US4233098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making metal-plastic ski
Assignee: Laminoirs A Froid de Thionville
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Filing: 1978-03-24
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Granted: 1980-11-11
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Expires: 1998-03-24
Abstract
Abstract A process of making a metal-plastic ski by cold gluing on a core of plastic material, upper and lower laminated structures. The laminated structures which form the upper and lower portions of the ski are each previously formed by "Coil-Coating" and have inner surfaces with a thin coating of a material with excellent glue adhesion characteristics. The upper surface of the upper structure is precoated with a thicker layer of plastic material which forms the upper surface of the ski, and the lower surface of the lower structure is precoated with plastic material which forms the sliding bottom surface of the ski.
Inventors
- 👤 Daniel Urbain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:35
CPC Classifications
A; A63; A63C; A63C5/00; A63C5/04; A63C5/056; A63C5/12; A63C5/124; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
293 words
A process for fabricating a metal plastic ski including a plastic core between a top metallic structure and a bottom metallic structure, said process comprising the steps of forming a core for the ski by molding a thermoplastic material soluble in a solvent, said core having a shallow top recess and a shallow bottom recess for nesting respectively the top and bottom metallic structures of the ski; obtaining a first semi-finished metal laminate sheet having a high elastic limit and precoated with an organic coating on each surface thereof by a continuous coating process during which said sheet is cleaned, chemically treated, coated on one surface with a protective coating constituting the upper covering of the ski, coated on its other surface with an intermediary gluing layer of a substance soluble in at least said solvent and said coatings are cured; obtaining a second semi-finished metal laminate sheet having a high elastic limit and precoated with an organic coating on each surface thereof by a continuous coating process during which said second sheet is cleaned, chemically treated, coated on one surface with a material constituting the runner surface of the ski, coated on its other surface with an intermediary layer of a substance soluble in at least said solvent, and said coatings are cured; cutting said first and second semi-finished metal laminates to predetermined profiles, similar respectively to profiles of said top and bottom recesses, to form said top and bottom metallic structures of the ski; applying to said intermediary gluing layers of said top and bottom structures a cold glue comprising at least said solvent; and nesting said top and bottom structures in said top and bottom recesses of said core and pressing said structures against said core to form a ski.
Claim 2
Dependent Claim
293 words
A process for fabricating a metal plastic ski including a plastic core between a top metallic structure and a bottom metallic structure, said process comprising the steps of forming a core for the ski by molding a thermoplastic material soluble in a solvent, said core having a shallow top recess and a shallow bottom recess for nesting respectively the top and bottom metallic structures of the ski; obtaining a first semi-finished metal laminate sheet having a high elastic limit and precoated with an organic coating on each surface thereof by a continuous coating process during which said sheet is cleaned, chemically treated, coated on one surface with a protective coating constituting the upper covering of the ski, coated on its other surface with an intermediary gluing layer of a substance soluble in at least said solvent and said coatings are cured; obtaining a second semi-finished metal laminate sheet having a high elastic limit and precoated with an organic coating on each surface thereof by a continuous coating process during which said second sheet is cleaned, chemically treated, coated on one surface with a material constituting the runner surface of the ski, coated on its other surface with an intermediary layer of a substance soluble in at least said solvent, and said coatings are cured; cutting said first and second semi-finished metal laminates to predetermined profiles, similar respectively to profiles of said top and bottom recesses, to form said top and bottom metallic structures of the ski; applying to said intermediary gluing layers of said top and bottom structures a cold glue comprising at least said solvent; and nesting said top and bottom structures in said top and bottom recesses of said core and pressing said structures against said core to form a ski.
Claim 3
Dependent Claim
73 words
A process according to claim 1 wherein said step of obtaining said sheets comprises selecting a first sheet of a predetermined thickness, selecting a second sheet of a predetermined thickness, and assembling said ski said assembling including securing ski edges to said core, said thicknesses cooperating with said ski edges to provide a neutral fiber in the core of the ski at a distance closer to the bottom structure than the upper structure.
Claim 4
Dependent Claim
35 words
A process according to claim 1, wherein said material of the second semi-finished metal laminate constituting the runner surface of the ski, comprises a thick sheet of grafted polyethylene hot laminated onto said second sheet.
Claim 5
Dependent Claim
107 words
A process according to claim 1 wherein said step of obtaining the first metal sheet comprises selecting a sheet of tempered carbon steel coated on both sides with ABS plastic, said step of obtaining said second metal sheet comprises selecting a sheet of steel of comparable thickness with the first sheet and coated on one surface with a thin layer of ABS constituting said intermediary gluing layer, and coated on the other surface with a layer of grafted polyethylene, said step of forming said core comprises injection molding said core from ABS plastic, and said step of cold gluing comprises cold gluing with an ABS plastic glue.
Claim 6
Dependent Claim
82 words
A process according to claim 1 wherein said step of forming said core comprises, forming a core with shallow lower grooves and securing metallic ski edge strips in said grooves to form said shallow bottom recess of said core, said step of securing comprising coating said ski edge strips with an intermediary gluing layer of a substance soluble in at least said solvent, and nesting said strips in said grooves before the step of nesting said bottom structure in said bottom recess.
Claim 7
Dependent Claim
42 words
A process according to claim 5, wherein said thermoplastic material for molding the core, and said substance of said intermediary gluing layers of said first and second semi-finished laminates and of said ski edge strips are made from the same base material.
Claim 8
Dependent Claim
21 words
A process according to claim 6, wherein said base material is ABS plastic, and said solvent is a solvent for ABS.
Claim 9
Dependent Claim
34 words
A process according to claim 7, wherein said steps of obtaining said first and second metal laminates comprise, selecting two sheets of a tempered carbon steel of high elastic limit of 3-5/10 mm thickness.
Claim 10
Dependent Claim
32 words
A process according to claim 7, wherein said steps of obtaining said first and second metal laminates comprise, selecting two sheets of aluminum alloy of high elastic limit of 5-10/10 mm thickness.
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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |