U.S. patent number 3,556,339 [Application Number 04/783,515] was granted by the patent office on 1971-01-19 for plastic container and closure.
This patent grant is currently assigned to Aktiebolaget Cerbo. Invention is credited to Arnold R. Skylvik, Evald T.G. Lind.
United States Patent |
3,556,339 |
|
January 19, 1971 |
PLASTIC CONTAINER AND CLOSURE
Abstract
A plastic container having a bottom portion and a lid member for
closing the container inside the edges of the bottom portion
opening, the sidewalls of the bottom portion having an inwardly
facing groove along its periphery, the lower wall of the groove
facing an abutment surface and the bottom portion sidewalls
decreasing in thickness below its edges and the groove, the lid
member having a depending sidewall the lower end of which has an
outwardly projecting ridge extending around less than the entire
circumference thereof so as to present a no-ridge area, the lid
member ridge lying wholly within the groove when closing the
container, and the lid having a tongue member in the vicinity of
the no-ridge area for facilitating easy opening of the lid.
Inventors: |
Evald T.G. Lind (Trollhaettan,
SE), Arnold R. Skylvik (Trollhaettan, SE) |
Assignee: |
Aktiebolaget Cerbo
(Trollhaettan, SE)
|
Family
ID: |
20303354 |
Appl.
No.: |
04/783,515 |
Filed: |
December 13, 1968 |
Foreign Application Priority Data
|
|
|
|
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Dec 14, 1967 [SE] |
|
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17,193/67 |
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Current U.S.
Class: |
220/787;
220/788 |
Current CPC
Class: |
B65D
43/021 (20130101); B65D 2543/00842 (20130101); B65D
2543/00685 (20130101); B65D 2543/00546 (20130101); B65D
2543/00629 (20130101); B65D 2543/00759 (20130101); B65D
2543/0049 (20130101); B65D 2543/00796 (20130101); B65D
2543/00296 (20130101); B65D 2543/00194 (20130101) |
Current International
Class: |
B65D
43/02 (20060101); B65d 043/10 () |
Field of
Search: |
;220/60,97 ;150/.5
;215/41 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: George T. Hall
Attorney, Agent or Firm: Watson, Cole, Grindle &
Watson
Claims
1. A plastic container, having a bottom portion (1) adapted to form
a storage space and made of a relatively thin, preferably embossed,
flexible plastic material, and a lid member (2) adapted to be
inserted when closing the container, inside the edges (8) of the
bottom portion at the opening thereof, the sidewalls (3) of said
bottom portion at a slight distance from said opening having an
inwardly facing groove extending around the entire periphery of
said opening; the lower wall of said groove thereby forming an
abutment surface (5) for said lid member (2); said bottom portion
sidewalls gradually increasing in thickness from said edges toward
the top wall of said groove and extending substantially around the
entire opening; thereby to form one part of a snap lock arrangement
cooperating with said lid member, and wherein said lid member (2)
has a depending sidewall extending between said edges and said
abutment surface; the lower end of said lid member sidewall having
an outwardly projecting ridge (7) extending around less than the
entire circumference thereof so as to present a no-ridge area for
said lid member sidewall; said ridge comprising the other part of
the snap lock arrangement and being adapted to lie wholly within
said groove against said abutment when closing the container; said
lid also having a tongue member (9) thereon projecting outwardly
from the container for facilitating opening thereof, said tongue
member being located above said no-ridge area, whereby said snap
lock arrangement is not effected at said no-ridge area and easy
opening of said
2. A container according to claim 1, characterized in that said lid
(2) is provided with stiffening means extending about the entire
periphery of said lid; said stiffening means being U-shaped in
cross section with one
3. A container according to claim 1 wherein said bottom portion and
said lid member are shaped to form a substantially rectangular
container, said bottom portion sidewall being of uniform cross
section between said edges and said groove at each corner of said
bottom portion to additionally facilitate easy opening of said lid
member at each of its corners.
Description
The present invention is concerned with a plastic container having
a bottom portion adapted to form a storage space and made of a
relatively thin, preferably embossed, flexible plastic material,
and a lid member adapted to be inserted when closing the container,
inside the edges of bottom portion at the opening thereof, the
sidewalls of the bottom portion at said opening presenting a
step-forming increase of the internal dimensions of the bottom
portion, thereby forming an abutment surface for the lid member,
and also a slight increase in wall thickness between the lid
abutment surface and the top of said sidewalls, said increase in
wall thickness being directed towards the interior of the box and
extending around essentially the whole of the said opening, thereby
to form one part of a snap lock arrangement cooperating with the
lid member, and wherein the lid member presents on the outside of a
side edge portion, intended to abut the abutment surface of the
bottom portion, a ridge or similar raised portion which extends
essentially around the whole circumference of the lid and comprises
the other member of the snap lock arrangement.
