U.S. patent number 3,871,543 [Application Number 05/429,784] was granted by the patent office on 1975-03-18 for double-wall jar.
This patent grant is currently assigned to Federal Package Corporation. Invention is credited to Robert Chadfield, Frank J. Lang.
United States Patent |
3,871,543 |
Chadfield , et al. |
March 18, 1975 |
Double-wall jar
Abstract
A jar, generally made of light weight material such as
polypropylene or medium impact styrene, and designed particularly
for vending cosmetic materials such as facial cream, which jar is a
two-part container (exclusive of cover), each part having a
relatively thin wall, designed, when assembled, to provide an
air-space between the walls of the two parts, but particularly with
the interlocking and interconnecting portions of said parts
concentrated in an upper zone near the rims of wall parts and
adjacent the threaded portion holding the cover, so that all forces
of anti-rotation and anti-part-separation are located in the same
area adjacent the threaded portion.
Inventors: |
Chadfield; Robert (Forest
Hills, Minnetonka, MN), Lang; Frank J. (Lemont, IL) |
Assignee: |
Federal Package Corporation
(Minneapolis, MN)
|
Family
ID: |
23704740 |
Appl.
No.: |
05/429,784 |
Filed: |
January 2, 1974 |
Current U.S.
Class: |
215/12.1 |
Current CPC
Class: |
B65D
11/16 (20130101); A45D 40/0068 (20130101); A45D
2200/152 (20130101) |
Current International
Class: |
A45D
40/00 (20060101); A47j 041/00 (); B65d
011/16 () |
Field of
Search: |
;215/12R,13R |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Rose; Herbert F.
Attorney, Agent or Firm: Bouda; Francis J.
Claims
Having thus described my invention, what I claim as new and desire
to protect by Letters Patent are the following:
1. A double wall jar comprising an inner cup nested within an outer
cup, the inner cup having an annular shoulder at the upper end
providing an abutment for the upper edge of the outer cup, the
outer surface of the inner cup being spaced from the inner surface
of the outer cup except at the upper ends of the wall of each cup,
a plurality of axially aligned teeth at the upper edge of inner
wall of the outer cup and a plurality of axially aligned teeth
below the shoulder at upper end of the outer wall of the inner cup,
said teeth being in interlocking engagement to prevent relative
rotary motion between the two cups, a peripheral inwardly-extending
groove in the outer wall of the inner cup directly adjacent the
said teeth and a peripheral inwardly-extending rib on the inner
wall of the outer cup directly adjacent the said teeth, said rib
being snap-fitted into the said groove upon assembly of the two
cups and preventing axial displacement between the said cups.
2. The double wall jar of claim 1, including a threaded portion on
said inner cup adjacent said shoulder, groove and teeth.
3. The double wall jar of claim 2, including a cap fitted on said
threaded portion.
4. The double wall jar of claim 1, wherein said inner cup is made
of polypropylene.
5. The double wall jar of claim 1, wherein said outer cup is made
of medium impact styrene.
6. The double wall jar of claim 1, wherein said inner cup is made
of polypropylene and said outer cup is made of medium impact
styrene.
7. The double wall jar of claim 1 wherein said teeth on said outer
cap define a full circle around the top of said cup.
8. The double wall jar of claim 1 wherein said teeth on said outer
cup define a full circle around the inner surface of said cup.
9. The double wall jar of claim 2 wherein the said teeth on said
inner cup define a full circle around the periphery of said cup
adjacent the said threaded portion.
10. The double wall jar of claim 2 wherein said teeth on said inner
cup define less than a full circle around the periphery of said cup
adjacent the said threaded portion.
11. The double wall jar of claim 1, wherein said outer cup is made
of polypropylene.
12. The double wall jar of claim 1, wherein said inner cup is made
of medium impact styrene.
13. The double wall jar of claim 1, wherein said inner and outer
cups are both made of polypropylene.
14. The double wall jar of claim 1, wherein said inner and outer
cups are both made of medium impact styrene.
Description
BACKGROUND OF THE INVENTION
Cosmetic jars are not new, and for many years were made of
milk-glass, not only for asthetic purposes, but also because of the
resistance to the chemical action of the cosmetics.
More recently such jars have been made out of plastic materials,
and even still more recently such jars have been developed in one
or more parts, not only to give the general feeling and physical
appearance of the milk-glass or opal-glass jars, but also to
provide an insulating inner space between the contents within the
jar and the outer wall of the jar.
Construction of such parts in the past has provided for
interlocking means so that the two portions of the container do not
rotate relative to each other and do not separate axially after
once being combined. In the past, such construction has been
complicated and, in many cases, ineffective because of the tendency
of the two parts of the double wall jar to separate when the cover
is applied or removed from the jar.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a double wall
jar, for cosmetics or the like, which is easily asssembled, which
is absolutely secure against separation of the two parts of the
jar, and which concentrates the interlocking portions of the
members in an upper portion of the side walls near the
cap-receiving threaded portion so that all forces which may tend to
separte the two parts of the jar are concentrated closely in the
area adjacent the interlocking portions.
