US1969140A - Paper machinery - Google Patents

Description

Aug. 7, 1934. H. L. KUTTER PAPER MACHINERY Filed April 19, 1935 Patented Aug. 7, 1934 UNITED STAT 1,969,140 PAPER, MACHINERY Herman L. Kuttr, Hamilton Ohio assig iiorpto The Black-Clawson Co a corporation'of Ohio mp ny, Hamilton, o,

Application April 19,1933, Serial No. 666,876 6 Claims. (01. 92-49) This invention relates to paper machinery and more particularly to paper machinery employing upper and lower rolls arranged for pressure action on an endless web passing through the nip of the T0115.

One object of the invention is the provision of a simple and effective means for raising the upper rollof an apparatus of the character mentioned out of engagement with the lower roll, the con- 0 struction employing an adjustable connection between a plurality of raising elements one of which is operated by the direct action of a cam or the like. I

Another object of the invention is the provision of a raising means for the upper roll of a cylinder mold apparatus, employing a plurality of adjustably interconnected levers one of which movably carries a bearing block for the upper roll, the construction providing for adjustment of the bearing block while maintaining the force receiving end of theroll lifting device at some normal predetermined position.

Further objects and advantages of the invention will be apparent from the following description, the appended claims, and the accompanying drawing, in which- Fig. 1 is a side elevation of a cylinder mold apparatus having a roll lift embodying the present invention; 1

Fig. 2 is a side elevation on a smaller scale showing the roll lift applied to the primary suction rolls of a paper making machine;

Fig. 3 is a top plan view of a portion of the device shown in Fig. 1.

Fig. 4 is a detail view of the bearing carrying lever;

Fig. 5 is an end view of the same; and Fig. 6 is an end view of the lever operating arm. Referring more particularly to the drawing by reference numerals, 10 designates generally the vat, and 11 and 12 respectively designate the lower or cylinder mold roll and the upper or couch roll of a paper making machine. In a device of .this sort the top roll is usuallya rubber covered roll which presses with considerable force against the cylinder mold by reason of its own weightand additional gravity means such as the weight 13, weight applying arm 14, and. link 15. In accordance with the present invention. duringshutdown periods and also at times when itis necessary to remove and replace a felt which operates through the nip of the rolls the upper or couch roll 12 may be quickly and easily lifted ofi from the cylinder mold so that the rubber covering will be relieved of all weight that would otherwise be applied in one position for a considerable length "of time. This lifting device as will be more fully set forth in detail, is of such character that the axis of the upper roll may assume various operating positions with respect to the lower roll axis, the-position of the upperroll axis changing, for. example, as the point of contact or tangencybf the two rolls is moved up ordown, or- .wheno'ne of the rolls is replaced by another roll rnachena of the roll .12 is journalled in a bearing block 16, each of which is adjustably supported by a pivoted supporting lever 1'7 having a fulcrumaxis 18'on a fixed standard 19 adjacent'the roll. The upper portion of each i'" bearing. block is made in the 'form of a shoe which is, adaptedto slide in. a track 28 formed by flanges 20" projecting inwardly from the opposite side'sof, the lever as shown in Fig; 5. Suitable holding screws 21 lock the shoe in any desiredposition of adjustment on the lever 17. As'shown in Fig; 1, the point of engagement of thetwo rolls is indicated at 22. However, if it is desired-that the point of contact be changed, or brought. to the point 23 for example, the bearing block may be moved outwardly or to theright as shown in Fig. 1, which will have the effect of lowering the axis of the roll 12 and of course'jwill also have the further effect of tiltingthelever 17.

' The fulcrum 'end of the lever 17 is bifurcated I as shown in Fig. 4, the two end legs 24 being .rotatably supported on a carrying pin which also preferably forms the fulcrum point of the operating arm or lever 25. This arm 25 extends generally transversely with respect to the lever 17 in theembodiment of the invention herein illustrated. The arm 25 has a projectinglug 26 provided at a suitable distance from the fulcrum poin'tjof the parts 1'7 and 25. An adjusting screw or stop is adjustably provided in one of these parts, and bears against the other part so tha't as the arm 25, for example,,is moved counterclockwise from its normalposition shown in Fig. 1, the.arm 17 will be cor're 'spondingly'moved in order that the weight of the roll 12 maybe relieved from thelower roll. As herein shown the adjustable connection between the two parts 17 and 25 comprises abolt 25 counterclockwise when it is desired that the roll 12 be raised. The operating means preferably comprises a cam 29 secured to the rotatable shaft 30, the shaft having a long handle 31 or other suitable operating means which permits it to be rotated manually. One portion of the cam 29 is fiat as indicated at 32 and when this fiat portion is brought into engagement with the straight portion 33 of the arm 25, the latter will be held in raised position without other locking means being required.

