US1549338A - Paper-making machine - Google Patents

Description

Aug. 11, 1925. 7 1,549,338

J. D. TOMPKINE PAPER MAKING MACHI NE Filed April 11, i

Patent Aug. ii, 1e25 JOHN D. TOMJPKINS, F VALATIE, NEW YORK.

PAPER-MAKING MACHINE.

Application filed April 11, 1922. Serial No. 551,575.

To all whom it mayconcem:

Be it known that 1, JOHN D. TOMPKINS, a citizen of the United States, a resident of Valatie, in the county of Columbia and State of New York, have invented a certain new and useful Paper-Making Machine, of which the following is a specification.

The'invention has for an object to facilifate or improve the operation of extracting water from the fibers of a paper web as it passes through a paper making machine, particularly at the time when such fibers are carried by the forming wire, and in such manner that the removal of water or moisture from the fibers will not displace the same from proper position.

Another object of the invention is to utilize the step of removing water or moisture as above mentioned, to assist in causing the web to adhere properly to the felt which is relied upon to carry the web along to parts of the machine which are to perform further operations thereon.

Other objects and advantages of the invention will be in part obvious and in part specifically pointed out in the description hereinafter contained, which, taken in connection with the accompanying drawings, discloses a preferred embodiment thereof; such embodiment, however, is to be considered merely as illustrative of its principle. In the drawings I The single gure is a diagrammatic vertical longitudinal section showlng a paper from the press rolls to the first ro making machine adapted to operate in accordance with the invention.

Referring to the drawing, the particular type of paper making machine illustrated, embodies a paper web forming means, comprising a forming wire 1 running over a plu-.

rality of small rolls 2, and around a lower couch roll 3. The newly formed paper web 4 is carried in the first instance upon form- 7 ing wire 1, and is transferred therefrom to a felt apron 5, in the present instance the upper felt apron, which latter is pressed intoengagement with the paper web 4 by means of an upper couch roll 6; the upper felt apron passes between upper and lower pres rolls 7 and 8 respectively, and as shown also serves to carry the palper web 9 of a series of dryers, by passing around a roller 10 which presses agamst roll 9. A lower felt apron 11 passes over a roller 12 and between press rolls 7 and 8, and thus asthe paper web is fed to the press rolls it is held between the felt aprons 5 and 11. As shown, the lower press roll 8 is of the suction type, and as the pa er web 4 passes over lower to press roll 8, it is also sub'ected to a blast of compressed air supplied y suitable means,

such as a pipe 13 having perforations 14 therein directed toward the pa er web. The suction of roll 8 and the air assist in the operation of extracting water or moisture from the web, and preferably the roll 12 is also made of the suction type, and an air blast employed in connection therewith, as by means of a pipe 15, similar m to the pipe 13 previously described.

The amount of moisture which can be drawn from the aper web when the latter is held between elt aprons, or the rate at which moisture can be withdrawn therefrom, is necessarily limited owing to the fact thatthe felt aprons are not of such open texture as to permit the free and unimpeded passage of the air blast therethrou h. According to the present inven- 834 tion, subject the paper web to the action of an air blast at a time when the web is 4 still carried by the forming wire 1, the meshes or interstices of the forming wire being relatively large or open, and permitting a relatively free passage of the air blast therethrough. As shown, this air blast is supplied by means of a pipe 16, similar to the pipe 13 previously described, the pipe 16 being preferably located underneath and directing the air blast upwardly through the forming wire 1.

I also prefer to subject the paper web to the air blast passing through the forming wire, at a time when the opposite surfaces $5 of the web are adequately supported. The paper fibers may be easily displaced in the stage at which they are carried b p the forming wire, but if supported by t e forming wire on one side, and also properly supported onv the other side, t e. danger is avoided that the air blast might blow the fibers out of position. In the resent instance, the pipe 16, which supp 'es the air last serve to as i web a, W 7

blast as above-mentioned, is positioned beneath the upper couch roll 6, and thus the paper web 4 is supported on its upper side y felt apron 5 to prevent the 8.11 'blast from blowing the fibers out of position, as above-mentioned. Preferably the upper couch roll 6 is of the suction type to cooperate with the air blast pipe in extracting more moisture from the web.

Furthermore, if felt a ron 5 be employed to carry the paper we along from the couch rolls, as is the case with the machine illustrated, the action of the air blast from pipe 16 also makes it more certain that the web will separate from the forming wire and adhere properly to the felt apron when the latter passes away from the forming wire.

In some instances, particularly where the machine is bein used for the manufacture of papers of lig t weight, the extraction of water from the newl formed paper web when carried b the orming wire, in conjunction with t e further ste of removing water from the web and both felt aprons, by means of the suction roll 12 in combination with the air blast issuing from pipe 16, will render unnecessary the use of a lower ress roll 8 of the suction type, thus reducmg the expense of the suction roll and the amount of power consumed in driving this part of the machine. The effect of the dry air blast upon the upper felt apron 5 is to make this felt apron relatively dry, and when the two felt aprons pass between press rolls 7 and 8, the blotting or absorptive properties of the felt aprons are sufficient to take up the necessary amount of water remaining in a paper web of light weight, even though lain press rolls be employed, and the machme run at high speed.

While a s ecific embodiment of the invention has been described, it will be obvious that many changes may be made therein without departing from its princi-' ple, as defined in t e following claims.

I claim: 7

1. The method of making pa er which comprises forming a paper we member having relatively large openings therein, directing an air blast through the openings in said member and on to the web to remove moisture therefrom, and maintaining a supporting surface in engagement with the side of the web opposite to the side which engages the formmg member to prevent the blast from imparting movement to the web as a whole, at the time when the air blast is bein applied thereto, and later removing the we from the forming wire.

2. The method of making pa er which comprises forming a paper we upon a formin wire, maintaining an n per felt apron in contact with the side 0 the webopposite to the side which engages the formupon a ing wire, and passing a blast of air through the forming wire to the paper web while the latter is held between the forming wire and the felt apron.

3. A paper making machine comprising a member having openings therein and adapted to form a web of paper upon its surface, a supporting means for the web adapted to enga e the same on the side thereof opposite rom the forming wire to prevent the blast from imparting movement to the web as a whole, means for projecting an air blast through the forming member and toward said supporting means, said supporting means acting later to remove the web from the forming member.

4. A paper making machine comprising a forming wire, a felt apron passing over the surface of said forming wire, and means disposed beneath said forming wire adapted to project an air blast upwardly through the forming wire, and against said felt apron.

5. Apaper making machine comprising a forming wire, a lower couch roll associated therewith, an upper couch roll located in advance of said lower couch roll, a felt apron passing around said upper couch roll and over said forming wire and lower couch roll, and means disposed beneath the forming wire and said upper couch roll for projecting-an air blast upwardly through the forming wire toward the upper couch roll.

6. The combination set forth in claim 5, wherein said upper couch roll is of the suction type.

7. A paper making machine comprising a couch roll, a forming wire passing over the same, and means located in advance of the couch roll for directing an air blast upwardly through said forming wire from underneath.

8. The method of making paper which comprises forming a paper web upon a member having relatively large openings therein, maintaining an upper felt apron in contact with the exposed side of the web, leading the web between the upper felt apron and a lower felt apron to press rolls, and removing water by passing an air blast through the web while the latter is held between the forming member and the felt apron, and also subjectin the paper web and the upper-and lower felt aprons to an air blast in advance of the ress rolls.

9. The combination set orth in claim 5 together with press rolls, a lower felt apron adapted to cooperate with said upper felt apron to lead the paper web through the press rolls, and means in advance of the press rolls for subjecting both of said felt aprons to an air blast.

10. The method of making aper which comprises forming a paper web, leading a felt apron into contact with one side'of the memes web, extrscting Water from said web and side of said first-mentioned felt apron by applying an air blast m the exposed side 0f the Web, leading the Web between said felt apron and another felt apron. t0 press rolls, and removing further Water from. both of said ebb aprons and Web by applying a, further bless 1110 the exposed apron.

in sestimeny that I claim the have hereunto set my hard this March 1922.

felt apron tewsrd the Web and the remaining felt 31st day of JQHN Do TUMPKINS.

Images