US1999360A - Edge labeling mechanism - Google Patents

Description

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EDGE LABELING MECHANISM Filed March 23, 1931 2 Sheets-Sheet l INVENTOR 94 FF'OED E. \VEE:

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EDGE LABELING MECHANISM Filed March 23, 1931 2 Sheets-Sheet 2 ATTRNEY 'l'ATES PATENT Eta Gypsum Company, Chicago, ill, a r 1 poration oi Illinois Application March 23, 1931, Serial No. %,543

5 label to the edge oi moving strips of material, such as gypsum board.

In the manufacture of composition board, such 88 gypsum plaster and wall boards, it is custo form the board by depositing a plastic cumposition composed mainly of calcllned gypsum and water, between the upper and lower cover sheets of the board to be formed, and then i'olding the edges of the paper cover sheet about the plastic material to completely enclose the latter with paper. The board is allowed to set while it is moved continuously, is then cut into lengths and passed through a highly heated drying kiln which serves to completely dry the board ready for shipment. The temperature oi the drying hiln is usually so high that there is a tendency to recalcine the gypsum in the edges of the board, thm melting the edges rather weak and having a poor bond with the paper.

I desire to apply a narrow label in the form of a continuous strip to the edge of the composition board. This label carries sales indicia. such as trade marks, patent numbers, etc. It is important that the label be exactly positioned on the edge oi thebcurd so that it will not extend beyond either face of the board. It is also essential that the strip be firmly attached to the board by suitable Mi: ie the boards are usually only to in thickness,1 have found that the addition of the strip'label serves materially to retain the moisture in the edge of the board and preventrecalclnation of the core material. in applying the strip label, it is desirable that a continuous supply of the label strip be maintained so, that unlabeled board will not be produced. v

An object oi invention, therefore, is to provide an appears for applying a continuous strip of labeling mate to the edge of composition boards which are manufactured in continuous strips.

Another object of this invention is to provide an aptm oi the class described which will position the labs strip accurately on the edge of the board and will also insure a continuous supply of the strip material.

A further object 01 the invention is to provide a method of retaining moisture in the edges of thebcard while the board is passing through the dryh s so as topieventrecalclnation oi the core matl in the board; also toimprove the plaster. boardsand strip labeling apparatus in other rets hereiter specified and claimed.

ierence is to be had to the accompanying drasis forming a of this specification, in W Fig. 1 is a plan view of a plaster board machine with my improved edge lube apparatus in place,

Fig. 2 is a side elevation oi the apparatus is in Fig.1,

Fig. 3 is a. sectional elevation through the apparatus taken on line 3-3 of Fig. 1,

Fig. 4 is a sectional elevation through the apparatus taken on the line l-4 of Fig. i,

Fig. 5 is a sectional view through the signalling apparatus taken on line 5-8 c! Fig. 3,

Fig. 6 is a sectional elevation through the wetting pad taken on line 6-4 of Fig. 2.

Fig. 7 isa view similar to Fig. 4 but showing a modified form oi apparatus for making a narrow width board, and

Fig. 8 is a fragmentary perspective view of a portion oi a pressing shoe.

Plaster board or other composition board to .which the edge label is to be applied, is usually composed mainly of a core w of gypsum or other suitable cementltlous material, said core having an upper cover sheet ii on its uppersuriace,

and a. lower cover sheet ii on its lower surface. The lower cover sheet I2 is preferably provided with an upward fold l3 and an inwardly turned told II on each edge, the mm H preferably under? lying the outer edge oi the cover sheet H and being adhesively attached thereto. The outer edge or the cover sheet it may be chamiered or provided with a feathered edge i1 desired to make a smooth face board. After introducing the plus-- tic core material l9 between the cover sheets II and II, the former plaster board strip is allowed to pass a considerable distance to give time for the plaster or Paris to set in solid form. During this setting period, the plaster board is carried by a belt it supported upon idler rollers, i6. the latter being mounted upon shatts ll which are rotatably supported in bearings ll on framework it.

