Ski having a hard type foamed resin core

Claim 2

A ski of a laminated construction comprising: a core body of a hard type plastic foam conforming substantially to the shape of the ski; and a screw-holding framework embedded in said core body, said framework having two portions longitudinally extended along a substantial length of the ski and serving for firmly seizing screws attaching steel edges to the ski wherein said two portions are provided with rising-up wall portions respectively at their lAterally outward edges, and the height of the rising-up wall portions conform with the thickness distribution of the ski along its length, and a central portion serving for firmly seizing screws attaching a shoe clamping device to the ski.

Claim 3

A ski as defined in claim 1 wherein said framework is moulded of a synthetic resin so as to form said two portions and said central portion in an integral manner.

Claim 4

A ski as defined in claim 1 wherein said two portions are so constructed that the distance between the both outward edges thereof is varied in accordance with the lateral width of the ski along its length.

Claim 5

A ski as defined in claim 1 wherein said central portion serving for firmly seizing screws attaching a shoe clamping device to the ski has a height conforming to the thickness distribution of the ski along its lengthwise direction.

Claim 6

A ski as defined in claim 1 wherein said central portion further includes a peripheral wall connecting said central portion to said two longitudinally extending portions, said peripheral wall having a number of holes perforated therein.

Claim 7

A ski as defined in claim 1 wherein said screw-holding framework has a central cross-sectional configuration of a trapezoid having no bottom.

Claim 8

A ski as defined in claim 1 wherein the rising-up wall portions of the said two longitudinally extending portions of said framework are the side surface plates of the ski.

Claim 9

A ski of a laminated construction comprising: a core body of a hard type plastic foam conforming substantially to the shape of the ski; and a screw-holding framework embedded in said core body, said framework having two portions longitudinally extended along a substantial length of the ski and serving for firmly seizing screws attaching steel edges to the ski, wherein said two portions are so constructed that the distance between the outward edges thereof is varied in accordance with the lateral width of the ski along its length; and said two portions are further provided with rising-up wall portions respectively at their laterally outward edges, and the height of the rising-up wall portions conform with the thickness distribution of the ski along its length, and a central portion serving for firmly seizing screws attaching a shoe clamping device to the ski.

Claim 10

A ski of a laminated construction comprising: a core body of a hard type plastic foam conforming substantially to the shape of the ski; and a screw-holding framework embedded in said core body, said framework having two portions longitudinally extended along a substantial length of the ski and serving for firmly seizing screws attaching steel edges to the ski, wherein said two portions are so constructed that the distance between the outward edges thereof is varied in accordance with the lateral width of the ski along its length; and said two portions are further provided with rising-up wall portions respectively at their laterally outward edges, and the height of the rising-up wall portions conform with the thickness distribution of the ski along its length, and a central portion serving for firmly seizing screws attaching a shoe clamping device to the ski.