US1964291A - Paper machinery - Google Patents

Description

June 26, 1934. H, KUTTER 1,964,291

PAPER MACHINERY Filed April 8, 1933 Patented June 26, 1934 UNITED STATES PATENT OFFICE The a corporation of Ohio Black-Olawson Company, Hamilton, Ohio,

ApplloationAprll 8, 1988, Serial No. 605,115

10 Claims. (CI. 92-43) This invention relates to paper making me.- chinery and more particularly to the rotating cylinder mold type of machine.

One object the invention is the provision o a a cylinder mold paper making machine in which the stock inlet chamber, from which the stock is supplied over a dam to the vat, is arranged to provide an even level flow of stock over the dam, without requiring the use of adjustable wing boards or the like such as have ordinarily been -.used to compensate for variations of the stock surisce from the level line.

Another object oi the invention is the provision of a stock vat of a cylinder mold machine having a stock inlet chamber and a dam over which the stock flows from the chamber to the downwardly moving side at the screen, the dam providing a flat non-adjustable leveling surface of substantial width which gradually decreases the vertical thickness oi the streamof stock flowing into the vat, the amount of flow over the dam being controlled by an adjustable overflow wall provided at the opposite end of the vat from said dam.

Another object of the invention resides in the method or Xeeding the stock in a level stream to the vat of a cylindermold machine by changing 'the direction of'the flow of stock at the proper points and by changing the speed of flow at a so plurality oi-points whereby a level stream of stock is supplied to the vat without requiring the use of adjustable wing boards or the like.

Other objects and advantages of the invention will be apparent from the following description,

as the appended claims and the accompanying drawing. in which v Fig. l is a-central vertical section taken through a cylinder mold machine embodying the present invention: and

40 Figxflisanend elevationthereot.

The invention as herein shown and described. is applied to a rotating cylinder mold type of machine for making paper or the like, embodying essentially a rotatable screen cylinder 10.

it ends. stockvat 11 within whichthescreen isrotatable, paper pulp stock or the like being snipplied from a stock inlet chamber 12 to the stock vat. Some of the white water is withdrawn as it passes through the screen and is carried off, so leaving a layer of stock fibers on the screen. In such a device it has been the practice, in an attempt to provide a proper surface of the stock supplied-to the vat (or even formation or the formed sheet, touse adjustable wing boards on E6 the partition or dam over. which the stock iiows to the mold. These wing boards are usually pivoted to the longitudinal center oi the vat and arranged so that they can be raised or lowered at their outer ends in order to make the stock level a little higher or lower in the middle, or no higher or lower at one side or the other to provide the iormation desired. They must be adjusted frequently as the stock overflows at greater or lesser heights, and to provide the exact adjustment required for any particular oircume5 stances is a very tedious and unsatisfactory pr'o- In accordance with the present invention, however, no adjustable wing boards are required, the stock flow being straightened and leveled by a simple system of passages and its flow over a fixed flat dam of substantial width. The stock, as shown in the drawing, is supplied to the stock inlet chamber 12 in a substantially horizontal direction through the inlet passage 13 which leads horizontally into an up-flaring receptacle 14 having a length at its upper end corresponding to the -total length of the main portion of the chamber 12, which corresponds also to the total length of the stock vat. As the stock flows into the receptaele 14 its direction of movement is changed from horizontal to vertical, and concomitantly the stream of stock is spread out over the full length oithe chamber 12 so that the stock rises upwardly through the chamber 12 with approxi- 86 mately thesame velocity at any point throughout the length of the chamber.

Between the upper and lower portions oi the chamber 12, the latter is restricted by means of the walls 16 and 16 inclined outwardly toward 90 the wall 17, the wall 15 causing a gradual increase of the vertical speed oi flow which results in'straightening out the iiow and assists in equalizing the upward speed at all points throughout the length oi the chamber. The wall 16 provides as for a subsequent gradual deorease'in speed after the stock passes the point 18 oi maximum rcstrlction. The stock flowing upwardly from the restricted portion then passes over the dam 20. the direction 0! its movement being changed from an upward direction to a horizontal direction. resulting again in a further tendency to exactly level the top surface oi the stock as it enters the spacefll provided between the screen 10 and the curved wh n of the vat. "The dam so is of ms considerable width as shown in Fig. 1 and of comseextends the full length otthe cylinder mold. 'I'heuppersuriaceotthedamisflatand smooth. Preferably this flat surface is inclined upwardly with a gradual slope towards the tonning screen. As the stock flows from the upper portion of the chamber 12 over the flat nonadiustable dam surface the stock is evened up in its flow, passing onto the cylinder mold perfectly smooth and without any contrary currents that might aiiect the thickness of the sheet at a particular point or points.

