U.S. patent number 3,858,748 [Application Number 05/391,187] was granted by the patent office on 1975-01-07 for container and lid construction for indicating lid removal.
This patent grant is currently assigned to Illinois Tool Works Inc.. Invention is credited to Leslie Stephan Marco.
United States Patent |
3,858,748 |
Marco |
January 7, 1975 |
CONTAINER AND LID CONSTRUCTION FOR INDICATING LID REMOVAL
Abstract
A plastic container and cover assembly which is opened with
mutilation or severing of an outer top peripheral portion of the
container, and reclosed with the original cover for reuse; the
peripheral portion of the cover is of inverted U-shape providing an
inner flange for frictional or snap interlocking with the container
body wall and an outer dependent flange extending into an upwardly
open groove or trough on the container, the horizontal flange
portion of the cover overlying an outward radial rim portion on the
container which rim portion is peripherally weakened continuously
or at intervals to be severed therealong upon removal of the
container grooved portion and cover with discarding of the severed
grooved portion and permissive reuse of the cover to close the
container, and with the weakened portion severed along at least a
substantial portion thereof following any attempt to pry the cover
from the container grooved portion, thus indicating a mutilation of
that portion of the container as a tell-tale.
Inventors: |
Marco; Leslie Stephan (Des
Plaines, IL) |
Assignee: |
Illinois Tool Works Inc.
(Chicago, IL)
|
Family
ID: |
23545607 |
Appl.
No.: |
05/391,187 |
Filed: |
August 24, 1973 |
Current U.S.
Class: |
220/276; 215/45;
215/47 |
Current CPC
Class: |
B65D
43/022 (20130101); B65D 43/0218 (20130101); B65D
2543/00509 (20130101); B65D 2543/00546 (20130101); B65D
2543/00296 (20130101); B65D 2543/00092 (20130101); B65D
2401/10 (20200501); B65D 2543/00472 (20130101) |
Current International
Class: |
B65D
43/02 (20060101); B65d 017/00 (); B65d 043/02 ();
B65d 017/20 () |
Field of
Search: |
;220/27,6R,47,48,53,54
;215/32,42 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Price; William I.
Assistant Examiner: Moy; Joseph Man- Fu
Attorney, Agent or Firm: Beart; R. W. Benno; Edward L.
Claims
I claim:
1. A plastic container assembly comprising a body portion having an
open end defined by a generally vertical inner wall and an outer
depending generally vertical wall joined to the inner wall by a top
wall portion, and with the lower portion of the depending outer
wall terminating in an upwardly facing trough formation, and a
cover closing the open end of the body portion and having radially
spaced inner and outer walls interconnected by a top cover flange,
said inner walls of said container and said cover being formed to
cooperate in a manually releasable interlocking fit, said outer
depending wall of the cover projecting into the upwardly facing
trough formation, said outer depending wall of the cover and the
outer upwardly extending segment of said upwardly facing trough
formation being relatively formed to substantially prevent access
by a person's finger to the lower edge of said outer depending wall
of the cover, and means for weakening said top wall portion of the
body portion around the periphery thereof for complete severance
therealong upon authorized removal of the cover and trough
formation from the body portion and discarding of the trough
formation permitting the original cover to be used as a reclosure
for the body portion.
2. A container assembly as claimed in claim 1, wherein the top wall
portion of the body portion is provided with groove means extending
at least partially therethrough to provide the peripheral weakening
means.
3. A container assembly as claimed in claim 2, wherein the groove
means is interrupted at spaced intervals around the periphery
thereof.
4. A container assembly as claimed in claim 1, wherein the top wall
portion of the body portion is provided with groove means extending
completely therethrough at spaced intervals around the periphery
thereof.
5. A container assembly as claimed in claim 1, wherein the top wall
portion of the body portion is of sufficient radial extent to
radially space the inner and outer walls of the body portion and
provide an inverted U-shaped configuration fitting within the
inverted U-shaped configuration provided by the inner and outer
walls and the cover flange.
6. A container assembly as claimed in claim 5, wherein the top wall
portion of the body portion is provided with groove means extending
at least partially therethrough to provide the peripheral weakening
means.
7. A container assembly as claimed in claim 6, wherein the groove
means extends from the under face of the top wall portion of the
body portion.
8. A container assembly as claimed in claim 7, wherein there is
provided additional groove means extending from the upper face of
the top wall portion toward the groove means in the under face
thereof.
9. A container assembly as claimed in claim 1, wherein the inner
and outer walls of the body portion are radially spaced apart and
the top wall portion is provided with groove means extending from
the upper face thereof to provide the peripheral weakening
means.
10. A container assembly as claimed in claim 1, wherein there is
relatively loose interfitting between the outer cover wall and the
trough formation to facilitate separation.
Description
BACKGROUND OF THE INVENTION
There are various forms of sealed containers with severable sealing
means between the cover and a container body. In some of these
arrangements, there are sealed outward flanges on the cover and
body with weakening to permit removal of an outer strip so that the
cover can then be removed from the container and reapplied if
desired. In other arrangements, an outer portion is sealed to a
container body flange which is weakened to permit removal of the
body flange and the outer cover leaving an inner cover which may be
removed for access to the container contents and then reapplied if
desired. And, too, there are arrangements of reversely folded
flanges with one folded portion removable along a line of weakness
to permit removal of the cover and the remaining folded portion. In
most of these arrangements, the lines of weakness are external and
sometimes in view to facilitate opening of the container by the
purchaser.
SUMMARY OF THE INVENTION
According to the present invention, there is provided a plastic
reusable container and cover assembly which may be opened and
reclosed with the original cover intact.
