Patent US3776145A successfully refreshed from Google Patents.
US3776145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip pallet
Assignee: COLORADO NATIONAL BANK OF DENVER
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Filing: 1972-03-27
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Granted: 1973-12-04
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Expires: 1992-03-27
Abstract
Abstract A slip pallet formed as a square or rectangular sheet of a synthetic resin of selected types of polyolefin. The sheet is proportioned to fit upon a platen lift and includes tabs at each edge to be gripped when the platen is thrust underneath the sheet or the sheet is pulled upon or pushed off from the platen. The slip pallet will ordinarily carry loads of boxes formed as interlocking layers and an important feature of the invention resides in providing a sheet having a greater coefficient of friction at the upper surface whereon the boxes are placed, than at the undersurface which is contacted by the platen.
Inventors
- 👤 R Anderson
- 👤 R Mackes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:57
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/19; B66F9/195; B65; B65D; B65D19/00; B65D19/36; Y; Y10; Y10S; Y10S108/00; Y10S108/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A slip pallet for holding a load of cardboard boxes, or the like, and carried by a platen which slides underneath the slip pallet and its box load for loading and unloading the same onto and off from the platen, said pallet comprising: the platen, said pallet comprising: a tough, pliable sheet of single thickness of synthetic thermoplastic resin having a thickness in the range of approximately 20 to 125 mils; a central area whereon the box load is placed; a tab means alongside at least one edge of this central area folded upwardly along the edge of the central area to be gripped and held whenever the platen is moving underneath the pallet from the tab side; and a modified upper surface at the central area adapted to enhance the contact thereof with the cardboard surfaces of the box load upon the pallet sufficient to increase the static frictional resistance between the box load and the pallet to a degree which exceeds the sliding frictional resistance between the pallet and the platen.
Claim 2
Dependent Claim
173 words
A slip pallet for holding a load of cardboard boxes, or the like, and carried by a platen which slides underneath the slip pallet and its box load for loading and unloading the same onto and off from the platen, said pallet comprising: the platen, said pallet comprising: a tough, pliable sheet of single thickness of synthetic thermoplastic resin having a thickness in the range of approximately 20 to 125 mils; a central area whereon the box load is placed; a tab means alongside at least one edge of this central area folded upwardly along the edge of the central area to be gripped and held whenever the platen is moving underneath the pallet from the tab side; and a modified upper surface at the central area adapted to enhance the contact thereof with the cardboard surfaces of the box load upon the pallet sufficient to increase the static frictional resistance between the box load and the pallet to a degree which exceeds the sliding frictional resistance between the pallet and the platen.
Claim 3
Dependent Claim
39 words
The slip pallet defined in claim 1, wherein: said thermoplastic resin is a polyolefin resin characterized by a tensile strength in the range of 2,500 to 4,500 psi and a vicat softening point temperature in excess of 250* F.
Claim 4
Dependent Claim
53 words
The slip pallet defined in claim 2, wherein: the said modified upper surface is a texture having a roughness such that the coefficient of static friction between the box load and upper surface exceeds the sliding coefficient of friction between the platen and the undersurface of the slip pallet by at least 0.15.
Claim 5
Dependent Claim
56 words
The slip pallet defined in claim 1, wherein said sheet is a laminate consisting of an upper layer and a lower layer of different synthetic thermoplastic resin materials as a unitary sheet with the material of the upper layer, forming said modified surface, having a natural frictional resistance significantly greater than that of the lower layer.
Claim 6
Dependent Claim
35 words
The slip pallet defined in claim 1, wherein: said sheet is a laminate consisting of an upper layer of fibrous absorbant material and a lower layer of synthetic thermoplastic resin material as a unitary sheet.
Claim 7
Dependent Claim
19 words
The slip pallet defined in claim 2, wherein: the upward tab fold includes a permanent crease at the fold.
Claim 8
Dependent Claim
25 words
The slip pallet defined in claim 2 wherein the thermoplastic resin is polypropylene and the upward tab fold includes a permanent crease at the fold.
Claim 9
Dependent Claim
96 words
The slip pallet according to claim 7 wherein the said modified upper surface is produced by a texture having a roughness not less than approximately 60 Micro-inches, the undersurface of the central area is modified by texturing the same to produce a toughness of not over approximately 30 micro-inches, but sufficient to permit air to be present between the pallet and the platen and the coefficient of static friction between the box load and upper surface exceeds the sliding coefficient of friction between the platen and the undersurface of the slip pallet by at least 0.15.
Claim 10
Dependent Claim
44 words
A slip pallet according to claim 1 wherein when in use the coefficient of static friction between the box load and the upper surface exceeds the sliding coefficient of friction between the platen and the under surface of the pallet by at least 0.15.
Claim 11
Dependent Claim
64 words
A combination of the slip pallet of claim 1 with its upper surface supporting a load of cardboard boxes, or the like, and its lower surface being on a platen, and the coefficient of static friction between the box load and the upper surface exceeding the sliding coefficient of friction between the platen and the under surface of the pallet by at least 0.15.
References Cited (Backward Citations)
US2328397A
Cited
US2593998A
Cited
US3351264A
Cited
US3369676A
Cited
US3490583A
Cited
US3527344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |