US2236239A - Coating machine - Google Patents

Description

March 25, 1941. i LIPTON 2.236.239

comma mcnma Filed April 23, 19's? SSheets-Sheet 1 lNVENTOR :5 11102112 Agni W, M w M v ATTORNEYJ March 25, 1941. M, proN 2,236,239

' COATI'NG MACHINE Filed April 23, 1931 5 SheetsSheet 2 INVENTOR glam Ls Ljpiwz ATTORNEYJ' I March 25, 1941. M, LIPTON 2,236,239

co'xrm momma Filed April 23. 19s? 5 Sheets-Sheet 4 46a INVENTOR jllorns 111722012 i 340 v I BY v I March 25,-194ip MUPTON 2,236,239

COATING MACHINE Filed April 23, 1937 5 Sheets-Sheet 5 455 INVENTOR ATTORNEY? Patented Mar. 25, 1941 was,

cos-mad moms 'MUM RfitkhedorlNJsasdgnortoGencorporation, New York, N. Y.,

eralrrlnting acorporaflonofnela Application April 2:, 1m. Serial No. team 13 Claims ((181-5.)

My invention relates to machines utilizabie for applying a coating of a liquid material such,

for example, as ink, varnish, paint or the like to sheets of material of a desired character. Machines of this general type are commonly utilized for applying a suitable coating to metal sheets both before and after a printing operation effected on said metal sheets. It shall be understood that the present invention is not to be limited to the treatment of metal sheets.

My invention has particular reference to improvements in coating machines of the class described whereby they may be operated effectively and efliciently for the intendedpurp ses.

More particularly. an; invention relates to a novel mounting arrangement for the coating machine assembly comprising the fountain and transfer roller and, further, the invention relates 2 to a novel adjusting and mounting arrangement for a scraper knife, to no novel mounting. and

tilting arrangement for a pan or receptacle disposed below the supporting roller of said coating machine, and to a novel gear arrangement for operating the fountain and transfer roller of the coating machine.

Various other objects, advantages and-.cliarac- 'teristics' of my invention wilibecome apparent from the following detailed description. My invention resides in the coating machine, features, arrangements and combinations of the character hereinafter described and claimed.

For an understanding of my invention and for an illustration of one of the forms thereof, reference is to be had to the accompanying drawings, in which:

Figure 1 is a side elevational view, partly broken away, showing a coating machine as constructed in accordance with my invention;

Fig. 2 is a front view of the machine shown in Fig. 1;

Fig. 3 is a vertical sectional view, partly in elevation, and is taken onthe line 8-1 of Fig. 2; Fig. 4 is ahorizontal sectional view, partly in plan, and is taken substantially on the line H of Fig. 1;

Fig. 5 is a horizontal sectional view, partly in plan, and is taken, on the line i--! of Fig.1; Fig. 6 isa side elevational view showing the coating machine of my invention;

Fig. 7 is an enlarged, fragmentary sectional view taken substantially on the line 1-1 of Fig. 2 looking in the direction of the arrows; and

Fig. 8 is a fragmentary, sectional view taken gear wheel I meshing with and driving a gear substantially on the line 8-8 of Fig. 2 looking in the direction of the arrows. H g H Referring particularly to Fig. 2, F, Fl represent spaced frame members as well known in the coating machine art, these frame members 5 being connected together and "braced in any suitable manner. Each of these frame members has a bearing bracket i suitably secured thereto, as by the screws 2, Fig. 1, these brackets I being disposed in horizontal alinement so' asto form 1 bearingsfor a horizontal drive shaft 3 adapted to be rotated by an electrical motor or other suitable source of power, not shown.

Secured to one end of the shaft 3 and rotatable therewith is a pinion 4 which meshes with and 1 drives agear wheel 5 secured to and rotatable with the extreme end So of one shaft extension of a supporting roller 6 formed from suitable material as known in the art, the shaft-extensions of which are mounted in bearings formed in the respective blocks I, la mounted for slidable movement in vertical slots 8, la formed,

, respectively, in the frame members F, Fl, these shaft end a, the shaft extension of said roller 0 terminates in an end ib -to which is fixed a wheel ll loosely mounted, for example, on the aforesaid shaft 1. The gear wheel l0 meshes with and drives a gear wheel ii disposed thereabove, Figs. 1' and 6, said gear wheel ll being mounted on an axle i2 rotatably mounted in a supporting bracket I3 secured to the frame Fi by screws "a, and said gear wheel ii being of double width so that one peripheral section thereof meshes with the aforesaid gear wheel i0 while another peripheral section thereof meshes with and drives a gear wheel I mountedon the extreme end lid of one shaft extension of a composition roller ii, the shaft extensions of which are mounted, respectively, in bearing blocks l0, ita slidable in the respective vertical 45 slots I'I, l'la formed in the frame members F, Fl. As indicated in Figs. 1 and 3, each of the hearing blocks il, "a is biased upwardly by a helical spring ll and, further, each bearing block may be moved downwardly against the expansive 5o force of the associated helical spring ill by a rod it, these rods I! being suitably threaded through i the respective members Isa suitably fixed to the upper sections of the respective frame mem-' bers F, FI. and each rod is comprising a hand wheel 20. Obviously, by adjustment of the wheels 20, the composition roller l5 may be moved to a suitable-vertical position as determined by proper operating practice.

Former integrally with or suitably secured to the aforesaid bearing blocks I, 1a are the respective supporting plates 2|, 2|a, Figs. 1 and 5,

connected, by a pin 23a, to. a lever arm 24, and.

the lever arms 24 being secured to and oscillatory with a shaft 25 extending horizontally between and mounted in bearings in the frame members F and FL thereof, has secured thereto an arm 25 which, as shown in Fig. 1, may comprise an arcuate slot 26a cooperative with a pin 21 carried by and projecting from the adjacent frame member.

As illustrated in Fig. 1, the shaft 25 carries a counter-balancing weight 25a.

Toward the rear of the machine, Fig. 5, the aforesaid supporting plates 2|, 2| a carry a horizontally disposed transverse rod 23 to which, adjacent each end thereof, a supporting bar 23 is pivotally secured, Fig, 1, these supporting. bars 23 extending toward the front of the machine and, at their-forward ends, carrying the respective pivot pins 30. Pivoted to each pin 3. is;a link 3|, these links 3| extending downwardly and being secured to the respective lever arms 32 which are oscillatory with a horizontal shaft 33 mounted in hearings in the frame members F and Fl, said shaft 33 adjacent the outside face of the frame member F, carrying a worm wheel 34 with which meshes a worm 34a carried by a shaft 34b mounted in bearings formed by a bracket 34c secured to said frame member F, the shaft 34b carrying an actuating hand wheel 34d. As

indicated inFigs. 1 and 3, the bars 29 are shaped in such manner that they form a stable support for a pan or receptacle 35 having an outlet pipe 35, the pan resting on said bars 23 and,'as will be understood, is readily detachable from said bars 29 when they are positioned as shown in Fig.3.

i e aforesaid supporting plates 2|, 2|a, at their forward ends, are-provided, respectively, with horizontally alined slots or oval passages 2|c forming bearings for a horizontally disposed shaft 36 which, between the supporting members 2|, 2| a, has a scraper blade holder 21 suitably secured thereto, as by set screws 3!, Fig. '7. As shown in Fig. 5, the shaft 35 may extend through passages formed in the respective frame members F, Fl, such passages being suiiiciently large to prevent contact of the respective shaft ends with said frame members.

Coactable with the supporting roller 6 is a scraper blade 4|! formed from suitable spring steel, or equivalent, said scraper blade 4| being held tightly between clamping members 4| by a pinrality of screws 42, Fig. '7, and the lower clamping member 4| carrying a plurality of handles 4|a accessible through passages formed in the holder 31, Fig. 2. The assembly comprising the scraper blade 40 and clamping members 4| is disposed in anincllned channel 31a extending lengthwise of the scraper blade holder 31. Preferably, in

accordance with the invention, the lower clamp- The shaft 25, at one end ing member 4| has a plurality of lugs 43, Fig. '1, projecting downwardly therefrom and received. respectively, in recesses 44 formed in the adjacent surface of the scraper blade holder 31. In accordance with the invention, the scraper blade holder 31 is provided with a plurality, as five or more. of passages which extend substantially horizontally when said scraper blade holder 31 is positioned as shown in Fig. 7, these passages being internally threaded for the reception of the respective adjusting screws 45, each of which terminates at oneend in a section 45a coactable with the scraper blade assembly and at its other end in a finger wheel 45!). In order that the adjusting screws 45 may be locked in desired positions, each of them may have a wing nut 48 threaded thereto, each wing nut being coactable with an adjacent surface of the scraper blade holder 31. I

