US483329A - Suction mechanism for paper-machines - Google Patents

Description

(No Model.)

J REYNOLDS. SUCTION MECHANISM FOR PAPER MAGHINES.

Patented Sept. 2'7, 1892.

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UNITED STATES PATENT OFFICE.

JAMES REYNOLDS, OF FAIRFIELD, ASSIGNOR TO ROSWELL M. FAIRFIELD,

' OF HOLYOKE, MASSACHUSETTS.

SUCTION MECHANISM FOR PAPER-MACHINES.

SPECIFICATION forming part of Letters Iatent No. 483,329, dated September 189 2. Application filed September 9, 11891. Serial No. 405,138. (No model.)

To all whom it may concern;

Be it known that I, JAMES REYNOLDS, a subject of the Queen of Great Britain, residing at Fairfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Suction Mechanism for Paper-Machines, of which the following is a specification.

This invention relatesto improved mechanisrn or apparatus for insuring the with: drawal of water or moisture from the web or layer of paper-stock as it is carried along on the wire apron or open-work support therefor.

The object of the invention is to provide. an apparatus for the purpose indicated which is available for use in connection with a layer or web of any width, which is unusually effective in the extraction of the moisture from the paper, and otherwise advantageous for reasons which will hereinafter appear.

The invention consists in the construction of parts, and also in the combination and arrangement of parts, all substantially aswill be hereinafter. particularly set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part of this invention, in which similar characters of reference indicate corresponding parts in all of the views, and in which- Figure l is a plan view of the suction apparatus, a partonly of the web and supporting-apron therefor being shown. Fig. 2 is a sectional elevation taken on line 2 2, Fig. 1. Fig. 3 is a cross-section on line 3 3, Fig. 1. Fig. 4 isa section through one of the movable section-boxes for the rolls, the plane of section through said box being indicated byline 4 4, Fig. 1. Fig. 5 is a perspective view of the same. Fig. 6 is a perspective and sectional View of a portion of one of the rolls.

In the drawings, A represents a rectangular box, which forms the main support for the other parts of the apparatus and largely serves in the establishment of the suctionchamber, the said box being open at its top, its sides and bottom being closed, except as therefrom. For practicability of construction the ends a a of the main box A are made removable and are adapted to be held in place by bolts.

B B represent the suction-rolls, which have gudgeons at their ends, by which they are journaled in the bearings 19 b in the end walls of the box, and the peripheries of the rolls are at or about at the level of the upper edges of the walls of the box. These rolls are in preference constructed of a metallic hollow to orifice of the suction-pipe c, which leads cylinder 10, with a solid wooden filling 12,

and both are bored transversely through and through at frequent intervals, as indicated at 13.

D D represent movable sections or boxes, which directly constitute end walls of and in part serve to establish the suction-chamber within the main box A, and said section-boxes are located near the ends of the main box. Each box D is of a length and height corresponding to the width and height of the inte rior of the main box A, and the side walls of the box A have dovetail ways 9 therein, in which the dovetail extensions 11 of the boxes D are closely fitted. The said movable sections D are engaged by the screw-shafts G G, which are supported for rotation, but against endwise movement, on the end walls a a. of the main box, and all so that on turning the screws the distance of separation between the boxes may be greater or less, in accordance with the width of the web of paper-stock from which the moisture is to be withdrawn.

0 represents a portion of the usual endless supporting wire-cloth apron for the web a which runs over the top of the box A, over the upper peripheral portions of the rolls B B, and over the upper surface of the movable section-boxes D D, and as further supports for said apron the rolls F F are mounted at the outside of the box A, so that the upper portions of their peripheries are at the proper supporting-level.

The movable section-boxes D are made hollow and preferably of metal, such as sheet brass or copper, and each of said boxes has at its upper portion the wall thereof of circular contour, so as to receive in the apertures d, surrounded Joy such walls, the rolls B B with as close a'fit as practicable, the upper peripheral surfaces of the rolls being in the plane of or very slightly above the top of the section-boxes D. The bottoms and sides of said boxes are formed imperforate, while the top wall thereof, together with the walls which comprise the greater part of circles and form the apertures d, have the perforations 15. The walls bounding the apertures d d are lined with perforated leather, as

' indicated at f, Fig. 5, to form bushings for Therefore, the suction appliance being conthe rolls B, so that aimore efficient character of bearing is provided between the rolls and section-boxes,the object being to prevent unnecessary cutting and wearing of the metallic parts.

