US1989435A - Method and device in the manufacture of paper - Google Patents

Description

Jan. 29, 1935. WALLQUIST I METHOD AND DEVICE IN THE MANUFACTURE OF PAPER Filed March 19, 1934 A Fig.3

Fig.4

Fig. 5

Patented Jan. 29, 1935 i I t UNITED- STATES PATENTtOFFlCE METHOD AND DEVICE IN THE MANUFAC- TURE OF PAPER- Ivar Wallquist, Gottenborg, Sweden Application March 19, 1934, Serial No. 716,365 In Sweden March 38, 1933 v 2 Claims- (Cl. 92-38) The present invention relates to paper makproduced will adjust themselves so that their ing machines of the Fourdrinier type. It is a longitudinal direction will be substantially paralknown fact that the fibres when flowing out on lel with these currents. the wire will have a tendency to position-them- The device for producing said currents, acselves with their length direction parallel with cording to Figures 2 to 4, comprises one or more the direction of movement of the wire. By such Spr y P pes or the like 30, 3b exten in parallel positioning of the fibres the strength of versely or obliquely above the wire from one side the paper will, of course, be different in different th eo to e o er nd a n ea a O f directionsthereof, fine outlet openings which may. also be formed The invention has for its object to provide by a l n i na fin outletslot with oblique 10 means whereby part of the fibres will adjust thin intermediate Walls guide Plates giving themselves transversely to the direction of movethe medium t b q O fi W dire ti n desired. ment of the pulp, thus increasing the crosswise By Preference, this Outlet Slot is of such a atu e strength of the paper. Another object of the to cause the liquid r'the k tOeOme n invention is to distribute the fibres evenly in the teet w t t e s ee f flbre uspen ion upo th 15 paper, wire in the form of a substantially homogeneous,

In accompanying drawing, Figure 1 shows by thin sheet without interruption.- The discharge means of a parallelogram diagrammatically the Openings are directed obliquely to the Plane of manner of operation of the present device. Figthe Wire in such a manner th the J s d sures 2, 3 and 4 show a fibre distributing device in charged therethroush e in vert cal p a es fo m- 20 plan, side and front view respectively. Figures ing an angle to the direction of movement of the 5 and 6 show in front and plan view a fibre diswire (see Figure The um leaves the i tributing device according to another embodicherige member 3 With the ci y d ction ment of the invention. S. As the direction ofmovement and the veloc- In the drawing, 1 denotes th i l th rum ity of the discharge member in relation to the 25 ning over the breast roller 2 of the Fourdrinier Wire is V, ill the Water UP t Wire ove ents paper making machine and upon which the fibre are caused by h ll Win medium 'With the suspension flows out. The direction of moveresulting Velocity and di e on The fib es in ment of the wire is indicat d by an arrow 1 the range of said movements or currents will reality, the wire-cloth moves, and a member distend to adjust r l y th mselves in the same di- 30 charging an outflowing medium, by which the leetienfibres are distributed, is still, but in relation to one, two more discharge m s 3 ay the wire the discharge member has the direction be arranged If two s m s e p vid d, of movement and the velocity v forming one of their outlet openings m be arra ed so that the components of a parallelogram of movethe medium flowing Out through O mb is 85 ment, the resultant F of which is approximately directed to one side obliquely to the direction, of perpendicular to the direction of movement of movement clithe Wire, and the medium fl W the wire-cloth, and the second component S of out through the other member is di ed to t which is the movement and velocity of outflowing other-side obliquely to h direction of movement water or other liquid, steam or vapour, air or gas of the wire, as shown by Figures 2 and 4. 40 obliquely directed in relation to the direction of In the embodiment oi Figures5 and 6 the dismovement of the wire and causing currents in Charge P pe 3 is p d With a 0! the water intermingled with fibres upon the wirecharge nozzles 4 of such a character that the cloth. The resultant F is the desired direction jet or bunch of jets discharged by each nozzle is 'of movement of said liquid, vapour or gas in resubstantially fan-shaped. Each jet or bunch' of lation to the wire-cloth in motion. As V is asjets strikes against the pulp sheet on the wire sumed to be constant on a certain occasion, F along a line x-y forming an angle to the direccan be varied by varying the direction of movetion of movement of the wire,'the sheets of jets ment and velocity of S. 'lyirk so close together that the whole width of The aim of the invention is to produce currents the pulp sheet will be uniformly and efiiciently in the liquid on the wire with the direction and treated by the discharged medium.

velocity F. Thus, the pulp is treated by the liquid, I do not desire to confine my invention to the vapour or gas on that portion of the wire where fibre distributing device above described but the the fibres still are movable in the water. Those details thereof may be varied within the scope fibres that are influenced by the currents thus of the appended claims.

What I claim is:- 1. A method in the manufacture of paper by a Fourdrinier paper making machine consisting in supplying a mixture of fibres and liquid in the state of a suspenson to the wire of the machine,

. exposing the sheet of fibre suspension on the wire to the action of a flowing medium supplied from an outer source, and giving said medium a so directed movement that in the pulp sheet upon the 10 wire currents are produced in a direction substantially perpendicular to the lengthwise direction of the wire.

2. In combination with a Fourdrinier paper making machine, a device with a row of discharge openings for a flowing medium above the wire, said openings directed obliquely to the upper surface of the wire so that the jets discharged through the openings lie in vertical planes forming angles to the direction of movement of the wire.

IVAR WALLQUIST.

Images