US1519985A - Transfer roll in paper-making machines - Google Patents

Description

Dec. 1924- 1,519,985

F. D. SIMMONS TRANSFER ROLL IN PAPER MAKING MACHINES Filed May 19, 1921 Sheets-She i llllll H Patented Dec. 16, 1924.

UNIT E FREDRICK D. SIMMONS, OF OCEAN FALL$, BRITISH COLUMBIA, CANADA.

TRAN SEER ROLL IN PAPEBMAKII\TG MACHINES.

Application filed May 19, 1921.

T 0 all whom it may concern:

Be it known that I, F REDRICK D. SIM- MoNs, a citizen of the United States, and a resident of Ocean Falls, Province of British Columbia, Dominion of Canada, have invented a certain new and useful Improvement in Transfer Rolls in Paper-Making Machines, of which the following is a specification.

My invention relates to the manufacturing of paper by machinery. When first starting up it is necessary to carry the paper web from one mechanism to another in the succeeding processes, for example carrying the paper from the fourdrinier to the presses, or from the latter to the felts. The same operation has to be repeated whenever there is a break in the paper. Such transferring of the end of the paper web from one mechanism to another requires the services of a very skilled attendant, because since the paper is in a moist condition, it is very difficult to transfer the same by hand from the roll of one mechanism to the roll of another mechanism; hence causes a stoppage in the process, and a reduction in the amount of paper produced.

The object of the invention is to provide mechanical means which may be thrown into action, and which function to pick off the end of the paper web from one roll and carry it over to and deposit it on another roll, these means being manually thrown into action as required, and serve to carry the leading end of the paper web forward in an instant.

I attain my object by a hollow transfer roll having peripheral perforations, and in combination therewith I provide means for producing partial vacuum within the transfer roll, thereby causing the latter to exert a suction upon the paper web with which it is brought into contact. the transfer roll. thus functioning to lift the web end ofi the roll on which it was reposing, and to hold it on the transfer roll until the vacuum in the latter is broken; and I further provide means for projecting compressed fluid, for example air or steam, thru a perforation of the said transfer roll, thereby pushing the paper web from the transfer roll and throwing it on to the adjacent roll of another mechanism.

The transfer roll is located between the two rolls which for convenience may be termed carrier rolls from one or the other Serial No. 470.847.

of which the paper is to be carried. The supporting means of the transfer roll are adapted to permit the former to be thrown into and out of contact with the carrier roll from which the paper end is to be lifted; the transfer roll will then be rotated by a frictional contact with such carrier roll, and the means controlling the said. application of suction and repelling forces thru the medium of the transfer roll are thrown into action by rotation of the latter. Thus all. the attendant has to do is to throw the transfor roll into its active position in order to carry the end of the paper web from one mechanism or roll to another.

The details of construction and the mode of operation of my invention is more clearly hereinafter described with reference to the accompanying drawings.

In the drawings,

Fig. 1 is a diagrammatic side elevation representing adjacent mechanisms in paper making machines, each mechanism embodying a roll and this figure illustrates the practical application of my invention;

Fig. 2 is a fragmentary longitudinal sec tion of my invention, and serves to illustrate the construction of the parts, the section of the transfer roll 7' being taken on the broken angular line 2-2 of Fig. 8;

Fig. 3 represents a transverse section of my transfer roll taken on the broken line 3 of Fig. 2, also shows diagrammatically sec tions of the two adjacent rolls with which my transfer roll operates; this view illustrates diagrammatically the operation of my device;

Fig. 4 is a fragmentary view of the under side of the suction pipe (marked 7 in the drawings) on which my transfer roll is 1'0- tatably mounted: this figure illustrates the positions of the suction orifices provided on the under side of this pipe and extending approximately for a distance of 90 degrees of its circumference;

Fig. 5 shows a transverse section of the transfer roll taken on the plane of the broken line-segments 3-2 of Fig. 3, and shows the arrangement of the parts provided in the hub of the transfer roll for supplying the suction and repelling forces:

Fig. 6 is a side elevation of that end of the suction pipe on which. the transfer roll is mounted; and

Fig. 7 is a fragment of the bushing 1.

