U.S. patent number 3,784,049 [Application Number 05/301,177] was granted by the patent office on 1974-01-08 for container with bag-liner locking rim.
This patent grant is currently assigned to Loma Corp.. Invention is credited to Bob R. Hawk.
United States Patent |
3,784,049 |
Hawk |
January 8, 1974 |
CONTAINER WITH BAG-LINER LOCKING RIM
Abstract
A container is provided with a locking rim for securing
flexible-bag liner in an open configuration in the container. The
upper rim of a container is formed with a plurality of locking ribs
angularly spaced around the rim. Each of the ribs is formed with a
socket of a configraution that interlocks with the flexible-bag
liner. Rolling of the upper periphery of the bag liner over the rim
and into the socket locks the liner to the container.
Inventors: |
Hawk; Bob R. (Crowley, TX) |
Assignee: |
Loma Corp. (Ft. Worth,
TX)
|
Family
ID: |
23162282 |
Appl.
No.: |
05/301,177 |
Filed: |
October 26, 1972 |
Current U.S.
Class: |
220/495.11;
248/95; 248/99; 248/100; 220/908.1 |
Current CPC
Class: |
B65D
25/16 (20130101); B65F 1/06 (20130101) |
Current International
Class: |
B65D
25/16 (20060101); B65D 25/14 (20060101); B65b
067/12 () |
Field of
Search: |
;206/57A
;220/63,65,17,55AN ;229/14BE ;248/95,99,100,101 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Dixson, Jr.; William T.
Assistant Examiner: Farrow; D. B.
Attorney, Agent or Firm: William V. Miller et al.
Claims
Having thus described this invention what is claimed is:
1. A container comprising
an upstanding peripheral wall defining an opening at the upper end
thereof and adapted to receive a flexible-bag liner, and
a plurality of locking ribs formed with said upstanding wall
adjacent the upper end thereof and in spaced relationship to each
other said ribs projecting laterally outward from the exterior
surface of said wall and having a socket formed in the lower
marginal edge portion thereof to receive a marginal edge portion of
the liner and maintain the liner in locked engagement with the
container.
2. A container according to claim 1 wherein said locking ribs are
of plate-form vertically disposed and said sockets are an aperture
formed a distance upwardly from the lower edge of each respective
rib with a slot extending between the aperture and lower edge
through which the peripheral edge portion of the liner is projected
into the aperture.
3. A container according to claim 2 wherein the lower edge of said
rib is arcuately curved from said slot into contiguous relationship
to the upwardly extending edge portions of said rib.
4. A container according to claim 2 wherein said slot is divergent
from its juncture with said aperture to facilitate entrance of the
liner into the said aperture.
5. A container according to claim 1 wherein said upstanding wall is
formed at the upper end with an inverted channel of U-shaped
cross-section having an outer leg projecting downwardly and
terminating a distance above said sockets.
6. A container according to claim 5 wherein the closed upper end of
the said channel is arcuately curved.
7. A container according to claim 5 wherein said outer leg is
formed with the outer surface thereof contiguous with the outer
edge of said ribs.
Description
BACKGROUND OF THE INVENTION
Containers heretofore provided, as for trash receptacles, are often
utilized for storing waste materials that may be liquid or
semipaste. To avoid cleaning and washing of the container, as may
become necessary for maintenance of proper sanitary conditions,
disposable liners have been devised for insertion in the container.
The liner is thus disposed of along with the waste material leaving
the container clean and sanitary.
A problem encountered with the prior art container and liners is
that the liners have a marked tendency to collapse and fall within
the container. Polyethylene or poly vinyl materials are often
utilized in fabricating these liners and the material, for reasons
of commercial economics, is of relatively thin sheet form without
appreciable structural rigidity as would provide a degree of
self-support. Consequently, the liners which have been merely
positioned in the container, readily collapse within the container
thereby detracting from their usefulness.
SUMMARY OF THE INVENTION
In accordance with this invention, a container is provided having
an upper rim structure that cooperatively interlocks with the upper
peripheral edge portion of a liner to properly maintain the liner
in an open configuration. For accomplishment of this objective, the
container rim is formed with a plurality of ribs having a socket
into which the edge portion of a liner may be readily rolled or
gathered and cooperate therewith in locking the liner in the
desired open configuration. In addition to locking of the liner in
an open position relative to the container, the liner will be fully
expanded to lie in close conformity with the container wall at its
upper end thereby providing the maximum opening for the particular
container.
