U.S. patent number 3,575,287 [Application Number 04/843,132] was granted by the patent office on 1971-04-20 for packaging container for meat products and the like.
This patent grant is currently assigned to Niagara Frontier Services, Inc.. Invention is credited to Oscar W. Graveley.
United States Patent |
3,575,287 |
Graveley |
April 20, 1971 |
**Please see images for:
( Certificate of Correction ) ** |
PACKAGING CONTAINER FOR MEAT PRODUCTS AND THE LIKE
Abstract
A packaging container including a tray having a transparent
bottom and an upstanding rim. A channel in the rim is open to the
bottom, and moisture-absorbing material in the channel is exposed
at the juncture between the bottom wall and rim to absorb
juices.
Inventors: |
Graveley; Oscar W. (Sanborn,
NY) |
Assignee: |
Niagara Frontier Services,
Inc., (Buffalo, NY)
|
Family
ID: |
25289145 |
Appl.
No.: |
04/843,132 |
Filed: |
July 18, 1969 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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751420 |
Aug 9, 1968 |
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Current U.S.
Class: |
206/204; 220/602;
229/407; 426/124; 426/129 |
Current CPC
Class: |
B65D
1/34 (20130101); B65D 81/264 (20130101); B65D
11/10 (20130101) |
Current International
Class: |
B65D
81/26 (20060101); B65D 1/34 (20060101); B65d
065/16 () |
Field of
Search: |
;206/45.33,45.31
;229/2.5 ;99/174 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Leclair; Joseph R.
Assistant Examiner: Caskie; John M.
Parent Case Text
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of my pending
application Ser. No. 751,420 entitled "Packaging Tray For Meat
Products and the Like" filed Aug. 9, 1968, and now abandoned.
Claims
I claim:
1. A packaging container for meat products and the life comprising
a tray having a transparent bottom portion and an upstanding rim
portion, and moisture-absorbing material in said tray exposed to
and encircling a major portion of said tray bottom.
2. The packaging container as defined in claim 1 wherein said tray
is formed from a transparent plastic material.
3. The packaging container as defined in claim 1 wherein said
moisture-absorbing material is of cellulose origin.
4. The packaging container as defined in claim 1 together with an
overwrap of transparent sheet material enclosing said tray and any
product therein to comprise a complete package.
5. The packaging container as defined in claim 1 wherein said tray
rim portion is provided with a channel therein communicating with
said tray bottom and wherein said moisture-absorbing material is in
said channel.
6. The packaging container as defined in claim 5 wherein said tray
is formed from polystyrene material.
7. The packaging container as defined in claim 5 wherein the edge
of said moisture-absorbing material exposed to said tray bottom is
closely adjacent the juncture between said bottom and said rim.
8. The packaging container as defined in claim 5 wherein said tray
comprises a one-piece construction formed from a sheet of
transparent plastic material extending horizontally to define said
bottom portion, upwardly to define an outer surface of said rim,
inwardly to define a top surface of said rim and downwardly toward
said tray bottom in spaced relation to the outer surface of said
rim to define an inner surface of said rim.
9. The packaging container as defined in claim 5 wherein said tray
comprises a two-piece construction formed from a first sheet of
transparent plastic material extending horizontally to define said
bottom portion and upwardly to define an outer surface of said rim,
and a second piece of rigid material joined to said first piece
extending inwardly to define a top surface of said rim and
downwardly toward said tray bottom in spaced relation to the outer
surface of said rim to define an inner surface of said rim.
10. The packaging container of claim 9, wherein said pieces of
material overlap to define a laminated external flange encircling
said tray adjacent the top surface of said rim.
Description
BACKGROUND OF THE INVENTION
This invention relates generally to the packaging art, and more
specifically to a new and useful packaging tray for meat products
and the like.
Meat products often are packaged in a tray overwrapped with a
transparent material. Such trays customarily are made of pulpwood
or the like, with the disadvantage that the customer can see only
the upper portion of the meat product.
The trend today is to package foodstuffs in a manner permitting the
customer to see the undersurface as well as the upper surface of
the packaged product, and various states have enacted legislation
mandating such "see-through" packaging.
Meat-packaging trays of a transparent plastic material are known.
However, they have the disadvantage that the plastic material will
not absorb moisture. As a result, juices from the meat simply
collect in a pool in the tray, with the danger of spillage during
handling. In addition to possible customer discomfort, bacteria
growth is facilitated when meat sits in such pooled juices
frequently producing an unsightly and unappetizing appearance.
