US1120432A

US1120432A - Suction-roll.

Info

Publication number: US1120432A
Application number: US68743012A
Authority: US
Inventors: Charles H Atkins
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-03-30
Filing date: 1912-03-30
Publication date: 1914-12-08
Anticipated expiration: 1931-12-08

Description

G. H. ATKINS.

SUCTION ROLL. APPLICATION FILED mumo, m2.

1,120,432. Patented Dec. 8,1914

PVITNESSES: L VVENTOR,

C kdrles EJ212325 v v BY ATTORNEY.

CHARLES H. ATKINS, 0F SPRINGFIELD, MASSACHUSETTS.

SUCTION-ROLL.

Specification of Letters Patent.

Patented Dec. 8,1914.

Application filed March 30, 1912. Serial No. 687,430.

To all whom, it m ay concern.

Be it known that 1, CHARLES H. Armxs, a citizen of the United States of America, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Suction-Rolls, of which the following is a specification.

This invention relates to revolving suction rolls for paper machines and is related to my co-pending application filed June 24th, 1912, under Serial No. 705,358. It isespecially adapted for use in paper making machines, but can be used in other relations.

The object of this invention is to provide an efiicient means of extracting water from pulp in the manufacture of paper.

Other objects of the invention will appear in the detailed description and annexed claims.

In the drawings forming part of this application,Figure 1 is a longitudinal, sectional view of the suction roll. Fig. 2 is a cross sectional View thereof. Fig. 3 is a section taken on the line 33, of Fig. 2.

Referring to Fig. 1, a central pipe 9 has mounted thereon, for rotation, the hollow and perforated cylinder 9 which is supported on a suction box A that has bearings at each end of the pipe q. This apparatus may be used in a Fourdrinier cylinder, or other paper making machine. When so used the wire or felts, carrying the paper which is to be dried, are led to the rotating cylinder 9 at a point where the wooden block .9 presses against the inner face of the cylinder 9 and the wire or felts rotate with said cylinder for an are equal to the arc of the block 8. This block is supported on a casting t,the latter being supported by :1 diaphragm '0 which is,-in turn, supported by the casting '10 which is mounted on the pipe 5/. In the casting w is a standard a: with an adjustable stop thereon against which a spring y rests. This spring presses against a cross-piece 2 of the casting t and forces the blocksthereby against the inner face of the cylinder 9. The casting 'w has one or more communicating passages a between the space surrounded by the casting to, diaphragm v, casting 2., and wooden block 8 with the pipe 1, as shown in the drawings. The pipe 1 is connected with any suitable form of suction apparatus, in order to obtain a vacuum in the chamber surrounded as above stated.

There are. several of these standards .22 with spr ngs g acting against the cross-pieces 2, as indicated in Fig. 1. \Vhen the wire or ielts rotate with the cylinder 9 through the are above stated, water is abstracted from the paper through the perforations in the cylinder 9' and in the block 8. This water passes along with the accompanying air down through the passages a to the pipe 9, and from thence to any suitable point.

In apparatus of this description, it is most difiicult to obtain the proper pressure of the block 8 against the inner face of the rotating cylinder 9, and where this proper pressure is not obtained, then the vacuum is destroyed to a certain extent and the apparatus rendered ineifectual, for the amount of water drawn from the paper passing over the cylinder will vary, and such variation is most objectionable. In order to obtain the proper pressure of this block 8, a balancing effect is obtained as follows: The 82(- terior area between the supporting points of the diaphragm will be subjected to atmospheric pressure, as is clear from Fig. 9.. This area may be varied as desired, and therefore the pressure may be varied within certain limits. By designing the springs 3 of the proper strength, and by regulating the stops against which the springs 3 rest, as they are mounted on the standards .r, the pressure of the block 8, against the inner face of the cylinder 9 upwardly, may be positively determined. Now, by balancing the pressure downwardly, due to the atmospheric pressure against the diaphragm area, and the pressure upwardly due to the spring, the desired pressure of the block .9 against the face of the cylinder 9 is obtained to a nice degree, and in addition a great ad vantage is present because of the fact that there is no considerable pressure acting in any one direction which tends to distort the parts and throw any adjustment out of order. As shown and described, the pressures are clearly balanced and therefore each one may be made to compensate for the other and-only that amount of pressure which is absolutely necessary to the efficiency of the apparatus needs to be used. In many other machines of this class it has been necessary to overcome a great degree of unnecessary pressure, due tothe difference between the pressure in the suction chamber and the atmospheric pressure.

IVhat I claim, is

1. In a suction roll, a perforated cylinder mounted to revolve, means for supporting said cylinder, a suction box having communication with the perforations in the cylinder, and means for yiel dingly forcing one side of the suction box against the face of the cylinder, and means other than the weight of said box tending to keep the same side of the box away from the face of the cylinder whenever a partial vacuum is obtained in the box.

2. In a suction roll, a perforated cylinder mounted to revolve, a suction box therein having communication with the perforations in the cylinder, yielding means to force one side of the suction box againstthe inner face of the cylinder for frictional contact therewith, said side being yieldingly sup-' ported with means tending .to force the same 'away from frictional contact whenever a the other side subject to the pressure in the suction box.

4:. In a device of the class described, a

perforated suction roll, a' centrally mounted pipe therein, a suction box supported by and communicating with said pipe and the per forations in the cylinder, yielding means to force one side of the box against the inner face of the cylinders, and yielding means to support that side of the box with one surface of said yielding means subject to at mospheric pressure, and the other side to the pressure in the suction box.

5. In a device of the class described, a perforated suction roll mounted to revolve, a suction box therein having an arc-shaped perforated side, yielding meansto force said perforated side against the, inner face of the roll, a suction pipe in said cylinder supporting said box, said box having means subject to atmospheric pressure on one side tending to force its perforated side away from the inner face of the roll, said last named means on its opposite side being subject to the pressure in the box to allow the atmospheric pressure to act.

CHARLES H. ATKINS.

Witnesses FRANKLIN G. NEAL. HARRY W. BOWEN.