US1818719A - Paper making machinery - Google Patents

Description

Aug. 11, 1931. H. L. KUTTER PAPER MAKING MACHINERY Filed Dec. 10, 1928 O n I a I )A'VENTOR Wm .M

A TTORNE VJ Patented Aug. 11, 1931 UNITED STATES PATENT OFFICE HERMAN L. K'l'I'J-"IIEB. OF HAMILTON, OHIO, ASSIGNOB TO THE BLACK-CLA'WSON OOK-' PANY, OF HAMILTON, OHIO, A CORPORATION 01 OHIO PAPER MAKING MACHINERY Application filed December 10, 1928. Serial No. 325,037.

This invention relates to paper making machinery or the like, and more particularly to machinery of this character having cooperating rolls between which passes a paper web or the like in the formation of a web or sheet of paper from paper stock.

The main object of this invention is the provision of a aper making machine or the like, of this 0 aracter, having a roll supported on an adjustable frame which 1s hydraulically moved to move the roll out of engagement with the other roll with which it cooperates.

Other objects and advantages of the invention will be apparent from the followmg description and from theacompanymg drawin s in which ig. 1 is a side elevation of a port1on of a paper making machine embod mg the pres ent invention, part of the rame portion thereof being shown in section; and

Fig. 2 is a horizontal section on the lme 2-2 of Fig. 1.

In paper makin' machinery used in the a formation of a we or sheet of paper from paper stock, cooperating rolls such as press rolls and the like are employed, between which the web, or the web together with a carrying felt, is fed. In a paper press, the form in which the invention is herein disclosed, the paper web is carried by an endless felt between the upper press roll and the lower press roll, between which considerable pressure is exerted on the web and felt to remove some of the water content from the web. These press rolls are often of lar e size and considerable weight. In paper ma ing machines as heretofore constructed the upper press roll has been raised to permit the replacement or changing of a felt, largely by the use of muscle and brawn. In the operation of presses for exam Ie, the removal of the soft surfaced roll 0 the ress'from the press is frequently required or the regrinding of the surface of the roll. The bottom roll of the press is usually the soft surfaced roll, bein faced with. rubber or the like, and this r0 1 may be removed from the press in some cases at intervals as fre uent as every thirty days. Before its remova can be effected the upper roll must be lifted out of pressure engagement with the lower roll to acilitate the removal of the latter. Over week-end shut downs the top press rolls should be raised to prevent m'ury to the rolls. This has been accomplishe in the past by the use of hand ratchets or worm ears which are slow and require the time 0 two men on each roll, one at each end of the machine, and the total time and manual labor required for this operation is a very considerable item. Furthermore, care must be exercised that bothends of the roll are raised evenly, since if one end of a roll is lifted higher than the other end the load will rest unevenly on the bearings and subject them to undue strain. Also the doctor which cooperates with the upper roll sometimes becomes warped enough permanently to change its shape, thereby endangering it beyond repair. This crude way of raising a press roll is entirely done away with in accordance with the present inventlon, wherein the adjustable roll is evenly and quickly moved out of engagement with the other roll by hydraulic pressure means. The creation of sufiicient hydraulic pressure to move the adjustable roll is accomplished quickly and without undue exertion, and thus one man can do in a few seconds a job that has always required several minutes of hard manuallabor.

In the drawings this invention is illustrated as applied to the press rolls of a paper making machine or the like, the embodiment shown relating to a paper ress in which the upper roll is ad'ustably positioned, but it is to be understood t at the invention is applicable to other rolls in the paper making art. The press embodies a stationary main frame 10 in which is rotatably mounted the lower press roll 11, this roll being of considerable length transversely of the machine, and being positioned below the upper press roll 12 which is rotatably carried in suitable end bearings 13 on an adjustable frame 14. The adjustable frame 14 ma carry the doctor 15 usually employed with t e top press roll, and is also shown as providinga support for a broke conveyor 18 and its 0 crating mechanism. Preferably the doctor is adapted to be reeach side of the adjustab ciprocated endwise in the usual manner, the operating dev ces for the doctor being also carried by the adjustable frame.

The adjustable frame 14 is pivotally mounted at its opposite sides in bearings 20 provided adjacent upper parts of the two spaced standard portions 21 of the fixed frame 10. Preferably these standard portions are hollow castings which receive the downwardly extending arms 22 of the adjustable frame 14, one of these arms being provided adjacent e frame.

On each side portion of the main frame 10 is a cylinder 24 within which is a movable iston 25 having a connecting rod 26 the en 27 of which engages in a notch 28 or the like provided at the lower end of arm 22 of the adjustable frame. A drain valve 30 is preferably provided adjacent the inner ends of each of these cylinders, and the other ends of the cylinders are connected by pipes 31 to a pressure generating apparatus 33, shown in the form of a hand pump. The pump is provided with a handle 34 which may be manually operated to create a pressure in the fluid system, which is filled with oil or other suitable liquid so that the pistons 25 may be operated by hydraulic pressure. When fluid pressure is supplied to the cylinders, the pistons are forced to the left, see Fig. 1, and this action moves the downwardly extending arms 22 of the adjustable frame in such a manner as to raise the upper roll 12 away from the lower roll. When the uper roll is so raised, it will be apparent that the replacement of the felt which passes through the nip of the two rolls can be easily effected, or the upper roll may be raised in case of shut down or to permit the removal of the lower roll from the machine. The pressure in the system may be caused to slowly fall when the valve 32, which by-passes the hand pump, is opened to permit the return of the fluid to the liquid supply.

