Patent US5879495A successfully refreshed from Google Patents.
US5879495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PVC pallets and the like
Assignee: Composite Pallet LLC
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Filing: 1997-12-23
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Granted: 1999-03-09
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Expires: 2017-12-23
Abstract
Abstract A PVC pallet or crate is disclosed, wherein the pallet is made from PVC structural products such as hollow, extruded PVC profiles. The profiles are bonded together using an adhesive. The profiles are preferably surface treated before bonding to enhance the strength of the bond. The PVC structural products preferably incorporate an acrylic polymer impact modifier in a certain amount to greatly increase the toughness of the structural product. The adhesive is preferably a hot-melt moisture-cure polyurethane adhesive. The surface treatment is preferably achieved by plasma treating or flame treatment. A method for making PVC pallets or crates is also disclosed.
Inventors
- 👤 Daniel W. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:31
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/70; B29C66/71; B29C65/00; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C65/483; B29C65/484; B29C66/01; B29C66/02; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/72; B29C66/725; B29C66/7252; B29C66/72523; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B65; B65D; B65D19/00; B65D19/0004; B65D19/0053; B65D19/0077; B65D19/0089; B65D19/0091; B65D19/02; B65D19/06; B65D19/18; B29C66/022; B29C66/0224; B29C66/02245; B29C66/028; B29C66/40; B29C66/41; B29C66/43; B29C66/434; B29C66/4342; B29C66/43421; B29C66/524; B29C66/721; B29C66/7212; B29L; B29L2031/00; B29L2031/712; B29L2031/7178; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00034; B65D2519/00049; B65D2519/00069; B65D2519/00079; B65D2519/00084; B65D2519/00104; B65D2519/00114; B65D2519/00119; B65D2519/00149; B65D2519/00154; B65D2519/00184; B65D2519/00189; B65D2519/00218; B65D2519/00223; B65D2519/00253; B65D2519/00258; B65D2519/00263; B65D2519/00273; B65D2519/00283; B65D2519/00288; B65D2519/00293; B65D2519/00298; B65D2519/00313; B65D2519/00318; B65D2519/00323; B65D2519/00328; B65D2519/00333; B65D2519/00348; B65D2519/00368; B65D2519/00373; B65D2519/00492; B65D2519/00502; B65D2519/00547; B65D2519/00552; B65D2519/00557; B65D2519/00562; B65D2519/00577; B65D2519/00631; B65D2519/00636; B65D2519/00666; B65D2519/00671; B65D2519/00701; B65D2519/00706; B65D2519/00716; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
A method of making a PVC pallet or crate comprising the steps of: a) providing a plurality of PVC support members; b) pretreating the support members and cross members by performing one or more of the group consisting of flame treatment, corona discharge, solvent wiping, abrading, coating with a primer, plasma treatment and electrical etching; c) arranging the support members in parallel, spaced relation, with a top surface on each support member facing substantially upward; d) applying a bonding agent to each of said support members on the top surface thereof, said bonding agent selected from one or more of the group consisting of hot-melt moisture-cure polyurethane adhesives, polyester adhesives, epoxies, cyanoacrylate adhesives, polyurethane adhesives, ethyl methyl acrylate adhesives, ethyl vinyl acetate adhesives, hot-melt adhesives and thermoplastic elastomer adhesives; e) providing at least one PVC cross member; and f) transversely positioning said cross member on the top surface of said support members so as to sandwich said bonding agent therebetween.
Claim 2
Independent Claim
160 words
A method of making a PVC pallet or crate comprising the steps of: a) providing a plurality of PVC support members; b) pretreating the support members and cross members by performing one or more of the group consisting of flame treatment, corona discharge, solvent wiping, abrading, coating with a primer, plasma treatment and electrical etching; c) arranging the support members in parallel, spaced relation, with a top surface on each support member facing substantially upward; d) applying a bonding agent to each of said support members on the top surface thereof, said bonding agent selected from one or more of the group consisting of hot-melt moisture-cure polyurethane adhesives, polyester adhesives, epoxies, cyanoacrylate adhesives, polyurethane adhesives, ethyl methyl acrylate adhesives, ethyl vinyl acetate adhesives, hot-melt adhesives and thermoplastic elastomer adhesives; e) providing at least one PVC cross member; and f) transversely positioning said cross member on the top surface of said support members so as to sandwich said bonding agent therebetween.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein said method is carried out under an ambient temperature in the range of about 60° F. to about 100° F. and under ambient relative humidity of about 40% to about 85%.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the surface temperature of the PVC support members and cross members is greater than 60° F.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the temperature of said bonding agent when applied is between 275° F. and 375° F.
Claim 6
Dependent Claim
37 words
The method of claim 1 including in step a) the steps of extruding said support members and cross members so that they are hollow with quadrangular cross-sections, and cutting the support members and cross members to length.
Claim 7
Dependent Claim
35 words
The method of claim 5 including in step a) the step of extruding one or more of the support members and cross members so as to provide them with at least one internal reinforcing rib.
Claim 8
Dependent Claim
20 words
The method of claim 1 wherein in step d) said bonding agent is applied in the form of a bead.
References Cited (Backward Citations)
US2520959A
Cited
US3026289A
Cited
US3242234A
Cited
US3100917A
Cited
US3145190A
Cited
US3567669A
Cited
US3603272A
Cited
US3907934A
Cited
US3581681A
Cited
US3833686A
Cited
US3613605A
Cited
US3636888A
Cited
US3628468A
Cited
US3680496A
Cited
US3667403A
Cited
US3719157A
Cited
US3938448A
Cited
US3710733A
Cited
US3814031A
Cited
US3951078A
Cited
US3966529A
Cited
US3996173A
Cited
US3878796A
Cited
US4007694A
Cited
US4230049A
Cited
US4467728A
Cited
US4443585A
Cited
US4513108A
Cited
US4668740A
Cited
US4714650A
Cited
US4940747A
Cited
US4775719A
Cited
US4808255A
Cited
US5042397A
Cited
US4871406A
Cited
US5106564A
Cited
US4809618A
Cited
EP0426619A2
Cited
US5441808A
Cited
US5185404A
Cited
US5114510A
Cited
US5425825A
Cited
US5456189A
Cited
US5492069A
Cited
US5585054A
Cited
US5776281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-08 | 2002-09-07 | 2003-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-08 | 2006-09-07 | 2007-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-08 | 2010-09-07 | 2011-03-09 | $7700.00 | Window Closed / Lapsed |