Improvements in the Manufacture or Production of Metallic Boxes and like Receptacles.
Year: 1895

page_text: Date of Application, 5th Feb., 1895
Complete Specification Left, 5th Nov., 1895-Accepted, 7th Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture or Production of Metallic Boxes
and like Receptacles.
We, JAHNCKE LIMITED, Manufacturers, ERNST AUGUST JAHNCKE, Managing
Director, and FRIEDRICH AUGUST GOTTHELF GMELIN, Engineer, all of
Canonbury Works, Dorset Street, Islington, in the County of London, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to improvements in the manufacture or production of
metallic boxes, and like receptacles, and more particularly of the kind or class in
which the lid and body are of the same diameter or dimensions, and the lid fits
over a contracted portion or neck formed in one with the body of the box, and
rests against a set-off or ledge at the base of the neck.
The object of our invention is to improve the appearance and finish of such
boxes, or like articles, and to so construct them that the lid and body shall be
quite flush with each other, and that there shall be no gap or inequality between
them, and this advantage we obtain as hereinafter described.
In carrying out our invention, the body or shell of the box, or the like, is
stamped or drawn up in the usual manner, and its upper part is then contracted so
as to reduce its diameter, or dimensious, and to produce a conical or inclined
portion from which the set-off or ledge is to be formed. We then operate on this
inclined or conical portion, by means of rollers, or other suitable machine tools,
so as to force one part of the said inclined or conical portion inward, while the
other part is simultaneously forced outward so forming the set-off or ledge. This
constitutes a very important feature in our invention, as it practically obviates any
gap or inequality when the lid is fitted on, and thereby materially improves the
appearance and finish of the box.
In some cases the set-off or ledge may be formed upon the lid of the box instead
of upon the body.
Improvements in the Manufacture or Production of Metallic Boxes
and like Receptacles.
We, JAHNCKE LIMITED, Manufacturers, ERNST AUGUST JAHNCKE, Managing
Director, and FRIEDRICH AUGUST GOTTHELF GMELIN, Engineer, all of
Canonbury Works, Dorset Street, Islington, in the County of London, 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
го

page_text: statement, reference being had to the accompanying drawings and to the letters
and figures marked thereon, that is to say :-
Our invention relates to improvements in the manufacture or production of
metallic boxes, and like receptacles, and more particularly to the kind or class in
which the lid and body are of the same diameter or dimensions, and the lid fits
over a contracted portion or neck formed in one with the body of the box, and
rests against a set-off or ledge at the base of the neck.
The object of our invention is to improve the appearance and finish of such
boxes, or like articles, and to so construct them that the lid and body shall be
quite flush with each other, and that there shall be no gap or inequality between
them, and this advantage we obtain as hereinafter described.
In carrying out our invention, the body or shelf of the box, or the like, is
stamped or drawn up in the usual manner, and its upper part is then contracted
so as to reduce its diameter or dimensions to the size of the intended neck while,
at the same time, a further part is contracted so as to produce an inclined face or
portion between the intended neck and the body proper of the box for the purpose
of forming the set off or ledge. We then operate on this inclined or conical
portion by means of rollers, or other suitable machine tools, so as to force one part
of the said inclined or conical portion inward, to continue the contracted portion
forming the neck, while the other part is simultaneously forced outward, to
continue the diameter of the body of the box, thus forming the set-off or ledge.
This constitutes a very important novel feature in the manufacture of metallic
boxes as it practically obviates any gap or inequality when the lid is fitted on,
and by ensuring a perfect fit materially improves the appearance and finish of
the box.
Our invention will be readily understood on reference to the accompanying
drawings, which indicate three stages in the mauufacture of a box according to our
improvements.
Fig. 1 shows in elevation the stamped or drawn up shell to constitute the body of
the box, prior to the formation of the inclined or conical portion from which the set
off or ledge is to be formed.
Fig. 2 shows, so in elevation, the box body a, after the contracted portion or
neck ò has been formed thereon, and c represents the inclined or conical portion left
between a and b, and before it has been operated on.
Fig. 3 shows, likewise in elevation, the box body after the said inclined or conical
portion has been operated on by the rollers, or other machine tools, and the set off
or ledge d, duly formed.
With a box body, such as that described, the lid, which is preferably likewise
stamped or drawn up, fits over the contracted portion or neck b, its lower edge
abutting and fitting closely against the set-off or ledge d and forming a flush joint
therewith.
Obviously, however, the contracted portion or neck and the set off or ledge,
instead of being formed upon the box body, might be formed upon the lid, and the
body itself might be plain. In such case the lid would fit in the body of
the box, and the set off or ledge would abut against the upper edge of the box
body.
In some cases, the inclined face is made in two or more steps or portions
of gradually increasing diameters, and, as in the previous case, approximately one
half of the inclined face is driven inward, to the diameter of the neck of
the box, while the other half is driven outward, to the diameter of the body of
the box.
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. In the manufacture of metallic boxes, or like receptacles, the method of
producing the set off or ledge; substantially as described.

page_text: 2. Metallic boxes, or like receptacles, having their set off or ledge produced as
herein before described.
3. The application of the hereindescribed method, of producing the set-off or
ledge, to the manufacture of the lids of metallic boxes, or like receptacles.
Dated this 5th day of November 1895.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 54, Market Street, Nottingham,
Agent for the Applicants.