An object of the invention is to provide such an assembly wherein
complete removal of the cover will effect separation of a
peripheral portion of the container from the body portion thereof,
thus preventing reclosure after such intentional tampering without
leaving a tell-tale omission of a portion of the container when
viewed with others on display.
Another object of the invention is to provide an assembly of the
above type wherein the separable portion of the container is joined
to the body portion by a line of weakness normally hidden from
view.
A further object of the invention is to provide such an assembly
with the outer cover flange projecting into an upwardly facing
groove formation on the separable portion of the container tending
to deter tampering by finger lifting of the cover from the
container and resulting in at least partial separation of the
portion of the separable body portion if a prying tool is inserted
into the groove formation in an effort to pry the cover from the
container.
The above and other objects of the invention will in part be
obvious and will be hereinafter more fully pointed out in
connection with the detail description of the drawing in which
FIG. 1 is a perspective view of the container and cover
assembly;
FIG. 2 is an enlarged sectional view taken along line 2--2 of FIG.
1 showing a line of weakness for separation of a peripheral portion
of the container from the body portion thereof;
FIG. 3 is a similar sectional view taken along line 3--3 of FIG. 1
illustrating permissive discontinuity of the lines of weakness
shown in FIG. 2;
FIG. 4 is a sectional view similar to FIG. 2 but showing the cover
partially removed from the container and the resultant separation
of a peripheral portion of the container from the body portion
along the line of weakness;
FIG. 5 is a sectional view similar to FIG. 2 but showing a modified
line of weakness;
FIG. 6 is a sectional view similar to FIG. 2 but showing a further
modified line of weakness.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
With reference to the accompanying drawings, and particularly FIGS.
1 and 2 at this time, the container 10 may take various shapes but
is illustrated as of somewhat bulbous cylindrical shape and is
preferably formed of thin wall plastic material, such as
polystyrene. The container is closed by a cover or lid 12 of
similar plastic material. The cover includes a vertical wall
portion 14 upstanding from the central closing portion thereof and
merging with a horizontal outwardly extending top wall portion 16.
This wall portion 16 terminates in a depending peripheral flange
18, thus providing an inverted generally U-shaped peripheral
portion. The invention contemplates that the lid 12 may have other
cross-sectional configurations but must include an inner wall 14,
an upper wall 16 and a depending skirt 18.
The container body includes an outwardly and upwardly inclined
peripheral wall 20 merging with an upstanding vertical wall portion
22 within which the telescoped cover wall portion 14 may have a
snug friction fit or an interfitting rib and groove or shoulder
arrangement between these cover and body walls for a snap fit, or
other conventional arrangements therebetween. If desired known
venting means may also be provided between the cover and container
body. The wall portion 22 merges with a horizontal outward flange
or rim portion 24 which underlies the top wall 16 of the cover when
applied to the container. The outer periphery of the wall or flange
24 joins with an outwardly and downwardly inclined wall 26a in turn
merging with a vertical portion 26b which combine with the wall
portions 24 and 22 to provide an inverted U-shape within the
U-shaped portion of the cover. At the bottom of the wall portion
26b, there is an outward radial wall 28 merging with an upstanding
peripheral flange 30 which define, with the wall portion 26b, an
upwardly facing groove or trough formation 32 into which the lower
portion of the cover flange 18 extends. This groove may be upwardly
open, as illustrated, or the flange 30 may be turned inwardly or
otherwise positioned closer to the outer surface of the cover
flange 18 when it is desired to prevent any accumulation of foreign
matter therein.
Normal operation of the container and cover assembly shown in FIGS.
1, 2 and 3 will be described with reference to FIG. 4. The
horizontal rim portion 24 of the cover is weakened by a groove, as
V-shaped, or cut-out 34 to provide a line of weakness at the apex
thereof so that the outer portion thereof, including the groove
formation 32, will be severed from the container upon removal of
the cover as will be described. This weakening can be accomplished
in various ways. The groove 34 may be circumferentially continuous
around the underside of the rim or it may be discontinuous for a
short distance, as at 36 in FIG. 3, and such discontinuity may be
at spaced intervals to leave a series of relatively weakened or
even slit sections alternating with non-weakened portions. The
weakening grooves themselves may be variously formed as by the
groove 38 in the upper face of the rim as shown in FIG. 5, or by
opposed grooves 40, 40a in opposite faces of the rim as shown in
FIG. 6. To open the container, the container groove forming walls
are lifted in the direction of the arrow in FIG. 4 and this will,
in turn, lift the cover 12 along with the remnant peripheral
grooved portion of the container which will be separated from the
remaining portion of the rim 24 along the line of weakness provided
at the apex of the groove 34, or the grooves 38, 40 and 40a, as the
case may be. Upon complete removal of the cover, the remnant
container rim portion, that is, the remaining wall portions 26a,
26b, 28, 30, can be discarded, and the original cover 12, without
alteration, can be used as a reclosure for the container body.
There are those who surreptitiously inspect the contents of
containers by tampering on the display shelf in a store and often
without intending to purchase. Tilting of the cover and container
groove formation for this look-see purpose will rupture the
weakened line as described above at least along a substantial
portion of the peripheral extend thereof. The primary locking fit
is between the contacting surfaces of the cover wall 14 and the
container wall portion 22 when the cover is closed, and that
locking fit should be such that substantial circumferential
fracture and possibly some radial fracture of the groove 34 will
occur before the locking fit is opened. Thus, when repositioning
the cover and the container groove formation walls from the
look-see tilted position, distortion and misalignment of the
remnant container rim portion to the cover 12 will be obvious.
* * * * *