Improvements in Hermetically Sealed Boxes, Tins, and the like.
Year: 1898

page_text: Date of Application, 13th Aug., 1898-Accepted, 29th Oct., 1898
[Communicated from abroad by AKTIESELSKABET SANDVIKENS BLIKVAREFABRIK,
of Sandviken, in the Kingdom of Norway.]
Improvements in Hermetically Sealed Boxes, Tins, and the like.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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 relates to hermetically sealed boxes, which are opened by
tearing out a sectional strip therefrom.
The invention is represented in the accompanying drawing in which
Figure 1 is a cross-section through the sealed box,
Figure 2 is a similar view, of the opened box, showing also the upper folded
edge of the cover.
The inside of the vertical wall of the cover is weakened by two notches bb,
which run all round the said vertical wall as shown by the dotted lines bb, but
do not go quite through the sheet-metal.
Between the notch-lines bb is made a slot c, which goes quite through the
sheet-metal. Through this slot is inserted a strip d of suitable length, which
is soldered to the said vertical wall on the inside.
The key for opening may be of any suitable kind.
When the box is to be opened the strip d is placed in the ordinary manner
in the key and the latter is turned around and by this the strip section between
the dotted lines b b is torn out all round and the cover is quite loosened from
the box.
This method of opening compared with the methods hitherto used has the
following advantages:
1). No part of the cover stands back after the opening, and accordingly the
substance of the box is easily removed.
2). As the cover torn out is of the very same size as the box it can be used
afterwards to cover the substance, not used at once.
3). The upper part of the folded edge remaining on the box after the opening;
no sharp edge is formed so that after being emptied the box can be used for
other purposes.
4). The strip d being on the interior side of the folded edge of the cover it is
out of the way and can not be loosened.
5). As the vertical folded wall of the cover has no joint said cover can be
entirely loosened from the box-by tearing out the sectional strip.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is:-
A method of opening hermetically sealed boxes by making two parallel notches
in the interior vertically folded wall of the cover and all around the same to

page_text: weaken the sheet-metal soldering of a strip on the said wall between the notches
to ensure a hold for the key all arranged so as to tear out a sectional strip from
the vertically folded wall of the cover in such a manner, that no sharp edge is
formed after the opening.
Dated this 13th day of August 1898
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.