US2442673A - Device for watermarking paper - Google Patents

Description

H. P. BAILEY ETAL DEVICE FOR WATERMARKING PAPER June 1, 1948.

2 Sheets-Sheet 1 Filed July 24, 1946 m Q M w MN w I. 4| I L." .W/ MN \m w. m mm INVENTORS #maaw I? 80/1. :Yv G'EUPGE S. 7W1. o?

.rLi

lzwzzf RGENT June 1948. H. P. BAILEY ETAL 2,442,673

DEVICE FOR WATERNARKING PAPER Filed July 24, 1946 2 Sheets-Sheet 2 F [,1 I h l x n 0 E I If? 4 w h:

4D 9 Q L l INVENTORS #019040 R Bauer 650190: .9. have noewr Patented June 1, 1948 DEVICE FOR WATERMARKING PAPER Harold P. Bailey and George S. Taylor, Niagara Falls, N. Y., asslgnors to International Paper Company, New York, N. Y., a corporation of New York Application July 24, 1940, Serial No. 685,795

Claims. (CI. 92-48) This invention relates to new and useful improvements for watermarking devices usable in the manufacture paper and particularly seeks to provide a novel mounting means for individually mounted watermarking'wheels.

In the manufacture of paper most watermarking is efiected adjacent the wet end of the papermaking machine prior to the time at which the paper web is introduced into the drier section. It has been found in the past that watermarkin of a wet web of paper may be effected as through the use of transversely disposed rotating rolls engageable with the web at a suitable station within the machine and which rolls are provided with suitably positioned resilient impressionforming devices. It is also known to effect the watermarking of a wet web of paper through the use oi a plurality of individually mounted watermarking wheels suitably positioned adjacent a rotating roll such as a press roll in the papermaking machine, each of which carries appropriately formed resilient impressing media. The present invention relates to the latter type of watermarking devices. It will be appreciated that when a plurality of individual watermarking wheels are employed it is essential to provide mounting means therefor which are adjustable about all three major coordinate axes in order to provide for proper contact of the impressing surface of each wheel with the associated wet web of paper. 4

It is therefore an object of this invention to provide novel mounting devices for watermarking wheels which are carried by a transverselydisposed bar or shaft rigidly secured to the stationary framework of a papcrmaking machine. These mounting devices include means for yieldably biasing the watermarking wheel towards the paper web with which it is associated, means for minutely adjusting the face to face contact relationship between the watermarking wheel and the associated web of paper, and means for laterally adjusting the position of the watermarking wheel in order that the plane of rotation thereof may be aligned exactly with the path of travel of the paper web.

Another object of this invention is to provide a device of the character stated in which the mounting means include a pair of relatively rotatable sleeves, one of which is rigid-1y afllxed to a transversely-disposed, rigidly secured shaft. and the other of which is freely carried by said shaft in a position adjacent the fixed sleeve.

Another object of this invention is to provide a device of the character stated in which the relatively rotatable sleeve carried by the transverse shaft is provided with an adjustably securedwatermarking. wheel assembly in which pivotal means are provided for adjusting the water; marking wheel about an axis normal to the axis of the transversely disposed shaft, and in which other means are provided for rotatably adjusting the watermarking wheel about an axis substantially at right angles to said normal axis.

Another object of this invention is to provide a device of the character stated in which the watermarking wheel assembly may be readily removed from. its associated mounting sleeve without necessitating the removal of this sleeve from the papermaking machine.

Another object of this invention is to provide a device of the character stated which is simple in design, rugged in construction and which may be minutely and accurately adjusted.

With these and other objects in view, the nature of which will become more apparent, the invention will be more fully understood by reference to the drawings, the accompanying de-' tailed description and the appended claims.

In the drawings:

Fig. 1 is a side elevation of a watermarking wheel and its mounting means constructed in accordance with this invention, the rigid, transversely disposed mounting shaft being shown in section, and a press or other roll of the papermaking machine being diagrammatically indicated in solid line with the web of wet paper carried thereby being indicated in dotted line;

Fig. 2 is a front elevation thereof;

Fig. 3 is a top plan view thereof Fig. 4 is a broken horizontal section taken along the line 4-4 of Fig. l; and

Fig. 5 is a vertical section. taken along the line 5-5 of Fig- 1.

Referring to the drawings in detail, it. will be seen that the device in which this invention is embodied is mounted upon a transversely disposed shaft 5 able portion of the frame of a papermaking machine. It will be appreciated that the mounting shaft 5 is suitably disposed with respect to one of the rolls of the paper machine, generally indicated at B, which may be a press roll and I which carries therearound the web of paper genorally indicated at 'I in dotted lines in Fig. 1 of the drawings. Foreach watermarking wheel to be employed in any given installation the shaft 5 carries a split ring 8 which is securely clamped thereon, as through the use of clamping lugs and bolts generally indicated at 9. The split ring 8' is also provided with a radially projecting lug l0 having an overhanging portion II which overwhich is rigidly secured to a suit-- lies a sleeve or collar l2 freely carried upon the mounting shaft 3. The overhanging portion ll of the lug I is equal in length to the width oi the collar l2 and is provided at its end with a retaining plate l3, secured thereto as by screws H, which serves to prevent any axial movement oi the collar l2.

