US1481163A - Pulp-sheet-leveling attachment for paper-making machines - Google Patents

Description

.Ean. 15, 1924.

C. R. VAN DE CARR. JR

PULP SHEET LEVELING ATTACHMENT FOR PAPER MAKING MACHINES Filed Feb. 3. 1920 3 Sheets-Sheet 1 3am. '15, 1924. 1,481,1fi3

c. R. VAN DE CARR, JR.

PULP SHEET LEVELING ATTACHMENT FOR PAPER MAKING MACHINES Filed Feb. 3, 1920 3 Sheets-Sheet 2 fiyzwlzfar jan. 15, 1924. E 48l,l63

C. R. VAN DE CARR, JR

PULP SHEET LEVELING ATTACHMENT FOR PAPER MAKING MACHINES Filed Feb zni Q1920 I5 Sheets-Sheet 5 m, N s l J E f w I J 3 1 r I I l l i l Patented Jan; 15, 11924.

UNHTED STATES PATENT @FFHCE CHARLES R. VAN DE CARE, 31%., OF GRAND MERE, QUEBEC, CANADA.

PULP-ST-LEVELING ATTACHMENT FOR PAPER-MAKING- raaonrnns.

Application filed February 3, 1920. Serial No. 355,917.

To all whom it may concern:

Be it known that I, CHARLES R. VAN DE CARR, Jr, a citizen of the United States, residing at Grand Mere, Province of Quebec, Canada, have invented certain new and useful Improvements in Pulp-Sheet-Leveling Attachments for Paper-Making Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention has relation to a device adapted for connection to the Fourdrinier type of paper making machines, for controlling the delivery of the to. the wire.

he principal object of the invention is to provide for the delivery of pulp to the wire in such manner that the contraction of the 'et is partially or totally eliminated due to t e design of the approach of the pulp delivery orifice.

Another object of the invention is to provide for the regulation of the weight of the pulp sheet at various points across the width of the machine by means of varying the thickness of the jet at points required.

A further object of the invention is to provide a better formation at higher speeds, due to the elimination of agitation in the jet, caused by the contractions of the latter, as is formed in the standard slice used on modern Fourdrinier machines.

A still further object is to provide for the control of the paper sheet by changing the weight of the sheet at any point desired which results in higherfinished paper, due to better formation, and also in stronger paper due to better formation and lower pergentage of sulphate, where sulphate is use With the above and other objects in view which will hereinafter appear as the description continues, the invention consists of the novel features of construction, combination and formation of parts as will be hereinafter more fully described and particularly pointed out in the appended claims.

In the accompanying drawings has been shown a simple and preferred form of the invention, it being, however, understood that no limitation is necessarily made to the precise, structural details herein exhibited, but the right is hereby reserved to any changes, alterations or modifications to which recourse may be had that come within the scope of the claims without departing from the spirit of the invention or sacrificing the efficiency of the same.

In the accompanying drawings:

Figure 1 is a front elevational view of the improved paper machine attachment and breast roll;

Figure 2 is an end elevational view of the device applied to a section of the standard Fourdrinier machine;

Figure 3 is anend elevation of the device detached from the machine;

Figure 4 is a fragmental elevation of the device;

Figure 5 is a fragmental front elevation of a modified form'of the device; and,

Figure 6 is an end elevation of the same.

Heretofore, the main objection encountered in machines of the Fourdrinier type, is that the jet of the stock, namely the fibre and water mixed, is subject to more or less contraction, as it leaves the head box orifice for disposition upon the wire. With the present device, there is practically no contraction of the pulp stock and when this condition is reached in the operation of the machine, it is often found that the pulp sheet at various points across the wire is of different weight, and in order to regulate or level up the sheets, I have provided means for warping the lip of the device, so as to thicken or thin up, the jet of stock at any desired point, thereby raising or lowering the weight at this point and providing for the running of a practically level sheet under any conditions.

In both forms of the invention illustrated in the drawings hereto annexed, the numeral 10 designates the conventional head box of a Fourdrinier paper machine, and 11 the perforated board, through which the stock passes before going into the pond and passing on the wire 12. The location of board 11 varies on certain machines and the same isentirely eliminated on others.

The head box 10, at its opposite ends, I

improved attachment, which overlap each other at the central part of the jet feed space between the end pieces 14 Plates 15 ,and 16 have their overlappin ends formed with registering slots 17 t rough which pass wing bolts 18, by which the two plate portions are clamped together when proper adjustment for the width of the pulp sheet is desired.

These plate portions 15 and 16 are connected at the end beams of the machine frame, not illustrated, by means of the brackets 19, which latter are provided with screws 20, by means of which the plates 15 and 16 may be raised from or ad usted towards the wire 12 to regulate the vertical dimension of the orifice 21 between the lip portion 22 of the'said plates and the wire 12. Extending across the upper part of plates 15 and 16 and having their opposite outer ends mounted in the sleeve extension 22 of the brackets 19 are the annular supporting members 23 and 24 for the device and the latter are of tubular construction and telescope into each other to allow for the narrowing up or widening out of the plates 15 and 16 to which they are connected by means of the straps 25.

