US1303493A - milne - Google Patents

Description

Patented May 16, 1919 Jm/mlar- Mme/772%? W 0 mm n ml s. MILNE. I FOURDRINIER PAPER MAKING MACHINE.

APPLICATION FILED JAN. 3. I919.

S. MILNE. FOURDRINIER PAPER MAKING MACHINE.

APPLICATION FILED JAN. 3. 1919.

Patented May 13, 1919.

4 SHEETS-SHEET 2- S. MILNE. FOUHDRINIER PAPER MAKING MACHINE. APPLICATlON FILED JAN 3. I919.

133,493. Patented May13, 1919.

4 SHEETS-SHEET 3.

S. IVIILNE.

FOURDRINIER PAPER MAKING MACHINE. APPLICATION FILED IAN. 3. I919 3,493 I 71 w Patented May 13,1919.

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| 1 I I l I I I Tim ii C III 4 H4 I.

SAMUEL MILNE, 0F EDINBURGH, SCOTLAND.

FOURDRINIER PAPER-MAKING MACHINE.

Application filed January 3, 1919.

To all whom it may concern:

Be it known that T, SAMUEL MILNE, a subject of the King of Great Britain and Ireland, and resident of Edinburgh, Scotland, have invented certain new and useful Tmprovements in Fourdrinier Paper-Making Machines, of which the following is a specification.

This invention refers to 'Fourdrinier paper making machines and relates to the wet end or wire part of such machines. In order to increase the output of such ma chines it is customary to increase the speed and/or to increase the size (length and width) of the wire. While increasing the output by increasing the speed or size of wire it does not follow that the quality of the paper is maintained, on the contrary, the quality is not usually so good as that obtained in a slower running or smaller machine. creasing the speed and/or size of the wire it is not possible with the machines as at present constructed to increase the speed of vibration of the wire, technically known as the shake, in anything like the same pro-- portion as the increase in the linear speed of the wire, or with an increase of size only, to obtain, more than, or even as great a speed of vibration as is obtainable in a smaller machine. This drawback arises from the fact that the whole of the wiresupporting frame, including the breast roll, the tube rolls and the under-wire rolls, etc., requires to be vibrated, the weight or mass of the several parts offering considerable inertia and when in motion developing a momentum which renders an increase of speed in vibration beyond certain narrow limits a practical impossibility.

This invention has for its object, and consists of, a construction of .lFourdrinier machine in which the vibratory movements of the wire can be greatly accelerated comparatively to 'those ordinarily obtainable, and in the required ratio to the linear speed of the wire, throughout a range of speeds and/or sizes of machines exceeding those in common use, thereby enabling .a quality of paper to be obtainedin a high speed; or

large machine equal at least to that obtained in a slow speed or small machine.

In the known machines the wire-supporting frame comprises side bars whereon are mounted the breast roll, the tube rolls and Specification of Letters Patent.

or frame.

The reason for this is that in in- Patented May 13, 1919.. Serial No. 269,503.

the under-wire rolls, etc., the side bars being carries the vacuum boxes, etc, and at the ends next the breast roll to a vibrating bar In some cases the breast roll is carried from the vibrating bar or frame, and in others it is carried directly from the side bars. The vibrating motion is imparted to the bar or frame by means of an eccentric or crank, the vibrating motion of the frame ceasing at the ends'next the vacuum boxes, while the vibrating motion of the, Wire itself extends to the guide roll. With the wire frame and the Wire thus arranged and operated the vibratory motion of the wire relatively to the tube rolls is at a maximum where the wire passes over the tube rolls next the vacuum boxes and at a minimum where it passes over the tube roll next the breast roll.

According to this invention only those parts essential for the formation of the paper are vibrated, or said parts are vibrated independently of the side frames, tube rolls and under-wire rolls, which arepreferably not vibrated.

In one example, the wire, breast roll and parts of the deckle straps in contact with the wire are alone vibrated by the vibrating mechanism. In another example, the wire, the breast roll and its supporting frames (when separate from the tube-roll supporting frames) and the deckle frame on said breast-roll supporting frame are alone vibrated. In a further example, the wire, the breast roll and the guide roll are alone vibrated. The guide roll usually arranged between the couch rolls and vacuum boxes may be arranged in advance of all, or all except one or two of the vacuum boxes, and to provide sufficient contact or pressure of i the wire on the guide roll to prevent the wire slipping sidewise relatively to the guide roll under the vibrating motion or shake,

be in unison with that of the breast roll but it may be at adifferent stroke. The deckle straps will in all cases extend at least to the first vacuum box.

A further feature of the 1nvent1on consists in making the supporting frames of the breast rollseparate from the tube roll support frames and in leavinga gap between such frames in order to facilitate the putting on or taking off of the wire.

The invention will be further described with reference to the accompanying drawings, wherein Figure 1 illustrates a side exterior elevation of the wet end of wire part of a Four- -drinier paper making machine embodying one example of the invention.