The collar I2 is provided with aradially projecting lug I! which is provided with a suitable aperture to permit the passage of one endoi an arcuately shaped guide rod IS, the other end of which passes through a'suitable aperture formed vided to secure the set screws 4| in their adjusted in the overhanging portion II or the lug ID. The

guide rod l8 carries thereon a helical compression spring H, the opposite .ends or which are engaged with the opposed faces of the lug extension and the lug l5. One end of the guide rod l3 is provided with a head l8 and the other end is threaded for threadable engagement with an adjusting and retaining nut It. The compressive force of the spring I! will constantly tend to urge the lu s l5 and II apart, and due to the fact that these lugs are rigidly secured to the respective split ring 3 and collar l2 there will be a tendency for the collar l2 to rotate with respect to the split ring 8.

The collar I2 is also provided with a boss having formed thereon a cylindrical stud 2| of reduced diameter which is provided adjacent its outer end with an annular retaining groove 22, the purpose of which will hereinafter be more fully described.

A block 23 is pivotally carried by the stud 2| and is retained against disengagement therefrom as by a set screw 24 having an end portion of reduced diameter receivable into the groove 22 oi the stud. A suitable lock nut 25 may be provided to prevent accidental disengagement or the set screw from the groove. The block 23 is bored at right angles to the axis of the stud 2| upon which it is pivotally carried to provide for the rotatable mounting of a depending arm 28 which carries at its lower end a freely rotatable watermarking wheel 21 having a suitable resilient impression-iorming face 28. The upper end 01' the arm 26 is provided with an upstanding stud 29 having a diameter substantially equal to the diameter of the bore in the block 23. The stud 23 contains an upper end portion 30 of reduced diameter which is adapted to receive a worm gear 3| which is rigidly aflix'ed thereto against rotation as by the usual key and keyway arrangement 32. A spacing and clamping collar 33 is positioned above the worm gear 3| and is retained against displacement by a nut 34 th'readably engaged with the extreme end portion of the stud end 30; It will be appreciated that the nut 34 serves to maintain the depending arm 26 in rotatable engagement within the block 23. The outer portion of the block 23 is provided with a pair of spaced parallel bearing lugs 35. A worm 33 mounted on a shaft 31 having a square end extension 38 is rotatably carried by the lugs 35 and is engageable with the worm gear 3| secured to the stud portion 30 or the arm 26. It will thus be apparent that rotation of the worm 38 will cause a corresponding rotation 01 the worm gear II to rotate the arm 26 and its associated marking wheel 21 about the axis of the stud 28.

In view of the fact that theblock 23 is pivotally carried by the stud 2| means are provided for not only limiting the pivotal movement 01 the block and its dependably carried arm 26, but to provide for angular adjustments or the block 23 with respect to its carrying collar 12 positions.

- In the proper use or watermarking wheels it is essential to accurately adjust the relative position oi a watermarking wheel with respect to whatever machine roll it is associated in order that the impression-forming face of the watermarking wheel may be accurately maintained in parallel relationship with the machine roll, in order that a proper amount of impression-torming pressure may be accurately maintained between the watermarking wheel and its associated roll, and in order that the plane 01' rotation of the watermarking wheel be maintained parallel with the linear path 01' travel 01' the wet paper web upon which the watermarks are to me impressed. This invention is embodied in a device which contains means for arriving at all oi the aforementioned adJustments and for maintaining the same after they have been secured. Thus the parallel face to face contact between the resilient impression-forming surface 28 or the watermarking wheel and the machine roll 6 which carries the paper web I is regulated through the use or the worm and worm gear connections 38 and'3l which rotate the wheel-mounting arm 28 about the axis 01 the mounting stud portion 29 thereof to the positions somewhat diagrammatically indicated by the dot and dash lines shown in Fig. 3 of the drawings. The amount of pressure contact between the impression-forming surface of the watermarking wheel and the machine roll 6 is determined by proper adjustment of the retaining nut l9 on the guide rod l6 which varies the effective pressure that the helical compression spring ll can exert to cause relative movement of the collar l2 and all of its associated and dependably carried elements. It will be appreciated that the strength of the spring I! is selected so that it the nut H! were backed of! all of the way the spring would cause the exertion of maximum permissible pressure of the watermarking wheel against the associated machine roll. If this pressure is to be decreased it is only necessary to slightly tighten the retaining nut l9 on theguide rod l8 and correspondingly, if it is desired to move the watermarking wheel out of contact with the paper web carried by the machine roll 8 it is only necessary to fur ther tighten the nut 9. The tracking of the watermarking wheel 21 with respect to the linear path of travel of the paper web is adjusted through the use of the screws 4| which act against the lug 39 on the collar l2 to.anguiarly adjust the block 23 with respect to, its mounting stud 2|. The last mentioned adjustment is somewhat diagrammatically indicated by the dot and dash lines in Fig. 2 oi the drawings and is actually effected by tightening one of the screws while loosening the other. After the proper adjustment has been achieved, 0! course, both of the screws 4| are secured in the adjusted position as by the .lock nuts 42.

