US2645383A - Gluing apparatus with multiported applicator - Google Patents

Description

July 14, 1953 l. H. MILLER GLUING APPARATUS wrm mJLTIPoRTEn APPLICATOR ufff.

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e u 1 f .A 36 5 M5? 2 D Patented July 14, 1953 f-GLUINGAPPARATUS WITHMULTI'PORTED APPLIcAroa I.Ira H.; MillengjToledo, Ohio, assignor to' Owens- Illinois'Glass Company, a corporation of Ohio :..Applicationfnugust 31, 19.49, seriamo. 113,409

i:Mydinventionmrelates toiatlmachin'e Ionapplying measured quantities of;-v glue,- adhesive,l or similar .substance in 1 a liquid 'stata-.tof closure;` devices for bottles-mother-containers.

,In1 thefart as; commonlyfpracticed, the4 glue is led tothe closuredeViQesin-fsmall quantitiesifrom ffpot. kflntarliligV a.: Acomparatively 4margequantity 'z fof. glue, usually atazhghztemperature and ;under :faheadcf compressed` ain or; other gas applied. :to i-.the entire `mass ofrglue in. thepot. 'Ihis involves iarserioushazardz-r.and ismighlyobj actionable from a; f safetyrstandpoint; astheilarge =.v o 1ume:` cfa hot rxgluel undenfpressure couldccause :seyerefinluryto ran-operatorinlthecasevotpotailureiornegligence Y zon thefpartz ofstthe operator fzin-replenishingf `:the

Qadhesive. e

1 An obj ectzzofi` tha-invention is dzon. overcomethe liabovemotedpobgiection. I' attain `this...objectif-by c provi-dinge a mechanisms.v whereinxfthe glue V.pot

'vremainsxopenz tor.. atmospheric pressure andfin 2 1 which superatmospheriorpressurefisapplied Ato: a

.:chamber-containing:onlyfa fsmallzporton of4 glue c at: .any zone;A time,1r.after. tsuch; portion' .basi-been segregated from the massfofffgluerin:the.pot.

"k other objectswm" be impart apparent and 1n 25 t Apart-pointed out hereinafter. l Referring" to thei accompanying e drawings 'IFig. l'lsisafpart sectionalfelevationaoffrlthe machine `:with ther'glue applicator :inllfthe-neutrall vor nolfeedposition.

` '-FigL 2 :is aA sectiona1= elevationot fthe lower-half 1' pffthe `'gluehfeeder showingthe movingparts-Of the lfeederfin' the upper orfeed position. g

'fFig 3 @is .a-sectiorr at' the lineas-L3 "onf Figi 1.

. 'rfzneferr-ingwo 11mg: 1,f-rthe #framework offfthe' fff-'machine comprises affbase-'I I'I-and postf `I I rigidly attached-'fm1the'l'baseillu. Thef-fglue-fvpot `I 2f fis mounted `for up anddown and=lateral adjustment fon the-post I I` andishe'lddn adjusted `positionyby :means` of securing bolts.i |3. Glue -I4isf-fed`from f theV gluepot `I2 and*forcedinto'closureidevices byfmeans of a forced feed applicator `in theform of@ a `piston motorwhich' forms` archa-mber-to receive *the `segregated liquid and *dropper `head assembly. The` piston1 motpr-comprises a-cylindere assembly; andA a 4'sectionalfpston assembly. The piston" assembly -isreciprocated within-"the 'cylinder assembly, ffist admitting av smallquantityof 'glue,\"then*shuttingcolte/entrance of-"glue,

' andrial-ly admitting air: under `-pressure to force i the# glue foutl bi1-ther glue" dropper yhead` assembly.

` Piston motor "f The; f cylinder:iassen'ibly; eonslstsxofe .;anxintegral tube'extension I5 of the glue pot I2, an opening I Ii in-A the; floor of" the;` glue pot 12; an upward lextension vI 'IL ofthe;V glue p ot I2 `in' xedf connec- 'tion withM a cylinder I8. A1l-of-these elements s are-in' register. `A-:cap I9--Withan opening-lois 5 threaded tothe upperend of the `cylinder fl 8.*The cylinder yisprovidedV with suitable openingsfZI through thej-Wall" of the; ,cylinder I8 tothefglue V pot l12. A- pressure pipe :22 leading -toasuitable source of ainunder pressurel opensjntoithecylinder I8 'through a port '4.'3gabove` the "glueopen ings 2l. V

