US1687847A - Fafer making machine - Google Patents

Description

Oct. 16, 1928. 1,687,847

R. E. READ V PAPER MAKING MACHI NE Filed Jan. e, 192'? 2 sheets-sheet 1 IN VEN TOR.

AT ORNEYS.

1,687,847 R. E. READ PAPER MAKING MACHI NE Oct. 16, 1928.

Filed Jan. 6, 1927 2 Sheets-Sheet 2 ORNEYS.

Patented Oct. 16, 1928.

UNITED STATES PATENT OFFICE.

ROBERT E. READ, OF WHITE PLAINS, NEW YORK, ASSIGNOR TO INTERNATIONAL PAPER COMPANY, A CORPORATION OF NEW YORK.

PAPER-MAKING MACHINE.

Application filed i January This invention relates to paper making machines and particularly COHCGIIIQCl'Wlth the means for establishing the travel of the.

paper web through the machine in starting the operation of the machine in the first instance, or in reestablishing the travel of the web in the event of the breakage or parting ofthe same. It is customary in these opera tions to form a relatively narrow lead strip on the web by incising the same longitudinally near one edge, and to start the travel of the lead strip through the machine, and when the travel of the same has become fully established, to gradually widen out the strip to the full width of the web. In this operation there is a'tendency of the lead strip to adhere to the rotary roll of the machine, with which it is for the time being in contact and thus fail to follow its proper course through the machine. For instance in the travel of the strip through the presses, the strip is liable to adhere to and follow around with the upper press roll instead of passing to the conveying felt below, as it should.

The present invention is designed to overcome this objectionable action and to insure that, in the event of the lead strip adhering to the roll, it may be conveniently'detached therefrom and directed to its proper path of travel, and with this end in view the invention consists in the provision of a device associated with the roll in the machine to which there is a tendency of the lead strip to adhere, which device may be operated to sever the adhering lead strip crosswise and cause its severed end to be lifted or turned away from the roll, and in combination with said device, a fluid blast device in position LO direct its blastagainst the roll at such an angle, and in such relation to the end of the lead strip, that the latter will be stripped from the roll and directed to its proper path of travel, in the particular application ofthe invention illustrated, to the conveying felt below.

The invention also consists of the method of establishing the travelof the paper web through the machine, involved in the operation of my improved mechanism.

In the specification to follow, the invention will be described in detail, and the novel features thereof will bepointed out in the appended claims. i

In the accompanying drawin sz Figi l is a side elevation of one m: the

e, 1927. Serial No. 159,253.

presses of a paper making machine showing my invention applied thereto.

Fig. 2 is a front elevation of the same.

Fig. 3 is a view similar to Fig. 1, but on an enlarged scale, to better indicate the angle of impingement ot the flu d blast against the roll.

Referring to the drawings:

In the accompanying drawings I have shown my invention by way of example in connection with the upper press roll of one of the presses of a paper making machine, to insure the passage of the lead strip to the conveying felt passing between said roll and the lower press roll, but it willbe manifest to those skilled in the art that the invention is .not limited to this particular part of the machine, but is applicable as well to other locations. for instance, to the rolls of the calender stack, and to other parts or members of the machine to which the lead strip is liable to adhere.

The press unit shown comprises as usual an upper press roll 1, a lower press roll 2, and an endless conveyor felt or traveling member 3 passing between said rolls and suitably guided by the usual guiding rolls, all as well known in this art.

In carrying out my invention, I provide a device for cutting or severing the lead strip through transversely, the severed end 9 of the strip, on account of the continued travel of the roll, presenting an oblique line or edge. The cutting finger 5 is fixed to the inner end of an operating rod 6 mounted to slide horizontally in a fixed bearing 7 at the side of the press roll, which rod may also he turned in its bearing to swing the active end of the finger to and from the roll; and the outer end of the rod is providedv with a handle 8 for positioning and operating the cutter.

As a result of the mounting ofthe cutting finger as described, it may, by a turning mo tion of the handle 8, be swung in its bearing 7 to adjust its cutting point; the operative or inoperative relation to the press roll, and by shittii'ig thehandle inwardly and outwardly, the finger may be first positioned at the inner edge or the lead strip and their drawn-outwardly across the same and thereby cut the strip transversely, for the purpose presently to be described.

Arranged above the line of action of the cutting finger, so toaet on the end of the severed lead strip, is a fixed fluid blast de vice 9, in the form of a horizontal pipe supplied with con'ipressed air from a suitable source by a supply pipe 11 leading from the outer end oi the pipe 10 and having a cut-oil valve 11 therein in order to enable the blast'to'be turned oil or on as desired. In the present inst ance the pipe 10 is formed 7 with a horizontal. lineo't air nozzles 18 communicating with the into or of the pipe and directed towards the upper press roll, so that thejets of air issuing from the nozzles, will impinge against the roll in a horizontal line, which, by reason of the number and disposition of the nozzles extends the full width of the lead strip as best shown in Fig. 2. The angle of impingement ot the line of jets on the roll, and the relation of said jets to the end of the lead strip severed by the cutter, is such that the air currents rebounding from the surface of the roll, will act to throw the severed end of he lead strip downwardly onto the conveying felt, as shown in Fig. 1.