In containers of the type aforedescribed, which may be used for
storing small spare parts or the like in car repair workshops etc.,
it is to advantage with respect to the purpose for which the
container is used that the actual container portion, i.e. the
bottom portion, is relatively flexible. Furthermore, from the
aspect of manufacture, it is also to advantage if the bottom
portion of the container can be given an essentially uniform
thickness, without a too complicated change in shape at the rim
portion thereof. At the same time, it is necessary that the
container with lid applied represents a highly stable unit, which
can withstand rough handling whilst being transported, and stored
without inadvertently opening. In addition to and in spite of this,
the container must be capable of being opened and closed easily,
and to withstand repeated opening and closing operations during a
long period of use, without relinquishing the ability to
effectively secure the lid. Containers known to the art do not
satisfy the above requirements and desiderata.
Consequently, the object of the present invention is to provide in
a container which presents a uniform material thickness of the
bottom portion thereof and the wall members of which are relatively
thin and flexible, but which presents considerable stability when
the lid is applied, a means by which the lid and bottom portion can
be connected together so that they cannot be separated
unintentionally but which nevertheless enables the lid to be
removed and replaced repeatedly without impairing the effective
sealing of the container.
This object is achieved by means of the invention, which is mainly
characterized in that the increase in wall thickness in the bottom
portion of the container and/or the ridge in the lid is omitted
within at least one peripheral section at which removal of the lid
from the container is commenced when opening said container.
An embodiment of the invention will now be described in detail with
reference to the accompanying drawing, in which
FIG. 1 is a perspective view of a container with lid applied;
FIG. 2 is a section II-II in FIG. 1 through an edge portion of the
bottom portion and lid of the container, and
FIG. 3 is a perspective view of the same container with the lid
removed.
The container consists of a bottom portion 1 and a lid 2, suitably
made of the same material, primarily a soft and flexible plastic
material. The material of the bottom portion is substantially of
uniform thickness and is relatively thin, which is an advantage
both with respect to the intended use of the container and to its
manufacture. The walls 3 of the bottom portion 1, however, present
at the rim portion of the container opening a somewhat thicker
portion 4, which forms a ridge projecting inwardly of the opening
to form one part of a snap lock by which the lid is held firmly in
position. Immediately below the wall portion 4 the walls present a
stepped portion which form an abutment surface 5 for the lid 2.
This prevents the lid from being pushed too far into the
container.
As is evident from the aforegoing, the lid 2 is intended to be
inserted into the opening of the container, to close the container.
The lid is essentially flat, but presents at its periphery a
stiffening member 6 which in cross section has the shape of an
inverted U. At the bottom edge surface of the outer limb member of
the U-shaped member 6 is a ridge or collar 7, adapted to comprise
the other part of the aforementioned snap lock. To facilitate the
insertion of the lid into the container opening the thicker portion
4 of the sidewalls 3 is so designed that the opening is largest at
the outer edge 8 of the walls 3 and narrowed downwardly, to be
widened at the bottom of portion 4 so that the collar 7 on the on
the lid rests in a groove formed between the portion 4 and the
abutment surface 5 when the lid is applied to the container, that
is when the container is closed. The lid is provided at one corner
with a tongue 9 which projects away from the bottom portion of the
container and forms a finger grip, to facilitate an opening of the
container.
In accordance with the invention the collar 7 on the lid is
excluded in the vicinity of the tongue 9, whereby when opening the
lid by means of the tongue 9 the lid offers practically no
resistance. The thicker wall portion 4 is also excluded at
corresponding positions, to afford space for the corners of the lid
when opening the container. In the container shown in FIG. 3 the
thicker wall portion 4 has been omitted at all four corners of the
bottom portion, to permit optional positioning of the lid and to
permit a lid to be used in which the collar free corner is
differently positioned. The tongue 9 indicates quite plainly where
the opening movement is started.
Thus, the lid can be removed quite easily by means of the tongue on
the lid 2, since there are no locking means at the position where
opening of the container commences. The resiliency necessary to
realize the function of the snap lock is provided for by the
U-shaped member 6 of the lid. The invention thus provides for a
relatively simple and inexpensive design of the bottom portion and
lid of the container, and ensures an effective sealing of the lid
when the container is closed without rendering the container
difficult to open.
It should be understood that the invention is not restricted to
that which has been illustrated and described in the aforegoing,
but can be varied within the scope of the following claims.
* * * * *