Improvements in Air-tight Closing Devices for Jars and other Vessels.
Year: 1891

page_text: Date of Application, 15th May, 1891-Accepted, 25th July, 1891
COMPLETE SPECIFICATION.
Improvements in Air-tight Closing Devices for Jars and other
Vessels.
A communication from ACHILLE WEISSENTILANNER, of Nancy, in the Republic
of France, Manufacturer of Preserves.
1, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
This invention consists in a closing device ensuring perfect tightness for an
indefinite period of time and is mainly intended to apply to jars and other vessels,
used for preserving fruit or produce such as is liable to become tainted or spoiled
through contact with air.
The device mainly consists of two parts
(1.) A ring or washer of card-board, indiarubber or other compressible material
which may or may not be slotted.
(2.) A metal ring so shaped in section that it fits the neck or edge of the vessel
and which is adapted to retain the cover or cap in position.
The invention will be best understood by reference to the accompanying
drawings in which the invention is shown as applied to a jar.
.
Fig. 1 is a section of a jar.
Fig. 2 is a perspective view of the metal ring A.
Fig. 3 is a perspective view of the compressible ring or washer B.
Fig. 4 shows a jar formed with a shoulder at the neck or edge for the reception
of the metal ring A.
Fig. 5 is a section of the upper part of the same jar covered with the cap C
fastened on by means of the ring A.
Fig. 6 is a section of the plate of pewter to which may be fitted the compressible
ring or washer (being a modification of the device).
Fig. 7 is a section of the cap or cover constructed with a view to applying the
improved fastening device.
Supposing a jar is to be closed as illustrated in Fig. 1 the ring or washer B of
indiarubber, asbestos, cardboard, or the like being placed within the recess provided
for the purpose, the cover is applied with sufficient force to compress the said
washer B and when the edges meet the metal ring A is applied externally in the
position indicated in Fig. 1 and fastened by means of the tongue and slot shown in
Fig. 2. The object of this ring is to retain the cover in the position into which it
has been forced.
In the device illustrated in Figs. 4, 5, 6 and 7 the compressible material B is in
the form of a disc, but it may be in the form of a ring, washer or equivalent, and is
fitted into a metal cap C shown detached in Fig. 6 and in a thick line as applied in
Fig. 5.
When the closing device is applied to the mouth of a jar or the like the
disc B C is pressed on to the mouth with the metal side C uppermost. A cap D
Figs. 5 and 7 is then placed over B C and this cap is secured to the jar by one of
the metal rings A as before described.
Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondent, and in what manner the
same is to be performed, I declare that what I claim is :-
1. An air-tight closing or fastening device for jars or other vessels mainly
consisting of a washer such as B of indiarubber cardboard asbestos or other
compressible material slotted or otherwise and of a ring such as A of metal or

page_text: other suitable material capable of retaining the cover in the position into which
it has been forced against the resistance of the compressible washer substantially
as described and illustrated in the accompanying drawings.
2. In a closing device for jars and like vessels a ring such as A substantially as
described and illustrated in the accompanying drawings.
3. The combination and arrangement of parts constituting the complete closing
device substantially as described and illustrated in Figures 5 6 and 7 of the
accompanying drawings.
Dated this 15th day of May 1891.
W. P. THOMPSON & BOULT,
Agents for the Applicant.