US1657509A

US1657509A - Suction box for paper-making machines

Info

Publication number: US1657509A
Application number: US56592A
Authority: US
Inventors: Fred J Latham
Original assignee: Oxford Paper Co
Current assignee: Oxford Paper Co
Priority date: 1925-09-16
Filing date: 1925-09-16
Publication date: 1928-01-31
Anticipated expiration: 1945-01-31

Description

Jan. 31, 1928.

F. J. LATHAM SUCTION BOX FOR PAPERMAKING MACHINES Filed Sept. 16, 1925 $371M WW guru-W01 @3 l 04 h Patented Jan. 31, 1928.

UNITED STATES PATENT OFFICE.

FRED J. LATEAM, OF RUMFORD, MAINE, ASSIGNOB. TO THE OXFORD P APER COMPANY,

A CORPORATION OF MAINE.

SUCTION BOX FOR PAPER-MAKING MACHINES.

Application filed September 16, 1925. Serial No. 56,592.

My invention relates particularly to sue-- ilOIl boxes used for the removal of the water from paper making machines, and is applicable to paper making machines of various diiierent kinds.

The object of my invention is to provide suction boxes for paper making machines having many advantages over previous types of suction boxes. More particularly, the object is to provide an improved cover for suction boxes, that is to say, an improved construction for the upper portion of the suction boxes, which is adapted to support the Fourdrinier wire carrying the paper 1 web to be dried. Suction boxes made in accordance with my invention have the advantage of wearin off level and smooth and not in ridges un er the Fourdrinier wire supported thereby. In carrying out my invention I may accomplish this urpose by providing suction box covers ma e of pieces of wood of such a character as to wear ofli' smoothly and without the formation of any substantial ridges under the action of the B Fourdrinier wire. Preferably, for this purpose I provide such covers made of wood and in which the grain runs so that the longitudinal rain of the wood extends in a direction cutting through the path of movement of the Foudrinier wire, for example,

vertically, or at right angles to the plane of the Fourdrinier wire. 'These covers may be supported in any desired manner but I prefer to support them in metal supports having appropriate recesses for receiving the same. A further object is to provide covers of this character so as to not only prevent the formation of uneven surfaces on the covers but also so as to prevent the forma- W tion of ridges in the Fourdrinier wire with consequent possibility of dama to the paper web. Again, a further 0 ject is to obviate the necessity of planing off the top of the cover at frequent intervals during the life of a Fourdrinier wire, inasmuch as covers made in accordance with my inven tion need not be planed down except, perhaps, when changing to a new Fourdrinier wire. Accordingly, there is a saving of time and labor in using covers made in accordance with my invention.

Further objects of my invention will appear from the detailed description of the same hereinafter.

While my invention is capable of embodiment in many diiferent forms for the purpose of illustration I have shown only one orm of the same in the accompanying drawings, in which Figure 1 is a diagrammatic side elevation of a paper making machine equipped with suction boxes made in accordance with my mvention;

Figure 2 is a plan view of the same;

Figure 3 is an enlarged vertical section of one of the suction boxes;

Figure 4 is an enlarged vertical section of the same taken at right angles to Figure 3 on line 4-4 therein; and

Fi re 5 is a plan view of one of the suction ox covers. In the drawings I have shown a paper making machine comprisin a stock supply box 1 and a breast-roll 2 For supporting a Fourdrinier wire 3 at one end of the machine. Said wire passes over a plurality of table-rolls 4 and thence over two suction boxes 5 and 6, a supporting-roll 7, then between a supporting-roll 8 and a dandy-roll 9 and thereafter over two

further suction boxes

10 and 11. From this point the wire pas es over a guide-roll 12, a suction-couchroll 13 and thence in the reverse direction in contact with five wire carrying and

stretch rolls

14, 15, 16, 17 and 18. Each of the suction boxes is comprised of a housing 19 provided with a vacuum chamber 20 therein supplied with a vacuum from any suitable source. In the interior of the hous ing there are anv desired number of supporting bridges 21 shaped like an inverted U and adapted to support at their upper portions a number of'suction box covers, each of which is comprised of a metal grooved support 22 having a dovetailed recess 23 therein and secured to the housing 19 and the bridges 21 by means of screws 24. The dovetailed rece s 23 is provided for receiving a plurality of

