US1866607A - Slice and head box for paper making machines - Google Patents

Description

July 12, 1932. R. wobb SLICE AND HEAD BOX FOR PAPER MAKING MACHINES Filed Sept; 6. 1929 .0 v n u Q f n L ,9. 4. 47/4. 4F- f 1 .Q.. H MW in van for. Ra/p/z Wood.

Patented July 12, 1932 mm woon, or

PATENT OFFICE smon HILL, rmsnvnrra. mission. so soonrun, a conronarron or rmmsxnvam ram. ml-

BEIGE HEAD BOX FOB m6 MACHINES Application ma Beneath-6,1989. Serial u an,

The object of my invention is to provide means for the regulation of the weightof pafir pulp stock to be fed through-the slice in ing delivered from the head box to the wire apron of the Fourdrinier, the regulation being such'that the vertical thickness of the jet of paper stock may be varied at spaced points transversely across the width of the machine, whereby the thickness of the 10 paper at those transverse points may be ac curately adjusted and maintained to assure a substantially uniform thickness throughout the whole width of the finished web.

My invention has for a further object, a better formation and flow of the ulp stock, whereby it may travel through t e slice at high speeds by reason of the absence of agitation in the jet, and by the smooth accelerating ap roach to the full s ed through the stllliroat of the head box and elivery from the My invention consists of the slice having a construction which enables the thiclmes of the jet at various spaced points transversely of the machine, to be adjusted so as to cause more or less paper stock to pass through the nozzle at said points, said improvements ineluding special slice adjustment means to the upper lip or' wall (preferably of'a flexible nature) and adjusted vertically in re spect to the bottom or lower wall: constituting a material part of the flow nozzle of the slice to vary the paper stock flowing through the nozzle.

My invention also consists in means for simultaneously adjusting. the vertical thickness of the jet throughoutthe entire width of the machine and moreespecially when associated with the spaced adjustment means above recited for-ad ustment of the upper lip of the slice.

.My invention further consists of means for,

rovidin a aduall I tapered assage or throat fr%m 111%: head x to the. whereby the stock is given an accelerating 'speed of flow and velocity of discharge with aminimum amount of agitation.

Myinvention also comprehends other fea-' ftures of construction which, t ther with 50 those above referred to, are y described rear end of the ce nozzle,

hereinafter andmore particularly pointed out in the claims;

Referring to the dra Fig. 1 is a vertical section of a/cornbin slice and head box of a paper making machine embod my improvements; Fig. 2 is an 'enlar new of a portion of Fig. 1; and Fig. 13". 1S a. front view of the means for supporting the upper lip or wall pf the slice nozzlei- The wire apron of the Fourdrinier is shown at 2, resting upon the table rolls 3 and extending about the breast roll 4.

The slice comprises the following constructron: 611 represents the side or pond, plates between whichthe nozzle 5 is arranged and forming end closure walls thereto, to insure the flowrof the water and stock through the nozzle. The bottom lip or table of the slice and its nozzle is shown at 6 and extends back horizontally from the breast 70 I roll. The adjustable to lip 7 of the slice is formed of a flexible pl ate yieldinglyconnected atits rear end to a transverse channel beam 15' and is a continuation of the; upper wall of the throat 8 leading to the 7s nozzle '5. The gieldin connection of the exible 7 with the channel beam 15, consists of i xible and slightl yielding sheet material "17 secured to V the lip plate and bottom of the channel beam 15, giving a slight yieldingness to the 11p plate This connection of the plate 7 withthe channel beam permits .the forward 11p of the plate to assume a more or loss smuous shape. under adjustment while the i rear end of theplate remains substantially straight and is carried by the rigid channelbeam' 15, The, cushion or yielding layer 17 is for the purpose of reheving the strain upon the lip plate 7 when twisted slightly under adjustment. 7 The channel beam 15 forms a rigid transverse' support exten entirely across the machine between the si as or pond latesfi'a and ishinged in the rear at 16 to e main transverse frame 33 forming an integral structure with the sides or pond plates.

A rock shaft 21 is-suitably journaled in relatively fixedbearings and is provided with one or-more eccentrics 20positioned in .i

sired a slot between the two arms 25 forming an integral structure with the transverse channel beam 15. The rock shaft 21 is provided with a segment of a worm wheel 22 with which meshes a worm 23, arranged to be rotated by a hand wheel and shaft 24. By this means, the rock shaft 21 may be rotated in one direction or the other, as may be necand is, in effect, locked in. any deposition of adjustment. It will be "understood that when the worm and worm wheel are rotated, the eccentric is also rotated and moves the channel beam 15 and the parts connected to it, about the hinge 16. 15 This adjustment will lower or raise the channel beam 15 and with it the flexible lip plate 7 toward or from the front end of the bottom plate 6, with the result that the nozzle 5 of the slice is varied in height simultaneously across the entire machine.

A transversely arranged angle bar 28a is rigidly attached to move with the oscillatory movements of the channel beam 15 and the lip plate 7. Secured-to theeforward face of 95 this angle bar 28a and in spaced relation are a. seriesof adjusting devices for adjusting the upper flexible lip of the lip plate 7 in the manner heretofore described.

I.will now describe the: details of the adjusting means for the upper lip of the slice nozzle; and as all of these means are allke, it will sufiice to describe one of them in detail.