In the normal operation 01' a paper mill which produces watermarked paper it is frequently necessary to change watermarks in accordance with customers requirements. Therefore, it is essen- Tothisendthe' tial that the watermarking devices may be readily applied to or removed from the machine with which they are associated. In the case of the instant invention the removal of the watermarking wheel from its operative position in papermaking machine is quickly and simply effected by removing the set screw 26 from the block 23 which permits the block 23 together with its associated, dependably-mounted arm 26 and watermarking wheel 21 to be removed from the stud 2|. After this assembly is removed the watermarking wheel per se may be readily removed from its carrying arm 26 and replaced by another one.

Thus it will be seen that the herein disclosed invention provides a novel means for the mounting of watermarking wheels which includes adjusting means for accurately positioning the watermarking wheel with respect to the paper web upon which the watermarks are to be formed.

It is, of course, to be understood that various details of arrangements and proportions of parts may be modified within the scope of the appended claims.

We claim:

1. In a watermarking device for a papermaking machine wherein is provided a stationary transversely-disposed frame element of circular crosssection situated at the watermarking station of such machine, a stationary member rigidly secured on said frame element, a second member movably carried by said frame element, resilient biasing means connecting said stationary and movable members for causing relative rotation of said movable member with respect to said stationary member about the axis of said frame element thereby to urge a watermarking wheel into contact with a moving web of paper, a block pivotally carried by said movable member, the axis of pivot of said block being substantially at right angles to the axis of motion of said movable member, a depending arm rotatably carried by said block, the axis of rotation of said arm being substantially at right angles to the axis of pivot of said block, and a watermarking wheel rotatably carried by the lower end of said depending arm.

2. In a watermarking device for a papermaking machine wherein is provided a stationary transversely-disposed frame element of circular crosssection situated at the watermarking station of such machine, a stationary member rigidly secured on said frame element, a second member movably carried by said frame element, resilient biasing means. connecting said stationary and movable members for causing relative rotation of said movable member with respect to said stationary member about the axis of said frame element thereby to urge a watermarking wheel into contact with a moving web of paper, a block pivotally carried by said movable member, the axis of pivot of said block being substantially at right angles to the axis of motion of said movable member, means for adjusting the angular position of said block about its axis of pivot with respect to said movable member, a depending arm rotatably carried by said block, the axis of rotation of said arm being substantially at right angles to the axis of pivot of said block, means for adjusting the angular position of said depending am about its axis of rotation with respect to said block, and a watermarking wheel rotatably carried by the lower end of said depending arm.

3. In a watermarking device of the character described a stationary collar, a movable collar associated with said stationery collar, resilient biasing means connecting said stationary and movable collars and effective to cause relative rotary movement therebetween about a generally horizontal axis, a stud on said movable collar disposed at right angles to the axis of movement thereof, a, block pivotally mounted on said stud, means for retaining said block on said stud, means for adjusting the angular position of said block with respect to said movable collar about the axis of said stud, said block being provided with a, bore having its axis disposed at right angles to the axis of said stud, a depending arm rotatably secured in the bore of said block, means for adjusting the angular position of said depending arm with respect to said block about the axis of said bore, and a watermarking wheel rotatably secured to the lower end of said depending arm.

4. In a watermarking device of the character described a stationary collar, a movable collar associated with said stationary collar, resilient biasing means connecting said stationary and movable collars and effective to cause relative rotary movement therebetween about a generally horizontal axis, means for limiting the amount of relative movement between said sleeves, a, stud on said movable collar disposed at right angles to the axis of movement thereof, a block pivotally mounted on said stud, means for retaining said block on said stud, means for adjusting the angular position of said block with respect to said movable collar about the axis oi said stud, said block being provided with a bore having its axis disposed at right angles to the axis of said stud, a depending arm rotatably secured in the bore of said block, means for adjusting the angular position of said depending arm with respect to said block about the axis of said bore, and a watermarking wheel rotatably secured to the lower end of said depending arm.

5. In a watermarking device of the character described a stationary collar, a movable collar associated with said stationary collar, resilient biasing means connecting said stationary and movable collars and effective to cause relative rotary movement therebetween about a generally horizontal axis, a stud on said movable collar disposed at right angles to the axis of movement thereof. a block pivotally mounted on said stud, means for adjusting the angular position of said block with respect to said movable collar about the axis of said stud, said block being provided with a bore having its axis disposed at right angles to the axis of said stud, 8. depending arm rotatablysecured in the bore of said block, means for adjusting the angular position of said depending arm with respect to said block about the axis of said bore, a watermarking wheel rotatably secured to the lower end of said depending arm, and disconnectable means for retaining said block pivotally on said stud whereby upon the disconnection of said means said block together with its said depending arm and associated watermarking wheel may be readily removed.

HAROLD P. BAILEY. GEORGE S. TAYLOR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS i Number Name Date Re. 12,218 Behrend et al. May 10, 1904 1,530,677 Klund et a1. Mar. 24, 1925

Images