US1803044A - Paper-making machine - Google Patents

Description

April 28, 1931- c. w. VALENTINE PAPER MAKING MACHINE Filed Nov. 22, 1929 Patented Apr. 28, 1931 UNITED STATES PATENT OFFICE CHARLES W. VALENTINE, OF WATERTOWN, NEW YORK, ASSIGNOB TO THE BAGLEY AND SEWALL COMPANY, OF WATERTOWN, NEW YORK, A CORPORATION OF NEW YORK PAPER-MAKING MACHINE Application filed November 22, 1929. Serial No. 408,956.

This invention relates to certain improvements in Fourdrinier paper making machines, and particularly to an improved slice construction by which the supply of pulp to the making wire of the machine is properly controlled.

- In making paper on a Fourdrinier machine, the pulp 'or stock is delivered from the head box ontothe making wire under an adjustable 1 mechanism known as a slice. In order to se cure the proper formation of the paper web, it is necessary that the web or sheet be of uni-, form thickness across its entire width without weak spots or other imperfections. The

5 obtaining of a web of uniform thickness has been effected by providinga slice having a flexible or adjustable edge or lip which can be so adjusted that the opening between the slice and the wire is the same height widthgo wise of the machine, such construction being described and claimed in my prior patent No. 1,619,168, dated March 1, 1927, and this construction has been very effective for certain qualities of paper, such as news or kraft. For certain other and finer qualities of paper,

such as bond paper, while the use of the adjustable lip or edge gives good results, this construction alone does not give as much intel-meshing or intermingling of the fibres on the wire as will produce the most satisfactor sheet or web.

t is the particular object of the present invention to combine with the slice having the adjustable lip or edge a secondary or additional slice spaced from the main slice, the action of this secondary slice, when used with the adjustable lip. feature of the main slice an-intermingling or intermeshing of the fi er's such as will produce a very satisfactory sheet or web of the finer qualities of paper, this being particularly effective in the wide, high speed machines such as are now common y used.

It is a further object of the invention to provide such a construction in which the secondary slice may be readily adjusted independently of or relatively to the main slice and in which this secondar slice may, i

. desired, be readily and quick y moved out of 3 the way, so that if desired for any purpose the machine can be run as a single slice machine.

A further object of the invention is to produce such a construction of few parts and which can be operated in a simple and quick manner to effect the desired adjustments.

With these and other objects not specifically referred to in View, the invention consists in certain novel parts, arrangements and combinations which will be described in connection with the accompanying drawings and the novel features pointed out in the claims hereunto annexed.

In the drawings, which show a preferred embodiment of the invention, 65 Figure 1 is a partly broken awa partly sectional top view of the improv mechanism;

Figure 2 is a front view of the construction shown in Figure 1, and

Figure 3 is a central vertical sectional view, the section being taken on line 3-3 of Figure 2.

Referring now to these drawings, the breast roll and part of the maln'ng wire of a Fourdrinier machine are illustrated, the rest of the machine being omitted as unnecessary for an understanding of the invention, such machine being well known in the paper making art. This breast roll is marked 1 and the making wire which passes over this roll is marked 2. The pulp is delivered from a head box, the sides 3, 4 of which are shown in Figure 2, and the pulp is delivered from this box onto the making wire under a slice mechanism of improved construction hereinafter referred to.

This slice, in the construction illustrated, co-

operates with an apron board 5 forming art of the bottom of the head box, between w ich and the lower edge of the slice the pulp or stock is deliverd to the wire, the apron board extending, as shown, partly over the wire and the breast roll.

' The slice construction includes a main slice, indicated generally by the numeral 6, and an auxiliary or secondary slice, hereinafter more fully referred to. The main slice 6 is in the form of a metal plate 7, which extends across the front of the head box and is provided with reinforcing ribs 8. This mm m slice is provided with a lower flexible or adjustable edge or lip 9, and the construction and the operation of this main slice may be and preferably is generally like the construction and operation shown in my prior patent above referred to. p The plate 7 is mounted for vertical movement in side guides 10, one of which is shown in Figure 1, this main slice being vertically adjustable as a whole by means of hand wheels 11, 12, through suitable connections, not necessary to describe. By these hand wheels, the slice as a whole maybe raised or lowered to provide the desired opening between the slice and the cooperating wire. The adjustable lip or edge 9 may also be adjusted by means of hand wheels 13 and rods 14 disposed at suitable intervals along the front edge of the slice.

