US1794058A

US1794058A - Cleaner for paper driers

Info

Publication number: US1794058A
Application number: US282411A
Authority: US
Inventors: Arthur E Broughton
Original assignee: BROUGHTON Co
Current assignee: BROUGHTON Co
Priority date: 1928-06-02
Filing date: 1928-06-02
Publication date: 1931-02-24
Anticipated expiration: 1948-02-24

Description

Feb. 24, 1931. A. E. BROUGHTON 1,794,058

CLEANER FOR PAPER DRIERS Filed June 2, 1928 2 Sheets-Shee t 1 Feb. 24, 1931. A. E. BROUGHTON CLEANER FOR PAPER DRIERS Filed June 2, 1928 2 Sheets-Sheet 2 Patented Feb. 24, 1931 ARTHUR E. BROUGHTON,

OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO BROUGHTON COMPANY, A CORPORATION OF SOUTH DAKOTA CLEANER FOR PAPER DRIERS Application filed June 2,

' This invention relates to a device for con tinuously removing particles of fibre and sizing, and the like, which are deposited upon the revolving rolls of paper drying machin- I ery. As is well known, the wet paper web in passing over the peripheries of thedriers deposits particles of sizing and fibers which "adhere to the rolls and in time form a coating. If the particles are allowed to accumulate, the rate ofdrying is reduced and rough 1 surfaces are formed on the paper. The surface deposit on the rolls is particularly troublesome where the paper stock of the web to be dried contains a large amount of sizing. Attempts have been made to remove such matter during the operation of the driei's by applying a scraper which merely loosensthe coating and allows it to be redeposited upon the paper web. However, the particles so replaced on the paper web give the sheet such a spotted and unevensurface that this method of removing the coating is considered 1mprac'tical for the manufacture of the better grades of paper; Accordingly, it is the generally adopted practice to periodically shut down the operation of the driers in order to permit, the removal of the objectionable deposits.

Itis'my object to obviate the necessity for such deposits, and at the same time to prevent redepositing of the particles upon the paper web 'by providing mechanism adapted to scrape the adhering particles from the rolls andimmediately convey them away fromthe machine. y

* A further object is to provide a highly practical and efiicient device of this kind in which 5 the objectionable particles are removedby a 5 this kind construction adapted to facilitate the removal of portions ofthe paper Web from the hood when, as sometimes occurs, said web breaks in operation and to otherwise meet the practical requirements of operation by providing means for readily swinging the detion taken on the line 6-6 cylindrical at or near thcwet end of the machine.

shutting down the driers for theremoval of 1928. Serial No. 282,411.

vice to an inoperative position where it is out ofthe way.

Referring to the accompanying drawings, Figure 1 is a plan view of my invention together with the adjacent portions of a paper drier of common type; Fig. 2 is an end view of the device removed from the drier and showing the left end as seen in Fig. 1; Fig. 3 is a longitudinal section through the hood and connected end of thcair conduit; Fig. 4 is a detail, sectional view taken on the line ls-4 of Fig. 3; Fig. 5 shows the right, end of the device as viewed in Fig. 1, together with fragmentary portions of the drier upon which it is mounted; Fig. 6 is a typical transverse secoi Fig. 1 and Fig. 7 is an enlarged end view of the device and its support. p y

As illustrated my device is applied to a paper drier 8 and is preferably located upon one or more of the drying rolls The drier is of the common type provided with standards 9 at opposite ends ofthe several rolls. These standards 9 support bearings for the several drying rolls 8 as shown in Fig. 5. A pair of frame members 10 are secured at their ends to the standards 9 and are arched upward adjacentto the periphery of the roll 8 to afford supports for bearings 11. J ournaled in these bearings 11 is an angular casting 12 which carries on its free extremity a flexible blade or scraper 13 like the so-called ,doctor blades? in common use. This scraper 13 extends parallel to the axis of the drier 8 and substantially the length thereof so as to loosen fibrous particles, sizing and other objectionable deposits upon the peripheral surface of the drier when the latter is rotated, as in operation.

A hood 14 is arranged to extend longitudinally upon the casting 12 to collect the particles removed by the scraper 13. This hood caps or covers the scraper 13 and has an edge 15 which extends closely adjacent to the pe riphery ofthe drier 8 along a line parallel to and nearthe working edge of the scraper 13. The opposite longitudinal edge of the hood 14: is secured to a shaft 16 which is pivoted in a series of bearings 17 boltedto the casting 12. An end 18 of the shaft 16 projects from an end of the drier and is formed to be turned by a crank, wrench, or the like, to swing the hood to open or dotted lineposition shown'in Fig. 7.

Large mesh screens

19 and 20 extend transverse the hood 14 to prevent the passage of portions of the paper web, which sometimes breaks in the op- 3 hood 14 which overlaps the conduit 211s not flexible hose 22 adapted to communicate with a suitable motor driven suction pump or an (not shown). The hose '22 may be provided with a fabric cover which is heldin extended position by an interior, spirally WOUIlClSPITllIg V 23. A sleeve 24, revoluble on the shaft 16, is rigidly secured to the conduit 21 to connect the same with the hood 14. The end. of the directly connected thereto but is free to per init swinging the hood toopen position independently' of the conduit 21. j

7 It will be evident that one side of the hood 14 is open when the same'is raisedffrom the scraper 13, as shown in dotted lines in Fig. 7, but when the hood is closed, or in normal operating position, the otherwise opensideis closed by the drier 8, scraper 13 and supporting casting 12. Because of irregularities in cured to the'bottoin surface of the conduit 21, asshown in Fig. 3. These flaps are drawn in operation.