It will now be understood that regardless of the position of the bearing block or shoe .on the lever 17, the adjusting screw 2'7 may be so set that the arm 25 assumes its normal position, as shown in Fig. 1, withthe end of the screw 27 bearing against the lug on the arm. In this normal position the lower end of the arm is adapted to be moved counterclockwise as soon as the cam 29 is rotated so that the upper roll can be quickly and conveniently moved up away from the lower roll. This saves the rubber orv other surface of the roll and prevents it from being corrugated or damaged during shut-down periods.

It should also be understood that the invention as herein set forth is not limited to a cylindermold type of apparatus, as the upper roll of raised in the same manner.

rimary suction rolls, for example, may be centric cam operated on a part that was immovably fixed with respect to the lever 17. However, with the adjustable interconnection between levers 25 and 17 the full throw of the lifting means may be obtained and this lifting means may be made a very simple device which is effective not only for intentional adjustments of position of the upper roll bearing block, but

is also effective when the couch roll is replaced by another of larger or smaller diameter, or when the rubber wears down considerably, either of which have the effect of raising or lowering the center of the top roll.

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of .appara-tus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. In paper making apparatus of the character described, cooperating upper and lower rolls, a bearing block for said upper roll, a pivotally mounted lever on'which said bearing block is said lower roll.

, 2. In paper making apparatus of the character described, cooperating upper and lower rolls, a I

bearing block for saidupper roll, a pivotally mounted lever on which said bearingblock is ad'- I,

Fig. 2 shows the same construction of quick-lift apparatus as apjustably mounted, a second pivotally supported lever, a screw adjustably threaded in one of said levers and forming an abutment for the other of said levers so as to provide an adjustable connection between said levers to maintain a predetermined normal position of said second lever when the bearing block is adjusted to different positions on said firstlever, and a rotatable member having an eccentric-surface engageable with said second-lever for moving the same from its predetermined normal position to raise said upper roll away from said lower roll.

3. In-paper making apparatus of the character described, oooperating upper and lower rolls, a bearing block for said upper roll, a pivotally mounted lever on which said bearing block is adjustably mounted, a second lever, said levers having a common fulcrum axis, an adjustable stop on one of said levers adapted for engagement with the other of said levers at a distance from the fulcrum axis to maintain a predetermined normal position of said second lever when said bearing block is adjusted to different positions on said first lever, and'a rotatable thrust means for moving said'second lever from its predetermined normal position to raisesaid upper roll way from said lower roll. I

4. In paper making apparatus or" the character described, cooperating upper and lower rolls, a

bearing; block for said upper roll, a pivotally mounted lever on which said bearing block is adjustably mounted, a second levensaid levers having a common fulcrum axis and extendinggenerally transversely with respect to one another,

and an adjustable screw carried by one of said levers and adapted for engagement with the other of said levers at a distance from the fulcrum axis to maintain a predetermined normal position of said second lever when said bearing block is adjusted to difierent positions on said first lever,

and a rotatable thrust. means for moving said second lever from its predetermined normal position to raise said upper roll away from said lower 1011. V V

5. In a cylindenmold: machine for making paa) per, a cylinder mold roll anda couch roll cooperating therewith, abearing block for said couch roll, a pivotally mounted lever on which said bearing block is mounted, a second pivotally mounted lever, an adjustable stop between said levers providing an adjustable connection for maintaining a predetermined normal position of said second lever for-various positions of said first lever, and rotatable thrust means for moving said second lever its predetermined normal position to raise the couch roll away from said cylinder mold roll.

, 6, In paper making apparatus of the character described, cooperating upper and lower rolls, a bearing block for. said upper roll, a pivotally mounted lever on which said bearing block is adjustably mounteda lever operating arm, .an adjustable connection between said lever andarm for maintaininga predetermined normal position of said arm' when the bearing block is adjusted to. different positions on'said lever, and moving i I HERMANL. KUTTER.

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