US417546A

US417546A - Francis asbury cusiiman

Info

Publication number: US417546A
Authority: US
Publication date: 1889-12-17
Anticipated expiration: 1906-12-17

Description

i (NO MOdGL) F. A. Y PAPER MAKING MAGgINE. l\Io.1117,546. Patented Dec. 17, 1889.

WIJVE'SSES INTO@ FRANois nsnnr oUsuM'nN, or PLYMOUTH, NEWFHHAMPSH'IRE'" PAPER-MAKING MACHINE.,

SPECIFICATION forming part of Letters Patent No. 417,546, dated December 17, l1889.

Application filed January Z1, 1889. Serial No. 297,012. (No model.) i

To a/ZZ whom it may concern:

Be it known that I, FRANCIS AsBURY CUSH- MAN, a citizen of the United States, residing at Plymouth, in the county of Grafton and State of New Hampshire, have in vented certain new and useful Improvements in Paper-Making Machines; and I do declare the following to be a full, clear, and exact description of the invention, ysuch as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which form a part of this specification.

The object of my invention is to dispense with a felt entirely and take the pulp directly off from the wire apron, as shown, after which it is transferred to the lower press-roll.

A further object is to remove as much as possible of the water from the pulp before it reaches the suction-roll shown,and by means f ofa revolving brush located below the wire apron. i

My invention will be described below, and pointed out in the claims;

The drawing shows a perspective view of a papermaking machine constructed in accordance with my invention, parts being broken and no frame-work being shown except a portion in connection with the pressrolls.

Like letters refer to like parts.

-In a machine constructed in accordance with my invention the usual tube-rolls, the tube-rollframe, the suction-boxes, and the dandy-roll are not necessary and are omitted,

the machine as far as the first press-rol1s con- .line fr Ir, so as to give the water a chance to leave the pulp somewhat before the latter comes upon the apron.

D and E are the apron-supporting rolls, and C is the wire apron, which may be of the`de sired width. Where the apron is several feet long, I may employ supporting-rolls a a.

In order to further remove the water from the passing pulp which has not already passed through the meshes of the apron, I arrange a" revolving brush J below said apron, giving the brush revolution by a pulley and band, as shown, or in any suitableiway. This brush should be of the proper flexibility not to disturb the pulp on the upper side of the apron and throw it backward. In practice 1 have found thatthe brush alone will accomplish the purpose desired and assist in keeping the-- meshes of the apron open, flirting the water rapidly away; but, if desired, a small pressroll K may be placed directly over the brush and above the apron, the obj ect being to press the pulp somewhat at this point and aid in removing the water in connection with the brush. At a point where the apron passes well over the roll E, I arrange a suction couchroll F, of any proper construction, from which the pulp-water may pass to the exit-pipe b. in

the common way. This roll exhausts much or nearly all of the remaining water from the pulp, and takes the latter. directly from the apron to its perforated surface, after which it transfers it to the lower press-roll G, from which the pulp passes to the upper press-roll H, where it may be removed in theusual way lin sheets, it being understood that that portion of the couch-rolll at which the web leaves it is cut oif from the suction or exhaust portion, in order that the `web may pass freely from the couch-roll to the lower press-roll. By the mechanism shown I have brought the pulp to the roll H in a remarkably dry state when the rolls D and E were but from ive to seven feet apart, which permitted the use of a very short apron, the usual apron being many feet longer, and no supporting-rolls a a were required, the brush J performing such function in addition to that of removing water.

I am aware that suction devices have been placed beneath the apron, but am not aware of a suction-roll located to take the pulp from the upper face of the apron and transfer it like mine.

Having fully described my invention, what I claim is IOO 1. The combination, withthe outer face of lthe Wire apron, of asuction-roll removing the suction-roll bearing on the outer face of the former, and the lower and upper press-rolls,

v as set forth.

3. The combination, with the'apron, rollsl for carrying it, and a suction-roll bearing on the outer face of said apron, of .a revoluble brush in contact with the under face of the apron, as and for the purposes set forth.

4. The combination, with the wire apron, 0f a brush located under said apron and a press- 1011 located above the apron and said brush, as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

FRANCIS ASBURY CUSIIMANj I I Witnesses:

AMASA O. GATES, ORL() OADY.