At its projecting end adjacent the frame mem ber F, the aforesaid shaft 38 has a hub 41 fixed thereto so as to be oscillatory therewith, this hub comprising a projecting arm 39a which terminates in a lateral section 39b, Fig, l. with this lateral section 3912 is a screw 48 having an operating hand wheel 48a, this screw 43 being threaded through and adjustably mounted in a bracket arm 49 secured to the adjacent frame member E by bolts 50, Fig. 3,-and said screw 44 carrying a locking nut, if desired. Referring to Fig. 4, each of the frame members F, Fl is shown as supporting a transverse bearing member 55, these members 55 being hori- "zontaliy alined, Fig. 2, and, in turn, pivotally supporting the respective side frame members f, fl of the fountain assembly, these frame members extending upwardly from the fork-shaped sections thereof which are associated with therespective members 55 and said frame members I. 1| being disposed in alinement with the respective frame members F, Fl, Fig. 4.

Each of the frame members 1, fl is provided with a slot 51 and these slots are disposed in horizontal alinement for the reception of a bar 53 which is soldered or otherwise'suitably secured to the bottom of the fountain pan or receptacle 5!, said bar 53 projecting beyond opposite respective sides of the pan 53 so as to be received in the respective slots 51, and said pan 5! being received between the frame members I, N, Fig. 2. Each frame member 1, fl may have a hook 60, Fig. 1, pivoted thereto, these hooks cooperating with the bar 53 to positively retain the pan 5! detachably in its intended position.

Each of the frame members I, fl is provided with a passage 3|, these passages being disposed in horizontal alinement and each passage having a block 52 suitably guided therein in a freely slidable manner. Each block 52 is suitably Each screw 54 is threaded through a'plate 85 suitably secured to the adjacent side member by screws 85 the screw threads'between the screw 54, the block 62 and the plate 55 being in compound relation.- Usually, it is desirable that a pointer 61 be secured to each plate 65, each pointer 41 coacting with a drum 5! rotatable with the adjacent screw 84.

The aforesaid blocks 82 serve as bearings for the shaft ends of a roller 69 which dipslnto the liquid medium contained in the fountain pan '53,

Coactable the roller 6|, as well known in the art, being designated as the fountain roller.

- Coactdbie with the 'fountain'rolier I and with the aforesaid composition roller ii is a transfer roller II, this roller being horizontally disposed and the-shaft ends thereof being journaled in the respective frame members I, ll

-'l it the upper end of the machine, each of the frame members F, Fl carries a fixed projecting spective springs 13' helically disposed on the members II, respectively, each spring I! having a guard sleeve, not shown, disposed therearound if desired. As shown in Figs. 1 and 6, the front face of each of the aforesaid frame members I, II has fixed thereto a ring shaped member 14 through which the adjacent member 'll extends. Each member ll comprises a front cam-shaped surface Ila with which coacts a cam surface 150 of a sleeve ll loosely mounted on the associated projecting member H which extends therethrough. As clearly appears from the drawings, the extreme front end of each member H has a sleeve nut ll threaded thereto, each sleeve nut comprising anoperating hand v wheel 16a.

As shown in Figs. 2 and 3, that sleeve II at the right comprises an arm 11 which, by a link It, is connected to an arm ll of the cam sleeve II at the left, said arm It c rising a pair of spaced lugs 10a coactable with an abutment ll upstanding from the adjacent-frame member I. said arm 19 further comprising an actuating handle "D.

As shown on the drawings, each of the'aferesaid arms 11 and ll has I ured thereto a pointer 8i which coacts with a scale formed on the periphery of a drum .2, each ef-theslee've nuts It having one of these drums I associated therewith if desired.

' In accordance with-the invention, the hereinbefore described fountain and transfer rollers 6! and II are rotated, by power supplied thereto through a gear arrangement of novel construction.

Thus, the aforesaid gear wheel I, which is connected directly to the sourceof power as d and which does not mesh with the gear wheel ll, Fig. 6, is disposed in meshing relation with respect to a gear wheel 81 mounted on an axle ll projecting horizontally from-the frame member Fl. The gear wheel 83 meshes with a-gear'wheel l5 rotatably mounted on the aforesaid bearing member 55 which connects the frame members FI and I] together. The gear wheel 0! meshes with a gear wheel '8 mounted on the end "a of one shaft extension of the fountain roller 0. The gear wheel 06 meshes with a gear wheel 81 mounted on the end Ila. of one shaft extension of the transfer roller ll. As clearly appears from a consideration of Fig. 6, the gear wheel ll does not mesh with the aforesaid gearwheel ll.

With the parts positioned as shown in Figs. l

and 2, the supporting roller l is in its upper posi-' tion and the composition roller I I', under the control of the threaded rods It, is in a lower position so that it is ,in engagement with said supporting roller 6. I

Under such circumstances, the hereinbefore deupper sections of 'th'e'--- which is to be coated scribed source of drive shaft I so as to rotate the same with the result that the pinion 4 operates the gear wheel I whereby rotation is imparted to the supporting thereby rotate the composition roller ii, the lat- 1, rotating in a clockwise ter, as shown in Fig. direction.

,As stated above, the gear wheel 0 rotates in a clockwise direction, Fig. 6. This gear wheel 8 meshes with and drives the gear wheel I: which,

in turn, drives the associated gear wheel 05. The

latter, namely, the gear wheel I! meshes with and drives the gear wheel fl which is mounted on the end a of one shaft extension of the fountain roller ll. As a result, the fountain roller 00,. as shown in Fig. l, is rotated in a clockwise direction. The gear wheel 86 of the fountain roller meshes with and drives the gear wheel l! which is secured to the endlfla of one shaft extension of the transfer roller I0- whereby the latter is re tated in a counter-clockwise direction, Fig. 1.

The fountain roller 09 dips in that liquid coatingagent, ink, varnish, paint or the like, which is contained in the receptacle 5! and, in the usual manner as known to the art, rotationof said fountain roller 89 causes a film or layer of such coating agent to be deposited upon the transfer roller It which, in turn, effects the deposition of a film or layer of the coating agent upon the composition roller l5.

power may be connected to the With the various rollers rotating in the respective directions, Fig. 1, described immediately above, the operator causes the sheet material v to be moved from right to left, Fig. 1, so that the same passes between the supporting roller 6 and the composition roller ll whereby the liquid coating agent from the receptacle I is applied as a thin film or layer upon the upper surface of sheet material, the'latter, when a beyond the two rollers 6 and it, moving downward into engagement with a set of belts, not shown, carried by pulleys, not shown, the latter being mounted on a nection to the main shaft 3.

The operation described above is the same or shaft adjacent the sup-- porting roller i, this shaft being. driven by a consubstantially the same as is customarily practiced in connection with coating machines of the prior art. However, the machine of my invention embodies several improved features as hereinafter more fully described.

Thus, with reference to the fountain assembly, the hand wheel a of screw 84 may be rotated in one direction or the other to cause the fountain roller is to move laterally of its horizontal axis so that the pressure with whichit engages the transfer roller I0 may be adjusted as desired to effect a desired application of the'liquid coating when the actuating handle 19b is positioned as shown in Figs. 1 and 2 to hold the fountain as- I5 agent tosaid transfer-roller Ill. 'I'hereafter,

be rotated in one direction or the other to thereby slightly move the fountain assembly either toward or from the composition roller I! whereby the .transfer roller 10 is caused to engage said .composition roller It with a desired degree of pressure to thereby eifect a desired application of the liquid coating agent to the composition roller.

Subsequently, when operation of the machine is discontinued for any reason, the handle 19b may be swung in a clockwise direction, Fig. 2, whereby the cam surfaces 15a of the respective sleeves II are moved so that they face the respective cam surfaces "a of the members H, respectively. When these cam surfaces are thus related, the springs II become effective to swing the fountain assembly clockwise about its pivotal axis from the position thereof shown in Fig. l where-. by the transfer roller 10 is disengaged from the composition roller l5. In as simple a manner, when operation of the machine is again to be initiated, the handle section 19b may be returned to the'position thereof shown in Fig. 2 whereby the pairs of cam surfaces described above coact to swing the fountain assembly counter-clockwise to its position as shown in Fig. 1 whereby the transfer roller 10 is returned to its former selected position in engagement with the composition roller II.

