EP0041307B1 - A plastics tray or crate particularly for transporting hard fruit - Google Patents

A plastics tray or crate particularly for transporting hard fruit Download PDF

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Publication number
EP0041307B1
EP0041307B1 EP81200598A EP81200598A EP0041307B1 EP 0041307 B1 EP0041307 B1 EP 0041307B1 EP 81200598 A EP81200598 A EP 81200598A EP 81200598 A EP81200598 A EP 81200598A EP 0041307 B1 EP0041307 B1 EP 0041307B1
Authority
EP
European Patent Office
Prior art keywords
crate
tray
reinforcing member
plastics
edge
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
Application number
EP81200598A
Other languages
German (de)
French (fr)
Other versions
EP0041307A2 (en
EP0041307A3 (en
Inventor
Johannes Theodorus Krassenburg
Johannes Cornelis Molijn
Ernst Ettema
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.)
Wavin BV
Original Assignee
Wavin BV
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 Wavin BV filed Critical Wavin BV
Priority to AT81200598T priority Critical patent/ATE9884T1/en
Publication of EP0041307A2 publication Critical patent/EP0041307A2/en
Publication of EP0041307A3 publication Critical patent/EP0041307A3/en
Application granted granted Critical
Publication of EP0041307B1 publication Critical patent/EP0041307B1/en
Expired legal-status Critical Current

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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
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents

Definitions

  • the invention relates to a plastics crate or tray having upstanding walls and a bottom particularly for transporting hard fruit, the outer side of the bottom of said plastics crate or tray being reinforced by means of at least one hollow elongate plastic reinforcing member being connected with said bottom.
  • Such a plastics crate or tray formed by welding a bottom part and upstanding walls, the elongate hollow reinforcing members being also welded to the bottom is known from DE-A-1.948.503.
  • This crate presents the disadvantage that the different parts have to be separately moulded and subsequently assembled which makes the crate or tray expensive and moreover a rather thick bottom is required in order to meet the requirements that the bottom is sufficiently rigid thus providing the so-called "trampoline" effect during transporting of fruit;
  • the bottom is not allowed to sag under the load of the contents of the crate or tray when its underside is unsupported even after a long period of time; the bottom should be so flat so that it cannot form impressions on the contents of the crate or tray and the bottom of the crate or tray should have such a configuration that no dirt can gather at that location, whilst an incidental contact between subjacent fruit and said bottom should not cause an impression of the bottom in said fruit.
  • the hollow reinforcing member comprises at least one pair of opposite walls conveying towards the centre of the reinforcing member and the bottom of said reinforcing member is provided with at least one member aperture, the area near said member aperture being reinforced by reinforcing ribs.
  • a reinforcing member comprising at least one pair of opposite walls of the reinforcing member allows an easy retraction of the core members contrary to core members having substantially the same cross section over their whole length as such core members get clamped in the member due to shrinkage of the moulded plastic material.
  • tray or crate should be provided with a rather thin bottom in order to save plastics and to avoid long cooling times elongate members of a substantial cross section should be used requiring heavy core parts.
  • the presence of a member aperture in the bottom of the elongate member now allows to support the heavy parts.
  • the crate or tray according to the invention may be provided with a thin bottom as the hollow members being integral with the bottom due to the injection moulding allows the use of thinner bottom than bottoms provided with reinforcing members welded to the bottom.
  • An injection moulded plastics tray or crate comprising a bottom being connected through downwardly ccombined extending bottom parts with the upstanding walls is known per se from FR-A-1.452.995.