Fig. 2 illustrates a side exteriorelevation, and

Fig. 3 a plan of the same part of the machine but embodying modifications.

Fig. 4 illustrates a transverse sectional View looking from the vacuum boxes toward the breast roll.

Fig. 5 illustrates a side elevation of a out the invention according to one arrange side bars,

ment, the spindle of the framework being slidably and rotatably jou-rnaled in bearings b, b forming part of, or secured tothe stationary framework 0, the bearings and to allow of the end wise of the'roll'."

' To the spindle of the roll is connected any suitable form of regulatable' vibratory or shaking gear. In the example shown, the

vibratory movement spindle is formed with thrust gills or flanges a which engage a thrust block or slide a ha v1ng grooves in its upper part, said block belng slidably. supported upon a bracket 01, secured the block or slide is pivotally connected one end of a rod e which at its other end is adustably connected to a variable throw lever fulcrumed at its lowerend to a. stationary frame 9 and at its upper end engaging the stud of a power-driven disk crank The side bars 2', i are made fixtures, being rigidly secured to and supported by the stationary pedestal brackets or side I frames j, j resting upon the usual foundatlon orsole plates is. The tube rolls Z, Z are JOHI'IIELled as usual in bearings on the the rolls being free to rotate but havlng only an endwise movement sufiicient I prevent the roll spindles binding in their straps n, n, except those parts of the latter earing's. The deckle frames m and deckle in contact with the wire, are also held agalnst lateral movement, the frames and 6-5 guide pulleys being Supportedupon the side bars and'brackets j, 7.

breast roll a is to the stationary frame-work c. To

The roll 0 by which the endless wire 12 is guided as it passes forward to the couch rolls 9, g is arranged in advance of certain of the vacuum boxes 1', 7", instead of, as heretofore, between the vacuum boxes and the couch rolls. In the example shown it is arranged after the first vacuum box and in advance of the other four vacuum boxes. To allow of the necessary contact of the wire with the roll 0 to prevent lateral breast roll and wire vibrated, considerably less weight or mass has to be moved than heretofore in shaking the wire. Further, that in reducing the weight or mass, a considerable increase in the speed of vibration canbe obtained over that usually obtainable in machines of ordinary construction of like size without any of the drawbacks of the latter due to similar incrgase of vibration. The power required for operating the h vibrating parts will also be less than usuah a sufficient distance apart I ith the tube rolls Z, Z not vibrated and also with the guide roll 0 incapable of end wise movement, the relative sidewise motion of the wire to the tube rolls is the exact opposite of that obtaining in the ordinary machine, the maximum motion being at the tube roll next the breast roll and the minimum at the tube roll next the guide roll.

As shown in Fig. lthe guide roll 0 may be incapable of endwise movement. In Figs.

0 is also vibrated, it will insure of the vi-- bration or shake being effective for a longer distance or time than when only the breast roll and wire are vibrated.

As shown in Figs. 2 and 3, the uide roll 0 may be arranged in advanceof t e whole vacuum boxes, of which there may be any suitable number.

In arranging the guide roll in advance of -the vacuum boxes, the guide roll may be moved forward, or the vacuum boxes may be moved backward,. In the former case, the

shaking length of the Wire (assuming the roll is not vibrated) will be shortened,

while in the latter case the shaking length will be increased.

Although preferring to arrange the guide roll in front of all,-or all except one or two of the vacuum boxes, it may, as shown in Fig. 5, bein its usual position between the vacuum boxes and the couch roll, the vacuum boxes being horizontal or nearlyso.

While preferring the tube rolls Z. Z not to be vibrated, they may be free to slide to and fro in their bearings.

Instead of vibrating the breast roll independently of its supporting frames, said frames may also be vibrated, together with the deckle frame carried by such supporting frames.

In the example shown in Figs. 6, 7 and S, the supporting frames consist of flexible metal plates 2) secured at their lower ends to fixed members '0 and at their upper ends carrying the'bearings for the breast roll spindle and also the deckle frames a. The vibrating rod e is connected to the upper part of one of the frames, see Figs. 7 and 8, and when in operation therod vibrates the frames, breast roll and deckle frame as one, the plates 12 bending with the motion.

In cases where the position of the top couch roll is permanently fixed, the wire will run in a straight line from the guide roll to the underside of the top couch roll, the vacuum boxes being adjusted to suit the line of the wire. In cases wher the position of the top couch roll is not fixed and where'it may be desirable to alter its position, a wire roll to will be placed immediately after the last vacuum box, see Fig. 1, the position of the roll being such that the maximum movement of the couch roll will not cause the wire to leave it, thus maintaining a straight path of wire to suit the fixed position of the vacuum boxes. Or the vacuum boxes may be mounted on a frame which can be adjusted as desired to suit the angle of the wire.

