Improvements in and connected with. Stoppering or Hermetically Closing Jars or other Receptacles to Facilitate Opening.
Year: 1897

page_text: Date of Application, 1st Mar., 1897
Complete Specification Left, 3rd May, 1897-Accepted, 5th June, 1897
Improvements in and connected with. Stoppering or Hermetically
Closing Jars or other Receptacles to Facilitate Opening.
We, FREDERICK JOYNSON, Chemical Engineer, of Heatherlea, Penketh,
Warrington, and WILLIAM HARRISON Mechanical Engineer, of 196, Padgate
Lane, Warrington, both in the County of Lancashire, England, do hereby declare
the nature of this invention to be as follows:-
The object of our invention is to construct the mouths and covers and to effect
the stoppering of jars or receptacles intended to contain goods in vacuum in such
manner as to maintain an airtight joint and to facilitate destruction of the vacuum
when required to remove the cover without injuring any part.
According to our improvements just below the mouth of the jar we form a
regular and even flat or concave seat or bed adapted to receive a well-fitting rubber
or yielding washer preferably circular in cross-section. The rim of the cover is
extended downwards to completely cover the washer, and on its inner face is
formed a scat of form (and diameter if the jar be circular) corresponding to that
above referred to, so that when the washer is placed in position and the jar closed
by vacuum or otherwise the washer will be compressed between the two seats and a
perfectly air tight joint assured, the washer being entirely enclosed and inaccessible.
For the purpose of destroying vacuum when required we form a hole through the
rim of the cover exactly opposite to the washer when compressed so that the hole
is then completely covered up airtight; by means of any suitable instrument passed
through this hole the washer can be pressed down or locally displaced sufficiently
to admit air and destroy the vacuum.
The receptacles and covers may be of any suitable material but in glass or cast
covers it is advisable to mould a recess in the rim where the hole is made in order
to equalise the thickness of glass or material and so avoid unequal contraction in
cooling. When opening the jar it is desirable to use a blunt instrument which will
not cut or puncture the washer and thus nothing is injured and all the parts may be
used again.
J. C. CHAPMAN,
Agent.
Improvements in and connected with Stoppering or Hermetically
Closing Jars or other Receptacles to Facilitate Opening.
We, FREDERICK JOYNSON, Chemical Engineer, of Heatherlea, Penketh,
Warrington, and WILLIAM HARRISON, Mechanical Engineer, of 196, Padgate
Lane, Warrington, both in the County of Lancashire, 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 :-
The object of our invention is to construct the mouths and covers and joints of

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jars or receptacles intended to contain goods in vacuum in such manner as to make
and maintain an airtight joint and to facilitate admission of air for destruction of
the vacuum when required to remove the cover, and without destroying or injuring
any part.
In describing our invention we will refer to the accompanying drawings in
which
Fig. 1 is a sectional elevation showing the upper part of a jar with the cover
raised. Fig. 2 is the same with the cover in position and hermetically secured.
Figs. 3 and 4 are respectively an enlarged part elevation and section showing
the means we employ for destroying the vacuum in the jar.
According to our improvements, just below the mouth of the jar A we form a
ledge A¹
upon which is a regular and even flat or concave seat or bed a adapted to
receive a well-fitting rubber or yielding washer W preferably circular in its cross-
section. The rim of the cover B is extended downwards to completely cover the
said washer, and on its inner face is formed an inwardly projecting ledge B¹ upon
which is a seat of form (and diameter if the jar be circular) corresponding to the
seat a upon the jar neck above referred to, or such that when the washer W has
been placed in position and the jar closed by vacuum or otherwise the washer W
will be compressed between the two seats a and b and thereby effectually expanded
so that a perfectly air tight joint is assured, the washer W being then entirely
enclosed and inaccessible as shown to the right of Fig. 2 and except as hereinafter
described. For the purpose of admitting air and destroying vacuum when required
to remove the cover we form or mould an opening or hole H through the
downwardly projecting rim of the cover B in such a position as to register with or
come exactly opposite to the washer W when same is compressed, so that the
hole H is then completely stopped up and rendered airtight by said washer; by
means of any suitable instrument such as C in Fig. 4, passed through this hole H
the washer W can be pressed down or locally displaced sufficiently to admit air
in the direction of the arrow Fig. 4 and so destroy the vacuum.
The receptacles and covers may be of any suitable material, but in glass or cast
covers we may mould a recess in the rim of the cover B as shown dotted at h
Figs. 3 and 4 where the hole H is made, but this is in no way essential. When
opening the jar it is desirable to use a blunt instrument which will not cut or
puncture the washer and thus nothing is injured and all the parts may be used
again.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
The herein described improved method of constructing jars and their covers for
making and maintaining a hermetic and airtight joint and for destroying vacuum
when required, which consists in forming corresponding seatings such as a and b
respectively upon the jar neck and within the cover rim, between which seatings a
well-fitting yielding washer is compressed when the closure is made, the cover-rim
then completely protecting the washer; and forming a hole through the said rim
registering exactly with the said washer when compressed, so as to be then stopped
up thereby, but in such manner that by the insertion of a suitable instrument
through the said hole the washer can be pressed down or locally displaced
sufficiently to admit air and destroy the vacuum within the jar.
Dated this 3rd day of May 1897.
For the Applicants,
J. C. CHAPMAN,
70 Chancery Lane, London, W.C., Chartered Patent Agent.