  • the outer side of the bottom is integral with parallel reinforcing ribs extending perpendicular to the bottom.
  • This crate or tray presents the disadvantage that an appropriate reinforcement of the bottom requires many reinforcing ribs and as these ribs are rather sharp edged fruit may be easily damaged by these ribs during stacking such crates or trays.
  • vent apertures are provided in the lower portions of the bottom which simultaneously provide an outlet for liquid, such as washing liquid and of dirt, if any.
  • the shape of the bottom of the plastics crate or tray according to the invention is chosen in such a manner that said crate or tray may at least rest upon a floor through parts differing from a hollow reinforcing member according to the invention.
  • the latter measure is very convenient, as damage of fruit due to the presence of such a reinforcing member according to the invention, need not necessarily be taken into account when entirely filling a plastics crate or tray and subsequently stacking a second filled crate or tray thereupon.
  • the lower side of the circumference of the bottom comprises a bottom edge into which the hollow reinforcing members open.
  • the height of said bottom edge is preferably such that a reinforcing member cannot rest upon the floor, so that the reinforcing member a members are unable to distort the bottom of the crate or tray, thus causing a damage of its contents.
  • the plastics crate or tray of fig. 1 consists of two longitudinal side walls 1 and two transverse side walls 2 being interconnected, by means of preferably hollow corner parts 3 for supporting superposed trays or crates; the plastics crate or tray further comprises a bottom 4 connected with the longitudinal side walls 1 and the transverse side walls 2.
  • each elongate reinforcing member 5 has two open ends.
  • the plastics crate or tray according to the invention comprises venting apertures, reinforcement ribs, handles and so on as known per se and which will not be described.
  • Fig. 2 shows a cross-section according to line II-II in fig. 1.
  • the elongate reinforcing member 5 converges towards the centre from both its two open ends.
  • the tapering embodiment of the elongate reinforcing member facilitates the removal of injection moulding cores and prevents furthermore damages to the walls of a member 5.
  • Fig. 2 also shows that the centre of the member presents an aperture 7 formed during the injection moulding process by a support (not shown) of the injection moulding mould in order to support the extremities of cores (likewise not shown) around which core an elongate reinforcing member 5 is injection moulded.
  • reinforcement ribs 8 are provided in the vicinity of the aperture 7.
  • Fig. 3 shows a partial cross section of the plastics crate or tray according to line III-III in fig. 1.
  • two elongate reinforcing members 5 are situated above the plane through the free ends of a circumferential bottom edge 6, whilst the bottom 4 inclines from the member or members 5 towards bottom edge portions running parallel with said member or members.
  • bottom apertures 9 are provided for an outlet of liquid and moisture and for obtaining some ventilation.
  • the bottom part between the two parallel members 5 is a flat bottom part.
  • one or more apertures 10 in the bottom edge 6 allows a ventilation and outlet of e.g. washing or leakage water from the part of the floor below the plastics crate or tray.
  • Fig. 4 is a botton view of an area including and surrounding aperture 7, of a reinforcing member 5. This figure also shows the reinforcing ribs 8, as previously illustrated in figures 2 and 3, each rib at least extending between two walls of a reinforcing member and the converging shape of a member 5.
  • apertures 7 formed during injection moulding due to the presence of supports for the cores as required for forming the members 5. These apertures 7 , may be closed by means of covers 11 with nocks 12 engaging the bottom part of a member 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Stackable Containers (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Packages (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Packaging Of Special Articles (AREA)

Abstract

An injection moulded crate or tray comprising upstanding walls 1,2 and a bottom 4. The lower side of the bottom 4 is integral with two cases 5 extending parallel to an upstanding wall. The case or cases 5 open into a circumferential bottom edge 6. A pair of opposite walls 7,8 of each case 5 converges towards the centre of each case 5. The bottom 4 of the crate or tray inclines from each of the cases 5 towards the bottom edge 6, the bottom part between the cases 5 being a flat part.

Description

  • The invention relates to a plastics crate or tray having upstanding walls and a bottom particularly for transporting hard fruit, the outer side of the bottom of said plastics crate or tray being reinforced by means of at least one hollow elongate plastic reinforcing member being connected with said bottom.
  • Such a plastics crate or tray formed by welding a bottom part and upstanding walls, the elongate hollow reinforcing members being also welded to the bottom is known from DE-A-1.948.503. This crate presents the disadvantage that the different parts have to be separately moulded and subsequently assembled which makes the crate or tray expensive and moreover a rather thick bottom is required in order to meet the requirements that the bottom is sufficiently rigid thus providing the so-called "trampoline" effect during transporting of fruit; the bottom is not allowed to sag under the load of the contents of the crate or tray when its underside is unsupported even after a long period of time; the bottom should be so flat so that it cannot form impressions on the contents of the crate or tray and the bottom of the crate or tray should have such a configuration that no dirt can gather at that location, whilst an incidental contact between subjacent fruit and said bottom should not cause an impression of the bottom in said fruit.
  • However, a thick, solid bottom presents the disadvantages, that the crate or tray becomes heavy, that much plastics material has to be used and that the production of said crate or tray with respect to the required period of cooling of the latter is very timeconsuming.
  • On the other hand forming such a crate by injection moulding is rather difficult as after cooling it is rather difficult to retract the cores from the interior of the hollow reinforcing member as these cores get clamped due to shrinkage of the plastic material.
  • It is now the aim of the invention to provide a crate or tray of the aforementioned type which does not present the aforementioned disadvantages.
  • This aim is attained in that in an injection moulded crate or tray the hollow reinforcing member comprises at least one pair of opposite walls conveying towards the centre of the reinforcing member and the bottom of said reinforcing member is provided with at least one member aperture, the area near said member aperture being reinforced by reinforcing ribs.
  • The use of a reinforcing member comprising at least one pair of opposite walls of the reinforcing member allows an easy retraction of the core members contrary to core members having substantially the same cross section over their whole length as such core members get clamped in the member due to shrinkage of the moulded plastic material.
  • Moreover, as the tray or crate should be provided with a rather thin bottom in order to save plastics and to avoid long cooling times elongate members of a substantial cross section should be used requiring heavy core parts. The presence of a member aperture in the bottom of the elongate member now allows to support the heavy parts.
  • At last the use of reinforcing ribs in the region of the aperture compensates the decrease of strength of the hollow member due to the presence of the member aperture.
  • At last the crate or tray according to the invention may be provided with a thin bottom as the hollow members being integral with the bottom due to the injection moulding allows the use of thinner bottom than bottoms provided with reinforcing members welded to the bottom.
  • An injection moulded plastics tray or crate comprising a bottom being connected through downwardly ccombined extending bottom parts with the upstanding walls is known per se from FR-A-1.452.995. The outer side of the bottom is integral with parallel reinforcing ribs extending perpendicular to the bottom.
  • This crate or tray presents the disadvantage that an appropriate reinforcement of the bottom requires many reinforcing ribs and as these ribs are rather sharp edged fruit may be easily damaged by these ribs during stacking such crates or trays.
  • Advantageously in a crate or tray according to the invention comprising bottom parts extending downwardly from the bottom to the lower side of the upstanding walls, vent apertures are provided in the lower portions of the bottom which simultaneously provide an outlet for liquid, such as washing liquid and of dirt, if any.
  • Preferably the shape of the bottom of the plastics crate or tray according to the invention is chosen in such a manner that said crate or tray may at least rest upon a floor through parts differing from a hollow reinforcing member according to the invention. The latter measure is very convenient, as damage of fruit due to the presence of such a reinforcing member according to the invention, need not necessarily be taken into account when entirely filling a plastics crate or tray and subsequently stacking a second filled crate or tray thereupon.
