US1090974A - Fourdrinier machine. - Google Patents

Description

A. J. DAVIBS. FOURDRNIER MACHINE.A

APPLIUATION FILED 1mm, 1911.

1,090,974. Patented Mar.24,1914

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ALBERT J. DAvIEs, or WOODLAND, MAINE.

FOURDRINIER MACHINE.

Specication of Letter: Patent. Patented Mar. 24, 1914.

Application led December 7, 1911. Serial No. 864,416.

To all whom it may concern.'

. Be it' known that I, .ALBERT J. DAvms, a

citizen of the United States, residing at VOOdland, countyl of lVashington, State of li'lainefliave invented vcertain new and useful Improvements in Fourdriniei Machines, of which the following is a specification.

This invention relates to improvements in paper making machine of the Fourdrinier type and has for its main object the oscilla ting of the vacuum boxes beneath the wire cloth which carries the paper pulp.

I-Ieretofore these boxes have been held stationary and a slight-vibratory effect, under certain conditions which will be explained, is obtained from the vibration of tie wire cloth at the entering end of the machine. This vibratory motion,the object of which is to form the sheet, has for its theoretical pivot point the-Ifeed roll beyondthe vacuum oxes; eonseq'uently'the radius' of vibration y over said boxes must be small and, underthe most favoring conditions, insufficient to overcome certain hindering effects. Forinstance, whenthe wiref'eloth is new the lon.

f gitudinal wires' ofthe mesh are apt to'wear grooves in the tops of the boxes and'in this way shortentlieradius of vibration so as to practically .eliminate all effect at thispoint.

seams orjoinings of this cloth, one ofwliich is represented at S in Fio. 2 of the accompanying drawings, the onlly ill efl'e'et of this state of affairs would be that the continual wearing of the wire clothin these grooves considerably lessens its life and necessitates more frequent renewals than are required when my improvement is added. In practice, it is customary to frequently plane outthese grooves and when the cloth becomes smooth and worn the ffrooving effect is less noticeable and a sma. l portion of the vibratery movement is noticed at these points. The seam S however, completely nullifies whatever of goed there may have been, as before described, unless the cloth has been perfectly joined, a very unusual circumstance, for when this seam comes in contact with the box it is snap ed over its top in such a way as to lift the ongitudinal wires out of their grooves and when the seam has passed on there is great probability that these wires do not drop baclc into their original'groovcs but into the ones adjacent. This movement causes a'continual creepingvof the wire cloth to'ward'oneside of-the machine and if not lVere itnot .for-the interfering efl'ect of the.

watched and correct-ed will in time buckle and break the Cloth. Careful study of these yconditions has led me to,devise means to cause ra id but slight oscillations of the vacuum, oxesz and Iiy causing alternating boxes to'move in opposite directions simultaneously, I break up this groovino tendency, prolong the life of the wire clotlli and prevent creeping, and also eliminate the necessity for frequent planing of the boxes.

n the accompanying drawings which forni part of this specification,-Figure 1 shows, in diagram, part of a paper making Amachine embed ing my invention, Fig. 2 is a plan view of t ie portion of Fig. 1 to which my invention is applied, Fig. 3 is a cross sectional elevation on line 3-3 of Fiff. 2, Fig. 4 is an enlarged detail viewed as inbFig. 3,'and Fig. 5 is a'partial section along line 5-5 of Fig. 4:. 4

In Fig.: 1, the tablerolls are represented bythe numeral 1, and the shaker rail by the numeral 2.'A 3 is` the deckel strap, 4 the feed roll and 5, 5 the .couch rolls of the usual type' of machine.

