Year: 1888

page_text: Date of Application, 12th Apr., 1888
Complete Specification Left, 14th Jan., 1889
Complete Specification Accepted, 16th Feb., 1889
SEC.
I, GEORGE FEATHERSTONE GRIFFIN, of the Albion Tin Works, York Road, Kings.
Cross, London, in the County of Middlesex, Civil Engineer, do hereby declare the
nature of this invention to be as follows:-
This Invention relates to improvements applied to metallic boxes, cans, canisters,
or receptacles such as are shown and described in the Specifications to my Letters
Patent Nos. 1301 of 1882 and 1187 of 1884, with the object of more hermetically
sealing lids or covers upon such boxes; it also relates to improved apparatus for
manufacturing the same.
In addition to the projecting flange at the top of the lid or cover by the aid of which
it is levered off the body in opening the box, I now make a flange at the bottom
edge of the same, which flange when the lid or cover is pressed down, closing the
box, will be seated upon a corresponding surface which I form in the ordinary groove
or recess of boxes of my system, or upon any suitable packing which I may place
in such groove or recess.
1 may form this double flange of the lid or cover by the ordinary wheeling process,
or by any other method which I may find convenient, or I may adopt the following
novel mode of manufacture.
I take a piece of metal, say tin or tin plate, of the necessary size and press it into
a die of two different diameters, the larger diameter having the bottom or sealing
flange left upon it. The smaller diameter having been given the necessary depth, is,
upon another die, pressed down so as to spread and allow of an overhang which
forms the upper flange by which to lever off the lid or cover.
I make provision in the formation of the die to prevent the metal being forced out
of shape and to obviate the necessity of supporting the sides of same.

page_text: UOMITETE SPECIFICATION.
Improvements in Boxes, Cans, Canisters, or Receptacles for Holding
Alimentary and other Substances, and in the Manufacture of the
same.
I, GEORGE FEATHERSTONE GRIFFIN, of the Albion Tin Works, York Road, Kings
Cross, London, in the County of Middlesex, Civil Engineer, 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 improvements applied to metallic boxes, cans, canisters
or receptacles opened by the use of a lever in the manner set forth and described in
the specifications to my Letters Patent No. 1301 of 1882 and 1187 of 1884, the
object of my present invention being the more hermetically sealing lids or covers
upon such boxes or receptacles.
I attain this object by the formation of the lid or cover and its seating as illustrated
on the accompanying drawing, in which:-
Figures 1 and 2 are sections through cans of forms described and shown in the
specification to my aforesaid patents and Figures 3 and 4 similar sections through a
form of can embodying this invention; Figure 3 shewing cover detached-and
Figure 4 cover closing body the flange E resting upon the packing but not fully
pressed down.
A indicates the body of the box or can-B the lid or cover-C projection or ledge
of lid or cover by which it is to be levered off; D inclined flange of same, E additional
flange of this invention-F seat or recess for same--G wax or other sealing substance
-H fulcrum for lever, I inclined neck of body.
It will be seen that in addition to the projecting flange C of the lid of my
previously patented forms (Figs. 1 and 2), I now make a flange E at the bottom
edge of the flange D (see Fig. 3), which flange E, when the lid or cover is pressed
down, (closing the box by the wedge action of flange D of lid B on the inclined
neck 1 of the body and grip of metal upon metal secured thereby) (as at Fig. 4) will
be seated upon the corresponding surface F, which I form in the ordinary groove or
recess of boxes of my system, or upon any suitable packing which I may place
upon F.
I may form this double flange of the lid by the ordinary wheeling process, or by
any other method which I may find convenient; or I may adopt the following novel
mode of manufacture.
I take a piece of metal, say tin or tin plate, of the necessary size and press it into
a die of two different diameters, the larger diameter having the bottom or sealing
flange left upon it. The smaller diameter having been given the necessary depth, is,
upon another die, pressed down so as to spread and allow of an overhang-which
forms the upper flange by which to lever off the lid or cover. Or I may form the
double flange of the lid B in the following way :-I first draw up the lid in a press by
an ordinary combination tool, forming the flange E as illustrated Fig. 5 of the

page_text: Drawing. I then put it upon a wheeling machine and make a small bead b, as at
Fig. 6, so as to allow of the lid bending at this point when pressure is applied. I
then put it upon a die the inside edge of which supporting the bead 6 allows of the
upper portion of the lid B when pressed down forming the flange C by which to
lever the lid off.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is :-
1. In a box, can, canister, or receptacle for holding alimentary or other substances,
the flange E on the lid or cover B in combination with the recessed seat F and the
inclined neck I by which to wedge and tighten it on the body A substantially as
described for the purpose specified.
2. A lid or cover for boxes, cans, canisters, or receptacles for holding alimentary
and other substances, having the flanges E and C substantially as described for the
purpose specified.
3. The manufacture of the lid or cover with double flange E C substantially as
described and illustrated on the accompanying drawing.
Dated this Twelfth day of January 1889.
G. FEATHERSTONE GRIFFIN.