US6786992B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a dunnage platform
Assignee: Airdex Corp
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Filing: 2002-06-11
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Granted: 2004-09-07
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Expires: 2022-06-11
Abstract
Abstract A dunnage platform is in the general shape of a rectangular slab with legs extending form one side. The dunnage platform is made from an expanded polystyrene core. A chemical combination process is used to chemically combine portion of the core proximal to its surface with high impact polystyrene. In a first of two parts of the combination process, the core is placed in a forming mold with one of its two sides and two thirds of its thickness extending therefrom. A heated sheet of high impact polystyrene is brought into contact with the portion of the core extending from the mold. In a similar manner, the other of the two sides of the core is made to extend from the forming mold for contact with a heated sheet of high impact polystyrene.
Inventors
- 👤 Laurence W. Dummett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:34
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/569; B32; B32B; B32B37/00; B32B37/14; B32B37/16; B32B37/18; B32B37/182; B32B37/185; B29C51/00; B29C51/12; B29C51/16; B32B38/00; B32B38/0036; B65; B65D; B65D19/00; B65D19/0004; B65D19/0006; B65D19/0008; B65D19/001; B65D19/0012; B65D19/0014; B65D19/0018; C; C08; C08J; C08J9/00; C08J9/36; C08J9/365; B29C2791/00; B29C2791/004; B29C2791/006; B29C51/08; B29C51/10; B29K; B29K2025/00; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/712; B29L2031/7178; B32B2553/00; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00034; B65D2519/00044; B65D2519/00049; B65D2519/00069; B65D2519/00079; B65D2519/00258; B65D2519/00263; B65D2519/00268; B65D2519/00283; B65D2519/00288; B65D2519/00313; B65D2519/00318; B65D2519/00328; B65D2519/00338; B65D2519/00398; B65D2519/00462; B65D2519/00547; B65D2519/00552; B65D2519/00557; B65D2519/00736; B65D2519/0086; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; C08J2425/00; Y; Y10; Y10S; Y10S108/00; Y10S108/901; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1011; Y10T156/1028; Y10T156/103; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/23; Y10T428/233; Y10T428/239; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
203 words
In the method of making a dunnage platform comprising the steps of: providing a core made from expanded polystyrene in the general shape of a rectangular slab with one side having a plurality of legs extending therefrom; providing first and second high impact polystyrene sheets; providing a forming mold with an interior that is complimentary to a shape outlined by an edge of said core; retaining said core within said mold with a first side of said core and at least half the thickness of said core extending therefrom; heating said first sheet to a temperature in a range of 293° F. to 375° F.; placing said heated first sheet onto portions of said core that extend from said mold, thereby forming strengthened polystyrene proximal to the surface of said first side and proximal to a surface of at least half of the edge of said core; retaining said core within said mold with a second side of said core and at least half the thickness of said core extending therefrom; heating said second sheet to a temperature in a range of 293° F. to 375° F.; and placing said heated second sheet onto portions of said core that extend from said mold.
Claim 2
Dependent Claim
203 words
In the method of making a dunnage platform comprising the steps of: providing a core made from expanded polystyrene in the general shape of a rectangular slab with one side having a plurality of legs extending therefrom; providing first and second high impact polystyrene sheets; providing a forming mold with an interior that is complimentary to a shape outlined by an edge of said core; retaining said core within said mold with a first side of said core and at least half the thickness of said core extending therefrom; heating said first sheet to a temperature in a range of 293° F. to 375° F.; placing said heated first sheet onto portions of said core that extend from said mold, thereby forming strengthened polystyrene proximal to the surface of said first side and proximal to a surface of at least half of the edge of said core; retaining said core within said mold with a second side of said core and at least half the thickness of said core extending therefrom; heating said second sheet to a temperature in a range of 293° F. to 375° F.; and placing said heated second sheet onto portions of said core that extend from said mold.
Claim 3
Dependent Claim
44 words
In the method of claim 1 wherein said step of placing said heated first sheet onto portions of said core includes the additional steps of: providing a vacuum pump; and connecting said vacuum pump to pump air from said second side of said core.
Claim 4
Dependent Claim
26 words
In the method of claim 1 , the additional steps of drilling one or more holes through said strengthened polystyrene prior to heating said second sheet.
Claim 5
Dependent Claim
36 words
In the method of claim 3 wherein said step of placing said heated second sheet includes the additional steps of: providing a vacuum pump; and connecting said vacuum pump to pump air from said drilled hole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-09-07 | 2008-03-08 | 2008-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-09-07 | 2012-03-08 | 2012-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-09-07 | 2016-03-08 | 2016-09-07 | $7700.00 | Window Closed / Lapsed |