The sectional pistonl assembly consistsqof; an upper piston rod. 24 passingthrough-the opening in the cap` I9- and` threaded-to: an air-valve HL piston l25; anintermed-iate pstonrodz threaded to the air valvejpiston 1 2 5; at `its upper. endand to afglue valve pistpn'Z'I at its lower end; alower piston rod. 28 threaded at its upper `endto-'the .gluejvalve pistonl and providedwith apin 29 at its lower end. 'Ihe Space A between the valve pistons L25, andJ 'I .providesf an innenl chamber having its end and side walls formed bythe valve `Dstsi ns-and the cylinder `Wall respectively; so that the position Of .the chamber isshifted up .and down with 'the movementsof ,the pistons. v""Ijhe glue valve piston '21 is provided with verticalchannels 3 0. A coilspring 3I mo unt ed on'the upper ...piston rod 24 and heldunder compression between the airvalve .piston 25andi1the capv l 9, s ery es t0 30 hold theipistonsin their lowered position. 'L lfhe M upper piston rod 2l is threaded vto a suitable mechanism for causinga reciprocatnaaction. .In ibspreferrediorm this comprses a. solenoid. and plunger. I'he solenoid 32 ismountedby means .of a bracketkon anysuitablestationary support.

" Glue dropper head assembly A stationary` gluedropperhead 35 is attached 40 tothe glue Dot I 2 `bymeansof a ,coupling ,36 which has screwfthreaded connections. With A'the tube extension` I .'i, and ,the dropper head 35. The dropperhead istprovided-With glue discharge vorices 3l, and 1valve. seats .38 in which valves V39 may seat. AThe valves. 35iare loosely mountedjn -a A.valve plate 40.fand.held. therein bywsmallipins 401 (Fig. 3). Aspring 4L mounted onthe-hubof the `valve,. plate .40 1 vand held 4 under. :compression between.. said plate and the-co11pling 36,; `yield- 4ir-iglyholds the valves A35i-seated. The valve plate 4D is threaded to a shaft 42. The uppenportion i.of theshaft isof. larger diameters and tubular andtis also providedwthfvertical slots .43ainrwhich the pin -2,9.on. thef1ower; piston' rod f28.can move up and down.

.glue dropper head (Fig. 2).

Operation The operation is as follows:

As shown in Fig. 1 when the machine is in neutral position, the discharge orifices 31 are closed, the valves 3,9 being held on the valve seats 38 by the spring 4I. At this time the piston valve assembly is held in its lowered position by the spring 3|. The air valve piston 25 is closing off the air line opening 23 while the glue valve piston 21 is allowing hot glue to flow Y fi extension on the pot, van opening through the pot, an upper tube extension to the pot, a cylinder in xed connection with said upper tube` extension, all in register, said cylinder assem' bly having an opening to a source of gas under pressure and an opening through the submerged@ section of the cylinder assembly to the liquid, a

.l piston. valve assemblyconsisting of. a sectionalA I shaft, a 'solid-'valve fpiston, a valveipiston withi through the glue opening 2l into the space A between the valve pistons and throughthe channels 30 to space B, and thence to space C, filling the space D in the glue dropper head 35. As a closure device 44 is brought beneath the glue dropper head the solenoid is actuated by l suitable means (not shown) and draws the upper piston rod upward and with it, thevalve pistons. During this movement, the glue valve piston first closes the opening to the glue pot and then the airivalve piston opens the air port, thus admitting air under pressure to the small measured volume of glue trapped in the cylinder. During the final upward movement of the pistoniassembly the pin 29 which has reached `lthe topof the slots 43, lifts the valve plate and discharge Valves 39, allowing adhesive to ow or be forced out of the glue orifices 31 in the As the shaft moves down, first the spring. 4| reseats the valves, and then the air Avalve piston and the glue valve piston resume their neutral positions, thus completing the cycle.v

