U.S. patent number 3,878,963 [Application Number 05/316,824] was granted by the patent office on 1975-04-22 for container or can bottom.
This patent grant is currently assigned to Lippy Can Co., Ltd.. Invention is credited to Elmer J. Knize.
United States Patent |
3,878,963 |
Knize |
April 22, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
Container or can bottom
Abstract
A can or container having a bottom formed with a central
convexo-concave portion which continues downwardly at its
peripheral edge to form a bend and then extends upwardly in a
substantial vertical plane to substantially the height of the top
horizontal plane of the convexo-concave central portion and then
continues outwardly and downwardly and is secured to the body of
the container. This shape of the bottom is maintained until the
container is occupied with contents and when the lid is applied to
the top of the container the air will be trapped in the container
and the compressed air together with the contents will cause the
annular convexo-concave portion to bulge downwardly and form a
concave or concavo-convex dish-shaped annular central portion, and
when the container receives a shock, such as when striking against
a surface, the central concavo-convex bottom will bulge further
outwardly and extend below the bottom horizontal plane of the
bottom of the container. The said structure also permits the can to
be stacked on other cans in an interlocking relationship.
Inventors: |
Knize; Elmer J. (Chicago,
IL) |
Assignee: |
Lippy Can Co., Ltd. (Chicago,
IL)
|
Family
ID: |
23230845 |
Appl.
No.: |
05/316,824 |
Filed: |
December 20, 1972 |
Current U.S.
Class: |
220/623; 220/635;
220/620 |
Current CPC
Class: |
B65D
43/0218 (20130101); B65D 7/42 (20130101); B65D
21/0222 (20130101); B65D 2543/00509 (20130101); B65D
2543/00555 (20130101); B65D 2543/00537 (20130101); B65D
2543/00277 (20130101); B65D 2543/00435 (20130101); B65D
2543/00092 (20130101) |
Current International
Class: |
B65D
43/02 (20060101); B65D 21/02 (20060101); B65d
007/42 (); B65d 021/00 () |
Field of
Search: |
;220/67,66,42C,97F,97R
;206/508,503,509 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Price; William I.
Assistant Examiner: Shoap; Allan N.
Attorney, Agent or Firm: Kraus; Max R.
Claims
What is claimed is:
1. A container and a bottom for said container, said bottom having
a central annular convexo-concave central portion having an annular
peripheral edge, said central portion continuing from its
peripheral edge with a generally U-shaped annular portion
comprising a downwardly extending inner wall at the peripheral edge
of said central portion, a first bend formed between said
peripheral edge and said inner wall, a curved bend an upwardly
extending outer wall spaced from the inner wall, with the upwardly
extending outer wall continuing outwardly in a curved bend and
sloping downwardly to form a downwardly inclined annular wall and
with the outer edge of said bottom being secured to the body of the
container and spacing said U-shaped annular portion inwardly of the
body of the container, said last mentioned curved bend forming a
second bend between said upwardly extending outer wall and said
downwardly inclined annular wall, said second bend being on a
horizontal plane above said first bend.
2. A structure as set forth in claim 1 in which when the container
is filled with contents and the lid is placed thereon for sealing
said container, the pressure inside the can is equalized and the
convexo-concave central portion assumes a concave
configuration.
3. A structure as set forth in claim 2 in which when the can
strikes an object the shock will be absorbed by the bottom of the
can so that the annular inner wall of the U-shaped annular portion
is caused to incline downwardly from the outer wall and form with
said central concave bottom a continuing downwardly inclined
wall.
4. A structure as set forth in claim 1 in which the second bend of
the bottom seats on a raised portion of the lid of a lower
positioned container so that the containers are vertically alined
and interlocked in a stacked relationship.
5. A structure as set forth in claim 1 in which the inner wall of
the U-shaped portion is shorter than the height of the outer wall
of said U-shaped portion, and in which said inner wall is at an
inclined outwardly sloping angle with said outer wall being
substantially vertical.
6. A structure as set forth in claim 1 in which the top of the
outer wall of the U-shaped portion is on substantially the same
horizontal plane as the center of said convexo-concave central
portion.