DETAILED DESCRIPTION
For the purpose of illustrating the invention there are shown in
the accompanying drawings forms thereof which are at present
preferred, although it is to be understood that the various
instrumentalities of which the invention consists can be variously
arranged and organized, and that the invention is not limited to
the precise arrangements and organizations of the instrumentalities
as herein shown and described.
In the drawings, wherein like reference characters indicate like
parts;
FIG. 1 represents a fragmentary, cross-sectional view of the jar of
the present invention, with the two parts interlocked and with the
cap in position thereon.
FIG. 2 represents a fragmentary, cross-sectional view of the outer
part of the jar of the present invention, showing particularly the
toothed connecting portion at the upper portion of the inner wall
of said part.
FIG. 3 represents a fragmentary, cross-sectional view of the inner
part of the two-wall jar of the present invention, illustrating
particularly the toothed interconnecting members on the outer wall
near the upper edge and adjacent the threaded portion.
FIG. 4 represents a horizontal, cross-sectional view taken along
line 4--4 of FIG. 3.
FIG. 5 represents a greatly enlarged cross-sectional view of the
interconnecting portions of the upper edges of the said parts of
the two-wall jar of the present invention, taken in the area
generally illustrated at 5 in FIG. 1.
In the illustration of FIG. 1, the two-wall jar 10 is shown in
assembled position with the cover or cap 11 in place thereon. The
jar 10 consists of the outer portion 12 and the inner portion 13.
The inner member is constructed, preferably, of polypropylene
because of its inert characteristics to the components of cosmetic
substances, whereas the outer member is constructed preferably of
medium impact styrene because it affords a wider range of moulding
characteristics and an opportunity to decorate the external surface
of the outer member during the moulding operation. Needless to say,
the outer member may be polypropylene and the inner styrene, or
both may be of the same material, and of course, the material of
either member may be other than styrene or polypropylene. The
utilization of polypropylene and medium impact styrene provide not
only strength and shock resistance but also flexibility for the
snap-interconnection of the two parts, as hereinafter
described.
As is evident in FIG. 1, the dimensions of the inner and outer
members are such that a hollow air chamber is created between the
two members, not only providing for better aesthetic arrangement of
the two members, and of the total jar, but also providing an
insulating air space between the two walls of the two portions, if
such is desirable.
At the upper edge 15 of the inner member 13, there is a threaded
rib 16 constructed and arranged to receive the internally threaded
portion of the cap 11. The shoulder 17 provides an abutment, at its
underside 18, against which the top lip or edge 19 of the inner
member 12 can stop when in interlocking relationship, as shown in
FIGS. 1 and 5.
Directly beneath the shoulder 17 on the member 13 are disposed one
or more sections of toothed or notched portions 20, which may be in
the shape of quadrants of gears. These quadrants or gears or
toothed portions are arranged with the teeth extending in an axial
direction, and preferably two of such quadrants are disposed
diametrically opposite each other, as shown in FIG. 4, for better
ease of moulding or forming the serrations in the plastic body of
the member 13.
In close proximity to the teeth 20 is a rib 21 which extends
outwardly from the outer surface of the body portion of the member
13, which provides an integrally moulded snapring for interlocking
engagement with the mating portion on the outer body member 12.
The outer body portion 12 has, adjacent its upper edge 19, a
circumferential ring of teeth 22 which are designed, constructed
and arranged to mate with the teeth 20 on the other body portion,
as shown particularly in FIGS. 1 and 5. Directly adjacent the teeth
22 a circumferential rib 23 is moulded into the inner wall of the
outer member 12 and which projects radially inwardly from the inner
wall, as shown particularly in FIGS. 2 and 5. This rib 23 is
designed, constructed and arranged to mate with the groove 24
formed in the outer surface of the inner member 13, between the rib
21 and the teeth 20.
Because of the inherently flexible nature of the material from
which the cup-shaped members 12 and 13 are made, the ribs 21 and 23
and the groove 24 are nicely and appropriately dimensioned so that
the inner cup-member 13 will nest within the outer cup member 12,
with the teeth 20 in interlocking alignment with opposed teeth 22,
and with the rib 23, disposed between the rib 24 and the shoulder
17, extending into the groove 24, thus to interlock axially the two
cup members and to prevent axial displacement thereof.
While such members are held in axial alignment by the ribs, grooves
and shoulders as described above, the teeth 20 are in interlocking
disposition with the teeth 22, preventing relative rotary movement
between the two body members.
It can be clearly seen that with the teeth 20 and the teeth 22
directly beneath the shoulder 17, all the interlocking forces are
concentrated directly beneath and adjacent the threaded portion on
the inner jar member and the cap, and in the area where the forces
tending to separate the two body members (when the cap is screwed
on or off) are applied. Thus there is the maximum potential to hold
the two body members together and to prevent separation
thereof.
It is to be understood, however, that the present invention may be
embodied in other specific forms without departing from the spirit
or essential attributes thereof, and it is therefore desired that
the present embodiments be considered in all respects as
illustrative and therefore not restrictive, reference being made to
the appended Claims rather than to the foregoing description to
indicate the scope of the invention.
* * * * *