After the continuous strip of plaster board has set to solid form, and before it is cut into suitable lengths and passed through the dryer. the edge label 20 is applied to the edge of the plaster board on top of the fold ll. This edge label is usually or in width and is supplied in the form'ot a roll it of comparatively Large diameter. The inside oi the tape is ed so that only wetting of the summed surface of the tape is required before pressing it into contact with the fold l3. Roll 2! is preferably supported at its center on a hub 22 which has a. restricted, threaded section 23, the latter passing through a sheet of insulating material 24, such as laminated, phenolic condensation products. The section 23 also passes through the center of a disc of insulating material 25 and is provided with a nut 26 screwed on the threaded section so as to seon f.

1% are mounted to rotate with the section it, the rotation caused by the tops it being continuously unwound from the roll ii, a. friction contact existing between said roll 28 and disc 24.

A 3201i; 2S ,0- (SO-X1811? through the hub 22? and is provided with a tiiresdeol section 29 of reduced diameter, which passes through a disc of insulating material so, being secured thereto by e not ti. The outer edge oi the disc 36 is preferably secured by screws 32 to s metal plate the .w': being so proportioned that an apprecinbie clearance between the disc is and plate $3 is maintained at all times to avoid friction contact therebetwcen. The plate 33 is preferably inclined at en to to the horizontal as seen in Fig. 3, beins\supported by a bracket 8E5 connected to said plate by suitable bolts Sill. The bracket 35 is secured to main longitudinal channels 3? of the board machine by moons of bolts 38. The plate 33 is preferably oblong in shnpe so that two of the discs 26 and rolls 2i may be mounted upon each plate. when one roll is exhsusted, the second roll may be ately connected in to supply the tape to the edge of the plaster board while the first roll is being replaced.

After the tape or label strip it leaves the roll til, it around the small idler pulley 4B which is rotatably supported upon the plate 33. The tape'must now be wet on its cued surieceto render said surface sticky, and for this purpose I provide a wetting pad ll of felt or other suitable fibrous material. said pad being retained in a rectangular shallow box 2. having a loose fitting cover it. The box 32 is preferably in the form of an angle having the horizontal legs it thereof secured to the plate lit by means of bolts 35. The lower wall oi the box t? has sent out portion All which serves to permit the summed surface of the tape 'to contact directly with the fibrous material 5! and also permits any excess wetcr to drain away. The water for mo stening the fibrous material ii is supplied through a pipe so screwed into the bottom of plate so, said pipe being connected to a liquid measuring device so of standard design, saiddevice preferably being of the type coonly used as oilers for machinery.

' m measuring device mey consist of s. glass cylinder so retained between caps bl, s central tube 52 having s. lower orifice es, passing downwcrdly through the upper cap 55. An adiusting head so connected to the upper end 0! the tube 52 outside the cap bl is knurled to permit manual rotetion oi the tube 52 so us to rote the amount oi water flowing out of the orifice W. A lever to is also associated with the upper end or the tube or for opening or completely shutting theortfice so if desired to stop the flow of water. A sight glass 51 is provided in the pipe as below the bottom cap 8i so that an observer can see the rate of flow or dropping of the water from the measuring device. A water supply pipe 66 is also connected to the bottom cop M, being provided with a filter 82 carried by a suitable supporting bracket, and also being provided with s. shut-off valve 62 and a drain cock to. In this wsy a measured quantity of water is supplied to the fibrous pad ll at a uniform rate of fiow. It should be \mderstcod that my apparatus may be spoiled to both edges of the plaster board in which pose a branch supply pipe fib'will also pass underon its surmosses face, it passes inwardly toward the edge of the board and is firmly pressed thereon by means of a shoe '8. This shoe Si is provided with a plate l'l lying above the plaster board edge and is also provided with a, U-sheped plate 67a connected by bolts 68 to a horizontally extendins bar ll so so to slidably support said shoe on said bar. Where the tape as first contacts with said shoe, the latter is provided with a rounded shoulder "a, (Fig. 8) and flanges 68b on each edge of said shoe which serve to define the path 0! the tape so as to accurately position the tape midway o! the edge of the board. A washer I0 serves to confine a. spring 12 between said washer and the plate 81a. The washer it! bears against a bracket I4 welded to the rod 69, said bracket being pivotally supported on I a pivot bolt' I6 secured to vertical standards ll secured to the main channel 81 of the plaster board machine. A stop bolt 18 is secured to each standard 11 so as to engage the outer end 0! rod 69 and limit the counter-clockwise movement of said rod when the shoe 88 is lifted away from the edge of the board for cleaning, etc. After the tape passes beyond the shoe 66 a brush so contacts with said tape so as to aid in firmly and adhesively attaching the tape to the edge of the plaster board. A second shoe pressing device may be provided beyond the brush Bil is desired so as to further insure a firm application of the tape to the edge of the plaster board.

