US 1928107 A
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Sept. 26, 1933. R T LANG 1,928,107
METHOD AND APPARAT'us'FoR BRINGING PAPER STOCK ONTO THE WIRE OF A PAPER-MAKING MACHINE Filed Sept. 30, 1932 Patented Sept. 26, 1933 UNITED STATES METHOD AND APPARATUS FOR BRINGING PAPER STOCK ONTO THE WIRE OF A PAPER-MAKING MACHINE Richard T. Lang,
Germany, assignor to American Voith Contact Company, lnc., New York, N. Y., a corporation of New York Application September 30, 1932, Serial No.
635,628, and in 7 Claims.
The invention relates to an apparatus and a method of bringing paper stock onto the wire of a paper-making machine. The invention has for its object to provide means for the regulation of the stock jet passing onto the wire both as to the direction in which and the place at which the stock jet strikes the wire.
In Fourdrinier machines and pulp-drying machines it is known practice to feed the paper stock onto the wire through a feed orifice having an upper and a bottom lip, the speed at which the stock leaves the orifices, being substantially the same as the speed at which the wire travels. In such practice, the operating speed, and therewith the speed of travel of the wire, require primarily a corresponding change in the level of the paper stock in the head box, while changes in the consistency and in the freeness of the paper stock are primarily corrected by varying the distance between the upper and bottom lip of the discharge orifice of the head box. Such a regulation of the stock level in the head box and an adjustment of the distance between upper and bottom lip of the orifice are not satisfactory in the efiicient operation of such machines.
This invention provides a method and means to change the discharge angle in which the stock jet or current strikes the wire, as also the place at which it strikes the wire. Preferably such change in direction, and change in location of the impact of the jet, is carried out in addition to the regulation of head box level, and the lip adjustment. In accordance with this invention, this is accomplished by so changing the relative position of the jet orifice, which has been adjusted to correspond to a certain working speed and stock consistency, in respect to the breast roll over which the wire travels, by either raising or lowering the head box relative to the breast roll, or moving it closer to or away from the breast roll, or by tipping the head box, or by carrying out one or more of these various actions, until both the angle of impingement and the point at which the stock strikes the wire have been adapted to the then prevailing conditions as to working speed and condition of the stock, and in such a measure as to give the best practical results.
The invention consists in the method of causing the discharge fiow of the stock jet in respect to the breast roll or the wire passing over it, at a definite angle with respect to the wire, varying as required by the prevailing conditions as to working speed and condition of stock, thereby resulting in the impact of the stock jet at such a point on the wire as required. The variation of angu- (lermany October 3, 1931 lar discharge and point of impact of the stock current or jet in respect to the wire and breast roll, is in connection with a jet orifice which has been adjusted to a certain working speed and stock consistency. The invention consists further in the novel apparatus hereinafter described, which consists essentially of a displaceable jet orifice adapted to be raised or lowered, or laterally moved in respect to the breast roll, or tilted in respect thereto, to vary the direction and point of impact of stock flow to the wire.
The invention will be more fully described hereinafter, embodiments shown in the drawing, and finally pointed out in the claims.
In the accompanying drawing,
Figure 1 shows diagrammatically, one position of the stock orifice in respect to the breast roll and wire;
Figure 2, another position of the same;
Figure 3 is a longitudinal section through the head box and orifice of one embodiment of the invention;
Figure 4 shows an end or rear View of the embodiment shown in Figure 3, and more particularly the head box as seen in the direction of the flow of stock; and v Figure 5 shows a section of another embodiment.
Referring to the drawing, and more particularly to Figures 1 and 2, the breast roll E has the wire D passing thereover as is well known.
In relation to this breast roll E and wire D, a stock orifice C, is placed, which is capable of being moved upwardly or downwardly, or horizontally to and fro, or tilted from the position shown. This stock orifice having been adjusted as to working speed and as to condition of stock, directs the stock jet or current flowing out of the orifice against the wire at a certain angle, the median dot-dash line indicating the angle .of flow. The crossing of this line with the wire indicates the point of impact. In Figure 1, one angle of flow and point of impact is shown. In Figure 2 another angle and point of impact is shown. These are diagrammatic representations showing different angles of flow and different impact points, in accordance with the invention therein set forth. Various means may be provided to vary this angle of flow and point of impact in respect to the breast roll and wire. The method consists in causing the stock to flow to the wire at various different angles with correspondingly different localities of impact relative to the axis of the breast roll.
This method is also embodied in a novel structure, as shown in Figures 3 and 4. The known head box A has the known equalizer roll B, and known oriilee C consisting in the embodiment shown of a lower lip C and an adjustable lip C The paper stock as is well known passes from the head box A. through or around the equalizer roll B, and between the lips C C, onto the wire D passing around the breast roll.
