Patent US4397247A successfully refreshed from Google Patents.
US4397247A
Expired / Lapsed
US
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Molding system and article
Assignee: Individual
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Filing: 1981-08-25
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Granted: 1983-08-09
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Expires: 2001-08-25
Abstract
Abstract A molding system for molding hollow bodies and an article, such as a pallet, produced by means of such system. In a preferred form, the pallet is a rectangular parallelepiped hollow molding and is specifically shaped during molding, to be substantially stiffened by means of its shape and to receive and support one or more blades of a lifting and handling device. In one form, one or more stiffening members extend across the hollow molding and are retained therein as a result of having the molding material molded about the stiffening members. In another form, two stiffening members are provided, each extending along a respective border portion of the hollow molding parallel to the other stiffening member. The invention is also concerned with a method for molding large hollow bodies by means of a fast setting resin which is premixed just before it is introduced into a mold.
Inventors
- 👤 Jerome H. Lemelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:26
CPC Classifications
B; B65; B65D; B65D19/00; B65D19/0004; B65D19/0006; B65D19/0008; B65D19/001; B65D19/0012; B29; B29C; B29C41/00; B29C41/02; B29C41/025; B29C41/04; B29C41/06; B29C41/34; B29C41/36; B29C41/52; B29K; B29K2503/00; B29K2503/04; B29K2503/08; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00034; B65D2519/00049; B65D2519/00069; B65D2519/00258; B65D2519/00263; B65D2519/00268; B65D2519/00283; B65D2519/00288; B65D2519/00313; B65D2519/00318; B65D2519/00328; B65D2519/00343; B65D2519/00398; B65D2519/00432; Y; Y10; Y10S; Y10S108/00; Y10S108/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
192 words
A plastic pallet formed by molding comprising: a slab-like rotationally molded plastic pallet structure formed into a rectangular parallelepiped self-supporting single-piece hollow body having planer major top and bottom wall portions and end wall portions, a plurality of cavities defined by respective indented wall portions molded in said top and bottom wall portions, at least certain of the cavities formed in the top wall portion of said hollow body being aligned with respective cavities formed in the bottom wall portion, the aligned cavities having a common wall defining the bottom wall of each cavity such that the top and bottom walls of said enclosure are integrally joined together near the center of the pallet to provide mutual support and stiffness to said top and bottom wall portions, there being at least two partitions extending parallel to each other between the top and bottom wall portions and joining said top and bottom wall portions of said pallet, said partitions defining at least one passageway between opposite end walls of said pallet, there being openings in the opposite end walls of said rectangular hollow body between said partitions for receiving blades of handling devices.
Claim 2
Dependent Claim
192 words
A plastic pallet formed by molding comprising: a slab-like rotationally molded plastic pallet structure formed into a rectangular parallelepiped self-supporting single-piece hollow body having planer major top and bottom wall portions and end wall portions, a plurality of cavities defined by respective indented wall portions molded in said top and bottom wall portions, at least certain of the cavities formed in the top wall portion of said hollow body being aligned with respective cavities formed in the bottom wall portion, the aligned cavities having a common wall defining the bottom wall of each cavity such that the top and bottom walls of said enclosure are integrally joined together near the center of the pallet to provide mutual support and stiffness to said top and bottom wall portions, there being at least two partitions extending parallel to each other between the top and bottom wall portions and joining said top and bottom wall portions of said pallet, said partitions defining at least one passageway between opposite end walls of said pallet, there being openings in the opposite end walls of said rectangular hollow body between said partitions for receiving blades of handling devices.
Claim 3
Dependent Claim
96 words
A plastic pallet in accordance with claim 1, there being at least four parallelly extending space separated partitions formed between said top and bottom wall portions of said hollow body and attached to the opposite end walls thereof so as to define two parallel passageways extending between said opposite end walls and openings in each of said opposite end walls between respective pairs of said partitions permitting the blades of a forklift to be passed through said openings into the volumes defined between said partitions for handling and lifting said pallet by means of said forklift.
Claim 4
Dependent Claim
29 words
A pallet in accordance with claim 2, further including at least one stiffening member extending across said hollow molding and retained in place by plastic material defining said molding.
Claim 5
Dependent Claim
38 words
A pallet in accordance with claim 3 wherein the stiffening member comprises a rigid plastic material molded in situ within a closed passageway which passageway is formed of portions of the plastic forming the self supporting hollow body.
Claim 6
Dependent Claim
31 words
A pallet in accordance with claim 3 wherein said stiffening member extends between and is attached to the opposite end wall portions of said pallet by plastic material defining said molding.
Claim 7
Dependent Claim
29 words
A pallet in accordance with claim 3 including a plurality of stiffening members extending adjacent opposite border portions of said hollow molding between the opposite end wall portions thereof.
Claim 8
Dependent Claim
14 words
A pallet in accordance with claim 6, said stiffening members comprising respective wooden planks.
Claim 9
Dependent Claim
50 words
A pallet in accordance with claim 2 including at least one indentation formed in one of the major walls of the pallet in alignment with a wall portion thereof disposed between said partitions so as to predetermine the space between the opposite walls of the hollow molding and the partitions.
Claim 10
Dependent Claim
35 words
A pallet in accordance with claim 1 formed by rotational molding and having a plurality of stiffening members secured within the hollow molding by plastic material molded over and around portions of the stiffening members.
Claim 11
Dependent Claim
91 words
A pallet in accordance with claim 1 having four partitions extending parallel to each other and defining two passageways between opposite end walls of said pallet, each of said two passageways containing at least two cavities formed in each of the top and bottom wall portions thereof and a plurality of additional cavities formed in each of the top and bottom wall portions of said pallet extending lateral of the exterior partitions defining said passageways to stiffen and support the top and bottom walls of the pallet lateral of said passageways.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |