US3756492A - High strength open bottom packaging tray - Google Patents

High strength open bottom packaging tray Download PDF

Info

Publication number
US3756492A
US3756492A US00256453A US3756492DA US3756492A US 3756492 A US3756492 A US 3756492A US 00256453 A US00256453 A US 00256453A US 3756492D A US3756492D A US 3756492DA US 3756492 A US3756492 A US 3756492A
Authority
US
United States
Prior art keywords
tray
ribs
side walls
accordance
food
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00256453A
Other languages
English (en)
Inventor
R Reifers
K Bixler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PACKAGINING Corp OF AMERICA A DE CORP
Packaging Corp of America
Original Assignee
Diamond International Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Diamond International Corp filed Critical Diamond International Corp
Application granted granted Critical
Publication of US3756492A publication Critical patent/US3756492A/en
Assigned to PACKAGINING CORPORATION OF AMERICA, A DE CORP. reassignment PACKAGINING CORPORATION OF AMERICA, A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DIAMOND INTERNATIONAL CORPORATION,
Assigned to PACKAGING CORPORATION OF AMERICA reassignment PACKAGING CORPORATION OF AMERICA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DIAMOND INTERNATIONAL CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/34—Trays or like shallow containers

Definitions

  • the tray bottom is formed of a plurality of upright U or V shaped ribs joining or intersecting in two directions and defining open windows therebetween, the height of each V shaped rib being on the order of several times the thickness of remainder of the tray, and the total volume of the inverted V shaped ribs being about equal to the volume of a bottom of a solid bottom tray of the same size.
  • the present invention relates to an open bottom food conatiner and, more particularly, to a food container primarily for use for the packaging of produce, and overwrapped with a transparent film, and where the bottom wall is replaced with a plurality of open windows defined by structural beams.
  • BACKGROUND Molded wood pulp food trays have served the food packaging industry well for many years for the packaging of food commodities.
  • Such trays have the advantage, besides low price and cost to the consumer, of being clean, sturdy and safe; of being biodegradable so as to minimize the solids pollution problem; of being capable of assimilating the liquid juices which exude from some food products; of being soft and relatively flexible so as to protect and prevent bruising of food products such as fresh fruit and tomatoes; and of being air and vapor permeable to maintain freshness and permit passage of liquid vapor.
  • Another defect of the clear plastic trays involves their transmission of light lengthwise through the tray walls to provide a light pipe or fiber optic effect which increases discoloration of some food products, such as hamburger and other meats.
  • the light has a negative effect on meat quality causing discoloration more quickly than meat which is maintained more in the dark but under otherwise similar conditions.
  • hamburger and other meat packaged in clear plastic has its botom exposed to light constantly even when the tray rests on an opaque object such as the bottom of the meat cooler or an underlying package or between two packages.
  • the Bixler construction provides maximum visibility with a relatively strong construction and is, in many respects, a successful approach to the problem, although under certain conditions there has been found to be a need to provide increased strengthening of the Bixler construction, particularly in the area where the V ribs meet the side walls of the tray where fault lines" may exist.
  • the present invention provides such an improved structure in a food packaging tray primarily intended for the packaging of produce, although it may be used for packaging of other food products such as meat, particularly hamburger.
  • the construction of the present invention utilizes high and strong ribs on the nature of the ribs in parent application Ser. No. 111,578, but they are upright rather than being inverted. It is found in accordance with the present invention that in order to provide the maximum strength desirable in all packaging situations, the upright V or V shaped ribs should be of substantial height to provide a thick platform or pallet upon which the food product is supported, and wherein the total volume of the ribs forming the platform is about equal to the volume of a bottom of a conventional tray of the same size, such as that shown in the Reifers U.S. Pat. No. 3,185,371.
  • Certain food products such as meat have increased shelf life as the oxygenation to the food product is improved.
  • the construction according to the present invention not only improves visibility of the product, but improves oxygen transmission to the food product packaged therein in conjunction with a plastic overwrap film.
  • the raised ribs provide an immediately available supply of trapped oxygen to the package.
  • transition zone between the side walls of the tray and such ribs of upright V crosssection.
  • This transition zone is such that no fault lines or notches are provided in the side or end wall and the transition zone, and this may be accomplished by providing a rounded transition zone from the end and side walls, which in turn merges into a peripheral gutter, such peripheral gutter forming the furthest point to which the upright V ribs extend. It is preferably accomplished by extending the side walls directly into the peripheral rib.
  • the characteristics of the package provided in accordance with the present invention are accomplished by the use of relatively high support beams, namely the upright U or V cross-section ribs of about 3/16 inch height or more, which are themselves strong, which are coupled to the side and end walls in a way that maintains high side walls beam strength, for highest total package strength.
  • relatively high support beams namely the upright U or V cross-section ribs of about 3/16 inch height or more, which are themselves strong, which are coupled to the side and end walls in a way that maintains high side walls beam strength, for highest total package strength.
  • the transition between the ribs and the inner periphery of the tray being relatively smooth and uninterrupted without notches, the strength provided is high and failure sites are reduced to a minimum.
  • rib forms which have been previously suggested in trays of uniform material thickness, such as plastic, that have the liability of an interrupted edge which provides a fault site.
  • the construction of the present invention is particularly satisfactory.
  • the upright V ribs may be filled at their upper surface, the extent of filling being determined by the V angle, the type of wood or paper fiber from which the tray is formed, and the weight and rib height. These factors may be selected to optimize window visibility, strength and nesting of the tray.
  • the steepest practical V" angle should be selected, to maximize filling to create a soft and relatively flat pallet surface; in practice an included V- angle of 5 to 35 has been shown to be satisfactory.
  • the fundamental aspects of the tray in accordance with the present invention may be said to be: spaced beam members, the spacing being open between such beam members to allow for viewing the tray contents between each beam of relatively solid material.
  • the section modulus of the beams must be such that in combination with the end and side walls, the total strength equals or exceeds the beam strength of a tray of the same material of equal weight with a flat, solid bottom.
  • FIG. 1 is a plan view of an embodiment of a tray in accordance with the present invention.
  • FIG. 2 is a bottom plan view of the tray of FIG. 1;
  • FIG. 3 is a section taken along line 3 3 of FIG. 1;
  • FIG. 4 is a plan view of a second embodiment in accordance with the present invention.
  • FIG. 5 is a bottom plan view of the tray of FIG. 5;
  • FIG. 6 is a section taken along line 6 6 of FIG. 4;
  • FIG. 7 is a top plan view of a third embodiment in accordance with the present invention.
  • FIG. 8 is a bottom plan view of the tray of FIG. 7;
  • FIG. 9 is a section taken along line 9 9, partly broken away;
  • FIG. 10 is a section taken along line 10 10 of FIG.
  • FIG. 11 is a top plan view of a fourth embodiment in accordance with the present invention.
  • FIG. 12 is a bottom plan view of the tray of FIG. 11;
  • FIG. 13 is a sectional view partly broken away along line 13 13 of FIG. 11;
  • FIG. 14 is a sectional view taken along line 14 14 of FIG. 11.
  • a tray is provided, primarily intended for the packaging of produce, although any food product may be packaged therein, in association with an overwrap film of transparent material such as plastic film or heat-sealable cellophane.
  • the food tray 10 has two upwardly and outwardly inclined opposite side walls 16 and two upwardly and outwardly inclined opposite end walls 18, both the end walls and side walls being preferably bowed as described in the Reifers US. Pat. 3,185,371.
  • each adjacent end and side wall merges as at a rounded corner 20, and the side and end walls terminate at their upper end in a downwardly and outwardly extending peripheral lip 22.
  • the tray 10 is provided with a plurality of ribs 24 extending along the bottom generally parallel to the side walls 16; and, preferably at right angles thereto, a plurality or ribs 26 extending generally parallel to the end walls 18.
  • these ribs form, in cross-section, an upright V-shape the walls of which are generally inclined at an angle of about 5 to with their apices 28 forming the external bottom of the tray; if desired, however, the ribs may be made fatter or wider in which case the external bottom of the tray lies in a plane above the true, imaginary apices of the ribs.
  • terminal portions 30 of the V-legs form the internal bottom of the tray upon which the produce or other food product rests.
  • the tenninal portions 30 of the upright V-legs are not so sharp that the food product is in any way cut, bruised or otherwise damaged.
  • the tray is intended for produce or hamburger, it is preferred that it be fabricated so that the interior of the V-ribs be essentially filled in.
  • An important feature of the present invention involves the height of the upright V-shaped ribs 24 and 26. It will be noted best from FIG. 3 that the height of such ribs is on the order of about five times the thickness of the material forming the side and end walls of the tray, in this illustrated embodiment. From this it will be understood that the ribs 24 and 26 are of substantial height to provide 'a fixed platform or pallet upon which the food product is supported. It will also be noted that the material forming the ribs in crosssection is thicker than the material forming the side walls, and such thickness may be controlled during the molding operation.
  • the volume of material provided in the upright V-shaped ribs 24 and 26 which form the platform is about equal to the volume of a flat, solid bottom of equal area which would be found in a conventional tray of equal size, wherein such flat, solid bottom would have a material thickness about the same as the side and end wall thickness.
  • a peripheral gutter-like bottom portion 32 which has an internal depth the same or approximately the smae as the internal depth of the V-ribs 24 and 26.
  • This peripheral groove 32 is formed by two walls, an inner peripheral wall 34 and an outer peripheral wall 36.
  • the inner peripheral wall 34 is preferably of the same slope and the same height as one of the inner walls of the V-shaped ribs 24 and 26; however, the outer peripheral wall 36 is relatively steep and does not rise to as great a height, i.e., it terminates in a plane lower than a plane passing through the upper terminal portions 30 of the V-ribs 24 and 26.
  • the outer peripheral wall 36 of the peripheral groove or gutter-like portion 32 in turn merges with a generally annular, planar bottom portion 38.
  • annular planar bottom wall 38 becomes very small, in many cases disappearing, in the area of the corner portions 20.
  • the annular bottom wall 38 in turn blends into the side walls 16 and the end walls 18 along a rounded or curved portion 40.
  • annular, planar bottom 38 lying outside of the groove 32, is provided with a bottom surface 38 which is raised a considerable distance above the true bottom of the tray defined by the outer apices 28 of the upright V-shaped ribs 24 and 26.
  • a relatively steep outer annular wall 36 is provided which connects the outer apex 32 of the peripheral groove 32 with the bottom 38 of the annular planar bottom wall 38, such annular wall 36' laying opposite groove wall 36 through the thickness of such groove wall.
  • FIGS. 4-6 there is shown a tray 100, particularly designed for the packaging of soft produce, intended to be overwrapped by a suitable transparent film.
  • the tray has two opposite upwardly and outwardly inclined side walls 116 and two opposite upwardly and outwardly inclined end walls 1 18, such end walls 118 extending upwardly to a greater height than the side walls 116 to afford greater protection to easily bruised fruit intended to be packaged therein. Adjacent end and side walls merge at rounded corners 120.
  • suitable denesting ledges 112 and 114 maybe provided at the corners of the end walls 1 l8 and along the side walls 116, respectively.
  • the tray 100 has a plurality of ribs 124 along the bottom generally parallel to the side walls 116 and a plurality of ribs 126 generally parallel to the end walls 118, defining open windows of generally rectangular configuration therebetween, although such windows may be circular.
  • ribs are V-shaped in cross-section having walls inclined at an angle of about 5 and with the inside of the V-ribs being almost completely filled m.”
  • the end walls 118 and side walls 116 curve and merge into the bottom along an annular transition zone 138.
  • Such annular transition zone 138 in turn merges into the outer peripheral rib 132'.
  • a slight indentation 132 may be provided along the top of the outer peripheral rib 132' thereby providing a peripheral gutter as in the embodiment of FIGS. 1-3.
  • FIGS. 7-10 The embodiment of FIGS. 7-10 is similar in many respects to the embodiment of FIGS. 4-6.
  • the tray 200 of FIGS. 7-10 is primarily designed for the packaging of soft produce, such as three tomatoes.
  • the tray 200 has two opposite upwardly inclined side walls 216 which extend directly from the bottom of the tray in a manner described below in greater detail. Extending out from the side walls 216 are denesting ledges 214.
  • the tray 200 also has two opposite upwardly and outwardly inclined end walls 218 which extend upwardly to a greater height than the side walls 216 to afford greater protection to the easily bruised fruit intended to be packaged therein.
  • the tray 200 has a plurality of ribs 224 along the bottom generally parallel to the side walls 216 and a plurality of ribs 226 generally parallel to the end walls 218, thereby defining open windows of generally rectangular configuration.
  • ribs are almost U- shaped with the inside of the U-ribs being almost completely filled in.
  • the ribs are about 3/16 inch in height.
  • each rib 224 and 226 has respectively associated therewith a horizontal flange portion 224 and 226'.
  • the width of such flanges 224 and 226 varies from a narrow point at the midpoint between two rib intersections to a maximum thickness at the point closest to the rib intersection, and this gives the ribs a slightly undulating configuration.
  • the width or thickness of the ribs including the flange portions are, in the present embodiment, about 5/16 inch; and the openings between ribs are about 13/16 inch square.
  • tray 100 of FIGS. 4-6 and the tray 200 of FIGS. 7-10 involves the greater window area in the tray 200. This is primarily accomplished by extending the windows very close to the end walls 218 and immediately adjacent to the side walls 216. Here the transition zone between the open bottom portion and the side and end walls constitutes an annular or-boundary rib 232'. As can best be seen in FIG. 10 the outer edge of the peripheral or boundary rib 232 continues to extend upwardly to form a continuous surface of constant slope with that portion of the side wall 216 below the denesting rib 214.
  • tray 300 of FIGS. 11-14 is essentially the same as the tray 200 of FIGS. 7-10, except that it is larger. These two trays 200 and 300 constitute a preferred form of the present invention. Like tray 200, it will be understood that tray 300 has end walls 318 and side walls 316, and open bottom portion defined by intersecting U or V-shaped ribs 324 and 326 wherein the open windows extend very close to the side and end walls to maximize visibility. The transistion zone between the open bottom portion and the side and end walls is defined by an annular boundary rib 332.
  • the method of fabrication does not constitute a part of the present invention and that any known fabrication method may be used. Normally, the preferred methods of fabrication involve various molding procedures.
  • the tray of the present invention is preferably formed of conventional wood pulp stock which may be molded from a water slurry, it will be understood that the ribs may be made of harder paper stock, or such ribs may be specially pressed or otherwise treated. If desired, the tray may be formed of other, equivalent material, it being understood that the scructural advantages of the tray of the present invention derives from its geometrical configuration.
  • the tray may be formed of a structural plastic foam, such as cellular polystyreen foam comprising on the order of percent void space, or porous polyolefin material or other open cell plastic, or a biodegradable plastic such as special biodegradable foam polystyrene. If formed of material having different characteristics than the preferred molded wood pulp, various changes in the configuration may be necessary and, depending upon the material, certain advantages may be absent.
