US601698A

US601698A - Alexander backhaus

Info

Publication number: US601698A
Authority: US
Publication date: 1898-04-05
Anticipated expiration: 1915-04-05

Description

(No Model.)

A. BACKHAUS.

BOTTLE STOPPBR.

No. (so-1,698. PatentedA rf, 1898.

fraz/%277 I UNITED STATES I urreni PATENT BoTTLE sToPPER.

SPECIFICATION forming part of Letters Patent No. 601,698, dated Aprl 5, 1898.`

Application filed December 30, 1897. Serial No. 664,(554. (No model.)

To alluhom it may concern:

Be itknown that LALEXANDERBACKHAUS, doctor of philosophy and professor of agriculture, a subject of the Grand Duke of Hesse, residing at Knigsberg, in the Province and Kingdom of Prussia, German Empire, have invented a new and useful Bottle-Stopper, of which the following is a specification.

The present invention relates to the airtight closu re of bottles and other receptacles for containing sterilized materials, particularly to bottles for sterilized milk, by means of an elastic cap slipped over the opening or mouth of the receptacle or bottle previous to the sterilizing operation and retained in position by means of its inwardly-thickened edge catching under a shoulder arranged 'around said opening, such as the usual bead of the bottle-neck. With stoppers of this description the opening for allowing the Vapors to escape during the sterilizing operation is provided for in the cap either in that portion of it which closes upon the bead or in the center and then is combined with a Valvelike self closing device. Obviously such opening hasthe effect of weakening the cap and making it accessible to d'amages. On the other hand, the combination with the said self-closing device complicates the manufacture and renders it costly.

My aim is to do away with the defects referred to by means of the present invention, which to this end consists in providing the lower part of said shoulder or swelling with a recess or depression which extends down to the lower edge of that portion and arranging below said edge and adjoining the same a rib-like projection or ledge at either side of the end of said depression, so as to produce a small groove or channel. When the capis slipped over the bead, it closes upon the latter in an air-tight manner; but as it rests with the respective portion of its inwardlythickened edge upon the said ledges it allows the channelformed by the latter, and consequently the depression in the bead, to remain in open communication with the atmosphere. If now the bottle or other receptacle is heated for sterilizing its contents, the vapors evolved, in expanding the cap, lift the latter from the upper portion of the bead or shoulder until the depression is arrived at, when they escape through the said channel into the at-- mosphere. Upon cooling the bottle or other receptacle the cap contracts again and hermetically closes upon the bead or shoulder, so that the communication between the interior of the receptacle and the channel is perfectly broken.

On the annexed sheet of drawings I have illustrated my invention as applied to a gla ss bottle for sterilized milk.

Figure l is an elevation of the bottle having the cap 'slipped over its bead, the lower tends of the channel-forming ledges being Visible. Fig. 2 is an elevation of the mouth portion of the bottle-neck, with the cap removed, so as to show the depression in the bead and the ledges. Fig. 3 is a central Vertical section through the cap removed from the bottle. Figs. 4 and 5 are Vertical central sections according to line 4 5, Fig. 1, Fig. 4 showing the cap in its normal stopping position and Fig. 5 showing the cap lifted off from the bead, as during the sterilizing process.

a is the bead of the bottle-neck. In the 'lower portion of same-is asmall depression a', originating at some distance from its lower edge and extending down to the latter. At each side of thisdepression the neck is provided with a small downwardly-directed ledge a parting from the bead, so that a channel & is produced, forming a downward prolongation of depression a'.

b is the stopping-cap, having the inwardlythickened edge b'.

When the capb is slipped over the bead a, its edge b' catches under the bead all around,

with the eXception of that portion which comes against the ledges & and consequently takes its seat upon the latter, leaving the channel a and depression a' in free communication with the atmosphere, as illustrated by Fig. 4. Now when the filled bottle having the cap slipped over, as shown, is heated vapors are generated, and these cause the cap to eXpand, the latter being retained upon the bottle by the coperation of itsthickened edge b' with the under side of the bead, acting as an abutnent. This expansion goes on until the portion of the cap which is lifted off extends beyond the origin of depression a',when the vapors escape through the same and the channel a? into the atmosphere, as illustrated by IOO 2 v v 6o1,698

stopping-cap provided with an inwardly-` thickened edge to catch under said shoulder,

of adepression formed in said shoulder and extended projections so arranged on the portion of the receptacle adjacent to itsshoulder that a channel is forrned for establishing communication between said depression and the atmosphere, substantially as and for the purpose stated.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ALEXANDER BACKHAUS.

witnesses OARL KNoPP WERNER BLDEL.