Патент USA US2116763код для вставки
May 10, 1938. H, L, KUTTER 2,116,763 PAPER MAKING MACHINE Filed July 16, 1905 2 Sheets-Sheet 1 ,,' v. .-%\a \ ma?a s\ ka‘, . a . .I1UH I \HU . |1 ‘iw.-|:,»i-a a A“ - Mm" ".0". K, 3. \ __ \ ?u .. . .__ ?WnH "NHU.- WU \\\\ W». L". /. I'Ml: _ . 3a.V.rwhwv \mm 1 no .May 10,1938. H. L. KUTTER ‘2,116,763 PAPER MAKING MACHINE‘ Flled July 16, 1935 2 Sheets-Sheet. 2 L1 . ilQr > 3.. a, mm , I.. MM'QM Patented May 10, 1938 2,116,763 UNITED STATES ‘PATENT orrlcs 2,116,763 PAPER MAKING MACHINE Herman L. Kutter, Hamilton, Ohio, assignor to The Blaek-Olawson Company, Hamilton, Ohio, a corporation oi’ Ohio Application July 1c, 1935, Serial No. 31,641 6 Claims. (CI. 92-43) This invention relates to paper ‘making appa ratus. . One object of the invention is the provision of a paper pulp stock tank, or mix box, having pro $1 vision for thoroughly intermixing the stock sup plied thereto and providing uniformity of the product which is supplied to the stuff pipe which carries the stock to a paper forming screen or The mix box is supplied with paper pulp stock through a suitable supply pipe 25, and is adapted to thoroughly mix the comparatively thick pulp stock received through the pipe 25 and the white water which is returned through the pipe 22, and 5 for supplying the mixed stock to the‘ supply pipe l3. In the usual mix box construction that has been previously used, the stock ?ows from the top of the mix box direct to the outlet pipe. In 10 the like. Another object of the invention is the provision 10 of a mix box having baf?e means which give doing so the stock velocity increases as it ?ows abrupt changes in direction of ?ow of the pulp stock in its passagethrough the mixbox, and downwardly and the stock carries with it consid erable air which cannot be eliminated due to the which is so arranged as to withdraw the air from increasing speed of ?ow of the stock. Further more, in the usual form of mix box, there has 15 been considerable trouble because of poor dis tribution of the stock and white water. The re sult has been that the sheet does not form level the stock before the stock travels to the stuff pipe. Another object of the invention is the provision of a mix box having an air collector provided at a low point and adjacent the end of'the stud’ pipe or outlet passage, the air collector being so arranged as to cause a stock flow approximately 2 horizontally as the stock moves to the stuff pipe, air in the stockwhich causes considerable com ‘ so that air is extracted. 25 Other objects and advantages of the invention will be apparent from the following description, the appended claims and the accompanying ‘drawings, in which—-‘ - Fig. 1 is a top plan view of a paper making apparatus embodying the present invention; Fig. 2 is an end elevation of the apparatus 30 shown in Fig. 1; and Fig. 3 is a side elevation of the paper making apparatus. in the vat, due in part to the incomplete mixing of the white water and the thicker stock supplied 20 to the mix box, and also due to the'presence of - motion in the cylinder mold. The air bubbles present in the stock at the time, the stock is de posited on the forming screen will produce an 25 unevensurface of the formed sheet, as the air bubbles act as though miniature explosions were occurring in the stock while the ?bers are being deposited. And if the vat is'not properly ar ranged the commotion produced by the air in the 30 stock will be su?lciently violent to throw or spat ter some of the stock all the way up to the sheet Referring more particularly to the drawings, ‘ on the bottom side of the felt asthe stock rises ' ‘ 35 Ill generally represents a cylinder mold, of any suitable construction, and preferably embodying a rotatable forming screen ll arranged so that its greater portion is submerged in paper pulp stock contained in the vat l2. The stock flows to the vat through a supply passage or stu? pipe 40 I! which leads to a feed hopper I‘ provided under the vat, in communication at its larger end with the stock supply compartment IS. The stock ' flows from the compartment l5, which has a width substantially corresponding to the length of the '45 forming screen, over a dam. i6 and then into the vat proper, the paper pulp being deposited on the rotatable forming screen, and the white wa ter, which ?ows into the screen, being collected in the white water chambers l'l, communicating 50 with one another by means of pipe It. The white water is returned through pipe I! and pump 20, driven by motor 2|, and passes through the pipe 22 and then back to the mix box which is designated generally ‘ by the reference nu 56 meral 24. in the supply compartment 15. In accordance with the present‘ invention the 35 mix box is so arranged as to effectively intermix the white water and the thicker stock supplied to it, and also arranged to withdraw air from the stock before the stock passes into the stud‘ pipe it. As shown in Figs. 2 and 3, the mix box pref 40 erably comprises a chamber having a plurality of ballles 21 and 28 which effectively divide the mix box into a receiving compartment 29, an inter mediate compartment 30 and a supply compart ment 3!. Compartments 29 and 30 are in com 45 munication with one another at a low point, and compartments 30 and II communicate with one another near their upper ends so that the stock is compelled to ?ow downwardly through the compartment 29, upwardly through compartment 30 and downwardly through compartment 3|. The abrupt changes in direction of the stock ?ow, and especially at the point where the stock ?ows over the partition 28, provides for the re 2 9,113,763 lease of some contained air, and is also e?ective ‘in intermixing the stock. not limited to this precise form of apparatus, and that changes may be made therein without de To provide for more