The usual savealls as inside the wire are supported from the stationary side frames j, j, thus making the frame work much more open than hitherto. The frames for supporting the breast roll and the associated parts are preferably made separate from the a notvibrating (except in cases where the guide roll is vibrated) which will enable a dandy roll to be used on high speed machines with less difficulty than hitherto.

The under-wire rolls 8 will preferably be carried from the sole plates 74 and one of these may be used as a guide roll. The roll 5' nearest the breast roll may be moved horizontally and used as a stretcher roll.

Although preferring that the side frames, tube rolls, under wire rolls and deckle frames, etc., shall not be vibrated, it will be understood that, where desired, such parts 'or some of them, such as the tube rolls,

might be vibrated and in sympathy with the wire, but in such cases, the means of vibrating them will be independent of the means employed for vibrating the wire and breast r011.

From this it will be understood that the main feature of the invention is the vibration of the wire and breast roll (or wire, breast roll and guide roll) independently of the tube rolls and their supporting frames which may be incapable of vibrating, or, if vibrated, are vibrated by separate means. Alternatively stated, the essential feature of the invention is the reduction of the number of parts (or mass of material) through which the vibration is transmitted to the wire, only such parts as are essential'to theformation of the paper being vibrated by the wire-vibrating mechanism.

What I claim is 1. In a Fourdrinier paper, making machine, an endless wire, a breast roll and guide roll therefor, vacuum boxes over which the wire passes, deckle frames and deckle straps for limiting the sidewise flow of the pulp, side frames for supporting the breast roll, guide roll, tube rolls and under-wire rolls, and means for vibrating the wire independently of the said side frames, tube rolls and underwire rolls, as set forth 2. In a Fourdrinier paper making machine, an endless wire, a breast roll, couch rolls and a guide roll, vacuum boxes over which the wire passes, deckle frames and straps for limiting the sidewise flow of the pulp, stationary side frames for supporting the breast roll, guide roll, tube rolls and underwire rolls, and means whereby the wire and the breast roll and parts of the deckle straps in contact with the wire are vibrated, as set forth.

3. In a Fourdrinier paper making machine, an endless wire, a breast roll, couch rolls and a guide roll, vacuum boxes over which the wire passes, and which are set at an angle, between the couch rolls and gu de roll, deckle frames and straps for limitlng the sidewise fiow of the pulp, stationary side frames for supporting the breast roll, guide roll, tube rolls and underwire rolls, and means whereby the wire and breast roll and parts of the deckle straps in contact with the wire are vibrated, as set forth.

4. ln a Fourdrinier 'papermakmg machine, an endless wire, a breast roll, couch rolls and a guide roll, vacuum boxes over which the wire passes and certain of i lie behind the guide roll and at an an 1e and certain others lie in front of the gulde roll, deckle frames and straps for the sidewise flow of the pulp, stationary side frames for supporting the breast roll,

guide roll, tube rolls and underwire rolls, and means whereby the wire, thebreast roll and parts of the deckle straps in contact 1o with'the wire are vibrated, as set forth.

5. In a 'Fourdrinier paper making machine, an endless wire, a breast roll, couch rolls and a guide roll, vacuum boxes over which the wire passes, and which are set at an angle, between the couch rolls and guide roll, deckle frames and straps for limiting the sidewise traverse of the pulp, stationary,

side frames for supporting the breast roll,

' guide roll, tube rolls and means whereby the wire, breast roll and and underwire rolls,

guide roll and the parts of the deckle straps in contact with the wire are vibrated, the Vibrations of the guide roll being in unison with the breast roll butiat 'a different stroke, as set forth. a

6. .In a Fourdrinier paper making machine, an endless wire, a breast roll, couch rolls and a guide roll, vacuum boxes over which the wire passes and certain of which lie behind the guide roll and at an angle I and certain others of which lie in fron o the-guide roll, deckle frames and straps for limit ng the sidewise flow of the pulp, sta tionary side frames for thebreast roll, guide froll, tube rolls and underwire rolls, and

breast roll' and:

Witnesses:

means whereby the wire, guide roll, and. parts of the deckle straps the vibrations of the guide roll being in the wire, partsof the in contact with the wire are alone vibrated,

unison with the breast roll, but at a different stroke, as set forth.

7. In a Fourdrinier paper making ma chine, an endless wire, a breast roll, couch rolls and a guide 'roll, vacuum boxes over which the wire passes, deckle frames and straps for limiting the sidewise flow of the pulp, stationary side frames for supporting the guide roll, tube rolls and underwire rolls,

independent side frames for the breast roll I and one of the deckle frames, and means for vibrating said breast-roll frames and breast rolls and underwire rolls, independent side 3 frames for the breast roll and one of the deckle frames and means for vibrating said breast-roll frames and breast roll, the deckle frame on the said independent side frames,

deckle straps in contact with thewire, and the guide roll, as set forth.

In witness whereof, I have hereunto set my hand in the presence of two witnesses.

SAMUEL MILNE.

ALBERT HI'LIJARD, HELEN SUTHIERLAND.

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