The adjusted positions of the fountain roller 89 and the fountainassembly per se as effected by rotation of the respective hand wheels 64a and 16a may be noted by observation of the position ofthe pointer 81 with respect to the scale on the drum 8., and also by observation of the positions of the pointers, II with respect to the scales on the'respective drums 82. Therefore, when it becomes necessary to change any previous setting of the fountain roller 6! or the fountain assembly per se' for cleansing, repair or other purposes, it-

is very simple thereafter to restore the previous settings with a marked degree of precision.

, As hereinbefore described and by reference to Fig. 6, it will be noted that power for operating the fountain roller 69 and transfer roller III is obtained from a mechanical connection leading to the gear wheel 9 on the shaft end ibof the supporting roller In contra-distinction to prior art arrangements, power is thus supplied toisaid fountain and transfer rollers independently of the composition roller IE or the gear wheel associated therewith. Accordingly, the fountain assembly may be moved in either direction about its pivotal axis as hereinbefore described and, in so doing, no problem arises with respect to meshing of the gear wheels l4 and 81,

,8. 6, since, as shown, these gear wheels are never in meshing'relation and there is no necessi't'y of having them thus related.

Asidefrom the foregoing, .it is advant and desirable for the power which operates" the composition roller II on the one hand and the foundation roller 0! together with the transfer roller-1| on the other hand to be applied over s parate connections leading from the gear wheel Q. Moreover, with the disclosed arrangement, the gear wheel 88 may be pivotal axis of the fountain assembly and this is desirable because eliminating any need for disturbing the meshing relation of any of the gear wheels when said fountain assembly is moved I With the arrangement of my invention and as disclosed herein, the scraper blade ll may be removed from the machine and reassociated therewith at will with a' minimum of inconvenience. Thus, when the hand wheel a is operated to move the screw 48 upwardly, Fig. 1,

the holder 31, under the influence of gravity, swings in a counter-clockwise direction, Fig. 1,

rotatablymounted on the whereby the scraper blade assembly is removed from contact with the supporting roller 6." With the holder 31 in the position just described, the operator may grasp the handles lid and, after elevating the scraper blade assembly so that the lugs 43 clear their respective recesses 44, said scraper blade assembly may be moved forwardly and downwardly whereupon it may be turned sidewise and removed from the machine. Usually, the scraper blade assembly is thus removed from the machine when it is desired to clean the same. After this has been done, it is obvious, in view of the description appearing above, that said scrap- .er blade assembly may be reassociated with the contact with the supporting roller 6.

In case the described movement of the screw 48 does not position the scraper blade ill in proper scraping relation with respect to the supporting roller [throughout the entire length thereof,

one or more of the screws may be adjusted to thereby positively force any desired section of said scraper blade 40 into close engagement with a desired surface of said supporting roller 6;

Obviously, such adjustment of one or more of the screws I so controls the position of the scraper blade II that the entire length thereof may readily be disposed in proper manner with respect to said supporting roller 0.

In accordance with an important feature of the invention, the scraper blade assembly may be removed from ,the holder 31 for cleansing or other purposes in the manner described above, this being accomplished without changing the ad- .iustment of any of the screws I. vTherefore, when said scraper blade assembly is returned to its normal position in the holder 31, it necessarily assumes the same relationas previously existed with respect to the surface of the supporting roller 6. This, obviously, is a decided improvement as compared with prior art arrangements. The receptacle II isadapted to contain a liquid agent, such as one of the same character as is contained by the receptacle 59, the supporting roller b dipping into the liquid agent contained in said receptacle I! so that any of the coating agent which is transferred to said supporting roller I from the coating roller I5, particularly at the supporting roller edges and longitudinally thereof along the boundary line between the edges of the sheets to be coated, is kept in moist condition so that it may readily be removed by the scraper blade 4!. Further, this liquid agent in the receptacle II lubricates' the entire peripheral surface of the supporting roller l'so as to prevent the formation-of dry areas or zones with which the scraper blade would otherwise contact with resultant undue wear of the inter-enoccurs by way of the outlet pipe Ila which may be disposed above a suitable bucket, not shown.