The stock, after passing over the dam, flows into the space 21 between the vat walls and the forming screen. While the invention herein set forth is applicable to a forming screen that moves upwardly adjacent the dam, as herein shown, the apparatus is so arranged that the screen moves downwardly and the stock flows through the space 21 and over an overflow dam that is provided at the end of the vat opposite the dam 20. The overflow dam may be an adjustable wall 24 the top of which is a suitable distance below the normal level of the stock at that point so that a flow of stock takes place continuously around the cylinder mold and in the same direction the screen itself is moving. The speed of stock flow through the vat on the outer side of the forming screen may be substantially the same as the speed of movement of the screen, this result being attained by gradually decreasing the distance between the wall 22 and the screen 10 from the inlet to the outlet of the vat in accordance with the amount of white water taken out through the forming screen. This provides for proper matting of the fibers as they are applied to the outer surface of the forming screen.

The overflow wall 24 is adjusted vertically by means of a rotatable wheel 25 or the like havin an operating connection to a vertical movable carrying member 26 to which the wall 24 is attached. As the handwheel 25 is rotated the vertical position of the overflow wall 24 is controlled to provide a. flow that will be suitable for the particular kind of stock, the speed of the screen, and other factors involved.

The stock flowing over the wall 24 passes into a compartment 28 extending preferably the full length of the vat end, from which the stock is withdrawn by an outlet passage 29 so that it may be again recirculated after being brought to the proper consistency.

The white water is withdrawn from the interior of the cylinder mold through the ends of the cylinder, the liquid so taken off being conducted from the two separate side chambers through a passage 31 having a take-on pipe as connected directly to a middle portion thereof. The two side chambers extend preferably along the entire side of the machine and are, of course, pontioned from the end compartment 28. Some-o1 the white water may pass over the adjustable overhow partition 34 into a separate compartment at an end of one of the side chambers 80 and be wastedthroughthewastewaterdrain33,while the water taken off through the pipe 82 may be supplied to the vat pump to be used again. The

81 is provided in the space available below the dam 20 and between the walls 15 and 16 of the stock supply, chamber on the one side and the wall 220! the vat on the other side. As the dam 20 is of quite considerable width, this leaves a space available below it of considerable size suitable for the positioning of the white water tame-oi! passage referred to.

The entire vat is preferably made entirely of metal, the dam JO-being made ing planed perfectly true and having lower end portions 85 adapted for cooperation with the supporting members on which it rests. As the walls as a bronze castof the stock inlet chamber including the various flow straightening and leveling walls previously described are all made of metal, they will remain smooth to provide for satisfactory operation over long periods of time.

While the method herein described, and the form of apparatus for carrying this method into eiiect, constitute preferred embodiments of the invention, it is to be understood that the invention is not limited to this precise method and form of apparatus, and that changes may bemade in either without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. A paper making machine of the character described comprising a stock vat, a forming screen rotatable in said vat, a stock inlet chamber extending the length of said screen at one end of the vat, and a dam having a top surface devoid of obstructions throughout the length of the forming screen and over which the stock flows from said chamber to said screen, said top surface being hat, of substantial width, and inclined slightly upwardly ing a fixed surface for leveling the flow of stock to the vat.

2. A paper making machine of the character described comprising a stock vat, a forming screen rotatable in said vat, a stock inlet chamber extending the length of said screen at one end of the vat, a dam over which the stock-flows from said chamber to saidvat, said dam having a flat upper surface of substantial width providing a non-adjustable leveling surface for leveling the flow of stock to the vat, means to withdraw water from the interior of the screen, an adjustable stock overflow wall at the opposite end of said vat from said dam, and means for regulating the height of said well for controlling the amount of flow over said dam.