These and other objects and advantages of this invention will be
readily apparent from the following detailed description of an
embodiment thereof and the accompanying drawings.
DESCRIPTION OF THE DRAWING FIGURES
FIG. 1 is a top plan view of a container embodying this
invention.
FIG. 2 is a vertical sectional view taken along line 2--2 of FIG.
1.
FIG. 3 is a fragmentary vertical sectional view on an enlarged
scale taken along line 3--3 of FIG. 2.
DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENT
A container 10 is shown in FIGS. 1 and 2 fabricated in accordance
with this invention. The illustrative container, generally
cylindrical, configuration having an upstanding peripheral wall 11
that is outwardly divergent toward the open upper end and has a
closed bottom wall 12. A thermoplastic material may be utilized for
fabrication of the container, as indicated in the illustrated
embodiment, in a molding operation. Although the illustrative
container is cylindrical, it is to be understood that a container
of different configuration, such as one having a square or
rectangular cross-section, may be faricated to embody this
invention. Also, materials other than thermoplastic may be utilized
in fabrication of a container.
A peripheral rim 13 is formed around the upper end of the wall 11.
This rim 13 is an inverted channel of U-shaped cross-section having
a leg 14 projecting downwardly in outwardly spaced relationship to
the wall 11. Preferably, the closed upper end 15 of the channel is
arcuately curved, as best seen in the enlarged fragmentary
sectional view of FIG. 3, to form a smoothly rounded surface.
Integrally formed with the rim 13 and the upper marginal edge
portion of the wall 11 are a plurality of locking ribs 16. Four
such ribs 16 are incorporated in the container with these ribs
being angularly spaced around the rim 13 as shown in FIG. 1. Each
of the ribs 16 is of plate-form disposed in a generally vertical
plane. Also, the ribs have a lower marginal end portion disposed
below the bottom edge 17 of the rim leg 14 and extend upwardly into
the channel of the rim 13 thereby enhancing the structural rigidity
of the container 10.
Formed in the lower end portion of each rib 16 is a socket 18
adapted to receive a marginal edge portion of a flexible-bag liner
L to maintain the liner locked engagement with the container 10.
The socket 18 comprises a circular aperture 19 and a slot 20
extending between the aperture and the lower edge 21 of the rib.
One side of the slot 20 smoothly merges into the lower edge 21 of
the rib defining in cooperation therewith an arcuately curved
surface. The opposite side 22 of the slot is relatively divergent
resulting in a funnel shaped slot facilitating feeding of the
marginal edge portion of the liner L into the aperture 19. An outer
vertical edge surface 23 of the lower end portion of the rib 16 is
formed contiguous with the arcuately curved surface of the edge 21
and the external surface of the rim leg 14.
Operational function of the rim 13 in locking a liner L to the
container is illustrated in FIG. 3. As previously stated, the liner
L adapted for utilization with containers of this type comprises a
thin-walled, relatively flexible bag which is open topped. The
liner L is first preliminarily positioned within the wall 11 of the
container 10 in such a manner that a marginal edge portion E at the
upper end may be loosely draped or folded over the rim 13. However,
in utilization of the novel structure of this invention, this
marginal edge portion E is pulled downwardly over the rim 13 and
turned under the ribs 16. At each of the ribs 16, the marginal edge
portion of the liner is trained into the socket 18 through slot 20.
Upon passing into the aperture 19, the immediately adjacent
portions of the liner are rolled as illustrated in FIG. 3.
With the liner's marginal edge portion E thus rolled into each of
the apertures 19, the liner L is secured in locked engagement with
the container 10. In this configuration of the liner, mere
application of weight to the liner interiorly of the container will
not be sufficient to unroll the marginal edge portion of the liner
from the sockets. Release of the liner is thereby prevented and the
liner will be locked in the desired open-topped configuration with
respect to the container. The arcuately curved edge 21 of each rib
16 prevents tearing of the liner L as weight is applied to the
liner.
It will be readily apparent from the foregoing description of an
illustrative embodiment of this invention that a container is
provided with novel locking means for securing of a disposable
liner in proper relationship to the container. Formation of a rim
at the upper periphery of the container, and which rim is provided
with the locking ribs, enables a liner to be maintained in locked
engagement with the container.
* * * * *