-T Can Tops
Year: 1888

page_text: I, JAMES MILNE of Aberdeen in the County of Aberdeen North Britain, Grain
and Produce Merchant, 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 :-
15
This Invention which relates to Air-Tight Can Tops or Covers, consists in soldering
or otherwise securing to the mouth of the tin or other metal "Can a stepped rim
struck out of a solid sheet of tin plate or other metal. The step or shoulder is formed by
making the lower portion of the rim, or that part of it which is soldered to the body
of the Can, wider or greater in diameter than the upper portion which is arranged to
project above the top of the Can so that when the said rim is in position the step or
shoulder rests on the vertical sides of the Can. The Top of the upper portion of the
rim is provided with a small internal flange.
The lid or Cover, which is stamped or otherwise made from a solid plate of tin or
other sheet metal is provided on the top with an internal recess, for the reception of
the internal Flange on the rim of the "Can." This recess is formed between a raised
portion of the top of the lid or Cover, and the vertical sides of same, which are pro-
vided at their lower extremities with a small external Flange. To close the "Can
the lid or Cover is slipped over the upper portion of the rim and pressed down until
it comes into contact with the top of the same, the internal Flange on the rim thereby
fitting into the recess in the Cover. The depth of the sides of the lid or Cover is so
arranged, that when the "Can" is closed a narrow space is left between the external
flange of the lid and step or shoulder on the rim of the "Can." By inserting a thin
edged tool or instrument in this narrow groove or space the Cover can be easily lifted
off or removed.
The Cans and Covers are by preference made circular, but they may be made oval
or any other form, and to any desired size.
In order that my said Invention may be most fully understood and readily carried
into effect, I will proceed to describe the drawings hereunto annexed
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Fig. 1 is a vertical section of a Can with an Air-Tight Top or Cover constructed
according to and constituting my present Invention.

page_text: Fig. 2. is a plan of the Cover.
Fig. 3. is a section of the cover, and Fig. 4. is a section of the rim.
According to the arrangement illustrated in the said figures, I solder or otherwise
secure a stepped rim to the mouth of the Can A as shewn at Fig. 1. The step or
shoulder B is formed by making the lower portion C of the rim wider or greater
in diameter than the upper portion D. The top of the upper portion D of the rim is
provided with a small internal Flange E as shewn at Fig. 4.
The lid or Cover is provided with an internal recess F for. the reception of the
internal Flange E on the rim of the Can A, and its vertical sides G are furnished at
their lower extremities with a small external Flange H. To close the Can A the lid or
cover is slipped over the upper portion D of the rim and pressed down until it comes
into contact with the top of the internal Flange E when it is found that a narrow
space J is left between the external Flange H and the step or shoulder B. By inserting
a thin edged tool or instrument into this narrow groove or space J the Cover can be
easily lifted off or removed.
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
claini is.
First. The general arrangement and combination of parts, constituting the improved
Air-Tight Can-Tops or Covers, substantially as herein before set forth with reference
to the annexed drawings.
Second. The Can Top or Cover having an external Flange H and recess F
substantially as and for the purposes hereinbefore set forth with reference to the
annexed drawings.
Third. In Air-Tight Can Tops or Covers the rim with its step or shoulder B and
flange E substantially as described and for the purposes set forth with reference to the
annexed drawings.
D
1
T
1000