The novel features of the embodiment shown in Figures 3 and 4, consist in having the head box supported in such a way that it can be raised or lowered, or laterally displaced in respect to the breast roll, or tilted in respect to the wire. For this purpose, the lower part of the head box A is provided with a yoke-like extension which has arotatable bolt M seated in the lower and .upper parts of the yoke, and passing through a block N secured to a standard G. By applying a rotary movement in one direction to the bolt M, at its exposed head F, the head box is raised, and by applying a rotary movement in the other direction, the head box is lowered. The block N is rotatably pivoted to the standard by means of the pin H extending from the block N into the standard G. A rotary movement of the block N around the axis of the pin u! bolt H, brings about a tilting of the head box in respect to the wire. To move the stock orifice laterally towards and from the breast roll E, the lower part of the standard G is guided in the fixed foundation plate J having a guide I. The standard G has a depending portion 0 which is engaged by a spindle P, which is turned in one or the other direction by an exterior gear Q actuated by another bevel gear R, rotated by a hand wheel S. By operating hand wheel S in one or the other direction, the standard G is moved and hence the stock head box is displaced laterally in respect to the breast roll E.
By moving standard G and with it head box A laterally in the foundation plate I, orifice C can be moved closer to or away from breast roll E in the direction of the flow of stock. By tipping head box A around bolt H in standard G at a right angle to the direction of the flow of stock, the path of discharge of the stock current towards wire D is changed. By raising or lowering head box A relative to standard G both the direction in which and the point at which the stock current strikes the wire can be changed. These operations may be carried out singly or jointly in order to determine the angular path of flow of the stock and its point of impact on the wire. By thus varying the point of impact of the stock stream with respect to the breast roll and its angle of impingement upon the wire in accordance with the speed of movement of the wire and the consistency of the paper stock, excessive disturbance of the stock upon striking the wire is avoided and a web of uniform thickness assured. Therefore, the machine may be operated at maximum speed and a high quality output of various different grades of paper obtained.
Instead of changing the position of the entire head box A relative to breast roll E, it is also possible to change jointly in their relative position to the breast roll, the two orifice lips C and C together with the device for adjusting the orifice opening, as shown in the embodiment illustrated in Figure 5.
The invention 0! this novel method has been shown as applied to the wire of a paper-making machine, and embodiments of the invention of the novel structures have been described and shown. Changes may be made therein without departing from the spirit of the invention, as
defined in the appended claims.
1. An apparatus for feeding paper stock onto the wire of a paper-making machine, consisting of a head box having a discharge orifice, and means for moving said orifice in different directions to divert the flow of stock in different directions with respect to the wire, and to impinge the stock jet at varying points on the wire.
2. An apparatus for feeding paper stock onto the wire of a paper-making machine, consisting of a head box having a discharge orifice, means for moving said orifice in different directions to divert the flow of stock in different directions in respect to the wire, and to impinge the stock jet at varying points on the wire, said orifice being tiltable in respect to the wire, and movable vertically up or down, or laterally to and fro, in respect to the breast roll.
3. The method of feeding paper stock onto the wire of a paper-making machine by means of an orifice with an upper and a bottom lip characterized in that the stock current discharged through the orifice, as regards its horizontal or vertical distance from the wire, or itsdirection, as regards these factors combined, is changed until the direction in which and the point at which said stock current strikes the wire have been adjusted to correspond to the then prevailing conditions as to working speed and condi-.--
tion of stock.
4. Stock feeder head box for paper machines having a discharge orifice formed by an upper and bottom lip, means for moving the head box rotatably around a horizontal axis positioned at a right angle to the direction of the flow of stock, and means for moving the head box vertically and horizontally.
5. Stock feeder for paper machines having a discharge orifice formed by an upper and bottom lip, including means for moving the two orifice lips rotatably around a horizontal axis positioned at a right angle to the direction of flow of stock, and means for moving the same vertically and horizontally.
6. In the operation of paper-making machines, variably positioning the angle of discharge flow of the paper stock relative to the plane of the wire to correspondingly determine the impingement angle and point of impact of the stock upon the wire with respect to the axis of the breast roll, in accordance with the consistency of the stock and the speed of the wire.
7. In stock-feeding apparatus for paper-making machines, a discharge orifice, and means for bodily adjusting said orifice to different angular positions relative to the plane of the papermaking wire to correspondingly determine the angle of discharge flow of the stock and the point of impact of the stock stream upon the wire with respect to the axis of the breast roll.