wooden blocks

25, 26 and 27 arranged end to end so as to extend completely across the Fourdrinier wire 3. These blocks 25. 26 and 27 are mortised together at their ends. as shown in Figure 5, and are so arranged that the longitudinal grain of the same extends in a direction which cuts through, for example, vertically, the plane of the wire 3. Furthermore, as shown in Figure 5, the said blocks of wood are on e upper faces of t 0 said blocks exreferably so arran ed that the grain tends substantially crosswise of the wire. In order to assist in holding the covers in proper positionwith regard to the housing 19, a number of blocks 28 are provided which are secured by bolts 29 to the housing 19, said blocks being located adjacent the side of the bridges 21.

In the operation of my invention, as the wire 3 travels in the direction of the arrow. as shown in Figure 3. the

blocks

25, 26 and 27 will wear evenly and smoothly under the action of the wire, thus preventing channeling and preventing the. formation of ridges in the surfaces of the same. Accordingly, also, the formation of corresponding ridges or unevennesses in the wire will be avoided. Furthermore, loss of time and labor, due to frequent smoothing out any unevennesses in the surfaces of the

blocks

25, 26 and 27, will be avoided inasmuch as it will not be necessary to re-surt'ace said blocks by planing or otherwise except, perhaps, when a new Fourdrinier wire is installed.

While I have described my invention above in detail I wish it to be understood that many changes may be made therein without departing from the spirit of the same.

I claim:

1. In a paper making machine, the combination of a Fourdrinier wire and a suction box having a cover comprising a wooden block having the longitudinal grain of the wood extending in a direction which cuts through the path of the wire, at righthngles thereto, and so arranged that the annual growth rings in the face of the block extends crosswise of the wire.

2. In a paper making machine, the combination of a Fonrdrinier wire and a suction box having a cover comprising a wooden block having the longitudinal grain of the wood extending in a direction which cuts' through the path of the wire, said blockbeing carried in a grooved support set into the face of the block. a

3. In a paper making machine, the combination of a Fourdrinier wire and a suction box having a cover comprising a wooden block havin the longitudinal grain of the wood exten ing in a direction which cuts through the path of the wire and at right angles thereto, said block being carried in a grooved support set into the face of the block.

4. In a paper making machine, .the combination of a Fourdrinier wire and a suction box having a cover comprising a wooden block havin the longitudinal grain of the wood exten 'ng in a direction which cuts through the path of the wire, at right angles thereto, and so arranged that the annual growth rings in the face of the block extends crosswise of the wire, said block being carried in a grooved support at the base of the block.

5. In a paper making machine, the combination of a Fourdrinier wire and a suction box having a cover comprising wooden blocks having the longitudinal grain of the wood extending in a direction which cuts through the path of the wire, said blocks being carried in a dovetailed support, the blocks being inortised together at their ends.

6. In a paper making machine, the combination of a Fonrdrinier wire and a' suction box having a cover comprising wooden blocks having the longitudinal grain of the wood extending in a direction which cuts through the path of the wire and at right an gles thereto, said blocks being carried in a dovetailed support, the blocks being mortised together at their ends.

7.- In a. paper making machine, the comination of a Fourdrinier wire and a suction box having a cover comprising wooden blocks having the longitudinal grain of the wood extending in a direction which cuts through the path of the wire, at right angles thereto, and so arranged that the annual growth rings in the faces of the blocks extends crosswise of the wire, said blocks hei'ng carried in a dovetailed support, the blocks being mortised together at their ends.

'8. In a paper-making machine. the combination of a Fourdrinier wire and a suction box having a cover comprising spaced wooden blocks' placed end to end carried by grooved supports.'

9. In a paper-making machine, the combination of a Fourdrinier wire and a suction box having a cover comprising a plurality of wooden blocks carried by dovetailed supports, said supports being of substantially Ithe same outside width as the block.

10. In aopaper making machine, the coinbination of a Fourdrinier wire and a suction FRED J. LATHAM.