US1971641A - Means for marking paper in process of manufacture - Google Patents

Description

' Aug. 28, 1934. F. CAREY 1,971,641

MEANS FOR'MARKING PAPER IN PROCESS OF MANUFACTURE Filed March 12, 1934 Patented Aug. 28, 1934 UNITED STATES.

PATENT OFFICE Means FOR mama PAPER IN raoc'nss- F mnmmncruan 14 Claims.

My invention relates to devices provided in a paper making machine by which an endless driven marking felt belt is employed for striping or marking a paper web while still in making in the machine. 1 l

Such marking or striping was heretofore generally done in the third press section of the machine. Since this press necessarily includes a web carrying felt, if the paper web was to be marked, it was first necessary to remove the ordinary plain felt carrying the paper web and substitute for it a felt provided with the desired marking elements. Similarly, when plain paper was again to be produced, the marking felt had to be removed and replaced by a plain felt. Such changes of the feltrequire approximately 90 minutes. Considering the present high speed of production, a verysubstantial loss in production resulted.

One object of my invention is so to arrange the devices of the web working assembly that the marking felt may be readily removed with only a very short interruption of the use of the machine, and as readily replaced in the machine. A further object of my invention is to eliminate clogging of the marking felt, and also the drying to an excessive degree of the paper weir in the marking or striping operation, both of which faults produce poor marking of the paper sheet, also cause undue wear of the marking felt.

It was customary to employ in the said third press section a bottom roll covered with a soft rubber or yielding surface, and atop roll of brass or gunmetal. Between these rolls, and under the paper web ran the marking felt, one side of which was smooth, the other side having the marking elements standing out in relief, that is projecting from the surface. As the web passed thru the nip of said third press rolls, the design of the taken up from the paper web by the marking felt, and that fiber particles from the web tended to cling to the marking felt, with the result that incapable -of performing its duties effectively. The carrying off of such considerable moisture from the paper web tended to render the web too dry for holding. the imprint of the marking felt, and thus produced a poor or blurred marking of the paper sheet. The clogging of the impression face of the felt by fiber particles from the paper web caused the felt to draw tight in the center'of the roll, that is, at its crown or head,

and ahead; and this caused the felt to wear marking felt was pressed into the overlying paper web. I discovered that too much moisture was the marking felt in time became clogged and.

.a relatively "short marking felt, and have the marking felt overlying instead of underlying the paper web. These marking devices may be conveniently incorporated in the smoothing press section of the paper machine, and the marking devices so arranged that their use is optional, and that they may be placed in or out of action within a few minutes.

Further, by my invention, the marking of the web is independent of third press, which may or may not be used, and if used functions as usual.

By my invention the relief surface of the marking felt is pressed down into the paper. web whilethe latter is supported on a smooth unyielding surface. I have discovered that by such arrangement little, if any, of the moisture in the paper web is removed, and fiber particles from the paper web do not cling tothe projecting impression'elements of the marking felt. This results in neater, clearer marking on the paper and greatly prolongs the life of the marking felt, thus effecting a considerable saving.

Heretofore, in order toproduce good marking effects on the web, it was necessary to reduce the speed of v the paper making machine. I have found that with my invention the machine, when employed for marking or striping the paper web, may be run at the same speed as when employed for plain grades of paper. n

The carrying felt of the third press is usually of considerable length. In my invention the marking felt can be relatively short, and thus there is a substantial saving in the cost of this felt.

Furthermore, by my invention, the pressure of the marking felt on the web can be readily adjusted; since imprinting pressure can be obtained by the weight of the top roll alone, or augmented I by imposing additional weight on the top roll.