  • the tray of the present invention has many advantages, a number of which have been delineated above. In brief, however, it may be noted:
  • Both sides of the packaged food may be viewed, providing up to 55-85 percent view of contents depending in part upon the height of the opaque side and end walls.
  • the bottom of the food product viewed through the windows between ribs is very easy to see since the light, passing along the sides of the ribs, fully illuminates the bottom of the packaged product without casting any shadows.
  • an improved visibility may be provided compared to clear plastic trays which introduce an added layer of plastic in addition to the overwrap film, and which collect moisture often impairing vision.
  • the tray has sufficient strength to resist handling during wrapping; compression of film on the inward side wall is the main force which tends to cause side wall deformation or collapse, but the present tray resists such deformation or collapse.
  • the tray resists handling in the store and by consumer at home; insufficient beam strength of package for weight of contents may tend to deform or break the package when it is lifted, but the tray of the present invention tends to resist such deformation or breakage.
  • Breathability The open structure promotes oxygen transfer which, for the packaging of meat in particular, maintains better food product color. This provides for maintenance of meat bloom and quality over the extended period for store sale and home storage.
  • Refrigeration Beam bottom construction holds food products suspended, providing improved air circulation for oxygenation, improved cooling and water evaporation where it occurs, such as in meats, without loss of nutrients.
  • the trays of the present invention also have no problem of either cutting overwrap film or causing any damage to the packaged food product, particularly when the tray is formed of molded wood pulp. This is so because the edges of the wood pulp are soft and provide a soft support for the food product and also protect the film which contacts the tray.
  • the tray of the present invention is preferably formed or preformed using a female die, directly contrary to the normal practice wherein a male die is used as the deposition form for molded wood pulp food trays.
  • a female die By the expedient of using such a female die, the screen or finished surface is provided on the outside of the tray, while the inside has a rougher and softer finish, such softer finish serving to enhance the protection of the food product packaged therewithin, while minimizing bruising or other damage.
  • the pulp deposits to a greater thickness in the troughs of the V-shaped ribs, and this may be easily controlled, as indicated above, by the angle of the V, it being understood that the narrower the angle, the greater the pulp will fill in on the interior of the V- shaped ribs 24 and 26, thereby providing more of a cushion surface on the inside of the tray.
  • a characteristic of molding a tray from wood pulp followed by free drying is the tendency of the tray bottom to warp upwardly during drying to provide a convex bottom on the inside. This characteristic is disadvantageous since the finished trays unless specially treated such as by form drying, after pressing, etc. will have a slightly concave external bottom which tends to inhibit film sealing when overwrapping the package. This also occurs in a ribbed open bottom tray when a male die is used.
  • the invention is not limited to the embodiments disclosed which are offered illustratively, and that modifications may be made without departing from the invention; for example, variations in the spacing, height and arrangement of the ribs and the windows may be made (e.g., the windows may be round, rectangular, diamond-shaped, etc.; the ribs may join rather than cross so as to provide a brick-work or staggered rectangular window pattern), and variations in the merger configuration between the walls and bottom of the tray may be made.
  • a generally rectangular molded tray primarily for the packaging of food in conjunction with the transparent overwrap film heat-sealed thereabout, said tray comprising a pair of upwardly and outwardly inclined opposite side walls, each of said side walls forming a long side of said tray; and a pair of upwardly and outwardly inclined opposite end walls, each said end wall being adjacent to each said side walls and disposed at generally right angles thereto and thereby forming the rectangular configuration of said tray; the improvement comprising:
  • said means comprising a plurality of ribs having an upright V-shaped cross-section, said ribs extending at least partly across said tray in at least two directions to define therebetween a plurality of open windows, said ribs forming the tray bottom having a volume substantially equal to the volume of a bottom of a tray of equal size having a flat, solid bottom.
  • a tray in accordance with claim 1 molded of wood pulp.
  • a tray in accordance with claim 1 further comprising an annular V-shaped rib extending around the periphery of the bottom portion and to which said ribs extend.
  • a tray in accordance with claim 1 molded of wood pulp with a screen textured outer surface.
  • a tray in accordance with claim 1 wherein some of said ribs extend across said tray generally parallel to said side walls, and the remainder of said ribs extend across said tray generally parallel to said end walls, said ribs crossing at substantial right angles to define said open windows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
US00256453A 1972-05-24 1972-05-24 High strength open bottom packaging tray Expired - Lifetime US3756492A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25645372A 1972-05-24 1972-05-24