effective discharge of air ‘ parting from the scope of the invention which is and more effective intermixing of the stock, the defined in the appended claims. mix box is provided, just above the discharge What is claimed is: r ' ' opening 33, with a wall or partition 34, serving 1. In paper making apparatus, a mix box for as an air collector and also serving, as will be paper pulp stock comprising a receiving compart later described, to divide the flow from the main ment, an intermediate compartment communi body of stock in the mix box into a number of diil'erent rapidly moving streams ?owing towards one another and intersecting and striking one cating at a low point with a low point of said re ceiving compartment, and a supply compartment 10 communicating at its upper end with an upper another to provide for thorough intermixlng of portion of said intermediate compartment, and a stock. It is preferably dome-like in shap'e, hav stuif pipe for supplying the stock tow a forming ing its lower side open and spaced some little screen, said stuif pipe extending from the lower 15 distance above the bottom of the mix box by arms end of said supply compartment, and an air with or brackets 35 which support the dome in place. drawal device in said mix box adjacent the end 15 Extending upwardly from the top of the air col of said stuff pipe. ’ lector 34 is a vent pipe 31, placing the space just 2. In paper making apparatus, a mix box, a below the dome 34 in communication with the forming screen, and a stuff pipe extending from outside air at a point above the stock level 33. At said mix box for supplying paper pulp stock to the top of the pipe 31 there is preferably an 'in- ' the forming screen, said mix box having baille dicating means\to show the operator that the de means producing an abrupt change in the direc vice is in Operating condition and that the air tion of ?ow and providing for downward move- is being eliminated. Such a device may comprise ment of the stock toward the stuff pipe, and a light ball 33 placed at the top of the pipe 31, means at a low point in the mix box for collect and su?lciently light in weight to be displaced ing air from the stock as the stock travels to by the air ?owing up through the pipe 31. ward the stu?' pipe. The air collector or dome 34 operates to de?ect 3. In paper making apparatus, a mix box for the stock which moves downwardly in the com paper pulp stock, said mix box having a stuff pipe 30 partment 3i of the mix box, so that the stock is extending from a low point thereof, and an air caused to move out toward the walls of the mix collector having its lower side open and located box, the ?ow then changing abruptly in direc adjacent to and above the stuff pipe end but well tion and passing under the dome 34 in an approx below the stock level in the mix box, and means imately horizontal direction as it ?ows inwardly venting said air collector for the discharge of air 35 toward the center of the opening 33 from all di therefrom. . 35 rections. This action produces a very thorough 4. In-paper making apparatus, a stuif pipe, a intermixing of the stock so as to supply a uni mix box for supplying paper pulp stock to said form product to the stuff pipe l3. As the stock stu?’ pipe, means for supplying paper pulp stock ?ows toward the center of thetmix box outlet 33, to said mix box, means for returning white water -40 there is a liberation and collection of air just be to the mix box, and means in said mix box for 1 fore the stockv flows into the stuff pipe, the air collecting and eliminating air from the stock be 40 being eliminated through the air pipe 31, pro low the stock level and just before the stock ducing a bobbingmovement of the ball 39 which passes into the stu? pipe. ‘ ' 'thus gives an indication to the operator that the 5. In paper making apparatus, a mix box for device is properly functioning. paper pulp stock, said box having an outlet pas The air pipe 31 is preferably employed in con sage at a bottom portion thereof, and means junction with the wall 34, so as to provide for closely adjacent said outlet opening forming a the removal of air that is liberated at a point ba?le for abruptly changing the direction of stock just below the wall 34 where the stock is in ?ow just preceding the entrance of the stock into 50 stantaneously almost at rest before starting its the opening, said baille having a downwardly fac 50 downward travel into the stuff pipe I 3. How ing chamber providing for the withdrawal of air ever, even if the air pipe 31 were not present, from the stock at that point. the wall 34 would be effective in giving a very 6. In paper making apparatus, a mix box for thorough intermixlng of the stock because it paper pulp stock, said box having a discharge 55 serves to divide the main body of stock just above opening and having baiile means for abruptly 55 it 'into- what may be considered a great number changing the direction of ?ow of stock through of streams ?owing radially towards one another the mix box and providing for downward ?ow in all directions just below the wall 34 and just of stock toward the discharge opening, an air before entering the stu?f pipe i3. These inter collecting chamber having a downwardly facing secting streams serve to prevent or interrupt any air inlet opening adapted to receive air from the possible strati?cation and breakup the ?owing stock and located near the bottom of the mix box 60 stock and provide for thorough intermixing of and in the path of movement of the stock ?ow diiferent portions with one another. ' ing downwardly'and toward the discharge open While the form of apparatus herein described ing, and means for relieving air from said cham 65 constitutes a preferred embodiment of the inven ‘ ber. 65 tion, it is to'be understood that the invention is nnawm _L. Korma.