An Improvement in Milk and Cream Jars.
Year: 1893

page_text: Date of Application, 16th Oct., 1893
Complete Specification Left, 14th July, 1894-Accepted, 18th Aug., 1894
PROVISIONAL SPECIFICATION.
An Improvement in Milk and Cream Jars.
I, ISAAC ALFRED HATTERSLEY, of No. 30 Maida Hill West, in the County
of Middlesex, Gentleman, do hereby declare the nature of this invention to be as
follows:-
My invention relates to jars for containing milk or cream which I construct and
close in the following manner. I make the jar of glass or ceramic material with a
flat or slightly grooved flange at its mouth. I make the cover either of sheet metal
or of glass or ceramic material forming in it an annular groove a little wider than
the flange of the jar, and in this groove I fix a packing washer which may be of
cork, caoutchoue or other elastic material. After charging the jar with milk or
cream I place the lid on it holding it down by a weight or by a spring engaging
under the flange of the jar; I then heat the jar until a little vapour escapes from
under the cover.
On cooling, a partial vacuum being formed within the jar, the
cover is held firmly down by atmospheric pressure and the weight or spring is then
removed. When the cover is made of sheet metal it can be easily removed after
first puncturing it to admit air, and when it is of glass or ceramic material it is
made with a small hole through it which is at first plugged, the plug being
withdrawn to admit air when the cover has to be removed.
The packing washer instead of being held in a groove of the cover, may be fixed
on the flange of the jar or held in a groove in the flange, but I prefer to fix the
washer to the cover so as to be removed with the cover when the jar is opened to
pour out its contents.
Dated this 16th day of October 1893.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improvement in Milk and Cream Jars.
1, ISAAC ALFRED HATTERSLEY of No. 30 Maida Hill West, in the County
of Middlesex, Gentleman, 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 :-
My invention relates to jars for containing milk or cream which I construct and
close in the following manner. I make the jar (a section of the upper part of
which is shewn in the accompanying drawing) of glass or ceramic material with a
flat or slightly grooved flange F at its mouth. I make the cover C either of sheet
metal as shewn by the full lines or of glass or ceramic material indicated by the
dotted lines, forming in it an annular groove G a little wider than the flange F of
the jar, and in this groove I fix a packing washer W which may be of cork,
caoutchouc or other elastic material. After charging the jar with milk or cream,
I place the lid C on it, holding it down by a weight, or, it might be by a spring
engaging under the flange of the jar; I then heat the jar until a little vapour
escapes from under the cover. On cooling, a partial vacuum being formed within
the jar, the cover is held firmly down by atmospheric pressure and the weight or
spring is then removed. When the cover is made of sheet metal it can be easily
removed, after first puncturing it to admit air, and when it is of glass or ceramic
Di 1

page_text: material it is made with a small hole H through it which is at first plugged, the
plug being withdrawn or bored to admit air when the cover has to be removed.
The packing washer instead of being held in a groove of the cover, may be fixed
on the flange of the jar or held in a groove in the flange, but I prefer to fix the
washer to the cover so as to be removed with the cover when the jar is opened to
pour out its contents.
The face of the jar or bottle top and the glass or ceramic cover may be ground
to an air tight fit, in which case packing may be dispensed with.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
A milk or cream jar provided with a cover held by atmospheric pressure,
substantially as described.
Dated this 12th dow of IJ 100
ABEL & IMRAY,
Agents for the Applicant.