After the tape has been applied to the plaster boardedge, the plaster board passes forwardly to e. cutting knife 0! standard design which is adapted to cut the some to desired lengths. These lengths of plaster board then pass through a drying kiln having highly heated air moving at a high velocity to dry the moisture out of the plaster board. Owing to the temperature of the kiln, it has been previously found that the gypsum core material in the edges of the board tends to recalcine, thus making the edges weak and destroying the bond between the paper and the core. However, I have found that when the tape is applied to the edge of the plaster board, it serves to retain the moisture in the board core and prevent recalcination, producing boards of superior quality having ottractive edges bearing the trade mark and other indicia which I desire o a ply.

In order that the board machine operator may see from a distance when a roll is exhausted. I preferably provide a signalling device in the form of e. standard electric lamp 8| which is in circuit dflwith a source or electric current. The ends of the circuit 82 are connected to terminal posts t9 and as which are preferably oi metal and are provided with wire connecting screws 85 in their outer ends. These terminal posts 88 and 84 are preferably hollow to receive annular brushes ll which bear against contsctsegments 81 and I! which are mounted on the insulation disc 25. The brushes '0 are resiliently urged into contact with the segments 81 and 88 by means 0! coll, compression springs 89 contained within the terminal posts N. As seen in Fig. 5. the segment 81 is greater than 180 degrees and the segment 88 is less than 180 degrees, so that when the brushes are in the position shown in Fig. 5, the circuit is closed and the lamp 8! is lighted. Insulation pacers 90 are interposed between the ends of the cements l1 and ll so that when one of the brushes 86 contacts with the segment 88 andthe other brush contacts with the segment 81, the circuit is broken and the lamp Bl coca out. It

' light flashes slowly, and vice verse.

When e nerrow plester board is to be monuiactureds spacer sleeve 932 (Fig. 7) is positioned on the rod. till oeuween'the spring l2 end plate tile so as to maintain sulcstentiollythe some pressure of the shoe ogoinst the label strip to. i

in operation the rolls or paper M are placed with their center co-exiel with the hub 22 and with the foce of the roll resting upon the rotary disc M. The paper strip til unwinds sind passes with its summed surface in contact with the fibrous pod ti which is supplied with water from the measuring device The moistened paper then passes under the shoe lit which is pressed inwardly by spring it to cause the moistened surfece to press firmly against the edge of the plaster board. A brush til then sids in securing adhesion between the tape and the plaster board and on second shoe tit presses eeeinst the tape to complete the adhesion thereoi..- As long as the roll is not exhausted ond'lreeps rotetine, the lump or continues to flush intermittently due to the action of the brushes so on the contact segments d! and lit. When the roll is exhausted, the lump ea eitherstovs lit or goes out, indicating to the operator that the second roll of paper carried by the plate 323 should he applied to the edge oi the plaster board.

if desired, uneummed strips of paper may he used and the adhesive liquid applied by means of the fibrous pod ill. The label many also he epplied to the looerds after diving, if desired. When the hoards are stocked in face to nice position, the label strips sppeer on the edges of the board and give the product on ottrsictiveuppesroncc.