  • In order to improve a more even positioning of the plastics crate or tray upon the floor, the lower side of the circumference of the bottom comprises a bottom edge into which the hollow reinforcing members open. The height of said bottom edge is preferably such that a reinforcing member cannot rest upon the floor, so that the reinforcing member a members are unable to distort the bottom of the crate or tray, thus causing a damage of its contents. By locally providing the latter bottom edge with edge apertures an outlet for liquid, such as washing or leakage liquid and of dirt, is provided.
  • When the height of two opposite parts of the abovementioned edge is locally greater than that of two other opposite parts of the edge and the hollow members a fork can be inserted between the higher bottom edge parts of the crate or tray and the floor, for conveying purposes.
  • The present invention will be illustrated, by means of an embodiment as shown in the accompanying drawings, wherein
    • Figure 1 shows a perspective view of a plastics crate or tray according to the invention;
    • Figure 2 shows a cross-section of the plastics crate or tray according to line II-II in figure 1;
    • Figure 3 shows a cross-section of part of the plastics crate or tray according to line III-III in figure 1;
    • Figure 4 shows a lower view of part of the bottom of a plastics crate or tray in accordance with the invention.
  • The plastics crate or tray of fig. 1 consists of two longitudinal side walls 1 and two transverse side walls 2 being interconnected, by means of preferably hollow corner parts 3 for supporting superposed trays or crates; the plastics crate or tray further comprises a bottom 4 connected with the longitudinal side walls 1 and the transverse side walls 2.
  • On the outer side of the bottom 4 two hollow elongate reinforcing members 5 are provided which preferably open into a circumferential bottom edge 6 of the bottom 4 so that each elongate reinforcing member 5 has two open ends.
  • The plastics crate or tray according to the invention comprises venting apertures, reinforcement ribs, handles and so on as known per se and which will not be described.
  • Fig. 2 shows a cross-section according to line II-II in fig. 1. As can be seen in fig. 2, the elongate reinforcing member 5 converges towards the centre from both its two open ends. The tapering embodiment of the elongate reinforcing member facilitates the removal of injection moulding cores and prevents furthermore damages to the walls of a member 5.
  • Fig. 2 also shows that the centre of the member presents an aperture 7 formed during the injection moulding process by a support (not shown) of the injection moulding mould in order to support the extremities of cores (likewise not shown) around which core an elongate reinforcing member 5 is injection moulded. In order to reinforce the area of each member 5 around the aperture 7, reinforcement ribs 8 are provided in the vicinity of the aperture 7.
  • Fig. 3 shows a partial cross section of the plastics crate or tray according to line III-III in fig. 1. According to this preferred embodiment two elongate reinforcing members 5 are situated above the plane through the free ends of a circumferential bottom edge 6, whilst the bottom 4 inclines from the member or members 5 towards bottom edge portions running parallel with said member or members. At suitable points of the lower portions of bottom 4, bottom apertures 9 are provided for an outlet of liquid and moisture and for obtaining some ventilation. The bottom part between the two parallel members 5 is a flat bottom part.
  • The provision of one or more apertures 10 in the bottom edge 6 allows a ventilation and outlet of e.g. washing or leakage water from the part of the floor below the plastics crate or tray.
  • By giving one pair of opposite portions of bottom edge 6 a greater height than the other pair of opposite portions and the elongate reinforcing member or members 5, a slit-shaped opening between the floor and the crate or tray placed thereupon is obtained. By pushing a plate through said opening to below the crate or tray, said crate or tray becomes easily conveyable by means of, for example, a fork lift truck.
  • It should be noted that a lack of said bottom edge 6 and a direct contact of the members 5 with the floor, would only permit such a conveyance by shifting a single crate or tray or a stack of said crates or trays resting upon the floor.
  • Fig. 4 is a botton view of an area including and surrounding aperture 7, of a reinforcing member 5. This figure also shows the reinforcing ribs 8, as previously illustrated in figures 2 and 3, each rib at least extending between two walls of a reinforcing member and the converging shape of a member 5.
  • In some cases it may be recommended to close the open ends of a hollow member 5 with closing lips 13 which are hingeably connected with the bottom of member 5. The lips 13 are then provided with nocks 14 which engage depressions or apertures 15 in the upper part of a member.
  • As already mentioned hereinbefore the lower side of the members 5 present apertures 7 formed during injection moulding due to the presence of supports for the cores as required for forming the members 5. These apertures 7 , may be closed by means of covers 11 with nocks 12 engaging the bottom part of a member 5.