Publications (1)

Publication Number Publication Date
US3756492A true US3756492A (en) 1973-09-04

Family

ID=22972297

Family Applications (1)

Application Number Title Priority Date Filing Date
US00256453A Expired - Lifetime US3756492A (en) 1972-05-24 1972-05-24 High strength open bottom packaging tray

Country Status (2)

Country Link
US (1) US3756492A (sv)
SE (1) SE392445B (sv)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845896A (en) * 1973-01-31 1974-11-05 Keyes Fibre Co Open bottom tray with multiple pedestal display platform
US3885727A (en) * 1974-04-18 1975-05-27 Keyes Fibre Co Packaging tray with juice trapping viewing windows
US3894679A (en) * 1974-06-21 1975-07-15 Diamond Int Corp High strength open bottom packaging tray
US3986655A (en) * 1976-02-03 1976-10-19 Keyes Fibre Company Packaging tray
US4162759A (en) * 1977-12-30 1979-07-31 Diamond International Corporation Food packaging tray
US4442969A (en) * 1983-04-28 1984-04-17 Mobil Oil Corporation Reinforced packaging tray
US4453628A (en) * 1983-04-01 1984-06-12 Container Corporation Of America Bacon package inner pad
US20110217430A1 (en) * 2010-03-08 2011-09-08 Chieh-Chun Chau Thermoplastic and biodegradable polymer foams containing oxygen scavenger
US9540143B2 (en) 2013-10-08 2017-01-10 Cascades Canada Ulc Poultry tray and method of packaging poultry using same
USD789789S1 (en) * 2015-07-10 2017-06-20 Foodcap International Limited Container closure

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US442500A (en) * 1890-12-09 Tray for holding caramels
US2310465A (en) * 1939-08-18 1943-02-09 Autoyre Co Inc Carton and tray therefor
US2918379A (en) * 1958-08-04 1959-12-22 Campbell Lurie Plastics Inc Meat packaging and the like
US2922541A (en) * 1954-08-05 1960-01-26 Martelli Guido Fruit packing
US3056232A (en) * 1957-06-03 1962-10-02 Diamond National Corp Molded pulp article
US3185371A (en) * 1963-05-24 1965-05-25 Diamond Int Corp Molded pulp article
US3217962A (en) * 1964-06-22 1965-11-16 Plastic Packaging Corp Packaging means
US3346400A (en) * 1965-02-08 1967-10-10 American Excelsior Corp Tray
US3357625A (en) * 1966-06-07 1967-12-12 Malanco Inc Meat tray with window
US3480178A (en) * 1968-09-16 1969-11-25 Henry Z Morgan Containers that are compactly nestable when empty and stackable in spaced relation when full
US3698623A (en) * 1970-07-09 1972-10-17 Diamond Int Corp Open bottom meat container