Heretofore 4the boxes 6, 7, l8, 9, 10 and 11 have `been rigidl secured to stationary bars similar in widti toithe'shaker rail 2, as seen iii Fig. 2; but I prefer to replace these statlonarylbars each with two narrower ones 12 jandl3, all being pivetally mounted at 14. To these bars 12 are secured, by means of bolts 16, the boxes G, 8 and 10; and to bars 13, the boxes 7, 9 and 11 are secured by means of bolts 17. At the outer. end, bars 12 are banded together by the brace 18 und bars 13 by brace 10, both braces being pivotally connected, each to each, at 20, 2O to eccentric rods 21, 21, each connecting with its own eccentric 22 on a shaft 23. The shaft 23 may be continuously driven by means ot a pulley 24: und the effect of this driving is to give alternate oscillatory motion of bars 12 and 13 with their ldepending boxes, about pivots 14. It will be understood that the boxes might be all oscillated in the same direction.without departing from the spirit of my invention; but refer to alternate them, as described.

n securing the various boxes to their respective bars 12 and 13, I )refer to slot the two diagonali),r opposite bo t holes over each box, as indicated at 16l and 17l so as to allow some latitude for the twisting ell'ect of the radial movement.4

In practice, a clearance of a few limi- 'drcdths ofnn -inch u'ill give thenecessury play, as the totaly-.amplitude of each oscillat1on`n'111 not be overone eighth of aninch and may evenbe as small as'o'nesixteenth of un inch.'4 I A In Figs. 3, -1 and 5 are most clearly illustrated u few minor features of my, invention. Under' tho'freeends of bai-slt. and 18 are placed rollsfQ, 25 cach poeketcd in steel bushingsl Q6," 2G' in fthe standards 27. Bolts 28 .securecl'l yj means of-strap'sfQQ to standards'y Tare'zidiipted toip'ass through .slightly elongaidholes 30 in bars-12 and "18 for thepur'posc of-holding said hars down 'against `the 11611525. This lsneccssary A in order thatb'a'rslQ v and 13 may form nfngcs to limit the upward adjustment of the oxes 6, 7,.et c., affainstthc' under side of Wire cloth The boxes-6, 7,jctc.',are of ordii nary construction andneednno detailed description, "j e'xccptv that` attention may be called to the scarf or grooveG which is out inthe under side Vof either of the bars 12 ."or 13' Where.` necessary; to avoid any. frictionilhcon'tact Axvithsuch. boxes which are secured to thefoppositepairof bars.v A few lperforations 51 only are shown in the top of each box, 6', 7, 8, 9.10 and.11,it being understood that their 'number has no bearing on the features otlmy invention.

40 represents the' airtube `for maintaining the vacuum'inthe various boxesaand 41, 41, etc.,lv the l'individuall branchtubes, x one to each box. These latter :are made. with La4 iiexibiey section, 4to permit" the necessary' l increment of the boxes.` It will be understood thatIdo not limit -pair of rails on each side, a

myself to pivoted bars 1'3 13 as means to oscillate them bodily are included within 'the scope of my invention.

These and various other modifications of my device are intended to be included as part of m invention within the limits of the nppen ed claims.

What I therefore claim und desire to secure by Letters Patent is:

1. In a Fourdrinier machine, a pair of rails on each side of the paper making wire, u pair of suction boxes, one attached to one and the other to the other member oi each pair'oif rails on eaclnside, and means for m'iparting to said rall members opposite transverse movement to cause the opposite lateral movement of said suction boxes.

2. In a Fourdrinier machine a plurality ofelosely adjacent suction boxes and means for imparting to each of said boxes a reciprocating motion opposite at all times to the motion of the box next adjacent.

3. In a.l Fourdrinier machine, a pair of rails on each side of the paper making wire, a pair .of suction boxes, one attached to one und the other to the other member of each air of links connectin .corresponding mem )ers on each of therai pairs, a pair of oppositely (phased cams-operatively associated with sai and means for rotating said cams.

,In tcstimon whereof I aiiix my signature Vinpresenee o two witnesses.

ALBERT J. DAVIES. `Witnesses;

R. B. ELLMs, ETnnLF. YA'rEs.

Copie of this -patent may` be obtained. for ve cents nach, by addressing the. Commissioner of Patents.

Wlghlngtoxn. 0.

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