US2244746A - Papermaking machine - Google Patents

Description

J1me 1941- F s. VANIVOORHIS 2, ,7

PAPERMAKING MACHINE Filed Aug. 10, 1939 3 Sheets-Sheet 1 M cu t\ m vi mVENTok Fwd 5. Van vuurhi s BY Q ' ATTORNEY June 10, 11941.. F. s. VAN v om-ns' I I 2,244,745-

PAPERMAKING mourns Filed Au 10, 1939 V s Sheets-Sheet 2 June 10, 1941. s, VAN vo 2,244,746

PAPERMAKING MACHINE Filed Aug. 10, 1939 3 Sheets-Sheet 3 ULLIII/ IN IN Ill/ IIV /6 ll \l4 FIE .4.

INVENTOR Fran 5. Van Vnurhi5 z & S ATTORNEY Patented June 10, 1941 UNITED STATES PATENT OFFICE PAPERMAKING MACHINE Fred S. Van Voorhis, Saugerties, N. Y. Application August 10, 1939, Serial No. 289,384

6 Claims.

This invention relates to-paper-making ma chines of the Fcurdrinier type.

One object of the present invention is to provide an improved construction and arrangement for supplying the paper pulp to the Fourdrinier wire for the purpose of increasing the efficiency of the operation, increasing the production of the machine, and improving the uniformity, strength, and quality of the paper.

Another object of the invention .is to provide improved means for the feeding of an increased amount of pulp to the wire when handling fibers requiring an increased volume of water.

A still further object of my invention is to provide for the wire an improved construction of breast roll having suction means and an adjustable member spaced from the wire to provideo. feed slot and chamber for the pulp, and still another object is to provide an imperforate member or "slow board having slicesor at least one slice-cooperating therewith to control the fibers and form the paper upon the wire without at the same time extracting moisture therefrom.

Still another object is to provide removable and interchangeable members adapted to cooperate with the breast roll to form feed chambers for the pulp of varying cross-sectional areas adapted for the handling of fibers having different characteristics and for the production of papers of varying types, grades, and thicknesses.

Fig. 7 is a detail perspective view showing a modified form of said feed member.

Referring to Figs. 1, 2, and 3, which show the so-called wet end of the paper-making machine, the Fourdrinier wire i0 is carried on a perforated breast roll H mounted so as to rotate upon a stationary shaft l2 (Figs. 4 and 5) which is connected to a suction pump and has perforations 13 so that moisture may be drawn through perforations II in the roll ll. End plates l5 secured on the hollow shaft l2 carry a stationary incomplete cylinder l6 having a longitudinal gap extending between said plates I 5 and through one-quarter of the circumference, as shown at Figs. 2 and 5, so that the action of the suction is restricted to the upper right-hand section of the roll I I, Fig. 2.

The pulp is fed to the wire III on the roll II from a flow box I! having a central partition It by which it is divided into a receiving chamber I9 and a,delivery chamber '20. The pulp is fed to the receiving chamber l9 from a passage or channel 2| to which the pulp is supplied from a ro- I tating screen 22 and/or from a mixing box 23 With these and other objects in view, the invention consists in the novel construction and arrangement of parts hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the construction, form, and minor details may be made without departing from the spirit of the invention or sacrificing any of the advantages thereof.

In the drawings, 7

Fig, 1 is a somewhat diagrammatic and partly sectional view, showing one end of a Fourdrinier machine;

Fig. 2 is an enlarged, cross-sectional detail view showing a part of the apparatus illustrated in Fig. 1:

Fig. 3 is a plan view showing the same end of the machine;

Fig. 4 is a longitudinal section of one end of the breast roll, taken on the line 4| of Fig, 5;

Fig. 5 is a cross-section of the same;

Fig. 6 is a detail perspective view showing part of a pulp feed member; and,

having partitions 24, 25, to provide a tortuous passage for the pulp and having an inlet port 26, Fig. 1.

The rotating screen 22 may have a shower 21 of any known type, and pulp may be supplied to the channel 2| from the screen 22 alone or may be supplied exclusively from the said mixing box 2-3, or alternatively pulp may be sup plied to the channel 2| from both these supply sources simultaneously.