The devices diagrammatically shown in Fig. 1 will be recognized by those conversant with the art as representing well known mechanisms of a paper making machine, and it is assumed that my invention is to function to carry the paper web a from the roll I) to the roll 0. (Z represents a standard in which is journalled an eccentric box e in which is journalled a pipe f, which is connected by a pipe 9 (see Fig. 2) with a suction creating means; or in other words with means for creating a partial vacuum in the pipe The eccentric box 0 has a handle 76 for rotating the former as indicated by the broken line thereby correspondingly chang ing the position of the suction pipe On one end of the latter is rotatably mounted the transfer roll The mounting is effected by the flange against which abuts a flanged bushing Z, the latter being kept in place by a screw cap m. The suction pipe is provided at that end on which the transfer roll is mounted with a plurality of perforations a constituting orifices thru which the suction force is applied on the exterior of the suction pipe. Said suction orifices extend for approximately ninety degrees around the clrcumference of the suction pipe h as illustrated in Fig. 3.

0 is a pressure pipe assumed to be connected with suitable air compressing means, or other fluid under pressure. The pressure pipe 0 has an elbow 0 which discharges thru an opening of the suction pipe.

The transfer roll 7' is provided with a plurality of transverse suction slots Q, 9, spaced equi-distant from each other, thus 120 degrees apart in the circle described, by the periphery of the transfer roll. These suction slots extend across the eye or hub of the transfer roll as more clearly shown in Fig. 5.

-The transfer roll is further provided with a plurality of radial pressure ducts extending from the hub of the transfer roll to the circumference, said radial pressure suction being to. come into registration with the discharge opening 29 of the pressure pipe during the rotation of the transfer roll. The bushing Z is provided with holes registering with said holes of the suction pipe.

The transfer roll is rotated by being placed; into frictional contact with the roll 7). The transfer roll is placed in its active and. non-active positions by rotation of the eccentric box 6 by the handle 7 as diagraininati" cally illustratedin Fig. l.

It is to be noted from Fig. 3 that one or the other of the suction ducts q, 1, will be positionedto apply the suction force on the paper web (I carried by the roll 7) during each one-third revolution of the transfer roll, thus, no matter what position the suction ducts of the transferroll j occupy with respect to the roll I), when the transfer roll is brought into frictional contact with the web reposing on the 129 .11? th tre er'r ll s r tated the suction force will be applied, and will lift the web of paper. off the roll I) such web will then be held on the transfer roll until the suction is broken and in the contin uing rotation of the transfer roll one of the radial pressure'ducts g or the ducts g, is brought in registration with the outlet 29 of the compressed aii pipe 0, and a blast of air will be discharged from the circumference of the transfer roll upon the web end which it carries thus pushing such end off the circumference of the transfer roll, and throwing it onto the roll a.

The transfer of the web end from the roll 6 to the roll 0 having been accomplished the eccentric box a is reversely rotated to its initial position, thereby placing the transfer roll in its inactive position, indicated by the dotted line j in Fig. 1, and the web of paper the transfer roll being taken on the broken angular line 22 of Fig. 3;

In order to obtain an air tight contact between the rim of the transfer roll and the web reposing on the roll 6, the former is provided with a circumferential band of rubber 11, or equivalent material in that way promoting and assuring its suction effect, the rubber band having holes cut out opposite said suction and pressure ducts. And in order to prevent the web. of paper being drawn into the suction ducts g, g, 9 the mouths of the said ducts are covered with wire cloth as at o in Fig. 5.

From the foregoing description it is apparent how the rotation of the transfer roll opens and closes, in sequence the suction. and the In'essure or repulsion ports in the cir cu nfe ence of the transfer roll. These ports are preferably so arranged that therewill be an interval during the rotation of the transfer roll when there will be neither suction nor repulsion, so that one port may be closed before the other is opened.

I im:

1. In devices of the character described comprising two adjacent carrier rolls. the the combination with the latter ofa rotatable transfer roll located between said car rier rolls, and supported for being moved into and out of contact with the latter, vacuum producing means. a source of [luid under pressure. and means adapted to apply the suction and pressure forces in sequence thru the periphery of said transfer roll during the rotation of the latter, and relatively to said carrier rolls.