7. A structure as set forth in claim 1 in which the convexo-concave
bottom has a central annular recessed portion which is recessed
upwardly and is on substantially the same horizontal plane as the
top of the outer wall of the U-shaped portion.
Description
BRIEF SUMMARY OF THE INVENTION
An object of this invention is to provide a preformed bottom for a
container or can wherein the bottom has a convexo-concave central
portion spaced from the body of the container, with the portion
intermediate between the body and the central portion so
constructed as to form a generally U-shaped confirguration. When
the container is filled with contents and air is trapped in the
container when the lid is applied thereto, the central
convexo-concave portion will bulge downwardly to form a
concavo-convex dish-shaped configuration. The last mentioned
configuration will be further deformed when the container is
subjected to shock, such as when falling against a surface, and in
that instance the central concavoconvex bottom will bulge further
outwardly.
Another object of this invention is to provide a bottom for a
container or can which is shaped so that it can be stacked on the
top of an adjacent container and will be locked in stacked
position.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 is an elevational view of the bottom of the can forming this
invention and showing in dotted lines another can on which it is
stacked.
FIG. 2 is an enlarged cross-sectional view taken on line 2--2 of
FIG. 1, showing the bottom of the can in the position when the can
is empty.
FIG. 3 is a sectional view, similar to FIG. 2, but showing the
position of the bottom of the can when the can is filled with
contents such as paint or the like and the cover or lid has been
applied on the can.
FIG. 4 is a view similar to FIG. 3 when the can is filled, but
showing the bottom in the position when the can absorbs a shock,
such as when the can is dropped or when the side of the can strikes
against an object; and
FIG. 5 is a sectional view taken on line 5--5 of FIG. 1, showing
the stacking of two cans.
FIGS. 1 THROUGH 4
Referring first to FIGS. 1 to 4 inclusive, the can or container,
generally indicated at 10, is formed preferably of metal and
includes a circular body 12 and a bottom generally indicated at 14
which is likewise formed of metal and which is secured to the body
12 as at 16. The structure and configuration of the bottom in
relation to the body forms the subject matter of this application.
The top of the can is closed by a lid, to be subsequently
described.
The bottom 14 of the can is initially formed to the shape and
configuration shown in FIG. 2 and when secured to the body the
bottom, when the can is empty, will be shaped as shown in FIG. 2.
The bottom 14 is of circular shape and comprises a main central
annular convexo-concave or inverted dish-shaped portion 17 which
continues at its peripheral edge 18 with a short annular downwardly
outwardly inclined wall 19 which continues to form a curved bend 20
which is defined as the lower bend and which then continues
upwardly to form a spaced short vertical wall 22 which then curves
as at 23 and is defined as the upper bend, and then continues
downwardly as at 24 at an inclined plane and then continues
vertically downward as at 26 and then curves around as at 27 and
continues upwardly as at 28 and then curves around inwardly as at
29 and continues vertically downward as at 30 and curves around and
extends upwardly as at 32 so that the bottom of the body 12 of the
can which has its bottom edge turned upwardly as at 34 and then
downwardly and inwardly as at 36 is interlocked with the bottom 14
of the can. Thus, the bottom of the can is permanently secured to
the body 12. The central annular portion 17b of the main central
dish-shaped portion 17 is further upwardly recessed, as best shown
in FIG. 2, and the recessed portion is upwardly of the dish-shaped
portion 17.
The bottom 14 of the can therefore comprises a generally
convexo-concave central annular portion 17 with the peripheral
portion of a generally U-shaped annular configuration, generally
designated by the numeral 25, formed by the walls 19, 22 and bend
20, with the top of the wall 22 bending outwardly and continuing to
form an annular downwardly sloping surface 24 between the body of
the can and the central convex-concavo portion 17 of the bottom 14.
As can be seen, the upper and lower bends 23 and 20 are on
different horizontal planes.