I would state in conclusion that while the illustrated example constitutes s proctlcel em bodiment of my invention, i do not wish to limit myself precisely to these details, since manifestly, the some moy be considerably varied Without do porting from. the spirit oi the invention us deilned in the appended claims.

Roving thus described my invention, I claim as new and desire to secure by Letters Potent:

l. In apparatus for applying strip rnotei'lsl to the edge of wellboard or the like, moons for supportnie; eiroll oil strip ureter-lei, menus for rendering one face oi sold strip udhesive, end menus for pressing sold strip upoinst sold edge, including o non-rotating slow member hearing against sold edge, resilient menus to constontly urge sold shoe egoinst scold edge, and 2 rodshop-ed element of suhstontiul length slidnhly supporting sold shoe, the length oi soid rod-shaped clementpermittine" adjustment oi snid shoe to accommodate varying widths oi moteriol to which the edge strip is applied.

2. In epperetus oi the close described, moons for exerting o resilient pressure, comprising a rodshoped member pivotelly mounted adjacent one end, is pressing element slidobly carried by said member, and resilient moons for mointeining pressure on so id pressing element in operution.

3. In opporetus of the clues described, moons for exerting e resilient pressure against the edge of an object, comprising a, rod shoped member, s. pressing element slidably carried by sold member, means on sold pressing element adopted to lie upon said object and define the relation of the pressing element to said edge, and resilient means for maintaining pressure of the pressing element against said edge.

4. Menus for pressing it strip or? materiel against the edge of o fist, moving object, comprising e port member, a smooth pressure edge, means overhanging sold edge and adopted to rest upon the object operoted upon to define the relation of said edge to the edge of the object, and on integral guide formed sdjecent sold shoe edge for guiding strip materiel to pass between said shoe edge and the edge of sold object.

6. In apparatus oi the clues described, moons for supplying strip muteriol, and means for press" ins said strip against on object, comprising o. pressing element slidehly carried by n rod-shoped member of substantial length, and resilient means for urging sold pressing element against sold object, the length of sold rod-shaped element being such as to permit operation upon material of varying dimensions by slidolole edjustment of sololpresslng element.

7. In apparatus of the class described, means for supporting a moving sheet of wallooord or the like, moons for supplying a strip of insteriol for application to the edge sold sheet, end moons for pressing seid strip oeoinst sold edge comprising e rod-shaped member mounted for vertical pivotal movement on sold supporting means, s pressing element slldeolv curried by sold rod-shaped element, and moons for intoinine seid pressing, element in pressure relotlon to sold edge.

8. In opperotus oi the close described, means for supporting e moving sheet or? wsllhoerd'or the like, tees for supplying u strip oil materiel for application. to the edge ol sold sheet, means for pressing sold stripoeuinst sold edpe comprising s rod-shaped member mounted for verticol pivotal movement on sold iuipportine moons, o. pressing element slideihly curried loy sold rodshaped element, moons tor intoinine sold pressing element in pressure relotion to sold. edge, end moons for limiting the pivotol movement oi sold rod-shnped member.

9. In con-demotion with u lioord iormine inochlne, moons for epplvine; e. strip oi motel-lei to the edge of e moving ooerd sheet, sold moons comprising o. piste member secured to the edge oi the board corner end extending slontinelv upwordly oncl inwordly of sold cerrier, means on sold plots for rototehiv receivingn. roll of sold strip materiel, end means for epplyine sold strip to sold hoard edge, the angle oi. sold piste mornleer relotive to said board sheet being" such as to permit free movement of sold sheet thereunder as well as to permit ready accessibility for changine rolls or the lilre.

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