It indicates a conduit, which may be a flexible rubber hose, to be attached to a watersupply and leads to the interior of the section-boxes, one for each, to supply water in eachbox. 7

It is intended to have the water which enters into the section-boxes practically fill the same and serve as a water packing between the rolls B B and the walls surrounding the aperture cl in said section-boxes through which said rolls pass. Thus a more effective suction is insured in the suction-chamber within the main box A, which suction-chamber is constituted at the bottom and sides. by the bottom and sides of the said main box A and at the end by the section-boxes D D.

nected to the suction-pipe c, the moisture which is in the web of paper x will be in part extracted through the perforations in the rolls B B,-dripping therefrom into the bottom of the suction-box, being conveyed away by any suitable egress passage or conduit. Themost substantial and elfec'tive operation by suction upon the passing web is had between the peripheral portions of the two rolls borne upon by the web.

In the passage of the apron and web over the rolls B B said rolls are permitted to rotate slowly in their bearings to correspond with the speed of movement of the apron, and it will be understood that owing to the suction transversely through the rolls the apron and web are caused to adhere more closely thereto throughout the entire width of the web, whereby the vacuum chamber will be the more nearly perfectly maintained, and whereby thepassing apron will more effectually insure the rotation of the'rolls. It is of course understood that the rotation of the rolls at a rate precisely corresponding to the travel of the wire-cloth apron is a very desirable attainment, for thereby the friction of the rolls upon the web (which might otherwise be imparted by slipping contact of the apron over the rolls) is measurably avoided.

The water which passes from the bearings between the rolls B B and the section-boxes may run to the bottom of the main box A and be withdrawn therefrom in any manner expedient.

The diametrical passages through the practically solid rolls are deemed preferable over a cylindrical perforated shell, (which latter, however, might be employed under the invention,) for such passages serve to conduct moisture received at the top directly to the under side of the roll to fall therefrom into the bottom of the box A.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. In suction mechanism for paper machines, the combination, with the web-carrying apron and suction-chamber having the end walls thereof constituted by chambered section-boxes having perforated curved walls which constitute apertures d and a conduit for supplying water into said section-boxes, of one or more rolls having perforations through them and closely fitted within said apertures, substantially as described.

2. In a suction mechanism for paper-machines, the combination, with a main box having bearings in its ends and a suction-com duit leading thereinto, of one or more rolls B B, mounted in said bearings and having perforations transversely through them, and section -boxes adjustable .the one toward and from the other and having apertures d (1, through which said rolls pass with a close fit, substantially as described. 7 7 it 3. In a. suction mechanism for paper-machines, the combination, with a suction-chamher, the end walls thereof constituted by chambered section-boxes having perforated curved walls forming apertures d, the perforated liningf, and a conduit for supplying water into said section-boxes, of one or more rolls having perforations through them and closely fitted for rotation within said lined apertures, substantially as described.

4. In a suction mechanism for paper-ma chines, in combination, a box having a suc tion chamber, one or more rolls rotatably mounted thereon and provided with perforations or passages which are in communication with said'suction-chamber, the web car rying apron movable upon said rollers, and supporting-rollers for the apron mounted outside of and near said suction chamber, substantially as described.

5. In a suction mechanism for paper-ma chines, a roll consisting of an outer metallic shell and a filling of wood, said roll having a series of perforations or passages through it, and a suction-chamber and web-carrying apron combined for operation, substantially as described,

6. In a suction mechanism for paper-machines, in combination, the box A, having the bearings b b in its ends and the suctionpipe 0 leading thereinto, the rolls B B, hav= screws G G, and the endless web-carrying apron C, substantially as described.

JAMES REYNOLDS.

Witnesses:

H. A. CHAPIN, T. HENRY SPENCER.

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