U.S. patent number 3,927,790 [Application Number 05/542,241] was granted by the patent office on 1975-12-23 for molded container.
This patent grant is currently assigned to Container Corporation of America. Invention is credited to Edward J. Chase, William R. Topper.
United States Patent |
3,927,790 |
Chase , et al. |
December 23, 1975 |
Molded container
Abstract
A molded container has a tubular body closed at its ends by
closures integrally formed therewith. The upper closure has
openings for filling and emptying the container. The wall of the
container has a central portion formed with indentations and a pair
of frusto-conically shaped end portions which diverge axially
outwardly from the closure toward the central portion. A shoulder
is formed between the indentations and the end portion of the wall
to facilitate lifting of the container.
Inventors: |
Chase; Edward J. (Newark,
DE), Topper; William R. (Newark, DE) |
Assignee: |
Container Corporation of
America (Chicago, IL)
|
Family
ID: |
24162935 |
Appl.
No.: |
05/542,241 |
Filed: |
January 20, 1975 |
Current U.S.
Class: |
220/601; 220/649;
220/DIG.1; 220/661; 220/675 |
Current CPC
Class: |
B65D
1/14 (20130101); Y10S 220/01 (20130101) |
Current International
Class: |
B65D
1/14 (20060101); B65D 1/00 (20060101); B65D
007/42 () |
Field of
Search: |
;220/72,5R,94A,DIG.13,1R,DIG.1,DIG.12 ;D9/170,216,218
;214/1.5R,95R |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Price; William
Assistant Examiner: Pollard; Steven M.
Attorney, Agent or Firm: Carpenter, Ostis & Lindberg
Claims
We claim:
1. A unitary molded container comprising:
a. a tubular body having a continuous wall closed at its top and
bottom ends by respective top and bottom closure members integrally
formed with said wall;
b. said wall having a central portion and a pair of frustoconically
shaped end portions diverging axially outwardly from said closure
members toward said central portion;
c. a pair of apertures in said top closure member to facilitate
filling and emptying said container;
d. said wall having at least a pair of substantially flat
indentations in said central portion forming shoulders with each of
said end portions to facilitate lifting said container;
e. said indentations of a pair being disposed in the planes
separated by 180.degree. from each other and paralleling the major
axis of said container.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a molded container, and more
particularly, to a unitary molded container having improved lifting
and rolling features.
2. The Prior Art
Heretofore, molded containers had been made with cylindrical walls
and were not susceptible to easy lifting by engagement of the wall.
Rather, containers had to be lifted by engagement of their bottoms
with blades of a lift truck or the like. The rolling resistance of
such containers was also very substantial since practically the
entire wall made contact with the surface on which the container
was being rolled, thus making the rolling quite difficult.
SUMMARY OF THE INVENTION
The present invention overcomes the disadvantages of the prior art
and provides a novel container which has a wall integrally formed
with top and bottom closures. The wall has a central portion formed
with one or more indentations and frusto-conical end portions. The
end portions diverge axially outwardly from the closures toward
central portion of the wall and form a shoulder with the
indentation to facilitate engagement thereof by a blade of a lift
truck, or the like, for lifting the container. The edge areas on
the end portions of the wall immediately adjacent the central
portion of the wall act as rolling hoops when the container is
rolled on its side diminishing the heretofore experienced rolling
resistance of containers known in the art.
THE DRAWING
FIG. 1 is a side elevational view of a container showing the
present invention;
FIG. 2 is a top plan view of a container shown in FIG. 1;
FIG. 3 is a schematic view showing the container of FIG. 1 being
lifted;
FIG. 4 is a schematic view showing the container in a tilted
position; and
FIG. 5 is a view showing the container positioned on its side.
Referring now to the drawing, more particularly to FIGS. 1 and 2,
there is shown a molded container, generally designated 10. The
container is a drum and may be formed from plastic or the like.
The container has a tubular body which includes a continuous wall
12 closed at its ends by respective end closure members, namely a
top end closure 14 and a bottom end closure 16. The end closures
are integrally formed with the wall and present a unitary
construction of a closed container.
The wall 12 has a central portion 18 and a pair of frusto-conically
shaped end portions 20 which diverge axially outwardly from the end
closures 14 and 16, respectively, toward the central portion
18.
The central portion 18 of the wall 12 has flattened indentations 22
each of which forms a shoulder 24 with the end portion 20 of the
wall 12. The indentations are spaced about the wall in such manner
that at least two of said indentations are disposed in planes
separated from each other by 180.degree. and paralleling the major,
or vertical, axis (not shown) of the container.
The indentations 22 and shoulders 24 provide convenient lifting
areas engageable by blades 55 of a fork lift truck, or the like, as
best seen in FIGS. 3 through 5.
Referring now to FIG. 3, there is shown the container 10 being
lifted from a platform or floor 51 by engagement of blades 55 of a
lift truck (not shown) or the like with the shoulder 24.
In FIG. 4, the indentations 22 are engaged by flat areas of the
blades 55, or the like, and the container is lifted and tilted at
the same time. The blades 55 exert a pressure against the
indentations 22 thereby maintaining the container firmly in their
grasp.
FIG. 5 shows the container positioned on its side after being
lifted and tilted as heretofore described. The container contacts
the platform or floor 51 by edge areas 26 on the circumference of
the end portions 20 of the wall 12, as shown. The container can be
rolled with relative ease since the edge areas 26 act as rolling
hoops and reduce rolling resistance of the container. Heretofore,
containers made without edge areas of the type described here, were
difficult to roll due to substantial rolling resistance presented
by contact of the substantially entire wall of the container with
the surface on which the container is being rolled. The edge areas
greatly diminish the area of contact between the container and the
floor, or the like, on which the container is rolled, thus reducing
the rolling friction.
Referring back to FIGS. 1 and 2, it will be seen that the top 14 of
the container is formed with a pair of apertures 28 and 30 for
filling and emptying the container. The apertures have threaded
upstanding flanges 32 and 34, resepctively, engageable by threaded
covers (not shown) for closing the same.
The top closure member 14 is formed with a plurality of upstanding
ridges 36 disposed in circumferentially spaced arrangement about
the periphery thereof and in close proximity to the edge of the
closure 14. The ridges provide protection for closures secured to
threaded apertures 28 and 30. The inside annular surface of the
ridge 36 provides a surface for a person or a hand truck to grasp
the container. The spaces between the ridges form water run-off
areas.
The bottom closure member 16 has a plurality of depressions 38
which are engageable by user's hand when manually handling the
container, emptying it, or using the same with drum slings or the
like.
* * * * *