8. A paper making machine of the character described comprising a stock vat, a'forming screen rotatable in said vat, a stock inlet chamber extending the length of said screen at one end of the vat, a dam having a nonadjustable top surface devoid of obstructions throughout the length of the forming screen and over which the stock flows from said chamber to said screen, said top surface being flat, of substantial width,' and inclined slightly upwardly toward the screen and providing a fixed surface for leveling the flow of stock to the vat, and a stock vertically adjustable overflow wall at the other end of said vat opposite said dam for determining the amount of flow over said dam.

'4. A paper making machine of the character described comprising a stool: vat. a forming screen rotatableinsaidvat, a stock inlet chamber extending the length of said screen at one end of the vet, a dam over which the stock flows from said chamber to said vat, said dam having a flat upper surface of substantial width inclined slightly upwardly toward the screen and providing a nonadjustable leveling surface for leveling the flow of stock to the vat, means to withdraw water from the interior of the screen, an adjustable stock overflow wall at the opposite end 'of said vat from said dam, and means for regulating the height of said wall for controlling the amount of flow ovel said dam.

5. A paper making machine of the charactel described comprising a stock vat, a forming screer rotatable in said vat, a stock inlet chamber extending the length of said screen at one end 01 toward the screen and providthe vat, said chamber having an inlet passage at its lower end through which the stock is received in a substantially horizontal direction, the chamber extending upwardly from said inlet passage and having a part between its upper and lower portions which is restricted in width but of the full length of the screen for increasing and straightening the stock flow through said part, a dam over which the stock flows from the upper portion of said chamber to said screen, said dam having a flat upper surface of substantial width providing a non-adjustable surface for leveling the flow of stock to the vat.

6. A paper making machine of the character described comprising a stock vat, a forming screen cylinder rotatable in said vat and so spaced from the walls of the vat as to provide a substantially uniform speed of stock flow along the outer side of the cylinder, a stock inlet chamber extending the length of said cylinder at one end of the vat, said chamber extending upwardly from a stock inlet passage at its lower end and having a restriction in width between its upper and lower ends for increasing and straightening the stock flow, a dam over which the stock flows from said chamber to a downwardly moving side of the screen cylinder, said dam having a non-adjustable flat upper surface of substantial width and providing a fixed leveling surface for leveling the flow of stock to the vat, and an adjustable overflow wall at the opposite end of said vat from said dam and provided below the normal stock level at that portion of the vat.

7. A paper making machine of the character described, comprising a stock vat, a forming screen rotatable in said vat, a stock inlet cham ber extending the length of said screen at one end of the vat, said chamber having an inlet passage at its lower end through which the stock is received in a substantially horizontal direction, the chamber extending upwardly from said inlet passage and having a part between its upper and lower portions which is restricted in width but of the full length of the screen for increasing and straightening the stock flow through said part, a dam having a flat upper surface of substantial width over which the stock flows from the upper portion of said chamber to said vat, and a stock overflow at the end of said vat opposite said dam.

8. A paper making machine of the character described comprising a stock vat, a forming screen rotatable in said vat, a stock inlet chamber extending the length of said screen at one end of the vat and spaced a considerable distance from the downwardly moving side of the screen to provide space between the screen and the chamber for a stock passage, a stock passage in said space for withdrawing white water from the inside of the screen, a dam provided above said passage and forming a flat non-adjustable surface of considerable width inclined slightly upwardly toward the screen and providing a leveling surface over which the stock flows from said chamber to the downwardly moving side of the screen, and an adjustable stock overflow wall at the end of said vat opposite said dam.

9. The method of supplying pulp stock to a cylinder mold vat comprising feeding the stock horizontally, changing the direction to an upfiow, restricting the up-flow to increase and straighten the stock flow, changing the direction to a horizontal flow and leveling and gradually reducing the vertical thickness of the stream just before it enters the vat.

10. The method of supplying pulp stock to a cylinder mold vat comprising feeding the stock horizontally, spreading the stream out to the full width of the vat and concomitantly changing the direction of flow to an upward direction, restricting the up-flow gradually to increase and straighten the flow of stock, again reducing the speed of the up-flowing stream, changing the direction again to a horizontal flow, and leveling and reducing the vertical thickness of the stream just before it enters the vat.