In accordance with the invention, there is combined with this main slice a secondary slice, this secondary slice being arranged in the head box behind the main slice and spaced therefrom, and this secondary slice is arranged so that it can be adjusted to and from the apron board independently of the main slice, so that a suitable opening may be formed between the lower edge of the secondary slice and the apron board. This construction, when taken in combination with the main slice and its adjustable lip, effects an interming'ling or intermeshing of the fibers which enables the production of a good web with stock of such character as is diflicult to form a sheet from by the use of the main slice alone.

While the secondary slice and the means for adjusting it may be varied, as shown, this secondary slice is in the form of a plate, preferably of metal, marked 15, which extends across the machine and is free to slide vertically in uides 16 formed in the sides of the head boxfiiefore referred to, and this slice is preferably formed on its lower edge with an enlarged portion or bead 17. This slice 15 is further provided with stiffening ribs or flanges 18 which are secured to the slice and extend outwardly against the back of the plate 7 of the main slice 6, but arranged so that they are free to slide against the plate 7.

While the means-for adjusting the secondary slice 15 may be varied within certain limits, these adjusting means are such that the secondary slice may be adjusted independently of the main slice. In the particular construction illustrated, there is provided a central screw rod 19 which carries an operating hand wheel 20. This screw rod passes through a threaded section 21 on one of the strengthening ribs 18, before referred to, and

this screw rod is secured to a block 22 on a top bar 23 of the main slice 6. By operating the hand wheel 20, the slice 15 may thus be raised or lowered relatively to the main slice. If desired, for obtaining a finer adjustment or leveling up the position of the secondary slice 15, adjusting screws 24, 25, operated by hand wheels 26, may be provided at each end of the slice, so that after the slice has been roughly adjusted by the hand wheel 20 it can be evened or leveled up by the hand wheels 26.

In the operation of the device, the slice as a whole, both main and secondary, is adjusted by means of the hand wheels 12, so as to give approximately the same opening between the slice 6 and the slice 15 and the apron board and the makin wire. The front or main slice is then ad usted, by adjusting its adjustable lip or edge, to give the desired opening for the pulp which is to be fed onto the making wire, and the secondary slice is then adjusted so as to provide an opening between its lower edgeand the apron board which is a little deeper than the o ening between the front or main slice and t e wire, this having been found in practice to give the desired intermingling or intermeshing of the fibers of the stock.

If it be desired to operate the slice as a single slice, as may be desirable in the production of certain qualities of paper, the secondary slice may be moved up out of the way, by means of the hand wheel 20, so that it has no effect on the pulp passing under or through the main slice.

With the construction shown and described a very simple and effective control-of the feed of the pulp to the making wire has been effected, and a ood sheet may be produced from stock whic would be difficult to handle with the use of a single slice, the various parts of the slice cooperating to produce a good sheet under the conditions above set forth.

While the specific mechanism shown for effecting the objects of the invention is. a preferred one, it will be understood that various changes may be made in the specific construction and arrangement of the parts without departing from the invention as defined in the claims hereunto appended.

What is claimed is: 1. In-a paper making machine, the combination with the head box and the making wire, of a main slice having an adjustable lip or edge, a second slice spaced from the main slice, means for moving the slices to- 2. In a paper making machine, the combination with the head box and the making wire, of a main slice having an adjustable edge or lip, a second slice movable with and arranged behind the main slice, means for adjusting the second slice relatively to the main slice, and means for leveling up the secondary slice.

3. In a paper making machine, the combination with the head box and the making wire, of a main slice having an adjustable lip, a second slice connected with the main sliceand movable therewith, and means for adj usting the second slice independently of the main slice.

4. In a paper makingomachine, the combination with the head ox and the making wire, of a main slice and means for adjusting it, a second slice connected to move with the main slice and spaced therefrom, and means for effecting an adjusting movement of the second slice relatively to the main slice.

5. In a paper making machine, the combination with the head box and the making wire, of a main slice having an adjustable lip or edge, a second slice spaced from the main slice, a screw rod'carried by the main slice and connected with the second slice for adjusting the latter, and means for manipulatmg the rod to adjust the second slice independently of the main slice.

6. In a paper making machine, the combination with the head box and the making wire, of a main slice having an adjustable lip or edge, a second slice spaced from the mam slice, a screw rod carried by the main slice and connected with the second slice, means for manipulating the rod to adjust the sec ond slice independently of the main slice, and separate screw rods for leveling up the second slice.

7. In a paper making machine, the combination with the head box and the making wire, of a main slice having an adjustable lip or edge, a second slice spaced from the main slice and movable therewith and means for moving the second slice out of the way so that the machine may operate as a single slice machine.

In testimony whereof, I have hereunto set my hand CHARLES W. VALENTINE.

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