As the pulp is supplied through the receiving chamber l9 to the delivery chamber 20 of the box I! the level of the pulp reaches the outlet gate or slot 28, and the feed of the pulp may be regulated so as to vary the static head between the limits indicated at Figs. 2 and 3. At the lower edge of the gate or slot 28 the box I! is formed with an apron '29 for engagement with the wire upon the circumference of the breast roll H, while the upper edge of the said gate or slot is formed by the lower extremity of an adjustable and interchangeable member 30 whichin the form shown at Figs. 1 and 2-is provided with a curved, arcuate surface 31 which is spaced from, and substantially concentric to, the circumference of the breast roll when in the adjusted position shown in these figures. The member 30 is removably mounted on a back plate 3| havin toothed racks 32 engaged by toothed pinions 33 on a. spindle 34 having a hand-wheel 35 by means of which the member 30 may be raised orlowered tov adjust the width of the gate or slot 2% and to modify the shape of the ch "11 be: 36 formed between the said arcuate surface 31 of the member 30 and the surface of the wire upon the breast roll 1 i, and the arrangement is such that upward movement of the member it from the position shown at Figs. l and 2 increases the width of the slot 28 and so changes the shape of the chamber 36 that the upper extremity of the chamber increases to a greater extent than the lower extremity, so that when the member 30 is in a raised position the pulp pass-= ing upwardly through the chamber 3% passes between diverging walls formed by thesurface 3i and the wire. The ends of the member 3%? are arranged between fixed side plates 38 carried on the wall of the box I! and aprons of canvas and rubber of any suitable or well-known construction are provided on the inner faces of the plates 38 for engagement with the said member at to prevent escape of the pulp which is thus supplied to the upper horizontal reach of the wire l8 where it is acted upon by the deckle 39 in the usual, well-known manner.

Beneath the upper, horizontal stretch of the wire l0, tube rolls 40 are mounted in the usual manner, and an important feature of this invention is the provision of an imperforate plate or slow boar M located between tube rolls 3E and beneath the wire Hi, this slow boardcoiperating with two or other suitable number of slices 2 adapted to control the fibers in the pulp in the manner required without at the same time increasing the separation of water therefrom.

Referring particularly to Fig. 7, the member 43 is adapted to replace the member 36 for use under certain conditions, these members it, d3

being formed with angle bars 44, 45 respectively having perforations by means of which they may be connected by removable screws 6? or otherwise to the back plate 3!, Fig. 6. When it is desired to adapt the machine for the handling of slow fibers, the member 43 is substituted for the member 30 so as to provide an enlarged chamber between the surface of the wire it on the breast roll H and the opposed surface of the said member 43.

An important eature of theinvention is the provision of means whereby a larger volume of moisture may be supplied in connection with the handling of certain types of fibers. In such cases the pulp may be supplied from the box 23 and simultaneously from the screen 22, the static and the rolls, but not to the slices, and the maximum shake imparted to the wire is at the extreme right-hand'end (Fig. 1) thereof.

' The improvements in the control of the operation increases the speed of production and the uniformity of the formation of the paper, the separation of the moisture from the pulp takes place at that part of the wire at which the shake is at its maximum, so that the fibers are laid in a more eifective manner and the strength and quality of the sheets is thus improved. A further advantage is that satisfactory results can be obtained with wire of considerably less length than heretofore employed, .or, alternatively, wire of the'usual length may be employed with greatly improved results.

Although the drawings and the above description disclose the best mode'in which I have contemplated embodying my invention, I desire to be in no way limited to the details of such disclosure, for in the further practical application of my invention many changes in form and con struction may be made as circumstances require or experience suggests without departing from the spirit of the invention withinthe scope of the appended claims.

\ What I claim is:

1. A paper-making machine of the character described comprising a breast roll for the Fourdrinier wire, means for mounting saidroll on a horizontal axis, a pulp-delivery chamber, a horizontal ledge for delivery of the pulp irom said chamber to the wire on said roll on a level with the roll axis, a member spaced from said ledge to form a pulp-delivery slot, an arcuate surface formed on said member and approximately conforming to the curvature of the roll andspaced therefrom to form a pulp-receiving chamber, and means for adjusting said member to modify the width of the said slot and the capacity and shape of the receiving chamber.

