Patent EP0798220A1 successfully refreshed from Google Patents.
EP0798220A1
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EP
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Plastic pallet
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1997-03-27
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Granted: —
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Expires: 2017-03-27
Abstract
Abstract A plastic pallet comprises a pair of deck boards (12, 14) opposed to each other in parallel with each other, a pair of outer girder portions (16, 18) respectively disposed at a pair of opposite side portions of the deck boards, an inner girder portion (26, 28) placed midway between the outer girder portions, and a plurality of reinforcement ribs disposed on respective inner surfaces of said deck boards. Each of the outer girder portions includes a side wall and a first partition wall disposed between the deck boards. The inner girder portion includes a pair of second partition walls which are disposed in parallel with each other with a predetermined distance. The reinforcement ribs existing within a range of a distance extending inward and outward from the first partition wall have a total weight greater than the total weight of the reinforcement ribs existing within a range of the distance extending outward and inward from the second partition wall. With this arrangement, a region around the partition wall of the outer girder portion to be particularly reinforced can be effectively reinforced without wastefully increasing the weight of the pallet.
Inventors
- 👤 Yoshiaki Togawa
- 👤 Toshitsugu Kikuchi
- 👤 Tohru Yabe
- 👤 Shinichi Nagaoka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 12:51
CPC Classifications
B; B65; B65D; B65D19/00; B65D19/38; B65D19/385; B65D19/0004; B65D19/0006; B65D19/0008; B65D19/001; B65D19/0012; B65D19/0053; B65D19/0055; B65D19/0067; B65D19/0069; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00034; B65D2519/00049; B65D2519/00069; B65D2519/00258; B65D2519/00263; B65D2519/00273; B65D2519/00283; B65D2519/00288; B65D2519/00303; B65D2519/00313; B65D2519/00318; B65D2519/00328; B65D2519/00343; B65D2519/00358; B65D2519/00363; B65D2519/00398; B65D2519/00402; B65D2519/00407; B65D2519/00412; B65D2519/00547; B65D2519/00552; B65D2519/00557; B65D2519/00736; B65D2519/00825; B65D2519/0083; B65D2519/0084; Y; Y10; Y10S; Y10S108/00; Y10S108/901
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
243 words
A plastic pallet comprising: a pair of deck boards opposed to each other in parallel with each other; a pair of outer girder portions respectively disposed at a pair of opposite side portions of said deck boards between said deck boards, each of said outer girder portions including a side wall disposed between associated side edges of said deck boards and a first partition wall disposed between said deck boards so as to oppose to said side wall in parallel therewith with a predetermined distance therebetween; an inner girder portion disposed between said deck boards so as to be placed midway between said outer girder portions, said inner girder portion including a pair of second partition walls which are disposed in parallel with each other with a predetermined distance therebetween and in parallel with said first partition wall; and a plurality of reinforcement ribs disposed on respective inner surfaces of said deck boards; wherein the reinforcement ribs existing in a first region in which the first partition wall is located have a total weight greater than the total weight of the reinforcement ribs existing in a second region in which the associated second partition wall is located, said first and second regions extending in parallel with said side walls and having the same width, and said first and second regions being symmetrical with each other in relation of a center axis extending between said first partition wall and said associated second partition wall.
Claim 2
Dependent Claim
53 words
A plastic pallet according to claim 1, whereby the first partition wall and portions of the deck boards adjacent to said first partition wall are reinforced more than the second partition wall and portions of the deck boards adjacent to said second partition wall such that flexural strength of said pallet is increased.
Claim 3
Dependent Claim
77 words
A plastic pallet according to claim 1 or 2, wherein said first region is defined by said first partition wall and a plane provided in parallel with said first partition wall and spaced inward from said first partition wall with a first distance, and said second region is defined by said second partition wall and a plane provided in parallel with said second partition wall and spaced outward from said second partition wall with said first distance.
Claim 4
Dependent Claim
32 words
A plastic pallet according to claim 3, wherein said first distance is approximately 1/3 of the distance (L 1 ) between said first partition wall and said second partition wall opposed thereto.
Claim 5
Dependent Claim
77 words
A plastic pallet according to claim 1 or 2, wherein said first region is defined by said first partition wall and a plane provided in parallel with said first partition wall and spaced outward from said first partition wall with a second distance, and said second region is defined by said second partition wall and a plane provided in parallel with said second partition wall and spaced inward from said second partition wall with said second distance.
Claim 6
Dependent Claim
55 words
A plastic pallet according to claim 5, wherein said second distance is approximately 1/3 of the shorter of the distance (L 2 ) between said side wall of the outer girder portion and said first partition wall and the distance (L 3 ) between said pair of second partition walls of the inner girder portion.
Claim 7
Dependent Claim
113 words
A plastic pallet according to claim 1 or 2, wherein said first region is defined by a plane provided in parallel with said first partition wall and spaced inward from said first partition wall with a first distance and a plane provided in parallel with said first partition wall and spaced outward from said first partition wall with a second distance, and said second region is defined by a plane provided in parallel with said second partition wall and spaced outward from said second partition wall with said first distance and a plane provided in parallel with said second partition wall and spaced inward from said second partition wall with said second distance.
Claim 8
Dependent Claim
81 words
A plastic pallet according to claim 7, wherein said first distance is approximately 1/3 of the distance (L 1 ) between said first partition wall and said second partition wall opposed thereto, and wherein said second distance is approximately 1/3 of the shorter of the distance (L 2 ) between said side wall of the outer girder portion and said first partition wall and the distance (L 3 ) between said pair of second partition walls of the inner girder portion.