In accordance with an important phase of the invention, the hand-wheel ltd, Fig. 1, may be rotated to lower thesupporting bars 18 to the position illustrated inFig. 3, for example, so that the receptacle 3! assumes a tilted relation as shown, the liquid, contents thereof meanwhile escaping by way of the pipe 35a. When thus positioned, the receptacle 3! may readily be grasped by the hands of the operator, removed, cleaned, and then returned to the position shown, whereupon the hand wheelJld may again be operated aging parts. Overflow from the receptacle 35 to raise the bars 29 and receptacle II to the normal position thereof shown in Fig. 1.

When the supporting roller G'is to be lowered, the arm 26 is moved downward from the position thereof shown in Fig. 1 to that shown in Fig. 3. In so doing, the supporting plates 2|, 2ia are moved downwardly a distance corresponding with the downward 'movement of the bearing blocks 1, la. Accordingly, the ends of the bars 29 at the transverse rod 28 are moved downwardly to a slight extent although the ends of said bars 29 at the pivot pins 20 remain substantially stationary. Therefore, when the supporting roller 6 is moved downwardly under' the control of the arm 26 as stated, the receptacle 35 is moved downward in a tilting manner and thus is removed from the downward path of movement of said supporting roller 6 so as not to impede downward movement thereof.

The adjustments which may be imparted to the fountain roller and to the fountain assembly have been described hereinbefore in some detail. These features of the invention are of distinct importance'because adjustment of the fountain roller 69 with respect to the transfer roller 10 does not change any relation which had been previously established between the transfer roller 10 and the composition roller l5. Further, the adjustment of the. transfer roller 10 with respect to the composition roller l5, which, as stated, is

effected by manipulation of the sleeve nuts 18,

does not change any relation-which had been previously established between the fountain roller 69 andthe transfer roller 10.

The composition material on the operative face of the roller I is apt to and does sag when said roller l5 remains stationary for any appreciable length of time. Therefore, in accordance with the invention, a suitable electric motor, not shown, may be geared to the composition roller -l5 so as to rotate the latter ata very slow rate of speed when the machine is idle.

While the invention has been described with respect to a certain particular preferred example which gives satisfactory results, it will be understood by those'skilled in the art after understanding the invention, that various changes and modifications maybe made without departing from thespirit and scope of the invention and it is intended therefore in the appended claims to cover all such changes and modifications.

What is claimed as new and desired to be secured by Letters Patent is:

I. In a machine of the class described, the combination with a roller adapted to apply a liquid coating to sheets of material, of a fountain assembly adapted to transfer the liquid material to said roller, said fountain assembly comprising a fountain roller coactable with a transfer roller which in turn is coactable with said first named roller, said fountain. roller being rotatably mounted on a laterally adjustable axis and said transfer roller being rotatably mounted on 'a fixedaxis, means for adjusting the position of said fountain roller with respect to said transfer roller, means forming a pivotal mounting for said fountain assembly, and means for holding said fountain assembly in such position that the transfer roller is maintained in suitable coacting relation with said first named roller, said last named means comprising a spring arrangement for biasing said fountain assembly in one direction, said last named means further comprising a cam arrangement for moving said fountain assembly against the force of said springarrangement. sald last named means further comprising mechanism for adjusting said cam arrangement whereby the operative position of said transfer roller with respect to said first named roller may be determined with precision.

2. In a machine of the class described, a frame structure, horizontally alined bearing blocks mounted for .vertical movement in said frame structure, a supporting roller rotatably mounted in said bearing-blocks, a plate fixed to each bearingblock, means whereby the-plates form a support for a receptacle disposed beneath said supporting roller, and manually controlled means fixed to the plates whereby said supporting roller may be raised or lowered at will.