The accompanying drawing shows diagrammatically a side elevation of a smoothing press section of an ordinary paper making machine embodying my invention.

a and b represent smoothing rollers in a paper making machine, the lower roller :1 having a smooth metal surface is journaled in the machine frame c, and the upper roller b being faced-with rubber or similar suitable composition is journaled in'a member t slidably supported by the .arm d pivotally mounted on the frame c as at e. The journal member t has a flange at the top which overhangs and slides on the ledge t o1. the arm of,

and journal member if is threaded on the screw t2 so that the turning of the screw t2 will move the journal member t, and therewith the roller b to the right or to the left. The lower portion of journal member t is attached to the upper portion by the pin t3 and held adjacent to the upper portion by the bolt t4. Thus the journal member it may be opened up should it be desired to remove roller 1) from its journal bearing. A rod 9' is attached to the free end of each arm d by a pin f, on the lower end of which rod g is rigidly mounted a lateral arm h adapted to engage a hook i. A lever arm 9' is pivoted on the frame c by a pin k, carries a movable weight 1, and engages the lower end of the hook i. The rod g is threaded as at m, and a ratchet nut o is threaded on said rod for the purpose of raising the latter and thus the arm d and the. upper roller b. The rod g slides in openings in offset flanges p and p of the frame 0, and the nut 0 bears against the upper flange p, when the rod g supports the upper roller b in raised position.

1' represents guide rolls for the marking felt s. When the roll b is raised the marking felt s may be tightened, that is its slack taken up, by lowering the arm u movable on the post p, on which arm is journaled a guide roller u. The raising or lowering of the arm u is done by means of a worm and gear operated by a hand wheel 12, or other suitable means. The paper web 20 passes between the said smoothing rolls a and b. The pressure of the upper roll on marking felt s and on the paper web while passing thru the nip of said smoothing rolls imprints the paper web.

The pressure of the upper roller 21 on the marking felt and paper web and lower roller a may be increased by the pull of the lever arm a on the rod 0 thru the hook connection i, or other suitable means. When it is no longer desired to use the marking felt, the lever 9' is lifted and the hook 1' released from the lateral arm h. Then the rod 9 is screwed up by the ratchet 0 or other suitable means until the roller b is entirely removed from contact with the paper web w. The slack in the marking felt s is taken up by lowering the felt guide roller it thru the turning of the hand wheel 0. The paper web w after taking up its slack, then continues to pass over the lower smoothing roller a on its way to the drying section at. Similarly, when it is again desired to mark the paper, the felt guide roller u is raised and the upper smoothing roller b is lowered until it rests on the roller a. The lever arm 7' is then hooked to the lateral arm h by the hook i if it is desired to increase the pressure of the upper roller b on the lower rollera.

The lateral adjustment of the upper roller b provided by the slidable journal member t and screw t2 makes it possible, when desired, to increase the amount of the surface of the rollers a and b covered by the paper web w in its passage and to increase the tension on the web. Thus if the upper roller 12 is moved to the left as shown by the broken line it is readily seen that the paper web w touches a greater portion of the circumferential surfaces of both rollers b and a.

As apparent, the use of my invention in changing from a marked or striped grade of paper to a plain grade of paper, or the reverse, practically eliminates the loss of time heretofore incurred when using the third press to do the marking, since with-that arrangement a complete change of felts was necessary. Also, due to the fact that the marking felt in my arrangement is above the paper web instead of beneath it, less moisture 1S absorbed by the felt, with the result that the felt is kept cleaner and lasts longer. Permitting more moisture to be retained in the paper web until the paper reaches the drying section further improves the quality of the marking. I have found that when the paper web has left the second or third press rolls it is in its very best condition for receiving the marking and with some paper it is preferable to omit the third press altogether. If the weight of the rubber roller alone is insufficient to exert the desired pressure, additional pressure is secured by the pull of the lever arm 1 thru the hook i on the rod g.

Of course should it be desired to use the rollers a and b as a smoothing press without the marking felt this can be done by taking roller b from its journal bearings, removing the marking felt and replacing the roller b.

I claim:

1. In a paper making machine, a paper marking assembly comprising a relatively soft surfaced top roll and a hard surfaced bottom roll, the top roll adapted to impose its weight on the bottom roll, a marking felt arranged to run on the top roll, the bottom roll carrying the paper web.