Each device has a tubular body part 26 bolted to the face of the angle bar 28a. A

tubular bushing 26a snugly-fits the tubular bore of the body part 26 and is screw threaded at its upper end which is received within the threaded interior of a. nut lock 28. The tubular bushing is provided with a milled head 29 b which it may be rotated when not prevent by the lock nut. 27 is a screw threadedshaft which extends entirely.

through the tubular bushing and at its lower end it is hinged at 32 to the locknut 30 whose lower end is hinged at 31 to the upper side of the flexible lip 7 of the slice. 7 V

It will now be understood that by releasing the pressure of the locknut upon the upper part of the tubular bushing26, the said bushmg may be rotated upon the shaft 27 by rotating the head .part 29 and in this way adjusting the screw threaded shaft 27 in a vertical direction. The lock nut portion 28 is ad'usted to definitely hold the tubular. bus 'ng without any further rotation. Eaclr, one of the adjusting portions is of the same capacity and it is evident that the adjacent portions of the flexible lip 7 ma be also adjusted (to the various speeds) eit er in the same direction or in opposite directions, for varying .the vertical position of the throat 5 transversely across the machine.

When the adjustment is determined to be just what is to be desired, theentire'throat across the machine may be simultaneously ance of the pulp. The result of this is that increased or decreased by the manipulation ofthe hand wheel 24.

The head box 11 supplies the paper stock to the throat 8 under a static head equal to the height of the fluid in the upright passage 10 above the slice nozzle 5, and this static head may be increased or decreased by adjustment of the dam or bafiie plate 12 over which the paper stock flows. This plate 12 is guided in vertical guideways and is moved by a pinion 14 meshing with a rack 13 secured to the plate.

The throat 8 gradually decreases in area and reaches a minimum at the slice nozzle 5. By this construction the velocity of the pulp fluid mixture is caused to gradually increase invelocity reaching its maximum at the slice, nozzle 5 and this velocity or speed of flow through the throat may be regulated by varying the static headin the chamber 10 by manipulation of the dam or baflle .plate 12. The throat 8 and passage'lO arein the form of a sinuousor reverse curve, being'vertical at its large or static .head end and substantially horizontal at its orifice or nozzle end where it delivers to the wire 2, and said form provides normally a substantially constant head and a gradually changing in direction of flow to a maximum with the least disturba very uniform thickness or weight of the paper'is assured. i The jet of paper stock, as it emerges from the nozzle 5, is mainta ned of the proper vertical thickness by the adjusting devices 26 as before explained, which operate to position the lip 7 nearer to or further from the plate 6 and wire 2 for regulating the stock flow at various spaced points across the machine and whereby an even thickness of pulp sheet is formed on the wire.

As a further refinement, I prefer to employ vertical rectifierflplates 9 arranged .parallel across the throat 8, said plates being supn ported from the lower wall of the throat and sufiiciently narrow as not to obstruct the free flow of the fluid. The object of these rectifier plates is for straightening out any small cross currents or disturbances in the fluid flow which may occur and thereby obtain a straight flow from nozzle 5.

The main transverse frame 33 as a whole is vertically adjustable and by means of a lifting jack 35 may be lifted at times of changing the wire about the breast roll 4. At other times this frame 33 is lowered to the position shown and forms liquid tight joints at 36 to prevent undue leakage of the paper stock from the throat.

For convenience of the operator in making adjustments a footway 39 maybe provided transv ersely across the machine above the slice. Also, a tube gauge 38 may be employed opening into the throat at 37 for showing the actual head of pulp being employed while the machine is running.

' It will now be apparent that I have devised a novel and useful construction which embodies the features of advantage enumerated as desirable, and while I have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisfactory and rehable results, it is to be understood thatI do not restrict myself to details, as the same are susceptible of modification in various particulars without departing from the spmt and scope of the invention.

from and wherein further, means are rovided for bodily liftin the slice clear 0 thewire of the aper ma g machine without disturbing t e relative adjustments of the plurality of adjusting means of the nozzle and lip thereof.

In testimony of which invention, I here unto set my hand.

' RALPH WOOD.

Having now described my inventioriewhat I claim is new and desire to secure by tters Patent, is:

1. A slice for paper making machines comp'rising a throat terminating in a nozzle, the upper lip of which is flexible, combined with a plurality of adjusting means arranged at spaced intervals across the machine for separately adjusting the nozzle lip to provide capacity for varyin the vertical size of the nozzle orifice and uid jet delivered therefrom and wherein further, the throat is made tapering in cross sectional area along itslength and means constituting a static head within the throat are provided at its largest end for adjusting the static head to provide regulable initial velocity pressure.

2. A slice for paper making machines comprising a throat terminating in a nozzle, the upper lip of which is flexible, combined with a plurality of adjusting means. arranged at spaced intervals across the machine for separately ad'usting the nozzle lip to provlde capacity or varyin the vertical size of the nozzle orifice and uid jet delivered therefrorn and wherein further, the throat is di-' vided transversely near its nozzle made taper- 1 ing and provided near its nozzle end with capacity for varyinig parallel rectifier plates in the nozzle end to straighten out cross'currents which ma be 4. A slice. for paper making-machines comprising a throat terminating in a nozzlethe upper lip of which is flexible, combin with a plurality of adjusting means arranged at spaced intervals across the machine for v separately adjusting the nozzle lip to provide the vertical size of the nozzle orifice and aid jet delivered there-1 present in the flowing pulp to insure uni orm

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