Improvements in and relating to Tin or Sheet Metal Boxes:
Year: 1895

page_text: Date of Application, 13th Apr., 1895
Complete Specification Left, 11th Jan., 1896-Accepted, 15th Feb.. 1896:
PROVISIONAL SPECIFICATION.
Improvements in and relating to Tin or Sheet Metal Boxes:
We, ARCHIBALD GRAHAM, Tinsmith, of 9 Braco Street, and JOHN KAY,
Manufacturer, of 5 Roseberry Terrace, Kelvinbridge, both in the County of
the City of Glasgow, do hereby declare the nature of our invention to be as
follows:
This invention relates to improvements in and relating to tin or sheet metal.
boxes.
Our present improvements consist in forming a projecting bead on the two.
opposite jointing vertical sides, of the box. This bead is formed on the inner
surface of the box sides just inside where the folded joint is made along the two
vertical and bottom horizontal edges, and the bead will project up and form with.
the folded parts an efficient fluid tight joint which will require no solder, and form.
a locking joint. To form the projecting bead the opposite surfaces of box have to
be indented, and this is effected when the box has been made by placing a die or
matrix board inside the box having its end parts below the level of the centre
part; and in having a die plate mounted in a screw or other press which shall
come down and form the indentations on the box to produce the projecting beads.
on inner surface.
The die would preferably be of a V rounded or recessed section at the parts.
where the indentations are to be formed in the box.
Dated the 12th day of April 1895.
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.
Improvements in and relating to Tin or Sheet Metal Boxes.
We, ARCHIBALD GRAHAM, Tinsmith, of 9 Braco Street, and JOHN KAY,
Manufacturer, of 5 Rosebery Terrace, Kelvinbridge, both in the County of
the City of Glasgow, do hereby declare the nature of our invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement in writing, that is to say :-
This invention relates to improvements in and relating to tin or sheet metal boxes
and comprises improvements on our former Patent No. 22,229 November 17 1894.
And in order that our said invention and the manner of carrying same into
practice may be properly understood, we have hereunto appended an explanatory
sheet of drawings in which the same reference letters are used to indicate
corresponding parts in the several figures where shown.
Figure is an elevation in perspective of a sheet metal box as formed in
accordance with our improvements.
Figure 2 is a horizontal section as taken on the line 2-2 Figure 1, and Figure 3 is.
a vertical section as taken on the line 3-3 Figure 1.

page_text: Figure 4 is an elevation of a screw press, with die and matrix as used for
carrying our improvements into practice, while Figure 5 is a detached sectional
view of the matrix at right angles to that shown in Figure 4.
Referring to these drawings:-
Our present improvements consist in forming a projecting bead a¹ on the opposite
jointing vertical sides a of the box. This bead a' is formed on the inner surface of
the box sides just outside where the folded joint b is made along the two vertical
and bottom horizontal edges, and the bead a' will project up and form with the
folded parts b an efficient Huid tight joint which will require no solder, and form a
locking joint. To form the projecting bead a' the opposite surfaces a of box have
to be indented and this is effected when the parts have been put together and the
box has been made by placing the box over a die or matrix piate c as shown
in Figure 4. This matrix c is formed with a groove or recess c¹ on three of its
sides near the edges corresponding to that a² to be formed on the bottom and two
side edges of the two opposite surfaces a of box; and this matrix c is preferably
formed with a centre feather c³ so that it may slide out and in in a groove formed
in a fixed bracket D' projecting out from frame D of screw or other press, and thus
give easy facilities for placing and removing the box, or replacing different sizes of
matrixes. A die plate d is secured to the lower end of the spindle D² of a screw
press D and this die plate is formed with projecting beads d¹ of V or other section
round three of its sides so as to bear over and press the outer surface of box
opposite the corresponding grooved parts e in matrix c when actuated by the
haudle D³ of an ordinary screw press, and by this means the indentations u³ are
formed on the side of box being operated on to produce projecting beads a¹ on
inner surface and these form an efficient joint. The box is then removed from
matrix c and after being inverted to place its opposite side on top is again placed
on matrix to form the indentations a² and beads a¹ and joint the two opposite side
edges and bottom of box.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
In tin or sheet metal boxes, the forming of a projecting bead on the inner
surface of the sides of box substantially as and for the purposes berein set
forth.
Dated 10th January 1896
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.