US2028107A - Method of and means for sealing containers against leakage and tampering - Google Patents

Description

Jan. 14, .1936. Q E, E; HAN 2,028,107

METHOD OF AND MEANS FOR SEALING CONTAINERS AGAINST LEAKAGE AND TAMPERING Filed Aug. 25, i 1950 Patented Jan. 14, 1936 PATENT. OFFICE 2,028,107 METHOD OF AND IWEANS FOR SEALING CONTAINERS TAMPERING AGAINST LEAKAGE AND Edgar E. Shanor, Sharon, Pa., assignor to The Petroleum Iron Works 00. of Ohio, Sharon, Pa., a corporation of Ohio Application August 25, 1930, Serial No. 477,722

2 Claims.

My invention relates to containers such as metallic barrels or drums mainly intended for shipping petroleum and other volatile products and more particularly to scaling provisions for the reception and discharge openings.

The effective sealing of volatile liquid containing packages is quite a problem inasmuch as there is objection, because of the fire hazard, to the use of soldering, welding, or other processes requiring the application of heat. Manifestly, then, resort must be had to sealing expedients which do not involve the risk stated. The conventional screw fittings suffer the disadvantage that they have a tendency to work loose especially in extremely hot countries, as for example, equatorial Africa. Hence, breathing obtains with resultant losses of volatile liquid, and water is sucked into the package when the drum, following cooling, is under partial vacuum. In order to correct this deficiency of the screw fitting it has heretofore been proposed to combine with it an inner seal, but aside fromother disadvantageous features it had to be applied before the drum was filled, and, hence, was not practicable forasmuch as it was not available for filling and hence its usefulness was confined solely to discharge openings unless indeed it was cut away for filling which of course would irreparably destroy its scaling function.

The problem of the instant case is to retain the standard or conventional. screw plug and yet provide for absolute and non-tamper sealing under changing conditions of temperature and pressure; and to provide an effective double seal that is applicable to one and all of the openings of the drum.

The nature, characteristic features and scope of the invention will more readily be understood from the following detailed description taken in connection with the accompanying drawing, forming a part hereof, wherein:

Figure 1 is a vertical sectional view of a double seal or closure embodying features of the invention.

Fig. 2 is a similar view of the filling throat or inner seal carrying element before application.

Fig. 3 is a sectional detail showingthe relation of the parts in the application of the inner seal.

Fig. 4 is a plan view of a typical inner sealing disk.

Fig. 5 is a sectional view of the disk.

Fig. 6 is a sectional detail of a modification of the inner seal.

In the drawing, 5 represents either the head sheet or wall of a shipping drum or container having a plugged opening generally represented at 6. The element 1 is or may be of the type of the conventional plug having screw threaded engagement in a complemental ring 8, which, as usual, is secured by embossment against turning in the wall or head sheet 5. As indicated, the parts referred to are, or may be, as usual, and the plug constitutes the external closure of my improved double seal, there being a gasket 9 between its flange and the embossed flange of the container wall or head sheet.

In accordance with my inventive thought, I provide an inner seal-carrying filling throat or funnel consisting of a stepped tubular member It formed to interlock with the plug seating ring 8 through the medium of an initially upstanding flange H, which in the die operation for seating the ring 8 is caused to be depressed upon a packing ring or gasket 12 positioned upon the flange of the ring, thus providing for fluid-tightness regardless of temperature conditions. After the filling operation, the bottom opening l3 of the filling throat or funnel is effectively sealed, for example, as in Fig. 1, in which a cupped member I4 is forced into sealing relation with the shouldered portions l5 of the throat and an intervening packing ring or gasket l6, and in such way that its head H is expanded beyond the diametric limits of the wall of the opening so that the closure l4 cannot be removed without showing evidence of tampering. The body of the disk may have a depressed annular rib or groove I 8 in orderto stiffen it against deflection. Fig. 6 shows a modification in which the bottom of the filling throat is formed with an inner flange l9 and just above it with an inwardly directed bead 20, the former operating to seat a disc closure 2|, which is sprung past the bead 20 and held by the latter against a gasket 22.

The sealing cup or filling throat so-called, when closed, constitutes a trapping area for water that may be sucked in past the plug under breathing action of the receptacle, and the presence ofwater in the trapping area further reduces the hazard of breathing losses.

Having described my invention, I claim:

1. Means for stopping receptacle openings, comprising the combination with a standard assembly including a plug and its complemental bushing, of a filling throat having an upstanding flange adapted to be forced into packing retaining relation with the flange of the bushing in the act of securing the latter with relation to the receptacle, packing intermediate said flanges, and a closure for the bottom of said throat.

2. A receptacle for volatile liquid formed with a wall having an opening, a filling throat interlocking with the receptacle marginally of the opening and extending; within the receptacle, means comprising a plug and its complemental bushing for sealing the outer end of the throat, and a seal for the inner end of the throat, said seals being substantially spaced apart whereby the filling throat may function as a reservoir for fluids which may pass either seal in response 5 to breathing action.

EDGAR E. SHANOR.

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