US3756429A - Plastic pallet - Google Patents

Plastic pallet Download PDF

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Publication number
US3756429A
US3756429A US00205640A US3756429DA US3756429A US 3756429 A US3756429 A US 3756429A US 00205640 A US00205640 A US 00205640A US 3756429D A US3756429D A US 3756429DA US 3756429 A US3756429 A US 3756429A
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United States
Prior art keywords
pallet
containers
stack
height
projections
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
US00205640A
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English (en)
Inventor
W Bingemann
H Fleischer
K Dickhauser
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.)
Kalle GmbH and Co KG
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Kalle GmbH and Co KG
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 Kalle GmbH and Co KG filed Critical Kalle GmbH and Co KG
Application granted granted Critical
Publication of US3756429A publication Critical patent/US3756429A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
    • B65D71/70—Trays provided with projections or recesses in order to assemble multiple articles, e.g. intermediate elements for stacking

Definitions

  • This invention relates to a tray-like pallet made of stiff plastic material and suitable for use in the setting up of a stack of identical containers each having a top with an outline capable of providing support and different in area from the outline of the bottom thereof, the said pallet having on one face a plurality of noninterconnected projection means between a number of which the base of each container of a series of containers forming a single tier of the stack can be sufficiently confined to produce a stable stack, and having on the other face a plurality of projection means between a number of which the top of each container of a series of containers forming a lower tier of the stack also can be sufficiently confined to produce a stable stack, the pallet being in addition so formed that a plurality thereof are stackable when not in use.
  • pallets Apart from the customary wooden racks, a variety of pallets have been developed for sorting, stacking and transporting containers, such as beakers filled with dairy products or fruit juice drinks.
  • a large number consist of corrugated paper and/or cardboard or Styropor (foamed polystyrene) of a particular shape.
  • plastic pallets wherein the containers to be inserted are inserted into appropriately fitting recesses which peripherally confine the container. Since the recesses are matched to the shape of the containers to be manufactured, the insertion of the containers into the pallet is expensive as regards machine construction, which must be such as to ensure accurate insertion. If the container is slightly displaced relative to the pallet, as a result of slight inaccuracies in the machine guide mechanism, or as a result of deformation of the beakers supplied and as a result of possible errors in operation, the containers are introduced in a displaced or angled position relative to the pallet, as a result of which both are destroyed. This results in time-consuming machine stoppages in addition to the obvious economic losses.
  • a further disadvantage of the known plastic pallets is that when present in a stack they can easily slip and thus only very low stacking heights are achievable. Unless additionally an interlayer, preferably of cardboard, is also inserted, the edges, which are often very sharp, can destroy the mostly very thin lids of the filled containers, as a result of which the contents, for example dairy products, may spoil.
  • Apertured pallets of Styropor are also very suitable for transportation but have the great disadvantage that the empty pallets are very bulky in transportation and storage. Where several thousand pallets per day are required, this means that the user either has to provide an uneconomical amount of storage space or make use of equally uneconomical daily delivery.
  • Styropor pallets can, however, be constructed to be themselves stackable, since they are molded in such a way that they engage with one another when stacked and hence do not permit lateral displacement.
  • the total thickness of the material of the pallet must be made considerable, especially at the locking points, since Styropor is very prone to break and hence relatively easily destroyed.As a result, the pallet spacing, from layer to layer, is 5 to 20 mm. When the space availability restricts the stacking height, far fewer layers can be placed on top of one another than in the case of cardboard pallets, which again is regarded as a considerable shortcoming.
