with a pattern and a subject, said means being arranged to carry the roll to a suspended cleaning position, and a cleaning mechanism comprising a scraper arranged to contact with the roll, means to advance the roll surface over the scraper and means to elevate sald mechanism whereby the vertical ad ustment of the roll does not have to be altered to complete the cleaning operation.

2. In combination, a re]. cleaning device including an elongated scraper blade adapted to' scrape pigment from the under side of a roll. and a self contained rigid frame for said device, a supporting slideway guiding the frame for vertical movement and a rack and pinion mechanism interposed between the frame and support said mechanism being arranged to simultaneously lift all parts of the frame to thereby carry the scraper with the scripping edge in uniform contact with the ro 3. lin a roll cleaning mechanism, a frame, a roll support arranged to carry a roll to a position above "he frame, roll cleaning means on said mechanism, and a device for raising said frame to cause the roll cleaning mechanism to coact with the composition roll, said device consisting of a plurality of substantially vertical racks, respective toothed members engaging the racks, and unitary means for turning both toothed members under the control of an operative for raising the frame with the cleaning mechanism into contact with the roll.

a. Mechanism of the lfind described, com

prising an overhead roll support, including a trackway and carriage for supporting the roll, a frame, means iding the frame for vertical movement r0 cleaning mechanism supported on said ame and arranged to contact with the roll when the frame is raised, there being means associated with said frame, comprising a fixed rack, a support therefor, means on the support slidingly engaging the frame to guide the same for vertical movement, a toothed member turnably mounted on the frame with the teeth thereof in mesh with the rack, and means for turning the toothed member to thereby raise the frame.

5, A roll cleaning machine arranged to clean the underside of a. roll supported above the machine, said machine comprising a pair of side frame members, a roll cleaning device, including a scraper blade, supported by said members, a plurality of slide forming posts adjacent respective frame members, means on the frame members slidingly embracing said posts, fixed racks one for each frame member, a cross shaft adjoining the two frame members, arcuate toothed members fixedly mounted on said cross shaft and engaging the racks, and means for manually turning the shaft to cause the roll cleaning device to be raised into contact with the roll.

In testimony whereof, l hereunto afiix my signature.

GUIDQ voN WEBERN.

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