2. In a paper making machine, a paper marking assembly comprising a relatively soft surfaced top roll and a hard surfaced bottom roll, the top roll adapted to impose its weight on the bottom roll, a marking felt arranged to run on the top roll, the bottom roll carrying the paper web, means for relatively lifting said top roll from the bottom roll.

3. In a paper making machine, a paper marking assembly comprising a relatively soft surfaced top roll and a hard surfaced bottom roll, the top roll adapted to impose its weight on the bottom roll, a marking felt arranged to run on the top 'roll, the bottom roll carrying the paper web, means for relatively lifting said top roll from the bottom roll, and means for adjusting the pressure of the top roll on the bottom roll.

4. In a paper making machine, a paper marking assembly comprising a relatively soft surfaced top roll and a hard surfaced bottom roll, the top roll bearing on the bottom roll, a marking felt arranged to run on the top roll, the bottom roll carrying the paper web, means for relatively lifting said top roll from the bottom roll, and means for adjusting the pressure of the top roll on the bottom roll.

5. In a paper making machine, a paper marking assembly comprising a relatively soft surfaced top roll and a hard surfaced bottom roll, the top roll bearing on the bottom roll, a marking felt arranged to run on the top roll, the bottom roll carrying the paper web, means for relatively lifting said top roll from the bottom roll, and means tfor supporting the marking felt in inactive posiion.

6. In a paper making machine, a paper marking assembly comprising a relatively soft surfaced top roll and a hard surfaced bottom roll, the top roll bearing on the bottom roll, a marking felt arranged to run on the top roll, the bottom roll carrying the paper web, the vertical alinement of the axes of rotation of the said top and bottom rolls being adjustable to cause the marking felt to pass overmore surface on both rolls.

'7. In a paper making machine, a paper marking assembly comprising a frame, a hard surfaced bottom roll journaled in said frame, a vertically movable softer surfaced top roll bearing on said bottom roll, means for lifting said top roll from said bottom roll, means-for adjusting the pressure of the top roll on the bottom roll, and an endless driven marking felt inserted between said top and bottom rolls so as to run on said top roll. 8. The combination of claim 7 in which the top roll is supported by a pivoted vertically movable arm.

9. In a paper making machine, a paper mark-q ing assembly comprising a frame, a hard surfaced bottom roll journaled in said frame, a pivoted vertically movable arm, a journal slidably adjustable on said arm, a softer surfaced roll mounted in said journal bearing on said bottom roll, means for lifting said pivoted arm consisting of a rod connected to the free end of said pivoted arm, means for raising and lowering. said rod, and an endless driven marking felt inserted between said top and bottom rolls so as to run on said top roll.

10. In a paper making machine, a paper marking assembly comprising a frame, a hard surfaced bottom roll journaled in said frame, a pivoted vertically movable arm, a journal slidably adjustable on said arm, a softer surfaced roll mounted in said journal, bearing on said bottom roll, means for lifting said pivoted arm consisting of, a rod connected to the free end of said pivoted arm, a nut threaded on said rod, bearing on a supporting ledge of said frame, and an endless driven marking felt inserted between said top and bottom rolls so as to run on said top roll.

11. In a paper making machine, a paper marking assembly comprising a frame, a hard surfaced bottom roll journaled in said frame, a pivoted ver-- means for raising and lowering said rod, and

means for imposing additional weight on the top roll to increase its pressure on the bottom roll.

12. In a paper making machine, a paper marking assembly comprising a frame,- a hard surfaced bottom roll journaled in said frame, a pivoted vertically movable arm, a journal slidably adjustable on said arm, a softer surfaced roll mounted in said journal bearing on said bottom roll, means for lifting said pivoted arm consisting of a rod connected to the free end of said pivoted arm, means for raising and lowering said rod, means for increasing the pull of said rod and thereby the pressure of the top roll on the bottom roll, such means comprising a lever-arm pivoted on the frame and connected to said rod and a movable weight carried by said lever-arm.

13. The combination described by claim 7 including means for supporting the marking felt while in inactive position.

14. The combination of claim 7 including guide rolls carrying the marking felt, one of said guide rolls movable for supporting said felt in inactive position.

FRED H. CAREY.

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