  • the present invention provides a tray-like pallet made of stiff plastic material and suitable for use in the setting up of a stack of identical containers each having a top with an outline capable of providing support and different area from the outline of the bottom thereof, the pallet having on one face a multiplicity of noninterconnected projections between a plurality of which the base of each container of a series of containers forming a single tier of the stack can be sufficiently confined to produce a stable stack, and having on the other face a multiplicity of projections between a pluraity of which the top of each container of a series of containers forming a lower tier of the stack also can be sufficiently confined to produce a stable stack, the pallet being in addition so formed that a plurality thereof are stackable when not in use.
  • the projections intended to confine the bottoms of the containers are preferably made of a height which is more than 15 percent of the height of the container to be confined.
  • the projections intended to confine the tops of the containers are advantageously 0.5 to 50 mm, preferably 3 to 10 mm in height.
  • the pallet according to the invention on arranging the containers, especially beakers, thereon, the latter are centered between two or more of the projections, or raised portions, on the upper side of the pallet and on superposing a further pallet the upper edge portions of the beakers are confined by two or more of the projections, or depressed portions, on the underside of this latter pallet, so that lateral slipping is impossible.
  • the pallet according to the invention is especially useful in factories which palletize liquid goods, as, for example, dairies, fruit juice packing stations and similar factories.
  • the plastic pallet of the invention being moisture-insensitive, has a further advantage over cardboard containers owing to the fact that, for example, yoghurt can be further incubated in climatically controlled cabinets without an additional working step. As a result of the temperature changes, the containers become moist. Packaging in cardboard pallets was therefore hitherto possible only after the incubation process, Which required an additional process step.
  • the plastic pallet of the invention is employed immediately after filling the beakers.
  • the stack consisting of several layers can be passed directly to the incubation process. After this process the product can be delivered directly since repacking is unnecessary.
  • the pallet can possess a number of perforations.
  • the warm air thus can flow through the pallet in a vertical direction as well as horizontally.
  • the containers are thus uniformly subjected to the effects of the warm air.
  • a further advantage results from the fact that the pallet is so constructed that the stacking pressure to which the lowest container is exposed is borne by the container wall.
  • the usual aluminum foil lid, which in the case of such beakers is mostly thin, is thus not subjected to load, though all the containers, which are in most cases of conical shape, stand vertically one above another.
  • the projections on either or both faces are resiliently deformable. This results in the advantage that even if the containers are inaccurately introduced into the pallet, good centering becomes possible since the projections can yield somewhat and subsequently resume their previous position which effects centering. This avoids stoppage of the working sequence even if the machine runs inaccurately.
  • the height of the raised portions should be at least l5 percent of the height of the container introduced.
  • the height of the raised portions should be to 50 percent of the height of the containers to be introduced.
  • the shape of the projections is capable of extensive variation so long as the requirement of good centering of the entire stack is met.
  • the projections that is the raised and/or depressed portions, all to be of equal height and/or the same shape.
  • the pallet may possess stiffening portions between the projections, in order to make the pallet more resistant to twisting, above all if it is made in fairly low thicknesses.
  • the stiffening portions then simultaneously serve as spacing portions between the base of the pallet and the container which is to be introduced.
  • the pallet can, for example, be case or injection molded, the pallet is nevertheless particularly advantageously manufactured by the deep-drawing process.
  • a rectangular base section is preferably provided because of its greater simplicity in working with machinery.