When the can is filled with paint or other material and the lid is
placed over the top of the can to cover the can opening, a certain
amount of air will be trapped at the top and compressed and this
added to the weight of the material in the can will cause the
bottom of the can, particularly the central convexo-concave portion
17 to bulge downwardly and assume the position shown in FIG. 3,
wherein the convexo-concave portion 17 assumes a concavo-convex
shape, indicated at 17', as shown in FIG. 3. The central annular
recessed portion 17b still remains generally recessed, as shown in
FIG. 3. The reshaping or deformation of the central portion 17 of
the can thus equalizes the pressure inside the can. In effect, the
reshaping and the deformation of the central portion serves in the
nature of a spring or resilient member against which pressure is
applied. It should be noted that when the central concavo-convex
portion 17' of the can assumes the shape shown in FIG. 3, the
lowermost portion thereof is still within the horizontal plane of
the bottom of the can and the recessed portion 17b is inwardly and
upwardly of the bottom horizontal plane. Thus, when the filled cans
are stacked, the recessed portion 17b would not contact the lid of
the can positioned therebelow.
The peripheral annular U-shaped portion surrounding the central
concavo-convex portion 17 of the bottom serves to perform a
necessary function, particularly when the can is subjected to
shock, as when the body of the can strikes another object or falls
on either its side or bottom when being handled. Under such a
condition the bottom of the can is further deformed and assumes the
shape shown in FIG. 4, in which the annular peripheral U-shaped
portion 25 tends to straighten out so that the bend 20 and the wall
19 form a downwardly inclined wall 38 which merges with the central
annular concave portion and the bottom portion of the thus reshaped
bottom will extend below the horizontal plane of the bottom of the
can body. After the shock has been absorbed by the can the bottom
of the can will return to the shape shown in FIG. 3. It is only
when the can is subjected to a shock that the configuration of the
bottom assumes the shape shown in FIG. 4.
The bottom of the can also has the additional advantage in that the
can can be stacked in a locked position with respect to other cans
having a top and a lid, as shown in FIG. 5. The lower can generally
indicated at 40 has a rim generally indicated at 42 and a lid or
cover generally indicated at 44 applied thereto and same forms the
subject matter of a copending application which matured into U.S.
Pat. No. 3,799,388 issued Mar. 26, 1974 and will be briefly
described.
The rim 42 is of circular shape and is formed to comprise an inner
vertical wall 46 which terminates at its lower end in an inner
rolled bead 47. The upper portion of the vertical wall 46 of the
rim is curved or arcuate-shaped to form a rolled top surface 48
which continues downwardly, with the outer spaced vertical wall 49
angled or inclined outwardly at the bottom as at 50 and which
continues laterally with a horizontal bottom section 52 which
continues vertically upwardly to form a spaced vertical wall 53
which then continues outwardly to form a rolled top surface 54 to
receive therewithin the rolled upper edge 56 of the body 58 of the
container 40.
The lid 44 is of circular shape and comprises a main central
concave or dish-shaped portion 60 which continues upwardly to an
annular peripheral edge 62 and then continues with an annular
downwardly sloping short peripheral wall portion 63, the bottom of
which is rounded as at 64, and then continues upwardly to form a
vertical wall 66 which is rounded and slopes upwardly and outwardly
at the top as at 67 and then continues in a downward outer vertical
wall 68 and terminates in a curled edge 69. The walls 66, 68 and
top 67 form an inverted U-shaped configuration on the lid which
seats on and engages the inverted U-shaped portion of the rim and
secures the lid to the rim of the container in a positive manner,
all as more specifically described in my copending application.
The bottom 14 of the upper can, which forms this invention, is
adapted to be stacked on that type of rim and lid, as more clearly
shown in FIG. 5. In this stacking position the curved portion 23 of
the bottom of the can is positioned to rest on the rolled over
portion 67 of the lid and the short vertical wall 22 of the bottom
is positioned adjacent the vertical wall 66 of the lid. The
downwarly sloping annular portion 24 of the bottom extends into and
across the spaced opening between the vertical wall 68 of the lid
and the vertical wall 53 of the rim. The central concavo-convex
portion 17' of the bottom extends over the concavo-convex portion
60 of the lid 44 and would be positioned in a spaced relation from
the top of the lid, as best seen in FIG. 5.
* * * * *