US851227A - Fourdrinier machine. - Google Patents

Description

No. 851,227. PATENTED APR. 2a, 1907.

W. EIBEL.

POURDRINIER MACHINE.

APPLIOATION FILED FEB. 28,1907.

UNITED STATES PATENT oEEIcE.

PROCESS COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

Specicatomof- Letters Patent.

FOURDRINlER MACHINE.

Application filed Februa 28,1907. Serial No. 359,709.

To all lwhom t may concern:

Be it known that I, WILLIAM EIBEL, of Rhinelanden' county of Oneida, State of Wisconsin, have invented an Improvement in Fourdrinier Machines, o f which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

In Fourdrinier machines, as heretofore constructed and arranged, the aper stock is constantly fed to the iiow-boX rom which it flows into the stock-reservoir which opens out of the iiow-boX and which extends for a short distance over the breast roll end of the paper-making wire. lThe stock is thendeivered upon the wire, through one or more (usually two) narrow horizontal openings which are provided at the bottom of that end -of the stock-reservoir opposite the flow-box.

The stock is caused to rise in the stock-reservoir to a considerable height and is purturn the better.

posely maintained at a substantial elevation. As a result thestockissues from the narrow horizontal orifice with considerable velocity due to the pressure of the column of stock in the stock-reservoir, commonly called the head. The stock thus forcibly issuing from the orifice causes a violent commotion on the wire, immediately in front of the stock-reservoir, which is very objectionable. Furthermore the weight of the large volume of stock in the stock-reservoir is sufiicient to spring or bend the small rolls which support the wire in front of the breast-roll, and the forcible issuance of the stock from thev stock-reservoir also acts to spring or bend the small rolls which support the wire immediately in front of the stock-reservoir, Such springing or bending of the wire-supporting rolls .at the bottom of the stock-reservoir in front of the breast-roll and also in front of the stockreservoir is objectionable; the truer `they Also, heretofore, the stock, which is fed constantly to the How-box, rises inthe flow-box with considerable commotion andas it iiows into the stock-reservoir it does not maintain a level therein but roduces a 'structand arrange the commotion in said reservoir and t e stock in said reservoir, is consequently 1n a st ate of great agitation resembling violent boiling.'

This invention has for its object to conow-box and stockrear wall. g

reservoir and its delivery orifice of a Fourdrinier machine in such manner that the stock will rise evenly and uniformly in the flow-box and will flow into and along the stock-reservoir with little commotion, in, a shallow stream maintaining a smooth'and substantially constant surface, and will be delivered upon the wire with little or no commotion immediately in front of the stockreservoir, thereby permitting the fibres and other paper forming ingredients to begin to Asettle on the wire immediately, resulting in improving the formation of the paper on the wire and also in obviating springing or bend ing the small wire-supporting rolls in front of the stock-reservoir and, at the bottom of the-stock-reservoir. v

Figure 1 shows in vertical longitudinal section the flow-box and stock-reservoir embodying my invention and a portion of the paper-making wire. Fig. 2 is a plan view of the How-box and stock-reservoir and paper-making wire shown in Fig. l. Fig. 3 1S a l detail, showing in front elevation a portion of the stock-reservoir.

a represents paper-making wire; which is downwardly inclined according to my Patent No.' 845,224 dated Feb..26, 1907; b the breast-roll; d the small tubular rolls which support thel papermaking wire between the breast-roll and the guide roll, the latter not being herein shown.

e represents the flexible apron which is attached to the apron board e', and which eX- tends over said board and over the end portion of the wire at the breast-roll, terminating at a point'close to or beneath the slicer The said apron forms the bottom ofthe stoc reservoir and the Slicer f one end thereof,

Patented April 23, 1907.

the usual Fourdrinier wire or tend m the slicer to the'iiow-box.

The apron board e is attached to the front wall of the flow-box at the top.

The flow-box comprises the front wall g, side walls g2, g2, and contains within it several partition walls, three being herein shown, as g3, g4, g5, which divide the flow-box into four vertical compartments.

The stock first enters the compartment formed between the rear wall g and the partition wall g3, it flowing over the top of. said rear wall g into said' compartment, and said4 partition wally g3 is so placed in the flow box IOO .tion wall g4 is so placed in the llow-box and made of such dimensions as to provide a passage above it for the stock into the compart- 'and the front wall g of the flow-box.

ment which is formed between the partition walls g1 and g5, and s aid partition wall gi is so placed in the flow-box and made of such dimensions as t provide an opening beneath it for the passage of the stock into thecompartment formed between the partition wall g5 The several compartments are made of dilerent widths. to provide for an increase in the volume of stock, as for instance, each successive compartment is madewider than the preceding one. An outlet is provided for each compartment, except the last one of the series, and in operation said outlets are closed. They are provided for the purpose of cleaning out the box, when the machine is at rest,

although the outlet of the rst compartment' ofthe series may be connected by a pipe with thepump.

' By providing a series of compartments, as herein shown, the stock becomes more uniformly and thoroughly mixed, which is particularly desirable if additional water is supplied while it passes through the flow-box. Near the top of the last compartment of the series, .as for instance, between the partition wall g5 and the front wall g, a perforated plate is placed, which is arranged obliquely to a horizontal plane and the stock passes up through the perforations in said plate. By means ofthe several partition walls which divert the flow of stock and the perforated plate the stock rises in the lastI compartment of the series with little commotion and is quite free from bubbles, so that it will low into Iand along the stock-reservoir in a shallow stream evenly and uniformly and will maintain a substantially constant level therein.

It is not herein intended that the stock shall accumulate in the stock-reservoir, to produce ahead, and to provide for thus controlling the volume of stock in the stock-res ervoir the horizontal opening at the bottom of the stock-reservoir, the flow-box, ismade very large -to thereby permit the stock to escape as fast as it enters the stock-reservoir, only holding back suliicient stock in the reservoir to maintain the lower edge of the slicer in constant engagement with the stock and prevent the escape of froth and bubbles in4 excessive amounts.

at that end opposite With my improved flow-box 'and the ma chine otherwise arranged according to In present invention the surface ol' the stream of stock llowing through the reservoir will be so smooth and so regular in depth that the slicerwill need to penetrate but-very slightly below its top level. The slicer should `never be lowered more than is necessary to accomplish this result.

If the slieer should be lowered the stock will accumulate inthe stock-reservoir and produce a head, and if the slicer should be raised its engagement with the stock will be broken. By thus constructing and arranging the flow-box and Slicer the objects of'my invention are accomplished, viz., the stock rises in the flow-box without commotion, is delivered tothe stock-reservoir evenly and uniformly, and is then delivered upon the wire in front of the stock-reservoir with little or no commotion on the wire whatsoever, andthe small wire-supporting rolls at the bottom of the stock-reservoir, infront of the breast-roll, and also in front of the stock? reservoir will not be sprung or bent.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. A Fourdrinier machine having a downwardly moving paper-making wire and a stock-reservoir with itswslicer disposed with its lower edge just below the top level of the stock flowing through said reservoir, substantially asA .lescribed.

2. A Fourdrinier machine having a flowbox in open communication with the stock- A reservoir and a perforated plate obliquely arranged in one of its compartments, substantially as described. r

3. A Fourdrinier machine-having a flowbox in open communication with the stockreservoir comprisingl a plurality of compartments, alternately arranged in open communication with each other at thetop and bot- IOO tom, a perforated plate obliquely arranged in 'one ofA said compartments and a downwardly moving paper-making Wire and a slicer disposed with its lower edge just below the top level of the stock flowing throughthe reservoir, substantially as described.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

WILLIAM EIBEL.

ITO

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