Improvements in the Construction of Tin or Sheet Metal Boxes.
Year: 1894

page_text: Date of Application, 17th Nov., 1894
Complete Specification Left, 17th Aug., 1895-Accepted, 21st Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Tin or Sheet Metal Boxes.
We, ARCHIBALD GRAHAM, of 9 Braco Street, Tinsmith, and JOHN KAY,
of 5 Roseberry Terrace, Kelvinbridge, Manufacturer, both in the City and
County of Glasgow, do hereby declare the nature of our invention to be as
follows:-
:―
This invention has reference to and comprises improvements in the construction
of tin or sheet metal boxes, such as biscuit boxes or the like, in which the sides ends,
and bottom are secured together by folding over the edges on one another, and
which will render such boxes more durable and leave the outer surface free from
projecting parts or flanges which in ordinary boxes interfere with and damage the
labels or paper covers usually put on such, and they can also be made without the
use of any solder.
In carrying out the improvements of this invention say in making a tin biscuit
box, a sheet of tin would be cut of a size to form the two sides and the bottom'of
the box with a marginal allowance of, may be, half an inch for the folding over
and wiring processes. The corners of this sheet of tin would then be cut off, and
at the parts where the sheet would be folded up to form the sides a square 'or
diamond shaped piece would be cut or punched out of each side edge. The half
inch marginal edge would then be bent, in an ordinary squaring machine fitted with
appropriate tools, inwards at right angles, and doubled over outwards, thus forming
a groove along both edges open towards the outside of the box. The two sides of
the box being folded up to right angles with the bottom, the wire cut to the
required length, and formed to the shape of the box would be secured to the inside
of the top side edges by folding over the marginal part so as to enclose the wire,
and the box so far formed would be ready for the ends. These ends would be
formed by cutting a sheet of tin to the required size with a marginal allowance on
three sides of, it might be, a quarter of an inch for the folding process and on one
side of half an inch for the wiring process. The corners would be cut off and the
marginal edge on three side be bent over so as to point inwards. These bent over
edges would be entered into the grooves on each side of the partly formed box from
the bottom and be pushed up until the bottom edge entered the bottom groove
when the upper marginal edge would be turned over on the wire and the end of the
box be thus completed. The joints would be compressed in a screw or other
press to flatten them tightly together, or other means such as rolling would be used
for this purpose. The box thus made requires no solder to hold it together but if
so desired the seams could be soldered to make them water tight when intended for
goods for shipment. When the top edge of the box was not wired it might be
simply turned over and flattened. The lids for such boxes as described might be of
any ordinary make.
Dated the 16th November 180A
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.

page_text: Improvements in the Construction of Tin or Sheet Metal Boxes.
We, ARCHIBALD GRAHAM of 9, Braco Street, Tinsmith, and JOHN KAY,
of 5, Roseberry Terrace, Kelvinbridge, Manufacturer, both in the City and County
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 :-
Our invention has reference to and comprises improvements in the construction
of tin or sheet metal boxes, such as biscuit boxes or the like, in which the sides,
ends and bottoms are secured together by folding over the edges on one another
aud which will render such boxes more durable, and leave the outer surface free
from projecting parts or flanges which in ordinary boxes interfere with and damage
the labels or paper covers usually put on such, and they can also be made without
the use of solder, and in order that our said invention may be properly understood,
we have hereunto appended one sheet of explanatory drawings.
In carrying out the improvements of our invention say in making a tin biscuit
box, a sheet of tin is cut of a size to form the two sides A, and the bottom B of the
box as shown in Figure 1 with a marginal allowance of, it may be, half an inch for
the folding over, and wiring processes. The corners of this sheet of tin are then
cut off at a, and at the parts b, where the sheet would be folded up to form the sides,
a square or diamond shape piece is cut or punched out of each side edge. The half
inch marginal edge A', B', 'A', is then bent in an ordinary squaring machine fitted
with appropriate tools first inwards at right angles, and then doubled over outwards,
thus forming a groove along both edges open towards the outside of the box
as shown more particularly in Figures 2, 5 & 7. The two sides A, A, of the box
being folded up to right angles with the bottom B, the wire C, cut to the required
length, and formed to the shape of the box is secured to the inside of the top side
edges by folding over the parts A2 so as to enclose the wire C, and the box so far
formed, as shown in Figure 1, is ready for the ends. These ends, D, are formed by
cutting a sheet of tin to the required size with a marginal allowance on three sides
of, it may be, a quarter of an inch for the folding process, and on one side of half
an inch for the wiring process. The corners are cut off at d and the marginal
edge D' on three sides is bent over so as to point inwards as shown in Figures 3
and 7. These bent over side edges D' are entered into the grooves on each side of
the partly formed box from the bottom as shown in Figure 4 and the eud D
is pushed up until the bottom edge D' enters the bottom groove at B¹ when the
upper marginal edge D² is turned over on the wire C and the end of the box thus
completed. The joints, the nature of which is more particularly shown in Figure 7,
are compressed in a screw or other press to flatten them tightly together or other
means, such as rolling, may be used for this purpose. The box thus made requires
no solder to hold it together, the sides, bottom and ends being securely locked
together; but if so desired, the seams can be soldered to make them water tight
when intended for goods for shipment. When the top edge of the box is not wired,
it may be simply turned over and flattened. The lids for such boxes as described
may be of any ordinary make.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed we declare that what we
claim is
1. The construction of tin or sheet metal boxes requiring no solder to secure the
joints all substantially in the manner as herein described and illustrated by the
accompany

page_text: 2. The construction of tin or sheet metal boxes by folding over the edges of the
sides, bottom, and ends, and inserting the turned over edges of the ends within the
grooves formed on the edges of the sides and bottom all substantially as herein
described and illustrated by the accompanying drawings.
Dated this the 12th day of August 1895.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.