' To facilitate creating a draft longitudinally through the hood 14, when in operation, I

provide a small opening 27 in an. otherwise The extent of this opening may be adjusted by a small sliding door29 mounted upon the outer surface of the end 28. An arm. 3l0'is fixed on the shaft 16'to project adjacent to the upp'er surface of the casting 12 and in the extremity of this aim is threaded an adjust-f break Occurs when the paperflweb is beino, 5

ing screw 31.- Near the opposite end of the b another itdlustmg Screw 32 known in this art it isicommonpractice when 7 n the conduit 21 and arranged to bear against thecasting 12 at its lower end. These .screws 31 and 32 affi'ord means for holding the edge 15 of the hood 14 out of contactwith the drier 8, but in close proximity thereto, so that is substantially equal 'to the correspondingarea ofthe hood 14- and the several, intake openings in the hoodare of such size ast'o maintain the desired velocity of air for pickan, opening '01": the" desired size 'isprovided along theworking edge of the scraper 13. The cross sect onal area of the conduit 21 ing up and conveying away the particles of matter loosened by the scraper 13.

In use the hose 22 is connected to the suction intake of a motor driven fan or pumpof any suitable or well known construction so that a vacuum is created in the hood 14.

This hood, in it's normal operating position, is closed, except for the opening 27 and space between the edge 15 and periphery of the drier 8. The blade 13, which-is flexible, rests upon the periphery ofth'e roll and is adapted V to remove the objectionable deposit. The drier-roll 8 is operated in the usual manner and in the direction indicated by arrows-in Figs. 5 and 71 The deposit to be removed from the periphery. of the r0118 is. carried beneath the'hood'14; and is loosened by the blade 13. The particles thus loosened are immediately picked up by the draft of air enteringbetween the roll Sand edge 15 of the hood 14 and carried longitudinally through the hood intothe conduit 21 and hose 22, being delivered by. the latter tothe. power driven suction meanswhence they are discharged in a suitable place of 'disposal, -I-f,as seine timeshappens in the operationof a drier,

the paper web breaksand tends to winditself upon the roll 8*it is. stripped from thefperiphery, of the rollbythe scraper 13 and thereafter collects; in the hood 14. When' this occurs, the hood maybe readily thrown to open position, indicatedin dottedilines in Fig. 7 by manipulating the end 18 of, the

. 1 -:shaft 16. In open position the interior of the upper surlace of h Scraper T-the hood is readily accessible for theremoval. port, I prefer to secure on one end of the hood v 14 a flexibleflap 25 and a similar flap 26 is seof the broken portions of the paper web and such portions are prevented from entering the conduit 2lbythe-screen 2O. "After'the to closedposition y the Suction the hood'vv removal of the Paper from thehoodthe device may'be quickly returned to operating position without, shutting down the opera- Closed end 28 remote from the conduit liveredagainst the llQOd'WitllrSlllfiClGIlt force to automatically throw the same to open position.

Thescreen tical operation of the machine by confining the broken portion of the paperweb to the accessible end of the hood incases where the tailed. :into thedrier. Thus, asis well starting the driers to cut the end of the web upon an oblique line toform a tailor. relativelynarrow projection near the accessible side of'the'machine. When this projecting tail breaks and passes into the hood 14 it is confined by the screen19inthe end ofthe hood 14 where it can be most readily-removed.

Thefscreens 19 and 20 are d-esigned'to' permit the free passage therethrough of the particles 19 further facilitates the prac- "FA ed prevented from obstructing or entering the conduit 21 and hose 22. Obviously when the scraper and cleaning device are not required periphery thereof for freeing adhering particles from the peripheral surface of said roll of a hood capping the edge of said scraper in contact with said roll for collecting loose particles freed by said. scraper and a conduit for removing the particles collected in said hood.

2. In a cleaner for paper driers. a scraper extending longitudinally of a drying roll in engagement with the periphery thereof for freeing adhering particles from the peripheral surface of said roll, a hood extending V longitudinally of said scraper adjacent to the edge of the same in contact with said roll for collecting loose particles freed by said scraper, said hood having an intake opening for a draft of air adjacent to the line of contact between said roll and scraper and a conduit adapted to be connected to suction means for removing the particles collected in said hood.

3. In a cleaner for paper driers, the combination with a scraper extending longitudinally of a drying roll in engagement with the periphery thereof for freeing adhering particles from the peripheral surface of said roll, of a hood covering the outer surface of said scraper in spaced relation thereto for collecting loose particles removed thereby and an air conduit connected to said hood for removing said particles therefrom.

4. The cleaner specified in claim 2 in which said hood is pivoted upon an axis substantially parallel to the drying roll and means are provided for pivoting said hood to adjust the eflective size of said intake opening.

5. The cleaner specified in claim 1 in which said hood is readily removable from said scraper and provided with a side normally open when removed from said scraper.

. 6. The cleaner specified in claim 3 in which said hood is pivoted upon an axis substantiallyparallel to the drying roll for movement to open position and formed with a longitudinal opening adapted to permit the removal of paper web from the interior thereof when said hood is in open position.

7. The cleaner specifiedin claim 3 in which a screen is disposedwithin said hood to prevent the passa e of portions of the paper web into said con uit.

8. The cleaner specified in claim 1 in which said conduit communicates with one end of said hood and said hood is removable from said scraper independently of said conduit.

9. The cleaner specified in claim 3 in which said hood is pivotally connected to said scrap or and tiltable upon a longitudinal axis whereby said hood may be tilted away from said scraper and said hood is formed with a side normally open when tilted away from said scraper.

10. The cleaner specified in claim 3 in which said hood completely covers the working edge of said scraper and projects beyond the same in close proximity to the periphery of said drying roll and adjustable means for maintaining said hood in spaced relation to the periphery of said roll.

In testimony whereof, I have hereunto signed my name to this specification.

ARTHUR E. BROUGHTON.