. Suitable means (not shown) may be provided for regulating the air pressure to any desired value, depending on the viscosity of adhesive .y used. .I have found that in some instances no channels parallel to its longitudinal axis, means for reciprocating said piston valve assembly and thereby alternately admitting gas and liquid, a dropperv including a head havingk a fixed connection to the cylinder assembly and having liquid discharge orifices, valves seated-in said orifices, a plate to which the valves are loosely connected, means providing a lost motion connec- 1 tion between the V`said plate and piston valve assembly permitting a limited up-and-down `movement of the latter relative to the plate. l 3. Apparatus for applying an adhesive in liq- *uid form toa plurality of articles in succession, said apparatus comprising and opencontainer for a supply body of the liquid, a dropper head comprising a chamber having discharge orifices, a

fcylinde'r, a valve assembly, mounted for reciproeating' movement within the cylinder and-in- 'cluding an" air valve piston and a liquid valve piston spaced to provide a pressure chamber, said f supplybody of liquid, 'said ports and valve pis-V air pressure is necessary. Suitable means (not shown) may be provided for heating the glue in the pot. Means may also be provided for heating the glue dropper head for heating or reguf lating the temperature of the glue passing therethrough. .v Modifications maybe resorted to within the spirit and scope of my invention as defined in fthe appended claims. I

V. I claim:V y

f 1. A liquid applicator comprising an open pot containing liquid, a rcylinder assembly partially submerged in said liquid, including a lower tube extension of the pot, the pot having 'an opening' therethrough, the walls of which form a part of the cylinder assembly, the assembly also including an upper tube extension to the pot, anda cylinder in fixed connection with said 'upper tube extension, allin register, said cylinder assembly having an opening to a sourceY of gas under pressure and an opening to the liquid in the open pot, a piston valve assembly .including a sectional shaft, a solid valve piston, and a valve piston with channels therethrough parallel yto the longitudinal axisfsaid cylinder having ank airport opened and closed by the reciprocation of the' air valve piston, and a liquid port opened and closed bythe recipro- Vcation of the liquid valve piston,'means for Vsupplying air under pressure to the said vair port, the liquid port being in communication with the vthe container being formed with an opening eX- tending therethrough, a` vertically .disposed cylinder in' register with said opening and formed pistons so arranged that the gas and liquid openings are yalternately opened and closed by the vaction of said pistons, yrnearis for reciprocating said piston Valve assembly, a liquid dropper comprising a head having a fixed connection to the cylinder assembly and having liquid discharge orifices, valves seated in said orifices'and actuated by the piston assembly in timed relation with the opening and closing of the gas and liquid openings.

2. A liquid applicator'comprising an open pot containing liquid, a cylinder Aassembly partially submerged in said liquid including a lower tube in partby the walls of said opening, a piston assembly mounted for up-and-downV movement within the cylinder and comprising a pressure valve piston and a liquid valve piston, said cylinder having a liquid valve port immersed in vrsaid supply body, said valve pistons being spaced tov providea pressure chamber lmovable up and down with the valve pistons, said port being positioned to openinto the pressure chamber when the valve pistons are `lowered and being closed by the liquid piston when the latter is in its upper position, said cylinder having a-pressure port positioned to be closed by the pressure valve piston when the latterv is lowered and'opened to said pressure chamber when the-valve pistons are lifted, a pressure pipe opening into said pressure p ort and through which gas under pressure is supplied to said pressure chamber, a dropper head comprising a discharge chamber having di-s- (charge orifices,'and,means providing a passageway extending from the pressure chamber to said discharge chamber.

` 5.- The apparatus defined inclaim 4, the said liquid valve piston being formed with channels extending therethrough, the passageway to the discharge -chamber being formedin partby said channels. l

56. Apparatus for dispensing a liquid" adhesive, comprising a vertically disposed cylinder, a piston assembly mounted for reciprocation within the cylinder, said assembly comprising a pressure control valve and a liquid valve spaced therebelow to provide a pressure chamber, means providing a passageway through which gas` under pressure is supplied to said chamber when the `being closed while the other is open, means `for reciprocating said piston valve assembly, a liquid applicator including a head having a iixed convalve assembly is lifted, means for supplying charge oriiices, means providing a passageway formed in part by` the cylinder and extending from the pressure chamber to the discharge chamber, means providing a lost motion connection between the valves and the piston assembly by which the valves are lifted to open position during the iinal upward movement of the valve piston assembly, and means for periodically reciprocating the valve piston assembly.

7. The apparatus defined in claim 6, the means for lifting the piston assembly comprisingv a power motor operatively connected thereto, and the means for lowering said assembly comprising a coil spring held under compression and exerting a yielding downward pressure on said piston assembly.

