US2217373A - Shaking fourdrinier mechanism - Google Patents

Description

Oct. 8, 1940. B. A. MALKIN SHAKING FOURDRINIER MECHANISM Filed Nov. 17, 1936 3 Sheets-Sheet 1 INVENTOR BERNARDAMALKIN ATTORNEY Oct. 8, 1940.

B. A. MALKlN SHAKING FOURDRINIER MECHANISM Filed Nov. 17, 1936 3 Sheets-Sheet 2 INVENTO E: BERNARD-AW!" ATTORNEY Oct. 8, 1940. B. A'. MALKIN SHAKING FOURDRINIER MECHANISM Filed Nov. 17, 1936 3 Sheets-Sheet 3 Patented Oct. 8, 1940 UNITED STATES v 2,217,373 SHAKING FO-URDRINIER MECHANISM Bernard A. Malkin, Lachine, Quebec, Canada, assignor to Dominion Engineering Works Limited,

Lachine, Quebec, Canada Application November 17, 1936, Serial No. 111,283

2 Claims.

This invention relates to Fourdrinier paper making machines and particularly to improved means for mounting and vibrating the table rolls provided at the wet end of such machines.

According to this invention the table rolls are vibrated by sliding them back and forth in stationary bearings mounted on the table roll section.' In the preferred embodiment of this invention the ends of each roll spindle are rotatably and slidably journalled in stationary bearings mounted on the stationary side frames of the table roll section. ,In this instance the roll spindles are detachably connected at one side of the machine to a vibrating bar which is actuated by a conventional shake drive mechanism so that the roll spindles are moved back and forth in their bearings. If desired certain selected rolls or groups of rolls may be detached from the vibrating bar and held against sliding movement by suitable means provided for this purpose. The mounting of the roll bearings on stationary frames permits said frames to be used as supports for stationary deckles or other accessories which have to be supported independ- 'ently when the frames are vibrated with the rolls according to conventional practice.

According to another embodiment of this invention the table roll spindles are journalled in front and rear bearings carried, respectively, by a stationary front frame and a movable rear frame, the arrangement being such that the roll spindles are slidable back and forth in the front bearings by imparting vibratory movement to the rear frame and the bearings mounted thereon.

Proceeding now to a more detailed description reference will be made to the accompanying drawings, in which- Fig. l is a plan view of a preferred embodiment of this invention as applied to the table roll section of a Fourdrinier paper making machine.

Fig. 2 is a sectional view taken substantially along the line 2--2 of Fig. 1.

Fig. 3 is an enlarged sectional view taken sub stantially along the line 3-3 of Fig. 2.

Fig. 4 is a view similar to Fig. 1 but showing a modified arrangement of the parts.

Fig. 5 is a detailed View illustrating the manner in which one or more selected rolls may be held against sliding movement when detached from the vibrating bar.

In the construction shown in Figs. 1 to 3 inclusive, the journals 5 and 6 of each table roll I are slidably and rotatably mounted in front and rear journal bearings 8 and 9 which, in turn,

are mounted on the front and rear stationary frame members Ill and II.

The journals 5, and 6 are slid back and forth in their respective bearings by means of a vibrating bar l2 to which the journal 6 is connect: 5

ed as generally indicated at I3. The bar I2 is supported from the frame II by flexible vertical supports It which may be made of woodor spring metal. Lugs -l2a carried by the rear side of the bar l2 are connected by links l5 to conventional shake drive mechanisms 16 which are mounted on a common base I! and are driven by a common motor l8 through the agency of shaft I9 and belt or chain drive 2|. When the motor I8 is inoperation the shake drive mechanisms 16' function to'reciprocate the links 15 and impart vibrating movement to the bar l2 with the result that the table rolls! are slid back and forth with respect to the stationary journal bearings 8 and 9.

As shown more particularly in Fig. 3, each of the journals 8 and 9 comprises a bearing housing 22 which is pivotally supported between the arms 23 of a vertically adjustable-bearing bracket 24 by means of the trunnions 25. and the bearings 26. The lower portion 21 of each bracket 24 is threaded onto a hollow stud 28 so that the bracket may be raised and lowered on said stud to adjust the height of the table rolls. Each stud 28 is preferably fixed to a base plate 29 which is slidably -mounted on one of the frame members l and II so that the bearings 8 and 9 may be adjusted to vary the spacing of the table rolls. In the present instance the base plate 29 of eachstud 28 is shown as provided with a downwardly facing channel 3] having an undercut side wall 32 engaging one side of a dove tail key 33 of the frame member, a suitable Wedge 34 being interposed between the remaining wall of the channel 3l and the opposite side of the key 33 to secure the base 29 in adjusted position. The journals and Bare supported in the housing 22 ,of-the bearings 8 and 9 by suitable anti-friction bearings 34, it being noted that the outer race 35 of each anti-friction bearing is contained in the housing 22 while the inner race 35a is mounted on the roll journal and is clamped in place between a shoulder 36 and a sleeve 31, the latter being slidable relative to the housing 22. The journal 6 of each table roll extends beyond the bearing 9 into a housing 39 which is fixed to the outer end of sleeve 31. The journal 5 is rotatably mounted in the housing 39 but is held against longitudinal movement relative to said housing by means of a conventional double thrust bearing M, the journal carried parts of which are confined between the outer end of sleeve 31 and a shoulder 42. Each housing 39 is provided with lugs 44 to which is detachably pivoted the forward end of a link 45 having its rear end pivoted to the vibrating bar I2 as indicated at 46. It will thus be seen that, during vibration of the bar I2, the housing 39 is slid back and forth and causes the journals 5 and 5 to slide in their respective bearings 8 and 9. i

