Improvements in Sheet Metal Cans.
Year: 1891

page_text: Date of Application, 1st Dec., 1891
Complete Specification Left, 15th Mar., 1892-Accepted, 9th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Sheet Metal Cans.
I, FRANK HAZEN PALMER of 244, Plymouth Street, Brooklyn, in the County
of Kings, and State of New York, United States of America, Manufacturer, do
hereby declare the nature of this invention to be as follows:-
My invention relates to a sheet metal can in which the cover may be readily
applied to, and be so locked upon, the mouth of the can as to effectually prevent
leakage.
The invention consists of a can having a frusto-conical open end adapted to be
engaged by a circular flange of the cover.
The invention further consists of a packing disc held in the under side of the
cover and engaged by the upper, doubled-up, edge of the frusto-conical edge of
the cone the contact being at a distance from the edge of the packing disc and the
doubled-up edge firmly engaging the packing without cutting the same.
In order to conveniently form the frusto-conical end on the can-body, the blank
for the latter has one end bent outward upon itself to form a projection on the
outside of the blank and this end of the blank is then again bent outward upon
itself, so that the projection is a considerable distance below the upper edge of the
blank. The doubled-up part is then passed between rollers so as to be pressed
inward thereby forming the frusto-conical end. Other suitable means may be
employed for bending the doubled-up part inward to the desired form. In forming
the doubled-up part, the upper edge of the can body is rounded off and this edge
prejects a considerable distance inward from the sides of the body so that the
packing disc contacts with its rounded edge at a suitable distance from the edge
of the packing, while the round part of the edge does not cut into the packing
and destroy its efficiency. In order to conveniently lock the cover to the can
body, the top of the cover is formed with a diametrical groove tapering downward
from the middle to the ends. At the middle or highest part of the groove is held
an eye through which passes a bail made of spring wire and having its ends
curved downward over the sides of the can, the extremities being provided with
inwardly-extending lugs adapted to engage the underside of the projection on the
can body. The eye is preferably made in the shape of a clip the ends of which
are passed downward through a slot in the top of the cover, the ends of the clip
being bent in opposite directions upon the underside of the cover. The bent-over
ends of the clip are then soldered in place, the solder passing completely over and
around the inner ends of the clip or eye so that the slot in the cover is completely
closed up to prevent leakage of the contents of the can and the bail is rigidly
secured to the eye. Thus it will be seen that when the several parts are in place,
the lower end of the flange of the cover fits snugly upon the outside of the frusto-
conical end at the doubled-up part. The underside of the packing disc rests on
the upper edge of the frusto-conical end and the bail securely holds the cover in
place by its end being pressed downward so that the lugs snap under the
projection. The cover is thus securely locked in place on the can and the upper
edge of the frusto-conical end is firmly pressed in contact with the packing disc.
without cutting the latter.
Dated this 1st day of December 1891.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Sheet Metal Cans.
1, FRANK HAZEN PALMER of 244, Plymouth Street, Brooklyn, in the County
of Kings and State of New York, United States of America, Manufacturer, 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-
The object of the invention is to provide a new and improved sheet metal can
in which the cover may be readily applied to and be so locked upon the mouth of
the can as to effectually prevent leakage.
The invention consists of a can having a frusto-conical open end adapted to be
engaged by a circular flange of the cover.
The invention further consists of a packing disc held in the under side of the
cover and engaged by the upper doubled-up, edge of the frusto-conical edge of
the cone, the contact being at a distance from the edge of the packing disc and
the doubled-up edge firmly engaging the packing without cutting the same.
The invention also consists of certain parts and details and combinations of the
same, as will be hereinafter fully described and then pointed out in the claims.
Reference is to be had to the accompanying drawings, forming a part of this
Specification, in which similar letters of reference indicate corresponding parts in
all the figures.
Figure 1. is a side elevation of the improvement.
Figure 2. is a sectional side elevation of the same.
Figure 3 is a transverse section of the cover, on the line 3-3 of Figure 4.
Figure 4 is an inverted plan view of the cover, and
Figures 5, 6, and 7, are sectional elevations illustrating the forming of the
frusto-conical end of the can body.
The upper end or mouth B of the body A of the can is formed in the shape of
the frustum of a cone the outside of which is engaged by the lower end of the
annular flange C projecting downward from the cover D. In the under side of
the latter is held a packing disc E made of a suitable material and engaged at its
under-side by the upper edge of the frusto-conical end B of the can body. In
order to conveniently form this frusto-conical end B on the can body A, the blank
for the latter has one end bent outward upon itself to form a projection B¹ on the
outside of the blank, as is plainly illustrated in Figure 5. This end of the blank
is then again bent outward upon itself as at B, Figure 6, so that the projection B
is a considerable distance below the upper edge of the blank. The doubled-up
part B is then passed between rollers so as to be pressed inward, as illustrated
at B3, Figure 7, thereby forming the frusto-conical end B. Other suitable means
may be employed for bending the doubled-up part B² inward to the desired form.
It will be seen that in forming the doubled-up part 2 the upper edge of the can
body is rounded off and this edge projects a considerable distance inward from the
sides of the body so that the packing disc E is engaged by its rounded edge a
suitable distance from the edge of the packing, while at the same time the round
part of the edge does not cut into the packing and destroy its efficiency.
In order to conveniently lock the cover D to the can body A, the top of the
cover is formed with a diametrical groove D' tapering downward from the middle
to the ends, as is plainly illustrated in Figure 2. At the middle or highest part
of the groove D' is held an eye G through which passes a bail F made of spring
wire and having its ends curved downward over the sides of the can, the ends
being provided with inwardly-extending lugs F adapted to engage the underside
of the projection B formed on the can body A as previously described. The
eye G is preferably made in the shape of a clip the ends of which are passed