HERMAN L. KUTI'ER.

CERTIFICATE OF CORRECTION.

Patent No. 1,964. 291.

June 26, 1934.

HERMAN L. KUTTER.

It is hereby certified [bit error appears in the printed specification of the above numbered paicnl requiring correction as follows: 3, strike out the Word."stock" second occurrence,

Page 2, line 128, claim and insert the same after "adjustable" in same line; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of lhe case in the Patent Office.

(Seal) Leslie Frazer Acting Commissioner of Patents.

the vat, said chamber having an inlet passage at its lower end through which the stock is received in a substantially horizontal direction, the chamber extending upwardly from said inlet passage and having a part between its upper and lower portions which is restricted in width but of the full length of the screen for increasing and straightening the stock flow through said part, a dam over which the stock flows from the upper portion of said chamber to said screen, said dam having a flat upper surface of substantial width providing a non-adjustable surface for leveling the flow of stock to the vat.

6. A paper making machine of the character described comprising a stock vat, a forming screen cylinder rotatable in said vat and so spaced from the walls of the vat as to provide a substantially uniform speed of stock flow along the outer side of the cylinder, a stock inlet chamber extending the length of said cylinder at one end of the vat, said chamber extending upwardly from a stock inlet passage at its lower end and having a restriction in width between its upper and lower ends for increasing and straightening the stock flow, a dam over which the stock flows from said chamber to a downwardly moving side of the screen cylinder, said dam having a non-adjustable flat upper surface of substantial width and providing a fixed leveling surface for leveling the flow of stock to the vat, and an adjustable overflow wall at the opposite end of said vat from said dam and provided below the normal stock level at that portion of the vat.

7. A paper making machine of the character described, comprising a stock vat, a forming screen rotatable in said vat, a stock inlet cham ber extending the length of said screen at one end of the vat, said chamber having an inlet passage at its lower end through which the stock is received in a substantially horizontal direction, the chamber extending upwardly from said inlet passage and having a part between its upper and lower portions which is restricted in width but of the full length of the screen for increasing and straightening the stock flow through said part, a dam having a flat upper surface of substantial width over which the stock flows from the upper portion of said chamber to said vat, and a stock overflow at the end of said vat opposite said dam.

8. A paper making machine of the character described comprising a stock vat, a forming screen rotatable in said vat, a stock inlet chamber extending the length of said screen at one end of the vat and spaced a considerable distance from the downwardly moving side of the screen to provide space between the screen and the chamber for a stock passage, a stock passage in said space for withdrawing white water from the inside of the screen, a dam provided above said passage and forming a flat non-adjustable surface of considerable width inclined slightly upwardly toward the screen and providing a leveling surface over which the stock flows from said chamber to the downwardly moving side of the screen, and an adjustable stock overflow wall at the end of said vat opposite said dam.

9. The method of supplying pulp stock to a cylinder mold vat comprising feeding the stock horizontally, changing the direction to an upfiow, restricting the up-flow to increase and straighten the stock flow, changing the direction to a horizontal flow and leveling and gradually reducing the vertical thickness of the stream just before it enters the vat.

10. The method of supplying pulp stock to a cylinder mold vat comprising feeding the stock horizontally, spreading the stream out to the full width of the vat and concomitantly changing the direction of flow to an upward direction, restricting the up-flow gradually to increase and straighten the flow of stock, again reducing the speed of the up-flowing stream, changing the direction again to a horizontal flow, and leveling and reducing the vertical thickness of the stream just before it enters the vat.

HERMAN L. KUTI'ER.

CERTIFICATE OF CORRECTION.

Patent No. 1,964. 291.

June 26, 1934.

HERMAN L. KUTTER.

It is hereby certified [bit error appears in the printed specification of the above numbered paicnl requiring correction as follows: 3, strike out the Word."stock" second occurrence,

Page 2, line 128, claim and insert the same after "adjustable" in same line; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of lhe case in the Patent Office.

(Seal) Leslie Frazer Acting Commissioner of Patents.

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