  • a particular embodiment of the pallet has an interrupted or continuous peripheral rim, this rim preferably running perpendicular or almost perpendicular to the general plane of the pallet.
  • embossings and/or printing may be present in any flat portion and- /or projection and/or the rim.
  • a colored pallet obtainable by using colored, especially pigmented, material, for the manufacture of the pallet.
  • plastic material for the pallet provided it can be cast, injection-moulded or deep-drawn, the use of polystyrene or polyvinyl chloride or copolymers of the corresponding monomers is nevertheless preferred for the manufacture of the pallets.
  • FIG. 1 is a plan view of a pallet
  • FIG. 2 is a section on the line A B of FIG. 1,
  • FIG. 3 is a plan view of a second embodiment showing only two of the raised portions and FIG. 4 shows several pallets of identical shape in a stack of containers.
  • FIG. I shows a rectangular pallet with projections in the form of raised portions 2 between which are shown in broken lines the outlines of the bases of inserted containers 3. Round orifices 5 are provided in the raised portions 2. Stiffening portions 6 are provided between the raised portions.
  • the pallet has a peripheral rim 7.
  • FIG. 2 shows the pallet base 1 with the raised portions 2 and with depressed portions 4.
  • h is the height of the container and h, and h, the heights of the portions 2 and 4 respectively.
  • FIG. 3 shows a different form of the raised portions 2, again provided with orifices 5. For clarity, only two raised portions are shown.
  • FIG. 4 shows three pallets of identical shape in a regular stack of containers one layer on top of another.
  • a tray-like pallet made of stiff plastic material and suitable for use in setting up a stack of identical containers each having a top with an outline capable of providing support and different in area from the outline of the bottom thereof, said pallet having a generally planar base, a plurality of non-interconnected projection means on one face, between a number of which the base of each container of a series of containers, fonning a single tier of said stack, can be sufficiently confined to produce a stable stack, and having a plurality of projection means on the other face, between a number of which the top of each container of a series of containers, forming a lower tier of said stack can also be sufficiently confined to produce a stable stack, said projection means of said two faces being arranged with respect to one another in a manner such that the bottom of each of the upper containers in said stack and the cover of each of the underneath containers in said stack are in direct contact with said planar base of said pallet and that the bottoms and covers of the stacked containers are fully supported by said planar base and spaced from one another by the thickness of
  • a pallet as claimed in claim 1 for the support of containers with tapered sides diverging towards the top, in which pallet the projections intended to confine the bottoms of the containers are made of a height which is more than percent of the height of the container to be confined.
  • a pallet as claimed in claim 1 for the support of containers with tapered sides diverging towards the top, in which pallet the projections intended to confine the bottoms of the containers are made of a height which is more than to 50 percent of the height of the container to be confined.
  • a pallet as claimed in claim 2 in which the projections intended to confine the tops of the containers are 3 to 10 mm in height.
  • a pallet as claimed in claim ll including orifice means arranged for air passage between tiers of containers when in a stack thereof.
  • a pallet as claimed in claim 1 made from a sheet of plastic material by deep-drawing.
  • a pallet as claimed in claim 10 having a deepdrawing ratio of width height of any deformation produced by the deep-drawing operation of 5:1 to 1:5.
  • a pallet as claimed in claim 10 having a deepdrawing ratio of width height of any deformation produced by the deep-drawing operation of 2.5:] to 1:25
  • a pallet as claimed in claim 1 including a continuous or interrupted peripheral rim turned out of the general plane of the pallet.
  • a pallet as claimed in claim 1 made of polystyrene or polyvinyl chloride or a copolymer of the corresponding monomers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pallets (AREA)
  • Stackable Containers (AREA)
US00205640A 1970-12-09 1971-12-07 Plastic pallet Expired - Lifetime US3756429A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702060563 DE2060563A1 (de) 1970-12-09 1970-12-09 Stapelfaehige Kunststoffpalette

