US2251659A

US2251659A - Valve bag filling spout means

Info

Publication number: US2251659A
Application number: US302081A
Authority: US
Inventors: Robert P Bushman
Original assignee: MODERN VALVE BAG Co
Current assignee: MODERN VALVE BAG Co; MODERN VALVE-BAG Co
Priority date: 1939-10-31
Filing date: 1939-10-31
Publication date: 1941-08-05
Anticipated expiration: 1958-08-05

Description

Aug. 5, 1941. R. P. BUSHMAN VALVE BAG FILLING SPOUT MEANS 7 Filed Oct. :51, 1959 m w m f 7%; W W ATTORNEY;

Patented Aug. 5, 1941 ior ms verve. BAGFILLING sPou'r Robert 1P] Bushman, Allentownfila; assignor -to Modern Valve-Bag lIom-pany, 5 Allentown, -"Pa., .;a. corporationiof. Delaware 7 'Ap'pIicatienOct'ober s1, i'939;.seria1No:s02,ts1

' 5 Claims. (craze-4's) Thisdnvention' relates to a new .anduseful im when Ithedevice.is..attached,..or.. cloth bags, whemln l itis removed.

"The valve bags used on the machine are entirelyclosed except for. a close .fitting. valve opening. into whichthelfillingspout. is'. inserted .for'in- ..troduction.o .mater'ialinto"thebags. LThe .mate- 1,5 Lrialis' .fedinto" .thebag'slat: a relativelylhi'gh veloc- .ity' to. attainithe'. desired. speed. oro eraaon, and, dueto Ithe -f eed.impeller..action, becomes admixed with -air; I.he-noe.- a substantial volume. or air. is 'introduoed .into '.the .bags an .ther'efrom .duringLthe fillingoperation. -iWhen .porous' bags, such as .I cloth. or fabric, are being filld this air can. readily escape byfiltering v-th1-'ough...the texture 'of the bagsl'themselves.

.' Since. .this..filtering.- action removes. substantially 5:3 1

all .of .thedustlfromlthe. escaping air, it .is 'desir'able to have the air pass out through the-walls ofporousbags. rather than. escape aroundthe .Ifilling. spout. by means on 'thevalve opening,v for .theLl'atten meansof. escape would allow a; great quantity... l-dust'l to? be. exhausted along with the .ai-r. It .is, '.therefore, advantageous to assure that .'thevalve.wallsoffthe cloth bags fit tightly around the outer .--su'rface-of the? filling spout. In any .event, Icloth-lbags' haveall beenmade w openings wl'iich-areoffjust thev proper size for insertionover' the. conventional spout; and since llthese lbagsuare repeatedly .used, .present filling .machineamust' bev capable of handling them.

It ofterihappens, however,3that machines'use =for.filling1 ..'cloth bags are also desired to be .used iOLfilllng. bags made of. relatively air imperviousrmaterial such as'paper or theJike coated or impr'egnated' with asphalt, .from which the. en- ..trainediair must escape through .the'slight s between .theffilling. spout. .and bag valve .open- '...ing. .lAlongwithi this air necessarily goes an.appreciable amount of suspendedpulverulent ma- A terial, scsthat the resultant dustis not only. ob-

noxious and..highly injurious to the health of. the 50 "t operators but...is .ldetrimental to the maintenanceofithermachine soils the outside ofthe-bags, andis wastefulinlthe loss of. material.

