Abstract: Ski with a core of light-weight material, preferably of specific gravity from 0.1 to 0.25, and an outer sheathing composed of a reinforced synthetic plastics material. The core has an internal reinforcement of relatively narrow ribs of unreinforced plastics material with a wall thickness less than 1.5 mm and preferably about 0.5 mm extending substantially at right angles to its upper side and/or its under side directly unified with the plastics material of the sheathing.

Abstract: An improved injection molded ski having excellent mechanical properties which comprises an injection molded ski body that is made of thermoplastic resin and provided with a pair of edge receiving portions on the bottom surface thereof, a pair of steel edges attached to the edge receiving portions of the ski body and a sole plate integrally formed by injection molding of thermoplastic resin on the bottom surface of said ski body; and an injection molding method for producing the above ski.

Abstract: A ski is described which has a running surface and a profiling transverse to the longitudinal axis of the ski in at least one region of the underside of the ski intermediate the tip and the rear end of the latter. The ski comprises a rifling of grooves extending transversely to the longitudinal axis of the ski, in the aforesaid region of the underside of the ski, which rifling constitutes at least part of the transverse profiling. Preferably, the portions of the ski underside adjacent the rifled region and up to the tip of the ski, on the one hand, and up to the rear end of the ski, on the other hand, are smooth. Methods for producing the ski are also described.

Abstract: A ski structure having a trapezoidal, foamed core wrapped with fiber-reinforced plastic with its wider base facing downward. The plastic sections covering the base and top of the trapezoidal core are rigidly joined to juxtaposed layers of fiber-reinforced plastic, which, in turn are combined with other layers of suitable material into a generally boxlike structure shaped like a ski. The spaces within the boxlike structure on each side of the trapezoid are also filled with foamed material.

Abstract: A substrate, useful as the base layer on a snow ski is made, comprising a rigid plastic matrix and from about 5 wt.% to about 45 wt.% of a thermoplastic, water soluble polymer disposed within the plastic matrix; wherein the substrate provides a surface where the water soluble polymer will be leached out of the rigid plastic matrix upon contact with water; to provide a boundary lubricant film.

Abstract: A snow ski is made by superimposing a protective assembly of polyacrylate sheets on a flexible core of a ski body having a bonded base surface and sidewall surfaces and then bonding the polyacrylate sheets to the ski core forming a top protective ski surface, the protective assembly being consolidated at a temperature and pressure effective to stress relieve the polyacrylate sheets.

Abstract: A ski comprising an upper protective plate, a lower low-friction sole plate and a core of a synthetic-resin material molded between the plates and reinforced with steel filaments or wires extending the full length of the ski. Except at the spoon or toe of the ski and at the heel thereof, the steel filaments are bonded directly (without give or play) to the synthetic-resin core while at the heel and toe portions of the ski the steel filaments are bonded to the synthetic-resin core by an elastic pliable material (i.e. with give or play).

Abstract: A lightweight ski, having excellent flexibility in both vertical and sidewall deflection, yet exhibiting high shear strength, is disclosed. The ski is fabricated using a honeycomb sandwich construction wherein the ribbon or higher shear strength direction of the honeycomb is along the length of the skis. Also, the facings bonded to the top and bottom portions of the honeycomb core comprise a fiber reinforced resin in which the fibers extending along the length of the ski to further enhance a shear strength in that direction. The sidewall of the ski comprises flexible, rubberized material and further, the ski has at least one resilient, flexible metallic running edge, the edge being so constructed that it does not substantially increase the vertical or sidewall stiffness of the ski.

Abstract: A method of making a novel ski having viscoelastic properties is disclosed. The ski is composed of continuous reinforcing fibers embedded in a matrix of an elastomer modified syntactic plastic foam. The fibers are arranged so as to be at an angle of 0.degree. and 90.degree. with respect to the longitudinal axis of the ski.

Abstract: A ski having a top covering which consists of successive complementary plastic material sheeting sections, which are colored throughout in different colors.

Abstract: A snow ski having a plastic foam core formed in situ between preformed top and bottom subassemblies.

Abstract: A ski has a polyurethane core cut into three side-by-side sections, sandwiched between an upper and a running sole with interposed layers of stratified glass fibers in an epoxy resin. Solely the central part of the core is encased in and reinforced by a further layer of glass fibers in an epoxy resin, including an inner stratum of random fibers and an outer stratum of fibers extending along the entire length of said central part.

Abstract: Plastic ski of compound structure consisting of a running surface with steel edges, a lower strap, an upper strap, and a cover layer, the upper and the lower straps being connected to each other by an injected core of plastic foam.

Abstract: A pair of short skiis each comprising a flexible forward shovel section and a less flexible after section, the flexible shovel section including a substantially flat running portion and a leading turned up tip portion, the total running length of the ski being comprised of the running portion and the less flexible section. The boot location area on each ski is so disposed with reference to the total running length of the ski that the ball of the skier's foot is disposed at or slightly behind the approximate median of the ski's total running length. The flexible shovel section extends from just forward of said median. Binding means are provided to hold the skier's foot on each ski such that when the skier's boot is placed and held in said binding means, the heel of the skier's boot will be disposed approximately 6 inches forward of the tail end of the ski.

Abstract: A ski of the torsion box type with a foam core and an inner torsion box provided between an outer torsion box and the core.

Abstract: A ski comprising at least one coating strip applied to at least a portion of its sliding surface, wherein at least a part of the coating strip is interchangeable, said coating strip being removably affixed to the underside of the ski.

Abstract: A structural product useful in making skis and other articles of manufacture includes a core comprising a multiplicity of cells of structural material arranged side by side with their axes substantially parallel to each other and their ends open. A quantity of foamed plastic fills the cells and is bonded to the walls thereof. A structural skin lies across at least one face of the core and is bonded to the open ends of the component cells, thereby rigidifying the product.

Abstract: A snow ski is made by superimposing a protective assembly of polyacrylate sheets on a flexible core of a ski body having a bonded base surface and sidewall surfaces and then bounding the polyacrylate sheets to the ski core forming a top protective ski surface, the protective assembly being consolidated at a temperature and pressure effective to stress relieve the polyacrylate sheets.

Abstract: The top edge portions of a ski of plastic material are produced in a two-part mold by placing the bottom surface sheet and edge portions of the ski on the floor of the mold while preformed top edge portions carry the top surface sheet and are supported in the mold by an auxiliary strip which extends outwardly from its side surface and rests on two opposite walls of the mold box. The auxiliary strips are held in place by magnets lodged in the opposite mold walls while the mold is open. After closing the mold with the mold lid a plastic foam material in the mold is expanded to produce the ski core and bond together the top and bottom surface sheets and edge portions of the ski. The auxiliary strips are severed from the top edge portions to finish the ski.