Publications (1)

Publication Number Publication Date
US3756429A true US3756429A (en) 1973-09-04

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ID=5790438

Family Applications (1)

Application Number Title Priority Date Filing Date
US00205640A Expired - Lifetime US3756429A (en) 1970-12-09 1971-12-07 Plastic pallet

Country Status (7)

Country Link
US (1) US3756429A (en:Method)
BE (1) BE776323A (en:Method)
CH (1) CH533551A (en:Method)
DE (1) DE2060563A1 (en:Method)
FR (1) FR2117934B1 (en:Method)
IT (1) IT945319B (en:Method)
NL (1) NL7116373A (en:Method)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917066A (en) * 1973-03-22 1975-11-04 Nosco Plastics Palletized load with compression frame
US4303157A (en) * 1980-01-10 1981-12-01 Edwards Fred S Shipping carton assembly for automobile taillight assemblies
US4789063A (en) * 1986-10-30 1988-12-06 International Container Systems, Inc. Spacer tray for packaging containers
US4896774A (en) * 1987-05-11 1990-01-30 International Container Systems Spacer tray for packaging containers
US4936075A (en) * 1983-08-04 1990-06-26 N. Z. Forest Products Limited Packaging
USD329931S (en) 1990-03-29 1992-09-29 Rehrig-Pacific Company, Inc. Outer wall structure for a nestable tray
JPH04506790A (ja) * 1990-05-06 1992-11-26 シェラー―プラスト・ソシエテ・アノニム 物体、特に缶を収容するための、プラスチック材料から製作された積み重ね可能な容器
US5184748A (en) * 1989-06-21 1993-02-09 Rehrig Pacific Company, Inc. Low-depth nestable tray for fluid containers
US5230601A (en) * 1988-11-15 1993-07-27 Rehrig-Pacific Company, Inc. Method for stacking trays
USD340446S (en) 1991-07-19 1993-10-19 Dalesandro Michael R Automobile battery storage rack
US5267649A (en) * 1988-11-15 1993-12-07 Rehrig Pacific Co., Inc. Nestable tray for cylindrical containers
US5277316A (en) * 1988-11-15 1994-01-11 Rehrig-Pacific Company, Inc. Low-depth stackable can tray
US5316172A (en) * 1988-11-15 1994-05-31 Rehrig-Pacific Company, Inc. Can tray assembly
AT398417B (de) * 1992-09-30 1994-12-27 Seebach Metallwaren Platte zum halten von nebeneinander stehenden stapeln aus behältern
US5575390A (en) * 1988-11-15 1996-11-19 Rehrig Pacific Company Nestable and stackable tray for cans or the like
US20110011033A1 (en) * 2008-06-25 2011-01-20 Weder Donald E Method of transporting preformed flower pot covers
US20120107469A1 (en) * 2010-10-29 2012-05-03 Lenny Sands System and method for enhanced preparation and storage of homemade baby food
US20140174976A1 (en) * 2012-12-21 2014-06-26 K. Hartwall Oy Ab Tray for carton packages
US20170057678A1 (en) * 2014-05-08 2017-03-02 Technische Universität Dresden Method and Device for Producing Molded Parts from a Continuous Fiber-Material Sheet
WO2022183004A1 (en) * 2021-02-26 2022-09-01 Silo Farms, Llc Mushroom growing system and method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457230A1 (fr) * 1979-05-23 1980-12-19 Allibert Exploitation Plateau intercalaire pour palette, bac ou autre conteneur a bouteilles
NL8300620A (nl) * 1983-02-18 1984-09-17 Molenaars Betonindustrie Bv Verpakking bevattende een aantal betonkegels en werkwijze en inrichting voor de vervaardiging van een dergelijke verpakking.
DE3310811A1 (de) * 1983-03-24 1984-09-27 Siemens AG, 1000 Berlin und 8000 München Transportpalette
US5695060A (en) * 1993-08-25 1997-12-09 Schoeller-Plast Sa Tray for receiving containers, in particular yogurt cups
ES2095776T3 (es) * 1993-08-25 1997-02-16 Schoeller Plast Ag Bandeja para el alojamiento de recipientes, en particular envases de yogur.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA645857A (en) * 1962-07-31 Keyes Fibre Company De-nestable molded pulp trays
US3250564A (en) * 1960-02-02 1966-05-10 Jones & Co Inc R A Display carrier
US3351264A (en) * 1965-10-04 1967-11-07 Illinois Tool Works Packaging device
GB1130812A (en) * 1966-02-28 1968-10-16 Hartmann As Brdr Cast or pressed plate for use in connection with the packing of cups