2. A paper-making machine of the character described comprising a breast roll for-the Fourhead in the chamber 20 of the box ll may be fiber that forms very quicklyparticularly' a very long fiberthe moisture must pass through the wire as uniformly as possible, and the fiber should have a very high percentage of water. This excess of water in the pulp necessitates uniformity of drainage, and the improved apparatus is adapted, to suit varying conditions by the modification of the supply of pulp, the variation in the static head in the box II, the adjustment of the slot 28, the variation in the chamber 36, regulation of the degree of suction in the upper right-hand quarter of the breast roll lj (Fig. 2) and the adjustment of the slices 42 above the slow board B l.

Shake or vibration is imparted to the wire by means of a crank device .48 through a connection 49, so that movemeiitv is imparted to the wire drinier wire, means for mounting said roll on a horizontal axis and for imparting vibratory movement .thereto, a pulp-delivery chamber, a horizontal ledge for delivery of the pulp from said chamber to the wire on said roll on a level with the roll axis, a member spaced from said ledge to form a pulp-delivery slot, means for varying the static head of the pulp above -said slot, suction mechanism in said roll, an arcuate surface formed on said member and spaced from the surface of the roll to form a pulp-receiving chamber, and means for raising or lowering said member to increase or decrease the width of said delivery slot and to vary the capacity of said receiving chamber.

3. A paper-making machine of the character described comprising a perforated breast jroll carrying the wire, means for supporting said roll in a horizontal position and for imparting vibratory movement thereto, a chamber for the supply of pulp, an apron carried by said chamber forthe delivery of pulp from the chamber to the wire upon the roll along a line parallel to and approximately level with the roll axis, an adjustable member having its lower edge spaced from said apron to form a variable pulp-delivery slot, a surface formed on said member and opposed to the wire on the upper part of the roll to form therewith a chamber of variable dimensions, means for adjusting said member to vary the size of the slot and the chamber, tube rolls arranged beneath the upper horizontal reach of the wire,

and an imperforate plate located beneath the said horizontal reach in proximity to said tub rolls, and at least one adjustable slice mounted over the wire above said plate.

4. A paper-making machine of the character described comprising a perforated breast roll carrying the wire, suction means for said roll, means for supporting said roll in a horizontal position and for imparting vibratory movement thereto, a box for the supply of pulp, an apron carried by said box for the delivery of pulp to the wire upon the roll along a line of maximum vibration, being a line level with the roll axis, an adjustable member spaced from said apron to form a variable pulp-deliveryslot, a surface formed on said member and opposed to the portion of the wire above said slot, to form therewith a pulp-receiving chamber of variable dimensions, means for adjusting said member to regulate the depth of the slot and the shape and capacity of the chamber, an imperforate plate Fourdrinier wire and mounted on a horizontal axis, an apron for the delivery of pulp from said slot to said wire at the level of said axis, a suction chamber in said roll extending from said slot to the commencement of the horizontal reach of the wire for extracting moisture from the pulp, a pulp chamber formed about said suction chamber externally of the wire, means for varying the dimensions of said slot and the capacity and shape of said pulp chamber, means for vibrating said roll, an imperforate board beneath the upper reach of the wire, and a plurality of adjustable slices cooperating with said board to control the fibers without expressing moisture from the pulp.

6. A paper-making machine of the character described comprising a fiber-mixing box, means for receiving pulp from said box, a pulp-delivery slot in said means, a perforated breast roll carrying the Fourdrinier wire and mounted on a horizontal axis, an apron for the delivery of pulp from said slot to said wire at the level of said axis, a suction chamber within said roll extending from said slot to the commencement of the horizontal reach of the wire for the initial extraction of moisture from the pulp, a pulp chamber formed around said suction chamber externally of the wire, means for varying the dimensions of said slot and the capacity of said pulp chamber, tube rolls beneath the upper horizontal reach of the wire, means for vibrating all said rolls, an imperforate board beneath the upper reach of the wire in proximity to said tube rolls and an adjustable slice cooperating with said board to control the fibers upon the wire without at the same time expressing moisture therefrom.

FRED S. VAN VOORHIS.

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