Claim 9
Dependent Claim
104 words
A plastic pallet according to claim 7 or 8, wherein the reinforcement ribs existing within the range of the first distance extending inward from said first partition wall have a total weight greater than the total weight of the reinforcement ribs existing within the range of the first distance extending outward from said second partition wall, and wherein the reinforcement ribs existing within the range of the second distance extending outward from said first partition wall have a total weight greater than the total weight of the reinforcement ribs existing within the range of the second distance extending inward from said second partition wall.
Claim 10
Dependent Claim
81 words
A plastic pallet according to claim 9, wherein said first distance is approximately 1/3 of the distance (L 1 ) between said first partition wall and said second partition wall opposed thereto, and wherein said second distance is approximately 1/3 of the shorter of the distance (L 2 ) between said side wall of the outer girder portion and said first partition wall and the distance (L 3 ) between said pair of second partition walls of the inner girder portion.
Claim 11
Dependent Claim
39 words
A plastic apllet according to any of the preceding claims, wherein said reinforcement ribs include a plurality of longitudinal ribs extending in parallel with said side wall and a plurality of transverse ribs extending orthogonally to said longitudinal ribs.
Claim 12
Dependent Claim
39 words
A plastic pallet according to claim 11, wherein said transverse ribs disposed between said inner girder portion and outer girder portions have a greater thickness in a region adjacent to said first partition wall than in the other region.
Claim 13
Dependent Claim
41 words
A plastic pallet according to claim 11 or 12, wherein said transverse ribs disposed between said inner girder portion and outer girder portions have a greater height in a region adjacent to said first partition wall than in the other region.
Claim 14
Dependent Claim
35 words
A plastic pallet according to any of claims 11 to 13, wherein a greater number of the transverse ribs are disposed in a region adjacent to said first partition wall than in the other region.
Claim 15
Dependent Claim
37 words
A plastic pallet according to any of claims 11 to 14, wherein the transverse ribs in said outer girder portions are respectively aligned with the transverse ribs disposed between said inner girder portion and outer girder portions.
Claim 16
Dependent Claim
32 words
A plastic pallet according to any of the preceding claims, wherein said reinforcement ribs, side walls, and first and second partition walls have a thickness of about 2 to about 10 mm.
Claim 17
Dependent Claim
24 words
A plastic pallet according to any of the preceding claims, wherein said deck boards have a thickness of about 2.5 to about 4.5 mm.
Claim 18
Dependent Claim
35 words
A plastic pallet according to any of the preceding claims, wherein a plurality of drain holes are formed between said inner girder portion and outer girder portions in at least one of said deck boards.
Claim 19
Dependent Claim
32 words
A plastic pallet according to any of the preceding claims, wherein said pallet is constituted by halves having identical forms which are molded from a synthetic resin and then are joined together.
Claim 20
Dependent Claim
36 words
A plastic pallet according to claim 19, wherein said synthetic resin includes a thermoplastic resin selected from the group consisting of polyethylene resins, polypropylene resins, polyamides, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer (ABS), polyvinyl chloride resin, and polycarbonate.
Claim 21
Dependent Claim
62 words
A plastic pallet according to any of the preceding claims, further comprising a nonslip member provided on an outer surface of at least one of said deck boards, said nonslip member being made of a non-crosslinking thermoplastic elastomer composition containing 30 to 90 parts by weight of an ethylene-α-olefin copolymer rubber and 70 to 10 parts by weight of a polyolefin resin.
Claim 22
Dependent Claim
16 words
A plastic pallet according to claim 21, wherein the ethylene-α-olefin copolymer rubber is ethylene-propylene copolymer rubber.
Claim 23
Dependent Claim
17 words
A plastic pallet according to clam 21 or 22, wherein the polyolefin resin is a polypropylene resin.
Claim 24
Dependent Claim
31 words
A plastic pallet according to any of the preceding claims, further comprising a plurality of linear projections monolithically formed on an outer surface of at least one of said deck boards.
Claim 25
Dependent Claim
19 words
A plastic pallet according to claim 24, wherein said deck board has an opening ratio of 20% or less.
Claim 26
Dependent Claim
20 words
A plastic pallet according to claim 24 or 25, wherein said linear projections extend in parallel with said side wall.
Claim 27
Dependent Claim
17 words
A plastic pallet according to claim 24, wherein said linear projections extend orthogonally to said side wall.
Claim 28
Dependent Claim
39 words
A plastic pallet according to any of claims 24 to 27, wherein a center line of said deck board is free of said linear projections, said linear projections being disposed asymmetrically with respect to said center line interposed therebetween.
Claim 29
Dependent Claim
21 words
A plastic pallet according to any of claims 24 to 28, wherein comprising a nonslip member disposed between said linear projections.
Claim 30
Dependent Claim
42 words
A plastic pallet according to claim 29, wherein said nonslip member is made of a non-crosslinking thermoplastic elastomer composition containing 30 to 90 parts by weight of an ethylene-α-olefin copolymer rubber and 70 to 10 parts by weight of a polyolefin resin.
References Cited (Backward Citations)
US3938448A
Cited
FR2301444A1
Cited
FR2310277A1
Cited
US4397246A
Cited
JPS58102723A
Cited
JPH0272048A
Cited
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