US1615157A - Milk-bottle cap - Google Patents

Description

Jan. 18, BAUM MILK BOTTLE CAP Filed Feb. 5 1923 Puma Jan. 18,1927.

UNITED STATES PATENT OFFICE.

EWALD G. BAUM, OF NATICK, MASSACHUSETTS, ASSIGNOR TO SEAL-m COMPANY, OF NATIOK, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

MILK-BOTTLE CAP.

Application filed February 5, 1928. Serial No. 618,874.

This invention relates to caps more particularly designed for closing milk bottles and has for one of its objects the provision of a cap which ma be sealed against the usual shoulder of t e bottle on which the cardboard disk is commonly seated, againstthe wall of the bottle neck immediately above this shoulder and also extend over the edge of and below the shoulder without the loss of milk in case the bottle is initially filled level with the shoulder.

A further feature of the invention relates to means for maintaining the cap sealed in a secure manner, the cap and sealing member formin in effect a truss structure which offers consi erable resistance to the deformation necessary to effect removal of the cap from the bottle.

For a more complete understandin of this invention together with further ob ects and advantageous details and combinations of parts, reference may be had to the accompanying drawings in which Figure 1 is a top plan of a cap as applied to a bottle.

Figure 2 is a fragmentary section on line 2-2 of Figure 1.

Fi re 3 is an inverted plan of the cap. detac ed.

Figures 4, 5, and 6 are views similar to Figures 1, 2, and 3, respectively, except that the bottle islnot shown, Figure 5 being a section on line 5-5 of Figure 4.

Figures 7, 8, and 9 are views similar to Figures 4,5, and 6, respectively, showing the sealing means applied to a difl'erent form of cap, Figpre 8 being a section on line 8--8 of Figure Figure 10 is a transverse section through a further modified form of cap. vReferring to the form shown in Figures 1, 2, and 3, the cap C comprises an annular pouring lip housing portion 1 which is shown as corrugated over the upper edge of the bottle mouth. Immediately within this pouring lip housing is an annular shoulder portion 2 which is arranged to be seated on the annular ledge 3 of the bottle on which the disk of cardboard commonly used for closin the bottles may be seated. Beneath the le ge 3 the bore of the bottle is flared outwardl for a short distance as shown at 4. At 8 1s shown a bore-covering portion of the cap which is connected to the shoulder portion 2 by means of an annular corrugawould displace some of the contents. For

this reason the bore-closing portion within the corrugation is raised slightly above the level of the shoulder 2 so as to afford a space into which the contents so displaced may flow so that in forcing the cap on the bottle none of'the contents is forced out from beneath the cap and lost. As the corrugation 9 bears over the inner edge of the bottle ledge 3 it permits a more ellicient seal to be effected therewith than if contact were only against the upper face of -this ledge.

Further in order to hold the cap securely in position a disk 10 may be forced downwardly within the pouring lip housing its perimeter resting against and forcing outwardly the inner wall of the pouring lip housing, the bottle pouring lip at this point flaring downwardly and outwardly. This disk is preferably forced to a position within the pouring lip housing and then its edge and the inner face of the housing spread outwardly. against the inner face of the pouring lip by a suitable die. When the disk is finally in its position, its central porton bears against the upper face of the cap withinthe corrugation 9 and its edge may be, though not necessarily, slightly upwardly bent to engfge firmly within the lip housing.

This dis bearing on the upstanding por- 'tion of the pouring lip housing maintains it in sealing contact with the wall of the bottle mouth.

In Figures 4, 5, and 6 a preferred construction of cap is shown in which the pouring lip housing 1 is constructed as before as well as the shoulder 2 which engages on the bottle ledge. Instead of the corrugation 9, however, the bore-covering portion is bent downwardly over the bottle shoulder as at 12-and then is formed in substantially cone shape, the central portion thereof being flat as at 13 and raised upwardly above the level of the lower face of the shoulder 2 sufficiently to permit liquid displaced by the portion 12 when the cap is placed in position to flow therebeneath so as not to'be forced out of the bottle. With this form also a disk 10 may be forced within the housing 1, its central portion resting on the fiat top 13 of the bore-covering portion and its edge engaging the inner wall of the pour-' ing lip housing. With this construction, since the portion 13 is raised upwardly above the portion 2, the disk 10 when in position is domed or upwardly convexed or dished at its center but to a less extent than the and 12. This causes a truss e ect to be produced .between the sealing disk and the cap, as may be seen clearly in Figure 5,

which is very resistant to deformation so that the cap is very securely held in position. In this case also the marginal portion of the disk 10 may be slightly upwardly turned by its engagement wvith the pouring lip housing.

In Figures 7, 8 and 9 the sealing disk 10 is shown as applied to a cap of the form shown in my reissued patent- N 0. 15,491 dated November 21, 1922. In this case, however, the bore-covering portion is mamtained in its upwardly dished form after it has been sealed on the bottle instead of somewhat downwardly dished as shown in that patent. These figures are merely used to show the application of the sealing disk 10 to this type of cap by which a tighter sealing engagement of the cap to the bottle may be effected. In this form as well as in the forms shown in Figures 1 to 6 the disk presents a substantially flat upper surface on which printing or advertising matter may be ap lied. In igure 10 is shown still another modification, in which the annular corrugations 9 shown in Figures 1, 2, and 3 are utilized together with the conical bore-covering portion illustrated in Figure 5. In this case, however, the bore-covering portion shown at .15 is less prqnouncedlyconical than in' the "form shown in Figure 5 since a certain part of the axial dimensions of the cone are taken up by the corrugation. .This type of cap also may be sealed by forcing a flat disk 10 into position against the center of the upper face of the bore-covering portion and engaging and forcing outwardly the inner wall of the pouring lip housing, a truss construe-- ments of this' inventionit should be evident to those skilled in the art that various modifications and changes may be made therein without departing from its s irit or scope as defined by the appended c aims.

I claim:

1. A bottle cap for a bottle having an internal annular ledge below its to which comprises a bore-covering portion iia part adjacent its margin arranged to'overlic the inner edge of the ledge and project therebelow within said ledge and havin its central part projecting above said le ge.

2. A bottle cap for a bottle having an im ternal annular ledge below its top, which comprises a bore-covering portion aving -a part adjacent to its margin arranged to overlie the inner edge of the ledge and project therebelow within said ledge, and having its central part projecting above said ledge and ving a provided at said margin with an upwardly extending pouring lip housing engaging over the upper edge of the bottle mouth,

3. A bottle cap having an upwardly convex bore-covering portion, an annular upstanding marginal portion terminating in a pouring lip housing, and a disk engaging at its periphery within said upstanding portion to maintain said upstanding portion in sealing contact with the wall of the bottle month, said disk being incontact with the upper face of said bore-covering portion only at its center.

4. A bottle cap having an upwardly conveited bore-covering portion, annular mar-' ginal portions upstanding from said bore-- covering portion, and a disk having its central portion engaging the upper face of the central portion of said bore-covering portion and its periphery engaging with said upstanding marginal portion, whereby said upstanding portion is maintained in sealing contact with the wall of the bottle mouth,

said disk and bore-covering portions being spaced apart intermediate said central por- I tion and the periphery of said disk.

In testimony whereof I have afiixed my signature.

EWALD G. BAUM.

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