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA645857A (en) * 1962-07-31 Keyes Fibre Company De-nestable molded pulp trays
US3250564A (en) * 1960-02-02 1966-05-10 Jones & Co Inc R A Display carrier
US3351264A (en) * 1965-10-04 1967-11-07 Illinois Tool Works Packaging device
GB1130812A (en) * 1966-02-28 1968-10-16 Hartmann As Brdr Cast or pressed plate for use in connection with the packing of cups

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917066A (en) * 1973-03-22 1975-11-04 Nosco Plastics Palletized load with compression frame
US4303157A (en) * 1980-01-10 1981-12-01 Edwards Fred S Shipping carton assembly for automobile taillight assemblies
US4936075A (en) * 1983-08-04 1990-06-26 N. Z. Forest Products Limited Packaging
US4789063A (en) * 1986-10-30 1988-12-06 International Container Systems, Inc. Spacer tray for packaging containers
US4896774A (en) * 1987-05-11 1990-01-30 International Container Systems Spacer tray for packaging containers
US5316172A (en) * 1988-11-15 1994-05-31 Rehrig-Pacific Company, Inc. Can tray assembly
US5230601A (en) * 1988-11-15 1993-07-27 Rehrig-Pacific Company, Inc. Method for stacking trays
US5575390A (en) * 1988-11-15 1996-11-19 Rehrig Pacific Company Nestable and stackable tray for cans or the like
US5267649A (en) * 1988-11-15 1993-12-07 Rehrig Pacific Co., Inc. Nestable tray for cylindrical containers
US5277316A (en) * 1988-11-15 1994-01-11 Rehrig-Pacific Company, Inc. Low-depth stackable can tray
US5285899A (en) * 1988-11-15 1994-02-15 Rehrig-Pacific Company, Inc. Stackable can tray systems
US5184748A (en) * 1989-06-21 1993-02-09 Rehrig Pacific Company, Inc. Low-depth nestable tray for fluid containers
USD329931S (en) 1990-03-29 1992-09-29 Rehrig-Pacific Company, Inc. Outer wall structure for a nestable tray
JPH04506790A (ja) * 1990-05-06 1992-11-26 シェラー―プラスト・ソシエテ・アノニム 物体、特に缶を収容するための、プラスチック材料から製作された積み重ね可能な容器
USD340446S (en) 1991-07-19 1993-10-19 Dalesandro Michael R Automobile battery storage rack
AT398417B (de) * 1992-09-30 1994-12-27 Seebach Metallwaren Platte zum halten von nebeneinander stehenden stapeln aus behältern
US20110011033A1 (en) * 2008-06-25 2011-01-20 Weder Donald E Method of transporting preformed flower pot covers
US20140260093A1 (en) * 2008-06-25 2014-09-18 Wanda Weder & William Straeter, not individually but solely as Trustees of The Family Trust U/T/A Method of transporting preformed flower pot covers
US20120107469A1 (en) * 2010-10-29 2012-05-03 Lenny Sands System and method for enhanced preparation and storage of homemade baby food
US8985843B2 (en) * 2010-10-29 2015-03-24 Baby Bullet, LLC System and method for enhanced preparation and storage of homemade baby food
US20140174976A1 (en) * 2012-12-21 2014-06-26 K. Hartwall Oy Ab Tray for carton packages
US20170057678A1 (en) * 2014-05-08 2017-03-02 Technische Universität Dresden Method and Device for Producing Molded Parts from a Continuous Fiber-Material Sheet
WO2022183004A1 (en) * 2021-02-26 2022-09-01 Silo Farms, Llc Mushroom growing system and method
US20240122130A1 (en) * 2021-02-26 2024-04-18 Silo Farms, Llc Mushroom growing system and method

Also Published As

Publication number Publication date
BE776323A (fr) 1972-06-06
FR2117934B1 (en:Method) 1974-08-23
IT945319B (it) 1973-05-10
DE2060563A1 (de) 1972-06-22
CH533551A (de) 1973-02-15
NL7116373A (en:Method) 1972-06-13
FR2117934A1 (en:Method) 1972-07-28

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