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US442500A (en) * 1890-12-09 Tray for holding caramels
US2310465A (en) * 1939-08-18 1943-02-09 Autoyre Co Inc Carton and tray therefor
US2922541A (en) * 1954-08-05 1960-01-26 Martelli Guido Fruit packing
US3056232A (en) * 1957-06-03 1962-10-02 Diamond National Corp Molded pulp article
US2918379A (en) * 1958-08-04 1959-12-22 Campbell Lurie Plastics Inc Meat packaging and the like
US3185371A (en) * 1963-05-24 1965-05-25 Diamond Int Corp Molded pulp article
US3217962A (en) * 1964-06-22 1965-11-16 Plastic Packaging Corp Packaging means
US3346400A (en) * 1965-02-08 1967-10-10 American Excelsior Corp Tray
US3357625A (en) * 1966-06-07 1967-12-12 Malanco Inc Meat tray with window
US3480178A (en) * 1968-09-16 1969-11-25 Henry Z Morgan Containers that are compactly nestable when empty and stackable in spaced relation when full
US3698623A (en) * 1970-07-09 1972-10-17 Diamond Int Corp Open bottom meat container

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845896A (en) * 1973-01-31 1974-11-05 Keyes Fibre Co Open bottom tray with multiple pedestal display platform
US3885727A (en) * 1974-04-18 1975-05-27 Keyes Fibre Co Packaging tray with juice trapping viewing windows
US3894679A (en) * 1974-06-21 1975-07-15 Diamond Int Corp High strength open bottom packaging tray
US3986655A (en) * 1976-02-03 1976-10-19 Keyes Fibre Company Packaging tray
US4162759A (en) * 1977-12-30 1979-07-31 Diamond International Corporation Food packaging tray
US4453628A (en) * 1983-04-01 1984-06-12 Container Corporation Of America Bacon package inner pad
US4442969A (en) * 1983-04-28 1984-04-17 Mobil Oil Corporation Reinforced packaging tray
US20110217430A1 (en) * 2010-03-08 2011-09-08 Chieh-Chun Chau Thermoplastic and biodegradable polymer foams containing oxygen scavenger
US9540143B2 (en) 2013-10-08 2017-01-10 Cascades Canada Ulc Poultry tray and method of packaging poultry using same
USD789789S1 (en) * 2015-07-10 2017-06-20 Foodcap International Limited Container closure

Also Published As

Publication number Publication date
SE392445B (sv) 1977-03-28

Similar Documents

Publication Publication Date Title
US3718274A (en) High strength open bottom packaging trays
US3894679A (en) High strength open bottom packaging tray
US3420431A (en) Tray structure
US3651976A (en) Molded packaging tray
US4533585A (en) Liquid holding packaging tray
US3885727A (en) Packaging tray with juice trapping viewing windows
US3675815A (en) Bakery tray
US3756492A (en) High strength open bottom packaging tray
US3700096A (en) Food packaging tray
US3349943A (en) Bottle carrying and stacking case
US2660529A (en) Consumer package for fresh fruits or the like
US3450326A (en) Food container
US3682365A (en) High strength open bottom meat container
US3341064A (en) Container
US3907111A (en) Self-cleaning stackable container
US3485434A (en) Tray structure
US3764057A (en) High strength open bottom packaging tray
US3695479A (en) Tray with reinforced article pockets
US3885728A (en) Packaging tray with upper and lower viewing windows
NO152686B (no) Formstoept brett til synlig innpakning av varer, f.eks. ferskt kjoett
US4058247A (en) Commodity packaging tray
US1975129A (en) Container or package for eggs, etc.
US3845896A (en) Open bottom tray with multiple pedestal display platform
US6918506B2 (en) Packaging container
US6899249B2 (en) Tray for storing and transporting products

Legal Events

Date Code Title Description
AS Assignment

Owner name: PACKAGINING CORPORATION OF AMERICA, EVANSTON, ILL.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE SEPT 26,1983;ASSIGNOR:DIAMOND INTERNATIONAL CORPORATION,;REEL/FRAME:004311/0207

Effective date: 19840731

AS Assignment

Owner name: PACKAGING CORPORATION OF AMERICA EVANSTON, IL A CO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DIAMOND INTERNATIONAL CORPORATION;REEL/FRAME:004359/0673

Effective date: 19850803