Year: 1888

page_text: 1, HENRIK WORN, of Botolph House, Eastcheap in the City of London, Gentleman,
do hereby declare the nature of this invention to be as follows:-
Tins are now commonly closed by means of a strip of metal which is soldered both
to the body and to the lid, the tin being opened by tearing off this strip winding it up
upon a key whose end is split to receive and hold the end.
According to this invention I dispense with the separate strip and I make the tin so
that it can be opened as above described by tearing out a strip of the metal forming
the body or it might be the lid.
On each side of the strip of metal which is to be torn out I make a shoulder or
indentation which may readily be done by rolling a single groove of the same width as
the strip across the sheet of metal from which the box is to be made. When once started
the metal readily tears all along the shoulders at each side of the groove where the abrupt
change in form of the surface takes place. In order to start the tear I make two short
slits one on each side of the groove cut at the edge of the sheet where (when the tin is
made up) it overlaps the other edge and the tongue so formed at the end of the strip
is not soldered down with the rest of the overlapping joint but is left free to be taken
hold of by the split key. Two narrow parallel grooves the width of the strip apart
may be substituted for the single groove.

page_text: I, HENRIK WORN of 3 Lothbury in the City of London; 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:-
Tins are now commonly closed by means of a strip of metal which is soldered
both to the body and to the lid the tin being opened by tearing off this strip winding
it up upon a key whose end is split to receive and hold the end.
According to this invention I dispense with the separate strip and I make the
tin so that it can be opened as above described by tearing out a strip of the
metal forming the body or it might be the lid.
On each side of the strip of metal which is to be torn out I make a shoulder
or indentation which may readily be done by rolling a single groove of the same
width as the strip across the sheet of metal from which the box is to be made.
When once started the metal readily tears all along the shoulders at each side of
the groove where the abrupt change in form of the surface takes place. In order
to start the tear I make two short slits one on each side of the groove cut at the
edge of the sheet where (when the tin is made up) it overlaps the other edge and
the tongue so formed at the end of the strip is not soldered down with the rest
of the overlapping joint but is left free to be taken hold of by the split key.
Two narrow parallel grooves the width of the strip apart may be substituted for the
single groove.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation of a closed tin constructed according to my invention..
Figure 2 is a similar view of the tin in process of being opened, figure 3 a
vertical section of the tin and figures 4 are views of the key used for opening it.
The tin, shown is made in three pieces soldered together, namely the body a
the lid and the bottom c.
The upper part of the sheet of metal of which the body a is formed is shown
separately at Figure 5.
The body a of the tin has a groove d formed in it near the top. At the two
sides of one end of this groove two short slits ee are formed leaving the tongue f
between them. To open the box the slot in the key figure 4 is threaded on to
the tongue and the key turned round. The strip of metal at the bottom of
the groove d is thereby torn away and is wound up on the key as shown in figure 2

page_text: 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 1
claim is: -
.
1. Tins provided with grooves or projections to guide the tearing of the metal
in opening substantially as described.
2. The slits ee for starting the tear at the sides of the strip of metal to be
torn out.
3. Tins substantially as described and shown in the drawings.