Meat-packaging trays must be self-supporting in use, and any
construction which employs both transparent and moisture-absorbing
materials must satisfy the somewhat conflicting requirements of
structural rigidity and moisture absorption. Indeed, such
economically desirable materials as pulpwood while having
satisfactory moisture-absorbing qualities lose strength and
rigidity as they are wetted.
SUMMARY OF THE INVENTION
A primary object of this invention is to provide a meat-packaging
tray of substantial transparency, sufficient to comply with
existing and contemplated legislation and to provide the desired
"see-through" characteristic, in a construction having structural
rigidity and moisture-absorbing capability sufficient to avoid the
above-stated problems.
To this end, I provide a tray of rigid material having a
transparent bottom and an upstanding rim. Moisture-absorbing
material, such as pulpboard, is included in the rim and is exposed
to the bottom. The meat is placed in the tray on the transparent
bottom portion, and the moisture-absorbing material serves to draw
moisture away from the meat. The moisture-absorbing material need
have no structural strength, even when dry, because the rigid
material itself renders the tray self-supporting.
The foregoing and other objects, advantages and characterizing
features of my invention will become clearly apparent from the
ensuing detailed description of an illustrative embodiment
thereof.
DESCRIPTION OF THE DRAWING FIGURES
FIG. 1 is a perspective view of a meat-packaging tray of my
invention, in inverted position;
FIG. 2 is an enlarged sectional view thereof, taken about on line
2-2 of FIG. 1 but shown in its normal, upright position;
FIG. 3 is a further enlarged, fragmentary sectional view thereof,
showing the same incorporated in a complete package; and
FIG. 4 is a fragmentary sectional view of an alternative
construction of the rim portion of the tray provided by this
invention.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS
Referring now to the illustrative embodiment depicted in the
accompanying drawing, there is shown a packaging container of my
invention generally designated 1 and comprising a tray of rigid
material having a transparent bottom portion 2 and an upstanding
rim portion 3 around the periphery thereof. While a two-part tray
could be used, with only the bottom 2 being transparent, I
preferably form the entire tray as a one-piece member of material
having sufficient structural rigidity and transparency. Polystyrene
is such a material, although other suitable plastics can be
employed. In addition, the material of course must be inert to the
packaged product under normal conditions of use.
As distinguished from a conventional pulpboard tray which has an
opaque bottom extending completely thereacross, permitting the
customer to see only the exposed upper portion of the packaged
product, it is a particular feature of my invention that tray
bottom 2 is transparent thus allowing the customer to see the other
side as well. Indeed, the entire bottom is transparent and thus
affords a greater inspection area than trays of comparable size
having only a window opening in the bottom portion.
In addition, the tray of my invention, unlike a conventional
plastic tray, functions to absorb moisture. In particular,
moisture-absorbing material is included in the tray and is exposed
to the bottom portion thereof. A preferred arrangement is shown in
the drawing wherein rim 3 includes a first surface 4 which extends
upwardly from bottom portion 2 and preferably is inclined at less
than a right angle with respect to the plane of bottom portion 2.
Rim 3 includes a second surface 5 extending inwardly from surface 4
and disposed in a plane generally parallel with respect to that of
tray bottom 2. Finally, rim 3 includes a third surface 6 which
extends downwardly from surface 5 toward bottom portion 2 in a
direction generally parallel to and spaced from surface 4. Surface
6 terminates short of bottom 2 in proximity to the juncture between
tray bottom 2 and rim 3. By virtue of this preferred configuration
a channel 7 of inverted, generally U-shape is provided in rim 3 and
communicates with the juncture between tray bottom 2 and rim 3.
In accordance with this invention, channel 7 is filled with
moisture-absorbing material 8, which is of cellulose origin. One
desirable material is pulpboard because of its ready availability
and low cost, but others, for example ordinary blotting paper, can
be employed. For maximum absorption capacity channel 7 preferably
is completely filled with moisture-absorbing material, although
this will not always be necessary. In either case, the filler 8
terminates in a bottom, inner marginal edge portion 9 which
encircles and is directly exposed to the inner surface of tray
bottom 2. Material 8 extends down to bottom 2, for contact with
moisture on the bottom, and preferably fills the gap between bottom
2 and the lower end of wall surface 6 for maximum surface exposure
to liquids on the tray bottom. This construction is of considerable
significance because juices emanating from the packaged meat
product will not simply accumulate on the tray bottom as they would
tend to do in a conventional plastic tray. Instead, the exposed
encircling marginal edge portion 9 of moisture-absorbing material 8
will absorb such moisture into the material 8 in channel 7 by
capillary action. The channel 7, filled with moisture-absorbing
material of high capability, provides a sufficient body of
moisture-absorbing material to handle all of the juices and other
liquids normally present in a package of this type. With tray
bottom 2 being flat, juices flow easily to the exposed edge portion
9 of moisture-absorbing material 8 and are removed thereby from
contact with the packaged product.