The brackets 19 adjacent their lower ends are likewise formed with the sleeve extensions 26 which support the outer ends of the tubular supporting members 27 and 28. These sleeve extensions 26 are connected to the lower art of plates 15 and 16 by straps 29 and t e tubular supporting members 27 and 28 slide relative to each other, and may, like their associated members 23 and 24, be adjusted to accommodate the machine for different widths of wires.

The tubular supporting members 27 and 28, have formed thereon, the flanges 30 and 31 in which are mounted the small adjusting screws 32, the lower ends of which carry the clips 33, suitably connected to the lip portions 22 of plates 15 and 16. llhese small screws 32 may be adjusted to warp the lips of plates 15 and 16, to regulate the orifice 21,

so as to thicken or thin out the jet or stock at any desired point.

It will thus be seen that upon the adjustment of certain of the small screws 32, the lip portions 22 of plates 15 and 16, will be forced toward or away from the wire 12, thereby regulating the depth of the orifice 21 at the desired point or points. In this manner, the feed of the stock jet may be regulated at different points and an even pu p sheet formed upon the wire.

This wire 12 travels over the carrying rollers 34', the breast roll 35 and the return roll 36 in the manner common to the ordinary Fourdrinier machines.

In the modification illustrated in Figures 5 and 6, a shaft 37 has hearings in the head box end pieces 38 and carries two pulleys memes box at the opposite ends thereof.

As in the preferred form, the front open side ofthe head box 40 is closed b two overlapping plates 41 of arcuate configuration in cross section and the same are secured in any appropriate manner to the frame beams 42. These plates 41 have their outer free edges or lip portions 43 normally spaced from the pulp wire 44, which latter travels over the carrying rollers 45, one of which is illustrated and the breast roll 46.

Brackets 47 are secured by bolts 48 to the frame beams 42 forward of and immediately in front of plates 41 and said brackets 47 are provided with interiorly threaded collar portions 49 in which are mounted the main adjusting screws 50.

A transverse bar 51 has its ends 52 directed at right angles to its longitudinal continuity, and said ends 52 are rigidly connected to the adjusting screws 50. A plurality of screws 53 are disposed in spaced relation on bar 51 taking into interiorly threaded apertures provided therefor. The lower extremities of screws 53 carry theclips 54 which latter are secured at their ends by screws or rivets 55 to the lip portions 43 of plates 41. The upper extremities of screws 53 are provided with heads 56 and mounted on the threaded portion of each screw 53, between the transverse bar 51 and the heads 56, are the auxiliary adjusting head members 57. The hub portions 58 of the lock nuts 57, normally bear against the upper edge of transverse bar 51, and when certain of the screws 53 are adjusted to regulate the vertical dimension of the orifice 59 at difierent points, the auxiliary head members 57, associated with these particular screws 53, will serve to hold the latter in adjusted positions.

In this manner, the plates 41 may be adjusted in their entirety, by regulating the main adjusting screws 50, while the adjustment of the orifice 59 at the difierent points is effected by adjusting the individual screws 53. The last mentioned adjustment will warp the lip portions of plates 41 and consequently when the pulp sheet at various points across the wire is of difierent weight, in order to level up the same, the said screws 53 will be tightened at the desired points to reduce the orifice opening through which the stock sheet is fed. By this regulation the weight of the sheet at various points permits of the better formation of the sheets at higher speeds due to the elimination of agitation in the jet caused by the contractions of the same, as is found in the standard slice used on the modern Fourdrinier machines.

For guiding the pulp sheet through the orifice 59 and to prevent the pump from running over the conveyor, I provide the deckle belts 66 which latter are trained over the pulleys 39 on shaft 37 and the actuating aemcs spaced from said wire to form a pulp feeding orifice, brackets for supporting said plate, a transverse bar connected tosaid.

brackets, screws arranged on said brackets and adapted for actuation to elevate and lower said plate with respect to said wire, and screws mounted in said transverse bar adapted for warping said plate to increase or decrease the thicknessof the pulp sheet at .diflerent points on said wire.

2. The combination with the Fourdrinier type of paper making machines including the pulp head box and endless wire, of a device comprising anjarcuate shaped plate adapted for closing one side of said head box, brackets secured to the machine frame for supporting said plate, said plate having its lower edge surface spaced from the wire to form a pulp outlet orifice, screws arranged in said brackets for adjusting said plate with respect to said wire to regulate the vertical dimension of the orifice and screws mounted on said plate for regulating the thickness ofthe pulp sheet at different points on the 1 wire.

In witness whereof I have hereunto set my hand.

CHARLES R. VAN DE CARR, JR.

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