US1619283A - Bottle cap - Google Patents

Description

March 1 1927.

E. G. BAUM BOTTLE CAP Filed March 21. 1924 Patented Mar. 1, 1927.

UNITED sjrirriazs PATENT OFFICE.

.EWALD G. BIAUM, 0F NATICK, MASSACHUSETTS, ASSIGNOR TO SEAL-KAP COMPANY, 0F

p 4 NATICK, MASSACHUSETTS, A CORPORATION 0F MASSACHUSETTS.

BOTTLE CAP.

Application filed March 21, 1924. Serial No. 700,836.

This invention relates to bottle caps more especially those designed to closeoit' the mouths of milk bottles and has for its chief object to provide a construction whereby the cap may be closed into tight sealing engagement with the bottle regardless of very considerable variations in the contour of those portions of the bottle with which the cap 1s intended to cooperate.

While not restricted thereto, it is particularly applicable to two-part caps of the general type illustrated in my application for patent, Serial No. 616,874, filed February 5, 1923, .for milk bottle caps, embodying one part having a pouring lip housing and a bore covering portion joined thereto by' an annular bottle engaging portion, and another part comprising a disk overlying the. bore covering portion of the first partwith its periphery in engagement with the inner wa'll of the pouring lip housing.

Referring tothe accompanying drawings,

Figure l is a plan o the cap.-

Figure 2 is an inverted plan of the same.

Figure 3 is a section on line 3 3 of Figure 2.

Figure 4 is a ramgentary section through the upper portion of a bottle having a cap applied thereto. I

Figures 5, 6 and 7 are views similar to Figure 4, but showing the cap applied to bottles having their portions with which the cap seals of different contours.

The cap comprises two parts, one having an annular pouring lip housing portion l which is shown as corrugated over the upper edge of the. bottle mouth. Immediately within this pouring lip housing is a down- Wardly inclined or frusto conical portion 2 which is arranged to be seated on and to conform to the edge of the annular ledge 3 with which such bottles are. provided below their open ends andon which the commonly used cardboard closure disks are intended to be seated. Inwardly of the portion 2 is a bore coveringportion comprising a substantially flat central disk surrounded by a -downwardly and outwardly inclined annular portion 6. In order to stilenthis cap so that it holds rmly in position a disk 8 is forced downwardly within the pouring lip housing portion, its periphery resting against and forcing outwardly the inner wall of this ortion so that when the c ap is applied to. the bottle it firmly engages the bottle pouring li when it flares downwardly and outwarl ly vabove the ledge 3.

The disk portion v8, together with the portions 2 and 6 ofthe other cap part, form an annular portion of substantially triangular cross section immediately within and below the pouring lip housing. When the cap is applied this portion 2 is conformed to the mating bottle portion and serves as a sealing gasket. portion by the milk tends to soften and swell the paper-board of which the cap is preferably made', so that this sealing gasket action is augmented.

The portion 2 is of considerable width so that it may engage and be conformed to the ledge 3 of the bottle regardless of very considerable variations in the contour of this ledge or departures from a truly circular outline. For example, as shown in Figure 4, the ledge 3 is considerably rounded merging somewhat gradually Witli the innerwall of the bottle 4 immediately therebelow, while in Figure 5 the edge between the ledge 3 and the-inner wall 4 of the bottle is sharply deined and inclines upwardly. ln Figure 6 the ledge is formed substantially dat on its upper face and with its inner edge comparatively sharp, while in Figure 7 it is sloped downwardly at a very considerable angle. Regardless of these variations in contour,- howevei, the annular portion 2 may be made to conform thereto as the cap is forced into proper seating engagement-with the bottle mouth. Not only does this construction take account of variations in the cross sectional contour of the ledge, but also provides for departures from true circular form. For example, in Figure 2 is shown in dotted lines at l0 the line of engagement with the portion 2 of the cap of the inner edgeof the ledge when this inner edge is elliptical rather than circular, it being noted that it engages near the outer edge of the portion 2 at oppositely disposed points a and b and near the inner edge at points c and d' midway between. Of course any other variations or irregularities, so long as the edge of the ledge strikes between the inner and outer margins of the portion 2 are efectually taken care of so that the bottle will be fully sealed when the cap is applied thereto.

The triangular cross section, hereinbefore mentioned, of which the portion 2 forms one side furnishes a substantial stiffness lto the The moistening of this the cap.

Having thus described an embodiment of this invention it should be evident that va- .rious modifications and changes might be made therein `without deartmg from its spirit or scope as defined y the appended c aims.

I claim:

l. A bottle cap having a bore covering portion terminatlng in an upwardly inclined annular portion to engage and be closely conformed to the usual internal annular led adjacent to the mouth of a milk bottle an extended downwardly beyond the face of the ledge to form a sealing contact beneath it and serve as a sealing gasket therefor.

2. A bottle cap having a bore covering portion terminating in an upwardly inclined annular portion to engage and be closely conformed to the usual internal annular led e adjacent to the mouth of a milk bottle an extended downwardly beyond the face of the ledge to form a sealing contact beneath it, said annular' portion being of sufficient width to be conformable to bottles of different internal contours and irregularities and serve as a sealing gasket therefor.

3. A bottle cap oompmsmg a bbre covering portion havingl a marginal portion of triangular section aving one face upwardly and outwardly inclined and deformable to conform to the inner wall of a milk bottle at and'below the usual internal disk supporting ledge.

4. A bottle cap comprising a bore covering portion havin a marginal portion of triangular section aving one face upwardly and outwardly inclined and deformable to conform to the inner wall of a milk bottle at and below the usual internal disk supporting ledge, said face being of substantial width to conform to ledge portions of different contours and irregularities.

5. A bottle cap having a bore covering portion, a pouring lip housing, and an annular frusta conical portion between said bore covering portion and lig housing en gageable with and conforma. l ner face of a bottle at and below an internal e to the inannular ledge adjacent to its mouth. v

In testimony whereof EWALD G.' BAUM.

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