:-:I nthe past; to overcome! thisldi'fiiculty. .when filling imperviousprovidedwithexternal ribs or other means. (such j .as disclosedin the. copending application: offFritz W. Haver, .Ser.-No...i240,891, filed! November 17, (1938) whichjdilatejthe walls of the bag valve and .preventthemifromiformin a sealing con- .ta-ctwiththe' exterior surface of the filling'spout. Qsuction'. and fdust recovering means have also ..been.provided. inrconjun'ction with .these Valve ..di 1ati ng;means.-.So as to entrap the escaping air and dust. .TWhile such a device is'very. satisfac- .toryfforfilling. paperand the like bags,it is very disadvantageous, for the reasons already stated, .whenused with cloth or porous bags, andin order to .provide' an economically. satisfactory device tor.,selectiveuse. of ,both and paperbags it is .necessarythat/the operation of. the machine be .not' interrupted for. any appreciable time. In other words, the air impervious bags are provided with v'alve openingslarger thanth'ose. of .the cloth dmustbeexpelled ziaf bags and are -thus adapted to accommodatethe dilating means in addition to; the: normal spout diameter; while the 'clothibags are only adapted for the normal spout'diameten. Accordingly, in

. order for. a given machine to fill both types of "bags, it' is. necessary to .have 'two' forms" of filling spout means, and desirable .to. have a rapid transformationLfrom one to the other.

It is the. object of this invention, therefore, to provide a.bagfil1ing machine'which may be eas- ,3o .ily andrapidly altered for the selective useof paper or cloth bags" as desired. It is a further object. of. the invention to provide acomposite .spoutstructure adapted for thispurpose' and so constructed and arranged that it may be proith valve 35 duce'd at' a small. cost and withstand long use without rep air.

f The invention consists in the novel features, arrangements and combination of parts embodied by way oi'example in the apparatus hereinafter d 40 described as illustrating the preferred form'of the invention, and the invention will be more particularly pointed outinthe appended claims.

Further'objects and advantages of the invention will more fully appear from the following pace 45.. descriptionv taken in connection with the accom- 5 panying drawing, which shows, by way of exambags, thefillingspouthas' been ple, the-preferred embodiment of the invention. Referring to the'drawing in which the same reference. characters indicate the same parts in he various views: "Figs. 1 and 2 .are,.respectively, a side elevation and an end elevation of thecomposite fillingspout structure embodying thenovel features of my..inv.ention,and

LFig. 3, is .a cross-sectional view taken at 3-3 of Fig. 1 showing in more detail the manner of attachment of the component parts of said structure.

In the drawing above briefly described, the numeral l denotes a conventional type of filling spout towards the inner end of which there is a circular flange 2, by means of which the spout is fastened to the machine by bolts passing through each of the holes 3 in the flange and into a plate (not shown). The remainder of the machine is of the well-known type and need not be described herein. When in filling position, the extreme inner end 4 of the spout is in aligned communication with a feed throat from which the pulverulent material is discharged into the bore 5 of the spout.

Attached beneath the spout l and towards the inner end thereof is a spacing member in the form of a shield or trough designated in its en-' tirety by the numeral 6. When the spout and spacing member are inserted into a bag, the bag valve fits snugly and surrounds them, the exterior end of the valve extending practically to the flange 2, thus covering the openings 1, and the sides and bottom of the spacing member 6. This shield thus surrounding the lower portion of the spout extends up to the flange 2 and has a downwardly extending tongue 8 which protrudes through a cut-out portion 9 of the flange. Thus the shield in conjunction with the spout defines a passageway Hi through which air and dust entrapped within the bag may be exhausted by suction means (not shown) communicating with the passageway IE] exterior the flanged cut-out 9. The member 6 is preferably imperforate throughout the portion between the rear holes I and plate 2, to thus provide a restricted passageway at the point where the member passes out of the bag being filled. The openings I provide a means for removing any dust which may remain within the passageway I!) after the filled bag .is removed.

The method of attaching the shield to the spout is shown in Figs. 2 and 3 of the drawing, in which the convex inwardly directed beads ll formed on the longitudinally extending trough edges of the shield fit into the cooperating concave grooves I2 which extend longitudinally along and on oppositely disposed sides of the spout. Due to the partially resilient nature of the material, such as steel, from which the shield is formed, it may be readily and instantaneously forced upward against the spout until the beads II resiliently snap into their respective grooves l2 which they grip with sumcient firmness to prevent them from becoming accidentally dislodged during the regular operation of the machine. It is obvious that the longitudinally disposed attaching means need not be continuous (though preferably so) but may be interrupted, i. e., instead of a continuous convex bead l! and cooperating concave recess 12, a plurality of longitudinally disposed protuberances and cooperating recesses may be employed.

