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Publication numberUS417451 A
Publication typeGrant
Publication dateDec 17, 1889
Filing dateApr 19, 1889
Publication numberUS 417451 A, US 417451A, US-A-417451, US417451 A, US417451A
InventorsEdmund Victory
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 417451 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Mode l.) 3Sheets -Sheet 1.


Elm-417,451. Patented Dec. 17, 1889.

'1 M06 I 222 22222220 W210i? ATTORNEY (No Model.)


No. 417,451. Patented Dec. 17, 1889 WIT/VESQES:

A T TOR/YE Y I N. PETERS. F'hulo-Lvlhugmphcr, Wnshluglml. 11.0v




SPECIFICATION forming part or Letters Patent No. 417,451, dated December 17, 1889. Application filed April 19, 1889. Serialllio. 307,895. (No model.)

chines, 'of which the following is a specificafl tion.

My invention consists in a new and im-: proved pulp-screening machine, which will be hereinafter fully described and claimed.

Referring to the accompanying drawings,

Figure 1 is a perspective view of my new and improved pulp-screening machine, showing the hinged top opened. Fig. 2 is a longitudinal vertical central sectional view ofthe machine. Fig. 3 is a transverse vertical sectional view taken on the plane indicated by line 00 0c of Fig. 2; and Fig. 4 is a detail view, hereinafter referred to.

The same numerals of reference indicate corresponding parts in all the figures.

Referring to the several parts by their designating numerals, 1 indicates the supporting-frame of the machine, and 2 indicates the rectangular body-frame, which has the series of parallel cross-bars 3, forming the rectangular spaces 4. At the top of the spaces 4 are secured the separate bellows-plates 5, the sides of which are connected to the cross-bars 3, while their ends are connected to the side pieces of the frame 2 by the flexible bellowsjoints 6, of suitable material.

In the lower part of the frame 1 is mounted a longitudinal drive-shaft- 7, which is revolved in any suitable manner, and upon this shaft, below the center of the bellows-plates, are

mounted a series of eccentrics 8 9, which are connected to the middle under side of the bellows-plates by the frames 10. These eccentrics are arranged alternately, so that as the alternate eccentrics S elevate the alternate bellows-plates to which they are connected the other alternate eccentrics 9 will lower the alternate bellows-plates to which they are connected.

The outer edges of the flexible bellowsjoints 6 are secured under metal strips 11 12. Atthe outer edge of the strips 11, which run around the top of frame 2, is secured a packing 13, of rubber or other suitable material, while the metal strips 12 extend along the 1 center of the top of the cross-bars 3, and

along. both their edges are secured packingstrips 14:, of rubber or other suitable material.

15 indicates the top of the machine, which is hinged at one side, the screws at the lower leaf of each hinge passing through short slots in the hinge-leaf, or the top can be otherwise loosely hinged. The top has cross-bars 17,

which register with the cross-bars 3 of the body-frame 2,and the screen-plates 18' are secured on the top, as shown, with their side edges meeting on the cross-bars 17. The top 15 and body 2 have opposite apertured lugs l9,through which screw-bolts 20 pass,having nuts on their ends, and it will be seen that by tightening these screw-bolts the top will be locked tightly down, the top and its crossbars pressing down firmly on the packing13 and 14 around the ends and sides of the be llows-plates 5, thus separating each bellows plate by an air-tight joint extending entirely around it and rendering each bellows and the screen-plate above it entirely independent from all the others. This is an important feature of my invention.

The top of each bellows-plate is concave, and each bellows is formed with a central opening 21, from which a short pipe 22 leads down into a box 23, which is secured longitudinally beneath the center of the crossbars 3. The lower ends of these pipes 22 terminate at about the distance above the bottom of the box shown, and they are always sealed by the water and paper stuff in the boX, above which they never rise.

In operation it will be seen that as the drive-shaft 7 revolves the bellows-plates, each having its separate eccentric, will be moved up and down alternately, as before described, the bellows-joints 6 permitting this movement, and, as the packing completely around each bellows separates it completely from the others when the top 15 is fastened down by the screw-bolts, it will be seen that each bellows will operate independently of all the others and draw the paper-pulp which flows upon the screen-plate above it down through the screen plate. The paper pulp is thus in g bellows, and passes down through the central openings 21 and pipes 22 into the longitudinal box 23, from which it may be discharged through pipes 24, or in any other suitable manner.

I do not wish to confine myself to the discharge-pipes here shown, as I may employ any other well-known means for effecting the same purpose.

It Will be seen that by arranging the eccentric so that the bellows rise and fall alternately the machine will be steadied and will run evenly.

In order to brace and strengthen the comparatively-thin cross-bars 17 of the top, I employ brace-bolts 25, two to each bar, as shown, which pass up through the cross-bars 3 of the body 2 and through the bars 17, and have nuts 26 upon their upper threaded ends, which fit in recesses in the bars 17,flush with the top of the same. hen the top is closed and screwed down, the screw-bolts 25 are screwed up tight in the nuts 26,and will thus strengthen and brace the cross-bars 17 and prevent springing of the screen-plates.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. In a pulp-screening machine, the combination of the series of separate screens 18, the series of independent bellows-plates 5, having the flexible bellows-joints 6 at their sides and ends, the drive-shaft 7, having the eccentrics 8 9 alternately arranged upon it, and the connecting-frames 10, substantially as set forth.

2. The combination, in a pulp-screening machine, of the body-frame 2, having the parallel cross-bars 3, the series of independent reciprocating bellows-plates 5, having the flexible bellows-joints 6 at thcirsides and ends, the flexible packing-strips 13 and 14, extending around the ends and sides of each bellows, and the top 15, having the series of parallel cross-bars 17 and the screen-plates 18, substantially as set forth.

3. The combination of the body-frame having the cross-bars, the reciprocating bellowsplates having the bellows-joints and formed with the concave upper faces and central discharge-openings, the packing around each bellows, and the top having the cross-bars and the screen-plates, substantially as set forth.

4. The combination of the body-frame havin g the cross-bars, the reciprocating bellowsplates having the bellows-joints, the concave upper faces, the central discharge-openings, and the pipes leading down from said openings, the packing around said bellows, the top having the cross-bars and the screen-plates, and the longitudinal box having the discharge, substantially as set forth.

5. The combination of the body-framehaving the cross-bars, the reciprocating bellowsplates having the bellows-joints, the concave upper faces, the central openings and the pipes leading from said openings, the driveshaft having the series of eccentrics alternately arranged upon it, the connectingframes, the packing around each bellows, the top having the cross-bars and screen-plates, and the longitudinal box having the (lischarge, substantially as set forth.

6. The combination, with the body having the cross-bars formed with the apertures between the bellows, and the top having the apertured cross-bars which support the screen edges, of the brace-bolts having the nuts on their upper ends, substantially as set forth.

EDMUND VICTORY. lVitn esses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5456365 *Oct 26, 1993Oct 10, 1995Sweco, IncorporatedVibratory screen separator
Cooperative ClassificationD21D5/026