Thus, in the tray of my invention the moisture is absorbed, unlike
a conventional plastic tray. Furthermore, in my tray the moisture
is removed from the meat-containing portion of the tray by the
moisture-absorbing action of the surrounding material, as
distinguished from a conventional pulpboard tray where the moisture
absorption takes place in the area of the pulpboard which is in
contact with the meat product.
Moreover, in the tray of my invention the moisture-absorbing
material need have no structural strength. The material 8 is merely
a filler in the tray for the purpose of absorbing moisture. The
tray itself is formed from material having sufficient structural
strength to render it self-supporting in use. This is important
because a meat-packaging tray should be self-supporting in use, and
most moisture-absorbing materials, for example pulpboard, although
shape-sustaining when dry lose their strength when wetted. By
providing a tray of self-supporting material with a filler of
moisture-absorbing material, the tray will remain shape-sustaining
and sufficiently rigid even after the filler material has absorbed
a substantial amount of moisture.
In the preferred form as described, an encircling chamber is
provided in the rim of the tray which chamber is filled with
moisture-absorbent material. The chamber-defining channel
additionally reinforces and strengthens the tray. However,
alternative methods of providing the moisture-absorbing material in
the tray can be employed. For example, upstanding rim 3 could be
solid and a band of moisture-absorbing material then secured to and
around the rim inner surface. The edge of the band would encircle
and be exposed to the tray bottom. While the exposed marginal edge
of the moisture-absorbing material preferably is located at the
juncture between the tray bottom wall and rim, to enable one to see
through the entire bottom portion, the material alternatively could
extend inwardly along the bottom wall a short distance whereby the
exposed marginal edge of the material would define a well with the
tray bottom but still would encircle the meat placed in the tray
and would leave substantially the entire tray bottom
transparent.
In the illustrative construction of FIGS. 1--3, channel 7 is
defined by an integral rim portion 3 including surfaces 4--6. The
moisture-absorbing material can be inserted in channel 7 after rim
3 is molded into the illustrated configuration, or the transparent
plastic material could be molded over an element of the
moisture-absorbing material to define rim 3. FIG. 4 shows an
alternative construction of rim 3' which defines a similar channel
7'. Tray bottom 2' extends upwardly and outwardly in a surface 15
which terminates in a generally horizontal external flange 16. A
separate piece of plastic material defines the rest of rim 3' and
includes a horizontal flange 17 and a downwardly and inwardly
directed surface 18 which, like surface 6 (FIG. 2) is generally
parallel to surface 15 and terminates short of bottom 2' . Flanges
16 and 17 are secured together as by heat sealing, and channel 7'
thus defined is filled with moisture-absorbing material 8' .
Flanges 16,17 impart additional strength to the tray. While the
material of portions 17,18 usually will be the same as the material
of portions 2', 15 and 16, a different material bondable to flange
16 can be used if desired.
In use, a meat product 10 is positioned on tray bottom wall 2,2',
preferably in spaced relation to the exposed marginal edge portion
9 of moisture-absorbing material, 8,8'. Indeed, this orientation of
meat product 10 relative to edge 9 requires no conscious effort
with the preferred form as illustrated because edge 9 encircles the
entire bottom wall 2,2' adjacent to juncture with rim 3,3'.
Then, the tray and meat product 10 are overwrapped with transparent
plastic sheet material 11. The overwrap can extend completely
around the package, as indicated in FIG. 3 to completely enclose
the same, with its ends heat sealed or otherwise secured together
to provide a complete meat package.
Accordingly, it is seen that my invention fully accomplishes its
intended objects. There is provided a tray possessing both the
requisite strength and the desired moisture-absorbing capability,
while offering the "see-through" characteristics obtainable only
with a completely transparent bottom. Only the margin, adjacent the
juncture with the outer rim wall, is covered. By spacing the
product 10 from the tray rim, all sides of the product are exposed
to view. While only two embodiments thereof have been disclosed in
detail herein, it will be appreciated that this has been done by
way of illustration only. Also, it will be appreciated that the
tray of my invention is usable with foodstuffs other than meat.
Indeed, it can be used wherever there is a packaging problem
requiring the characteristics and capabilities of the tray of this
invention.
* * * * *