US1940601A - Vent plug - Google Patents

Description

Dec. 19, 1933.

H. E. MCCRERY ET AL VENT PLUG Original Filed Aug. 13, 1930 Ma If n M E w m 445/5975 JmEA? wwm -- epenin s' 27. operat en obviouslyj will be revers d contraction of the material, thus for i the shipment of special lacquer compounds Theoperationof the device is as follows:

Assuming that the drum is to be filled with mo- 24 may be inserted in operative position either before or after the application of the plug 14 aswill be apparent, The recess 161is of substan -tial size and" forms an expansion chamber when t the temperature of the molasses rises. 1 Obviously the drum isnot completely filled with the molaschamber 16, forms an ample expansion space-for themolasses. When such ekpaiisiontakes iece, 5

, air will be expelled upwardlythroughtheopening 21, through the fabric 22, and thus to the atmospherethrough the chamber 26 and vent permittin air {to flow into {the drum and prevent'the creation 'oia parallel vacuunitherein; In practice, the drum preferably vis provided with enehf theuevi'ces ill the headof the drum 7 :and in the side, and when the-drum stands on end," theescapecr air 'takesblal" through the vent 'pmg in-the head or the drum; It has been fouhdithat no escape of the. liquid will take place threughth vent plug j int the sit e'efjt e r drum,sincejsuch escape-is prevented by the vi's- Sher without the esca ee: material ,thei'efrorri, -main plug threaded in one wall of thecontainer cosity er the molasses. when theurum 'sta'nds l enit siu t e side vent is rolled to th'e'top of the terpermit; the e cape 'of r upon the expansion qf; the mola ses and the escape of the.

molasses through t e vent plug in the head. will be jprevfnted by the viscosity of the material which" prevents it Item sowing through to} screening element. Thusit will be 'apparent that the drum readilyjmaly be handled in any manbut xpansion hhd eehtraetien of t e material drum inmeithe'r hf fthe 'hdrriial pesitions re- As previously'stated, t e fabric aisks'zz may be thibf dberidihg "upon the nature" or the terial in the Eitherploth or. wire fabric,

ho ver, will notiseal the; drum to the atmosphere, anaysuehseeung is'i'mport'ant when' the t e'ontainer is em loyed forshipping materials such as lacquers whichfoxidize readily in thepresence jfifo'ri the reason "stated, the form of the device illustratdin Figure 335 preferred when the container is u sed for shipping lacquersfand other- "o'xldizable materials. The mbber 'dis '28 i pierced'in a number of places wit-ha needle-like instrument, and "each opening 29 closes upon the withdrawal ofthe instrumentreferred to.

cas -thermal conditions therefore, material in atdr inrifprovided with the form of the device shownin l 'igure 3 will'be :sealed from the action o'f the atmosphere; Upon theexpansion of the material, however, pressure will be created in lwardly toperniitair to escape through theopenings 29. V

It be appatent that device extremely simple in construction andg operation. and does not requirethe provision offvalves orother means the drum which willfiex the rubber disk up for preventing the escape of the material in the drum. In practiceit has been found thatthe device is eflicient for permitting the expansion 'in the drum are subject tothe vaporization of one ormore of their constituents, and the chainbars 16 and 26 form condensation chambers for the vapors arising from the material in the drum.

In this connection it will be noted that the mav ijterials tend to drain downwardly along the sides ses,and the'small air space between the surfacebfl the molasses and the head 12,together with'theof zthe chamben'25, thus preventing the ven openings 2'? from becoming clogged.

Aspr-eviously stated, the device is particularly adapted for use with metal shipping drums, al-

'.though it obviouslyis not limited to such applica- "tion but may be used with shipping containers of other kinds. -It will be noted that the vent openings 2'7 *o'fthe' auxiliary" plug assoeiatewith the head of .the drum are arranged above the upper limit of the seam 11. "As previeuly stated,

water sometimes' collects"onthe headjof" the'drum, and the; arrangement of the vent openings 2'7 above the seam llfprevents waterffrom-drainlng taken as preferred examplesof the same and that various changes in the shapes, S eena arrange mentiof parts may be resortedto withoutjdepart ing from the spiritxof theinventionor th Scope orthe sub joined-cla ims.

* Wecla'im: V li'The combination "witha container, 'oi a and divided intermediate "its up er. andflower ends byfan integral wall, 'said'mainplugfbemg m provided'in its upper and lower faces with rela tivelvlarge' recesses ithe lower of which com- 'municates with the interiorof the container, said wall having "a relatively small opening therethrough, 'a member arranged in said upper recess 25 tainer u q the expansion and contractionpf the v materialin the container, and 'anauiriliary plug threaded in said upper recess jand operative for retaining said member in position, said auxiliary 'plii'g heing'provided in its lower en'dwith a relatively large dome shaped internal recessop'en to 185 said member, said auxiliary plug being further "provided with radial .vent openings communicating with said internal recess substantially atthe topthereof/ 2 A vent deviceforcontainers comprising 'a @MO mainplug threaded forieceptionin' an opening in one wall of the container and providedwith an integral wall intermediateits'upper andf-lo'we'r fends isaid main plug being provided ewens, v below said :wall with relatively largef'recesses the latter of whiohi co'mmunic'ates with the interior oiithe' contaiherpsaid wall having a" relatively sm v n h re hr h; m mber mens s in saidupper'frece'ss against sai'd wall and'havi'ng openings "therethr'ough -sufficiently small 'to pre i J the containr' but adaptd topennjt the pdsshse position, saidauxin plug lbeinsi p f vid eqfin its ,a I,

of air to and from the container, upon" the; expension and contraction ot the-material therein, and an'aux illarypluglthregded in said upper iejce'ss und"= operative for retaining said member ,in

iliary plug beingiurther provided with a plurality of radial ventopenings communicating with said internal: recess substantially at'the'top thereof.

HAROLD McCRERY.

ALBERT usn ll I

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