As both cylinders, located on opposite sides of the machine, are supplied with exactly the same hydraulic pressure when the adjustable frame is moved to raise the roll 12, it will be apparent that there will be no likelihood of endangering the bearings, doctor, or any other parts of the press, and it will be aparent that the raising of the upper roll can be accomplished in a very short time, and by a single operator, and without much physical exertion. Where a number of pairs of rolls are used in a paper making machine all of the upper rolls may be raised at the same time with the greatest case when' the hydraulic raising means of the various rolls are interconnected so that they all receive the same fluid pressure from the hydraulic system.

-When the desired height of the roll 12 is reached, a mechanical lock operates to hold the roll in that position. Preferably this look comprises an arm 36 pivotally mounted on one of the'adjacent parts of the frame for example, on the fixed frame standard 21, the arm being adapted to be operated by a lever 37 so that the end of the arm may be swun down into a position engaging the side of the arm 22 of theadjustable frame. Such movement of the holding arm 36 iseflected by a counter-clockwise movement of about 90 from the position shown in Fig. 1. When the arm 36 is in holding position, the pressure exerted on the arm by the portion 22 of the adjustable frame is in the direction of the axis of the shaft on which the holding arm is mounted, so that a simple yet strong construction is provided. The upper roll may thus be held in its raised position without necessitating the maintenance of the fluid pressure in the hydraulic system. When the upper roll is to e lowered again into cooperative pressure relation with the lower roll the hydraulic system is again employed to raise the pressure effective on the pistons so that the Weight of the adjustable frame is relieved from the holding arm 36, and the latter may then be moved back to ineffective position as shown in Fig. 1. The fluid pressure may then be relieved in the hydraulic system by opening the relief valve 32, and as the pressure slowly falls, the adjustable frame is slowly returned to its normal effective position.

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 apparatus, and that changes may be made therein Without departin from the scope of the invention which is de ned in the appended claims.

What is claimed is:

1. In a paper making machine of the class described, an adjustable roll, a second roll normally cooperating therewith, a main frame comprising opposite hollow frame side portions, and an "adjustable frame having arms extending down into said side portions and pivoted on said main frame and supporting said adjustable roll above said second roll, the adjustable roll being held merely by the action of gravity against the second roll and a fluid pressure system for moving said adjustable frame upwardly away from said second roll, said fluid pressure system comprising a piston and cylinder for each of said arms, a manually operated fluid pressure generator, and a connection therefrom to but one end of each of said cylinders to supply equal pressure 'simultaneously to the two cylinders for raising lpoth sides of the adjustable frame with equal orce.

2. In a paper making machine of the class described, an upper roll, a lower roll normally cooperating therewith, a main frame, an adjustable frame pivoted on said main frame and supporting said upper roll in cooperative relation with said lower roll, the upper roll being held by the action of gravity against the lower roll, pistons and cylinders at opposite .sides of said main frame for movlng said adjustable frame to a position in which said upper roll is spaced away from said lower roll, means for supplying fluid simultaneously under equal pressure to said 0 linders, and mechanical means adapted to interposed in the path of an angularly movable portion of the adjustable frame for holding said adjustable frame insaid position.

3. In a paper making machine of the class described, an upper press roll, a lower press roll cooperating therewith, a main frame supporting said lower press roll, an adjustab e frame pivoted on said main frame at opposite sides thereof and normall supporting said upper press roll in effective position upon said lower press roll, the upper roll bemg held merely by the action of gravity against the lower roll, a lurality of simultaneously actuated hydraullc pressure means for moving said adjustable frame to a position in which said upper press roll is removed from said lower press roll, and a pivotally supported stop means for holding saidadjustable frame in said position. 0

4. In a paper making machine of the'class described, an upper press roll, an adjustable frame rotatably supporting said upper press roll, a lower press roll adapted to cooperate with said upper press roll, a main frame on which said adjustable frame is pivoted, said main and adjustable frames having portions extending in the same general direction, a fluid pressure system for moving said adjustable frame to a position in which said upper press roll is spaced from said lower press roll, and a manually operable holdin bar pivoted on one of said portions an adapted to be moved to holding position in effective engagement with the other portion for holding the upper press roll above said lower press roll.

5. In a paper making machine of the class described, an upper press roll, an adjustable frame rotatably supporting said upper press roll and having a downwardly extending arm on each side thereof, a lower press roll' adapted to cooperate with said upper press roll, the up er roll being held merely b the action 0 gravity against the lower rol a main frame pivotally supporting said adjustable frame at opposite sides thereof and havin standard portions adjacent the arms of sai ad'ustable frame, a pressure cylinder in each 0 said standard portions, a piston operating in each of said cylinders means interconnecting said pistons and said downwardly extending arms, and means for simultaneously supplying fluid under equal pressure to only one side of each of said pistons for moving opposite sides of said adjustsignature.

HERMAN L. KUTTER.

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