' Under the normal conditions ot operation of the paper making machine, with the paper web traveling its proper path, the air tothe' blast device is cut on, and the cutting finger is swung down away from the roll as shown by dotted lines in Fig. 1 and is drawn to its outer position as shown by full lines in Fig. 2. In the use of the mechanism, when the leachstrip, previously formed on the web by incising the same longitudinally, adheres to and is carried upwardly withthe upper press roll, the attendant first turns on the air to "the blast device, then pushes the cutter to its inner position shown by dotted lines in Fig. 2, and then by a turning motion of the handle, swings the active end of the finger into contact with the press roll, at a, pointjust then drawn outwardly, with the result that its active cutting point engaging the lead'strip, will sever the same transversely. ting action'at the inner edge of the strip, the

' continued travel of the roll will force the adhering severed end against the cutter and said end will be thereby li'l'ted andturned away from the surface of the roll, and the air currents from the nozzles rebounding from the surface of the roll, will act behind the li'l'ted e'ndof the strip and will peel the same from the roll, and at the same time throw the end of the strip down towards and on the conveying felt as shown inFig. 1.

At the beginning of the cut- It will be observed on reference to Figs. 1 and 3' that the angle of impingement of the ir jets to the surface of the roll is such that the air currents will rebound from the roll at a sharp acute angle, and this is a very important feature of the invention,

since by reason of the particular angular renism has been operated as described in conncction with one press, the air blast of that press will be kept on until the travel of the strip has been established, as by entering between the rollers of the next press, whereupon the air to the first blast will be cut off; it being understood that with the'improvcd mechanism applied at other points in the machine, the air blast is shut elf just as soon as the Uravel of the lead strip is'established and there is no further danger of the same passing out of its'proper path:

In orderthat the blast device may be moved to an inoperative position after the travel of the leadstrip has been established, so that there will be no danger of the obstruction of the travel of the strip, which might occur by reasonof aslight slack in the strip'which at times occurs where it passes betweenthe rolls, I form the supply pipe 11 by which the blast device is supported, with jointed coupling 14: as shown in Fig; 2,

whereby the blast devicemay be swung up to an inoperative position as shown by dotted lines in said figure; and in order that when swung down again to its operative position it will be prevented frommoving below its proper point, a stop device 15 is fixed to the machine frame in position to be engaged by the inner swinging portion of the pipe.

It will be manifest to the skilled mechanic that the various details of the mechanism as above described, may be modified and changed without departing from the spirit of the invention. For instance, the air pipe instead of being provided with projecting nozzlcs'for the discharge of the air currents, may be formed with a continuous slit, or the pipe maybe provided with a line of holes therethrough; and the detailed formof the'cutter device may be variously modifiedgand likewise thev manner of mounting the same, all of which changes and modifications will tall within the scope of the in 'vention, which in-its broader aspect-as re- Inn llO

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gardg the mechanism, involves the combina tion with means for severing the adhering lead strip, of a fluid blast to direct the severed end of the strip to its proper path of travel.

Having thus described my invention, what I claim is:

1. In a paper making machine, the com bination of a rotary roll, a traveling member in position to receive the paper web from said roll, a cutting device operable to sever a lead strip on the roll, and a fluid blast device associated with said cutting device and in position to blow on the severed end of the strip and opvating to carry it toward the traveling member.

2. In a paper making machine, the combination of a rotary roll, a traveling member in position to receive the paper web from said roll, a -utting device operable to sever a lead strip on the roll, and a fluid blast device associated with said cutting deviw) and in position to direct its blast against the roll at a point above the smrered end of the strip, and at such angle that the blast in rebounding will actto carry the strip toward the traveling member,

3. In a paper making machine, the com bination of a rotary roll, a traveling member in position to receive the paper web from said roll, a cutting device operable to sever a lead strip on the roll, and fluid blast device associated with said cutting device and in position to so impinge its blast against the roll, that the blast will rebound from the roll against the lead strip at an angle acute to its direction of impinge ment, and in a direction toward the traveling member. i

4. In a paper making machine, the combination of a rotary roll, a traveling memher in position to receive the paper web from the roll, a cutting device operable to sever a lead strip on the roll along a line oblique to the direction of travel of the strip, and in such position that the continued travel of the roll will carry the severed end of the strip against the knife andlilf't said end from the roll, and a blast device associated with said cutting device and in position to impinge its blast against the roll at such point and in such direction, that the blast in rebounding will act on the lifted end of the strip and carry the latter toward the traveling member. a

5. The method of establishing the travel o1": a paper web through a paper making machine, which consists in forming a lead strip on the web, severing the adhering leac strip on a rotary roll of the machine and lifting the severed end of said strip from the roll, directing a fluid blast against the'litted end of the strip to cause the strip to be carried by the blast to its proper path of travel, and when the travel of the lead. strip has been established, Widening said strip to the full widtn of the Web.

6. In a paper making machine, the combination of a rotary roll, a traveling member in position to receive the paper Web from said roll, a cutting device operable to sever lead strip on the roll, a fluid blast device in position to act on the severed end of. the strip to carry it toward the traveling member, and a supply pipe connected with the fluid blast device to supply fluid under pressure thereto, said supply pipe being formed with a jointed coupling to enable the blast device to be swung to an inoperative position relative to the roll.

In testimony whereof I have affixed my signature hereto.

ROBERT E. READ.

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