Whenever it is desirable to use the spout alone, as when filling porous bags, this resilient method of attachment permits the shield to be easily and rapidly removed by applying a downward pressure thereto. This ingenious method of attachment enables the device to be automatically locked in place below the spout by merely pressing it on, no other adjustments being required; or in the alternative it may be dispensed with by reversing the direction and pressure which causes it to snap away from the spout. Also the construction and arrangement of the parts are such that rapid and economic manufacture is permitted and substantially no upkeep service is required.

Having thus described my invention with particularity with reference to a preferred embodiment of the same, it will be obvious to those skilled in the art, after understanding my invention, that changes and modifications may be made therein without departing from the spirit and scope of the invention, and I aim in the appended claims to cover such changes and modifications as are within the scope of the invention.

What I claim is:

1. In a valve bag filling machine for feeding pulverulent material into a valve bag, the combination of a horizontally disposed filling spout for receiving a paper or like bag to be filled, and valve spacing means comprising laterally spaced longitudinally disposed attachment means detachably securing said valve spacing means to the spout along laterally spaced longitudinally disposed portions thereof, said valve spacing means having an imperforate rear portion positioned beneath and surrounding a portion only of the periphery of the spout adjacent the mouth the the bag being filled so as to provide a passageway defined by the lower portion of said spout and said spacing means and serving when inserted into the valve of a bag to maintain the valve in spaced relationship away from the lower portion of the spout area lying peripherally adjacent thereto.

2. In a valve bag filling machine for feeding pulverulent material into a valve bag, the combination of a filling spout for receiving a paper or like bag to be filled, and valve spacing means positioned longitudinally along the spout and surrounding a portion only of the periphery of said spout, said spacing means and said spout being so constructed and arranged as to provide a conduit therebetween for directing material vented therethrough rearwardly at a restricted discharge zone, longitudinally extending laterally spaced cooperative securing means formed respectively on the spout and on the valve spacing means so constructed and arranged that the latter resiliently grips the former.

3. The combination of a horizontally disposed filling spout member for insertion into the valve of a bag to be filled, a removable elongated shield member having a bottom, sides and an open top providing longitudinally extending upper edges attached to said spout surrounding and spaced from a lower peripheral portion thereof, said shield member in conjunction with said lower peripheral spout member portion being so constructed and arranged as to define a passageway adjacent said spout member for conducting air and dust from out the bag at a restricted discharge zone beneath said spout, cooperative locking means located respectively along oppositely disposed longitudinal portions of the spout member and along the longitudinal upper edges of the shield member, said locking means comprising a set of oppositely disposed tongue portions on one of said members resiliently held into engagement with a corresponding set of groove portions in the other of said members.

4. In a valve bag filling machine for feeding pulverulent material into a valve bag, the combination of a filling spout for receiving a paper or like bag to be filled, a longitudinally extending shield like member having a bottom, sides and an open top providing longitudinally extending upper edges attached to said spout at either side and said member encircling the lower-peripheral portion thereof so as to define between said spout and shield an exhaust conduit through which dust and air in the bag may escape, locking means located on said spout and on the said upper edges of said shield for frictional engagement with each other, and means formed in said shield for venting the lower walls of the bag valve.

5. In a device of the character described, the combination of a filling spout for insertion into the valve of a bag to be filled, and a removable shield attached to said spout to define a venting passage between the respectively adjacent walls of said spout and shield, said shield being in the general shape of a trough providing spaced apart longitudinal edges having cooperative engaging means for snap-on engagement with said spout, said spout being provided along opposite sides with longitudinally disposed means for cooperative engagement with said means provided on the longitudinal edges of said shield, whereby said shield may be readily and quickly secured to and removed from said spout to thereby permit the selective use of either cloth or paper bags on the same device.

ROBERT P. BUSHMAN.