8. A liquid applicator comprising a cylinder having a gas port anda liquid supply port in` and comprising a gas valve piston and a liquid valve piston spaced apart lengthwise of the cylinder providing an inner chamber therebetween movable with the pistons, the pistons being 'A positioned toropen and close the ports in moving in said cylinder and thereby bringing the nection to the cylinder and having a discharge orifice, a valve seated in saidorice, and means connected to said piston valve assembly for actuating said valve to open and close the discharge orifice in timed relation with the opening and closing of said liquid and gas ports.

1l. A` liquid applicator comprising a cylinder having in its'side wall a gas port and a liquid supply port, said ports opening respectively to a source of gas under pressure and to a source of liquid, a Ypiston valve assembly mounted for movement within the cylinder and including aV solid valve piston 4positioned to open and close' the gas` port, a valve piston positioned to open and close the liquid port, said pistons being spaced apart lengthwise of the cylinder and thereby providing an inner chamber shiftable with the pistons, a sectional shaft connecting said pistons and so spacing them apart that one of said openings is closed while the other is open,`

i ing `and closing of the gas and liquid supply said chamber into communication with said ports alternately, one of said ports beingclosed while Vthe other is open, means for reciprocating said piston valve assembly, a liquid applicator including a head having a fixed connection to the cylinder and having a dischargeV orifice, and

means connected to said piston valve assembly for opening andclosing said orifice in timed relation to the opening and closing of said liquid and,

gas ports.

9, The liquid applicator as dened in claim 8, said source of liquid. comprising an open pot containing liquid, said liquid supply port being submerged in the liquid.

10. A liquid applicator comprising a cylinder having a gas port and a liquid supply port in communication respectively with a source of gas under pressure and a source of liquid, a piston valve assembly reciprocable within said cylinder and comprising a gas valve piston and a liquid valve piston spaced apart lengthwise of i ports.

12. A liquid applicator comprising a cylinder having openings respectively to a liquid and to a source of gas under pressure, a piston valve assembly reciprocable within said cylinder and consisting of a rsectional shaft, a solid valve piston operable to open and close the gas opening, and a liquid valve piston operable to open and close the liquid opening, said liquid valve piston having channels therethrough parallel to its longitudinal axis, means for reciprocating said piston Valve assembly and thereby alternately admitting gas and liquid to the cylinder through the respective cylinder openings, a dropper including a head xed to the cylinder assembly, and having a liquid discharge orice, a valve seated in saidforiiice, a plate to which the valve is loosely connected, and means providing a lost motion connection between said plate and piston valve assembly permitting a limited up-anddown movement of the latter .relative to the plate.

13. A liquid applicator comprising a chamber having in its side wall a gas port and a liquid supply port in communication respectively with a source of gas under pressure and a supply body of liquid, closure devices forming end walls of said chamber and including a closure device for the gas port and a second closure device for the liquid supply port, connecting means between said closure devices, means for moving the closure devices as a unit and thereby moving the rst mentioned closure device into and out of position to close the gas port and to move the second closure device into and out of position to close the liquid supply port, the closure devices being so positioned that the second closure device is held in open position while the first closure device is in position to close the gas port and by which the iirst closure device as it moves toward its port opening position, moves the second closure device into position to close the liquid supply port and thereafter opens the gas port Number while the liquid supply port remains closed,

means providing a liquid discharge orifice in communication with said chamber, and means interconnected with said closure devices for alternately opening and closing the discharge orifice in timed relation to the opening and clos- Y ing of said ports.

yimmersed in the body of liquid.

IRA H. MILLER.

References Cited in the file of this patent` UNITED STATES PATENTS Name Date 493,138 Wilkins Mai. 7, 1893 Number Number Name Date Gates Mar. 19, 1907 Yeomans Aug. 15, 1922 Kooperstein Oct. 10, 1922 Tunnel Dec. 2,6, 1922 Phelps et al Oct. 15, 1929 Lima Feb. 2, 1937 Officer, Jr. Jan. 25, 1938 Selitzky Dec. 12, 1939 Gobier Feb. 11, 1941 vGlass 'May 26, 1942 Williams Jan. 11, 1949 White May 2, 1950 FOREIGN PATENTS v Country Date Great Britain Feb. 22, 1923

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