Claims (9)

1. A plastics crate or tray having upstanding walls (1, 2), and a bottom (4) particularly for transporting hard fruit, the outer side of the bottom (4) of said plastics crate or tray being reinforced by means of at least one hollow elongate plastic reinforcing member (5) being connected with said bottom (4) characterized in that the crate or tray is injection moulded and the hollow reinforcing member (5) comprises at least one pair of opposite walls converging towards the centre of the reinforcing member (5) and the bottom of said reinforcing member (5) is provided with at least one member aperture (7), the area near said member aperture being reinforced by reinforcing ribs (8).
2. A plastics crate or tray according to claim 1, characterized in that each pair of opposite walls of a reinforcing member (5) converge towards the centre of said reinforcing member (5).
3. A plastics crate or tray according to claim 1 or 2, characterized in that at least one member aperture (7) is in the centre of a reinforcing member (5).
4. A plastics crate or tray according to any one of the preceding claims, characterized in that the crate or tray comprises two parallel extending reinforcing members (5), the bottom (4) having a substantially horizontal plane between the two members (5) and none of said members (5) projecting below the other portions of the plastics crate or tray.
5. A plastics crate or tray according to claim 4, characterized in that the lower portions of the bottom comprise bottom apertures (9).
6. A plastics crate or tray according to any one of claims 1 to 5, characterized in that the reinforcing member (5) extends into a circumferential edge (6) of the bottom (4), preferably said edge (6) being higher than the member(s) (5).
7. A plastics crate or tray according to claim 5 or 6, characterized in that the lower side of said circumferential edge (6) is locally provided with edge apertures (10).
8. A plastics crate or tray according to claim 5 or 7, characterized in that the dimensions of the reinforcing member(s) (5) and bottom edge (6) are such that the edge projects locally beyond said member(s).
EP81200598A 1980-06-04 1981-06-03 A plastics tray or crate particularly for transporting hard fruit Expired EP0041307B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81200598T ATE9884T1 (en) 1980-06-04 1981-06-03 PLASTIC TRANSPORT BOX, ESPECIALLY FOR FRUITS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8003269 1980-06-04
NL8003269A NL8003269A (en) 1980-06-04 1980-06-04 PLASTIC HOLDER FOR INCLUDING IN PARTICULAR HARD FRUIT.

Publications (3)

Publication Number Publication Date
EP0041307A2 EP0041307A2 (en) 1981-12-09
EP0041307A3 EP0041307A3 (en) 1982-04-21
EP0041307B1 true EP0041307B1 (en) 1984-10-17

Family

ID=19835421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200598A Expired EP0041307B1 (en) 1980-06-04 1981-06-03 A plastics tray or crate particularly for transporting hard fruit

Country Status (5)

Country Link
EP (1) EP0041307B1 (en)
AT (1) ATE9884T1 (en)
DE (1) DE3166694D1 (en)
DK (1) DK153077C (en)
NL (1) NL8003269A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3526691A1 (en) * 1985-05-04 1987-01-15 Schoeller & Co Ag A BOTTLE BOX, ESPECIALLY HIGH OR LOW BOX
ATE171650T1 (en) * 1993-06-03 1998-10-15 Beckman Coulter Inc SAMPLE CARRIER
US5531352A (en) * 1993-07-09 1996-07-02 Kradon, Inc. Agricultural container
DE20006767U1 (en) * 2000-04-12 2000-08-24 Schaefer Gmbh Fritz Box-shaped container made of plastic
DE20110191U1 (en) * 2001-06-20 2002-08-01 Schaefer Gmbh Fritz Plastic containers
CL2016000856A1 (en) * 2016-04-12 2017-07-14 Wenco Sa Plastic container for storage and transport of agricultural products; method to stack containers.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES108801Y (en) * 1963-10-21 1965-06-16 Montecatini Soc Generale Per Lindustria Mineraria E Chimica A BOX FOR DELIVERY OF FISH OR OTHER PRODUCTS THAT REQUIRE AN INDEPENDENT DRAINAGE OF LIQUID RESIDUES
FR1452995A (en) * 1965-11-02 1966-04-15 Alba Imballaggi S P A Stamped container, in synthetic plastic, intended in particular to contain fruit and vegetables
US3443722A (en) * 1966-01-21 1969-05-13 Nosco Plastics Plastic case
FR2031222A5 (en) * 1969-01-27 1970-11-13 Si Re Soc Az Siracusana Foamed plastic receptacle for fruit and - vegetables
DE1948503A1 (en) * 1969-09-25 1971-04-01 Erich Amrogowicz Stackable container
US3902599A (en) * 1970-05-29 1975-09-02 Stromberg & Co As Svein Transport box for fish or other food
DE2421886A1 (en) * 1974-05-07 1975-11-20 Apparate Spezial Technik Gmbh Thin-walled rectangular tub for grapes - has horizontal wall reinforcement corrugations decreasing in length and depth downwards

Also Published As

Publication number Publication date
ATE9884T1 (en) 1984-11-15
DE3166694D1 (en) 1984-11-22
NL8003269A (en) 1982-01-04
EP0041307A2 (en) 1981-12-09
DK153077B (en) 1988-06-13
DK153077C (en) 1988-10-31
DK244981A (en) 1981-12-05
EP0041307A3 (en) 1982-04-21

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