A Cover for Bottles, Jars, Glasses, Dishes, and the like.
Year: 1893

page_text: Date of Application, 27th Jan., 1893
Complete Specification Left, 27th Oct., 1893-Accepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
A Cover for Bottles, Jars, Glasses, Dishes, and the like.
I, JOSEPH DAY of Spring Gardens, Bath, in the County of Somerset, Engineer
do hereby declare the nature of this invention to be as follows:-
According to my invention I make a cover for the tops of bottles, jars, glasses,
dishes and the like, so as to prevent access of air and dust and thus to keep the
contents in a better or fresher condition. The cover is made preferably of a flat or
moulded sheet or dise of india rubber or other material or fabric of an air or water
tight naturo. The rubber is proferably stiffened at the edges so as to give it a
certain amount of rigidity there. The outer edge may for instance be stiffened by
having a metal or other rim cemented thereon, or a rim of hard rubber in one with
the sheet aforesaid or a ring of metal or the like may be moulded in the rubbor, or
a metal ring may be spun round the edge, or a ring of Bay section put round
allowing the rubber to rest thereiu whereupon the upright part of the ring is
forced down RO As to clamp the rubber, or the edge may be strengthened or
stiffened in any other convenient manner.
In using the cover it is placed on the top of the glass or other utensil and the
centre of the disc is slightly pressed down so as to exclude a certain quantity of air.
On releasing the pressure the inherent elasticity of the rubber causos it to tend to
regain its normal position and a vacuum is produced in the glass. Thus the weight
of the atmospheric air pressing on the cover causes it to fit securely on to the top
of the glass and excludo the outside air.
71 1
Tom1002
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.

page_text: Or
The rubber a is preferably stiffened at the edges so as to give it a certain amount
of rigidity there. The outer edge may for instance as shown in Figures 1 to 6
inclusive be stiffened by having a metal or other rim cemented thereon.
instead thereof as shown in Figure 7 a ring b of metal or the like may be moulded
in the rubber. Or a ring 6 of L section as shown in Figure 8 is put round the
edge of the rubber allowing the same to rest therein whereupon the vertical part of
the ring is forced down and on to the rubber so as to secure it. Or referring to
Figures 10 and 11 the ring may consist of two parts b¹ and ¿ which are forced
together and clamp the disc a between them. It is however evident that the edge
of the diso may be strengthened or stiffened in any other convenient manner.
I have described and shown the cover as being made round but it may be made of
any shape to conform with the vessel to which it is to be applied. Where possible
the cover is stretched on the ring or frame b so that additional elasticity is given
thereto.
In using the cover it is placed as shown in Figure 11 on the top of the glass o or
other vessel and the centre of the disc or diaphragm is slightly pressed down so as
to excludo a certain quantity of air. On releasing the pressure the inherent
elasticity of the rubber causes it to tend to regain its normal position and a slight
vacuum is produced in the glass. Thus the weight of the atmospheric air pressing
on the cover causes it to fit securely on to the top of the glass and to exclude the
outside air. By moistening the face of the cover greater adhesion is secured.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declaro that what I .
claim is :-
1. A cover for bottles, jars, glasses, dishes and the like consisting of an elastic
diaphragm with stiffened edges substantially as described.
2. The constructions of covers as shown on the drawings.
Dated shi 7 day of October 1908.
wwwwCT 6333
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.