2. In devices of the character described comprisingv two adjacent carrier rolls, the combination with the latter of a rotatab e transfer roll located between said carrier rolls, and supported for being, moved into and out of contact with the latter, vacuum producing means, a source of fluid under pressure, said transfer roll, being provided w h a pl ra tyv f rad al: lee s openin n the circumference of the transfer roll, some of said ducts being adapted for connecting with said suction producing means and the others with said pressure producing means, and means whereby said ducts are opened and closed during the rotation of said transfer roll, and relatively to said carrier rolls.

3. In devices of the character described comprising two adjacent carrier rolls, a rotatable transfer roll located between said carrier rolls. and supported for being moved into and out of contact with the latter, vacuum producing means, a source of fluid under pressure, and means adapted to apply the suction and pressure forces in sequence thru the periphery of said transfer roll during the rotation of the latter, and relatively to said carrier rolls.

4.. In devices of the character described comprising two adjacent carrier rolls, a suction pipe connected with suction produc ing means, a pressure pipe located axially within the suction pipe, being connected with a source of fluid under pressure, and having its discharge opening in said suction pipe, supporting means for said suction pipe, adapted to permit the same to be moved so as to place the transfer roll into and out of contact with said carrier rolls, said transfer roll being provided with a plurality of radial ducts opening in the circumference of the transfer roll, the suction pipe being provided with orifices registering with said ducts of the transfer roll and so located as to open and close said ducts respectively, thereby to apply the suction and repulsion forces thru the transfer roll during its rotation, and relatively to the carrier rolls.

5. In devices of the character described comprising two adjacent carrier rolls, a suction pipe connected with suction producing means, a pressure pipe located axially within the suction pipe, being connected with a source of fluid under pressure, and having its discharge opening in said suction pipe, an eccentric rotatably supported box carrying said suction pipe and whereby said transfer roll may be placed into and out of contact with said carrier rolls, said transfer roll being provided with a plurality of radial ducts opening in the circumference of the transfer roll, the suction pipe being provided with orifices registering with said ducts of the transfer roll and so located as to open and close said ducts respectively, thereby to apply the suction and repulsion forces thru the transfer roll during its rotation, and relatively to the carrier rolls.

6. In devices of the character described comprising two adjacent carrier rolls, a suction pipe connected with suction producmg means, a pressure pipe located axially within the suction pipe, being connected with a source of fluid under pressure, and having its discharge opening in said suction pipe, supporting means for said suction pipe adapted to permit the same to be moved so as to place the transfer roll into and out of contact with said carrier rolls, said trans fer roll being provided with a plurality of radial ducts opening in the circumference of the transfer roll, the suction pipe being provided with orifices registering with said ducts of the transfer roll and so located as to open and close said ducts respectively, thereby to apply the suction and repulsion forces thru the transfer roll during its rotation, and relatively to the carrier rolls, the circumference of the transfer roll having a band of yielding material, perforated opposite said ducts, and the holes opposite the suction ducts having a perforated covering to prevent material being drawn into such ducts.

7. In devices of the character described comprising two adjacent ca rrier rolls, a suction pipe connected with suction producing means. a pressure pipe located axially within the suction pipe, being connected with a source of fluid under pressure, and having its discharge opening in said suction pipe and whereby said transfer roll may be placed into and out of contact with said carrier rolls, said transfer roll being provided with a plurality of radial ducts opening in the circumference of the transfer roll. the suction pipe being provided with orifices registering with said ducts of the transfer roll and so located as to open and close said ducts respectively, thereby to apply the suction and repulsion forces thru the transfer roll during its rotation, and relatively to the carrier rolls, the circumference of the transfer roll having a band of yielding material, perforated opposite said ducts, and the holes opposite the suction ducts having a perforated covering to prevent material being drawn into such ducts.

8. In devices of the character described comprising two adjacent carrier rolls, a rotatable transfer roll located between said carrier rolls, and supported. for being moved into and out of contact with the latter for rotation by such Contact, vacuum producing means, a source of fluid under pressure, and means adapted to apply the suction and pressure forces in sequence thru the periphery of said transfer roll during the rotation of the latter, and relatively to said carrier rolls.

FREDRIGK D. SIMMONS.

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