3. In a machine of the class described, a frame structure, horizontally alined bearing blocks mounted for vertical movement in said frame structure, a supporting roller rotatably mounted in said bearing blocks, a plate fixed to each bearing block, a supporting bar arrangement pivoted to the plates, a receptacle carried by said supporting bar arrangement and adapted to contain a liquid medium into which said supporting roller dips, and manually controlled means fixed to the plates whereby said supporting roller may be raised or lowered at will.

4. In a machine of the class described, a lower supporting roller and an upper composition roller forcoating sheets of material, a fountain roller and an associated transfer roller for transferring liquid material to said composition roller, means for operating said supporting and composition rollers, and means for operating said fountain and transfer rollers, said last named means being independent of said composition roller.

5. In a machine of the class described, a lower supporting roller and an upper composition roller for coating sheets of materials, a fountain roller and an associated transfer roller for transferring liquid.- material to said composition roller, and meansdriven by said supporting roller for operating said composition roller on the one hand and said fountain and transfer rollers on the other hand, said means comprising power-transmitting connections leading in different directions from said supporting roller. 4

6. In a machine of the class described, a lower supporting roller and an upper composition roller for coating sheets of material, a pivoted assembly comprising a fountain roller. and an associated transfer roller for transferring liquid material to said composition roller, means for operating said supporting and composition rollers, and means for operating-said fountain and transfer rollers, said last named means comprising a gear wheelrotatable on-the pivotal axis of said assembly.

7. A fountain assembly for a machine of the class described, said fountain assembly comprising a fountain receptacle adapted to contain a liquid medium, a fountain roller adapted to rotate in such liquid medium, means forming an axis on supporting roller and adapted to contain a liquid 5 frame structure, a

' roller, and means distance from said supporting roller,

medium into which said supporting roller dips. a support which holds said receptacle normally in substantially a horizontal position beneath said supporting roller, means forming a pivotal mounting for said receptacle adjacent one end thereof, and means for moving said support on its -pivotal mounting whereby said receptacle may be gradually tilted into an inclined position.

9. In a machine of the class described, the combination with a supporting roller for the sheets of material," of a receptacle beneath the supporting roller and adapted to contain a liquidl medium into which said supporting roller dips, a support which holds said receptacle normally in sumantially a horizontal position bene'iith said supporting roller, means forming a pivotal mounting for said receptacle adjacent chit-end thereof, and means for moving said support on its pivotal mounting whereby said receptacle may be gradually tilted into an inclined position, said last named means comprising worm and worm wheel mechanism manually operative for the purpose specified, said receptacle being readily removable from said support when the latter is in a lower tilted position.

10. An arrangement for cleaning the surface of a coating machine supporting roller, said arrangement comprising supporting means, a shaft mounted for oscillatory movement on said supporting means, a holder carried by said shaft and movable therewith, a scraper blade carried by said holder for coaction with said supporting for retaining said holder in such position that the scraper blade is in engagement with said supporting roller, said means being operable to release said holder whereby said scraper blade may be spaced a substantial said means comprising a single operating member having a 40 threaded shaft coactable with an arm projecting from one end of said first named 11..In a machine of frame structure,

blocks mounted for shaft.

the class described. a

horizontally alined bearing a vertical movement in said supporting roller rotatably mounted in said bearing blocks, a plate fixed to each bearing block, a supporting bar arrangeaaaasso ment pivoted to the plates, a receptacle carried by said supporting bar arrangement and adapted to contain a liquid medium into which said supporting roller dips. and a manually actuatable mean for tilting said supporting bar arand a spring for biasing said fountain assembly from said first named roller, said last named means further comprising an operating member for adjusting said cam whereby the operative position of said fountain assembly may be determined with precision. l

13. An arrangement for cleaning the surface of a coating machine supporting roller, said arrangement comprising supporting means, a shaft mounted for oscillatory movement on said supporting means, a holder carried by said shaft and movable therewith, a scraper blade carried by said holder for coaction with said supporting roller, clamping members secured to said scraper blade, and means for retaining said holder in such position that the scraper blade is in engagement with said supporting roller, said means ,being operable to release said holder whereby said scraper blade may be spaced a sub? stantial distance from said supporting roller, the assembly comprising said scraper blade and said clamping members being readily detachable as a unit from said holder when the latter is in the position last named. said means comprising a single operating member having a threaded shaft coactable with an named shaft.

isomers LIP'roN.

arm projecting from said first

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