page_text: downward through a slot in the top of the cover D the ends of the clip.
being bent in opposite directions upon the under side of the cover, as is plainly
illustrated in Figure 3. The bent-over ends of the clip are then soldered in
place, the solder passing completely over and around the inner ends of the clip or
eye so that the slot in the cover is completely closed up to prevent leakage of the
contents of the can and the bail F is rigidly secured to the eye (t.
It will be seen that when the several parts are in place, as illustrated in
Figure 2, the lower end of the flange C fits snugly upon the outside of the frusto-
conical end B at the doubled-up part B². The upper edge of the frusto-conical
end engages the under side of the packing disc Ea suitable distance from the
edge of the latter and the bail F securely holds the cover D in place by its end
being pressed downward so that the lugs F¹ snap under the annular projection B'..
The cover D is thus securely locked in place on the can A and the upper edge of
the frusto-conical end B is firmly pressed in contact with the packing disc E
without cutting the latter. A sheet metal can constructed in this manner, has its
body greatly re-enforced and strengthened by doubling up the upper ends of the
blank in the manner above described. By making the upper end in the shape of
a frustum of a cone the flange C of the cover is readily placed in position and
makes a tight fit on the outside of the end B when presssed downward in fastening
the bail F to the can body A as above described. The annular projection B' also
forms a stop for the flange C of the cover D. By holding the bail F in the eye or
clip G, a displacement of the said bail is not possible, as the bail is securely
fastened in place by the clip G to the cover.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is-
1. A sheet metal can comprising a body made of a single piece of sheet metal
and having a doubled-up frusto-conical end, a packing disc adapted to be placed
across the doubled-up frusto-conical end of the said body and a cover formed with
an annular cylindrical flange adapted to engage with its lower end, the outside of
the said frusto-conical end, the under side of the cover resting on the top of the
said packing disc, substantially as shown and described.
2. A sheet metal can provided with a body made of a single piece of sheet
metal and having a doubled-up frusto-conical end and a doubled-up annular
projection arranged on the lower edge of the outer part of the said doubled-up
end, substantially as shown and described.
3. In a sheet metal can, the combination, with a body having a frusto-conical
end the upper edge of which is rounded and an annular projection formed on the
outside of the can body the latter as well as the frusto-conical end and the
projection being made of a single piece of sheet metal bent in the manner
described, of a packing disc adapted to be placed across the frusto-conical end of
the said can body, a cover engaging the said packing disc and formed with a.
downwardly-extending annular Hange engaging the said frusto-conical end, and a
bail held on the said cover and having inwardly-projecting logs at its ends
adapted to engage the annular projection on the can body, substantially as shown
and described.
4. In a sheet metal can, the combination, with a body having a frusto-conical
end the upper edge of which is rounded and an annular projection formed on the
outside of the can body the latter as well as the frusto-conical end and the
projection being made of a single piece of sheet metal bent in the manner
described, of a packing disc adapted to be placed across the frusto-conical end of
the said can body, a cover engaging the said packing disc and formed with a
downwardly-extending annular flange engaging the said frusto-conical end, a bail
held on the said cover and having inwardly-projecting lugs at its ends adapted to
engage the annular projection on the can body, and an eye or clip secured in the.

page_text: middle of the said cover and carrying the said bail, substantially as shown and
described.
Dated this 15th day of March 1892.
F.. PALMER,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.