Improvements in or relating to Fitting Lids or Covers to Sheet Metal Cans or other like Receptacles.
Year: 1887

page_text: Date of Application, 9th Dec., 1887
Specification Accepted, 13th Jan., 1888
'
Improvements in or relating to Fitting Lids or Covers to Sheet
Metal Cans or other like Receptacles.
We, WILLIAM THOMAS SEYMOUR and the firm of SEYMOUR AND COMPANY, Limited,
of Stockton-on-Tees, in the County of Durham, Tin Plate Workers, 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 the means employed for fitting lids or covers to such
articles as sheet metal cans or other like receptacles in which the lid or cover
slides into or out of position between two sheet metal edges forming sides or
boundaries to the mouth or aperture thereof.
The method heretofore adopted for effecting the requisite fit between the lid or
cover and the adjoining parts of the sheet metal can or receptacle forming the
edges or boundaries of the mouth or aperture is by soldering a strip of sheet
metal along one of its edges to the under or inner side of the said adjoining sheet
metal, the opposite edge of this strip of sheet metal which corresponds to the
sheet metal edge of the mouth or aperture is detached therefrom and forms the
groove required for the lid or cover to slide in.
The object of our invention is to dispense with the operation of soldering a
separate strip of metal to the inner surface of the sheet metal side, end, or other
part of the can or receptacle for the purpose of forming grooves in the manner
described, and to substitute therefor the improved method of forming the grooves
hereinafter described and illustrated in the accompanying drawings, in which Figs. 1
and 2 illustrate in sectional view taken on line XX of Figs. 3 and 4 respectively,
that portion of the end, side, or other part of a sheet metal can or receptacle in
which is formed the mouth or aperture thereof; Figs. 3 and 4 are plan views
corresponding respectively to the sectional views in Figs. 1 and 2, but with the
lid or cover partially withdrawn to more clearly illustrate the formation of the
grooves; Fig. 5 is a sectional view taken along line Y Y of Fig. 3, with the lid or
cover removed.
That part of the surface of the can or receptacle which forms the edge or border
of the mouth or aperture is indicated by the letters a¹ a² a³, b is the lid or cover
along the sides of which the grooves c¹ c² are provided to enable the said lid or
cover to slide in or out of position as required. The improved formation of the

page_text: grooves c¹² as illustrated in Figs. 1 and 3 constitutes the essential feature of our
invention, by which we are enabled to construct the lid b to overlap the adjoining
surfaces a¹ a² a³ to any required extent, and by bending down the edge a³ at the end
of the mouth or aperture in the manner shown in Fig. 5 to stiffen the top, end, or
other part of the can or box at its weakest part. The grooves c¹ c² in Figs. 1 and 3
are formed by folding the edges 6162 close underneath the lid or cover b so as to
extend as an underlap for any required distance from the edges of the said lid and
preferably in close contact therewith; by folding the edge back again to its original
direction as a second underlap, the groove is formed between the first and second
underlaps in the manner shown. Grooves c¹² provided along the two sides 61 62 of the
lid or cover are found to be effective in securing the said lid or cover in close contact
with the surfaces it overlaps sufficiently to keep the can or receptacle tightly closed
up when subjected to bulging or other strains, the edge a³ instead of fitting into a
groove in the lid is turned down or curved inwards in the manner illustrated in
Fig. 5. so that the projection d acts as a stiffener to that part of the can or receptacle
which forms the end of the mouth or aperture and which has been most weakened
thereby. In Figs. 2 and 4 we illustrate a modification of our invention in which the
grooves c¹ c² are formed on the under or inner sides of the surfaces a¹ a², but generally
we do not prefer this mode of fitting the lid b to the can or receptacle, as in this case
the lid underlaps instead of overlaps the adjoining surfaces a a² a³, and the
stiffening edge must either be dispensed with or the line of division between the
edge 6 of the lid and adjoining edge a³ of the can must be left unprotected with an
overlap, to avoid which we provide a groove c³ on the underside of the surface a³,
into which the end 63 of the lid or cover extends so as to form a suitable underlap.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be applied to sheet metal cans or
the like receptacles which are closed and opened by a lid or cover sliding into or out
of position for that purpose, what we claim is :-
:-
Firstly The improved combination and arrangement of parts by which the lid
or cover is furnished with grooves fitted to the can or other like receptacle as herein-
before described with reference to Figs. 1 and 3 of the accompanying drawings.
Secondly-The combination and arrangement of parts by which grooves are
furnished in the can or other like receptacle and the lid or cover be fitted thereinto
as herein before described with reference to Figs. 2 and 4 of the accompanying
drawings.
Thirdly The employment of the stiffening ridge d in combination with the
arrangement of parts for fitting lids or covers to cans or other like receptacles
in the manner hereinbefore described with reference to the accompanying
drawings.
Dated this 8th day of December 1887
G. J. CLARKSON,
Agent for the Applicants.