As shown in Fig. 3 the vibrating bar I2 comprises upper and lower channels members I 21) and I2c which are held apart by spacers 41 and 48 to provide an intervening passage for the links 45 the rear ends of which are pivoted,'as indicated at 46, to brackets 49 carried by the rear spacer 48. The channel members I21) and I are clamped in place between the spacers 41 and 48 by means of the clamping bolts 50.

The vibrating bar I2 may be of relatively light construction since it is not called upon to carry any substantial weight but merely serves as a connecting bar through which longitudinal movement is impartedto the table rolls by the shake drive mechanisms IS. The bar I2 may be made in one continuous piece or may be made in sections jointed together andmounted so that different degrees of vibration may be imparted to the table rolls connected to the different sections. V

In practice it may be desirable to vibrate only certain selected rolls such, for example, as every alternate roll or every third roll, or a small group ofthree or four rolls in the centre of the table roll section. It is for this reason that the links 45 are detachably connected to the housing 39 so that any selected roll or group of rolls may be detached from the vibrating bar I2 and secured against sliding movement. In Fig. 5 I have shown one means whereby the rolls detached from the vibrating bar I2 may be held against longitudinal movement. As shown in this view the link 45 is omitted and the pivot 45a previously employed for fastening the link to the lugs 44 of the housing 39 is now utilized to fasten the lugs 44 to one end of a bracket 44a havingits other end detachably bolted to a stationary part of the'frame such, for example, as the guard 45b which overlies the bearings 9 and the housings 39.

In Fig. 4 I have shown a slight modification in which the front bearings 8 'of the table rolls are mounted on a-stationary front frame member I011, while the rear bearings. 9 are mounted on a movable frame Ila, the latter being mounted on flexible supports or in any'other way that will permit it to be moved back and forth to effect corresponding movement'of'the table rolls I. In this case the journals '5 are slidably and rotatably mounted in the bearings 8 but the journals 6 are rotatably supported in the bearings 9 so as to be held against independent longitudinal movement. In this modification the frame Ila is vibrated by one'or more of the shake drive mechanisms I6 through the medium of the link connections I5.

One advantage of the present invention is that a material reduction in the number and weight of the vibrating parts is effected as compared with the conventional practice of vibrating relatively heavy front andrear shake rails on which the table-roll bearings are mounted. In the preferred embodiment, as illustrated in Figs. 1 to 3 inclusive, it will be noted that vibration is imparted only to the table rolls themselves and to the relatively light vibrating bar I2. In the construction shown in Fig. 4, the reduction in the number and weight of the vibrating parts as compared with the conventional practice is realized by reason of the fact that the front frame and the front bearings of the rolls are permitted to remain stationary.

Another advantage of the preferred arrangement is that to obtain the desired results it may not be necessary to vibrate all the table rolls; selected rolls or a selected group of rolls may be vibrated, the remainder being held stationary, thus further reducing the Weight of the vibrating parts. A further advantage is that the device can be applied to existing machines with a minimum of structural alterations.

Having thus described my invention, what I claim is:

1-. A Fourdrinier paper making machine comprising table rolls provided With-front and rear stationary bearings in which the journals of each roll are slidably and rotatably mounted, a laterally movable bar arranged at one side of said machine, a plurality of links extending transversely of said bar so that the opposite ends of each link project beyond opposite sides of the bar, means pivotally connecting one end of each link to the adjacent side of said bar and means coupling the remaining 'end of each link to a journal of one of said rolls so that said journal is free to turn relative to said link and coupling means but is held against independent longitudinal movement.

2. A Fourdrinier paper making machine comprising table rolls provided with front and rear stationary bearings in which the journals of each roll are slidably and rotatably mounted, a coupling housing fitted on one journal of each roll so that said journal is free to rotate in said housing but is held against longitudinal movement relative thereto, a laterally movable bar mounted on flexible supports at one side of said machine, said bar comprising upper and lower members held apart by interposed spacers, a plurality of links extending transversely through the space between the upper and lower members of said bar, each link having one end pivoted to one of said coupling housings and the other end pivoted to said bar at the side of the-bar remote from said coupling housings and means for imparting lateral movement to said bar.

BERNARD A. MALKIN.

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