LAMINATED SKI WITH APERTURED UPPER AND LOWER BELTS

SKI LAMELLAIRE A COURROIES SUPERIEURE ET INFERIEURE AJOUREES INTERCALAIRES

English Abstract

LAMINATED SKI
Abstract of the Disclosure
A ski comprises a core of foamed plastics ma-
terial, a top facing, steel edges, a tread facing and
at least one belt between the core and one of the facings.
The belt has apertures which have received core material
as it was foamed to form a positive connection and to
bond the core to those components which are disposed
outside the apertured belts.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A laminated ski comprising a core, upper and
lower belts which cover the core, sectional edge member ex-
tending along the outside longitudinal edges of said belts,
a top facing carried by the sectional edge members associated
with the upper belt, a tread facing carried by the sectional
edge members associated with the lower belt, whereby spaces
are defined between said top facing and said upper belt and
between said tread facing and said lower belt, said belts
having spaced apart apertures distributed throughout the
length of each belt, said core consisting of foamed plastics
material, which has penetrated through the holes of both said
belts into said spaces and has filled said spaces, which ad-
join the outside surfaces of said belts, whereby said foamed
plastics material joins said belts to said facings and to said
edge members.
2. A ski as set forth in claim 1, in which at least
part of said edge members are angle sections and have a slot-
ted flange, which is fitted on the associated belt.

Description

Background of the Invention
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Most skis are laminated. Cores of plastics ma-
terial and shee-t metal elements are bonded by means of elastic
adhesives. Many skis of this type are known and their com-
ponents are often joined by means of thermo-set~ing plastic ~ f
materials under the action of heat. Whereas that method of
joining the components of the ski is inheren-tly simple, pro-
blems have arisen in the selection of the adhesives and the ~.
nature of the components to be joined. This is due to the
fact that the ski is often subjected to extreme loads owing
to the performance of the skier, to his technique and also
to large temperature changes.
It is an object of the invention to solve this .~ -
problem in a simple manner.
Another object of the invention is to utilize the
excellent performance qualities of laminated skis and to en- .:
able a foaming of the core in such a manner that all components,
inclusive of the steel edges, are satisfactorily joined.
Summary of the Invention
A laminated ski comprises a core, apertured top and :.
bottom plates, angle-section steel edges along both longi~
tudinal edges of said plates a facing on one flange of the
steel edges, so that there is a space between the facing and
the plate. Said space is filled by the foamed core material
which has penetrated through the apertures in the plates. .`~
.: ' :
In accordanca with one feature oE the invention, `:
such skis are manufactured in that the lateral steel edges, :
the tread facing, the top facing, and at least one apertured ~.
belt are located in a mold in such a manner that the belt is
spaced from one of the two facings. The space on the inside
of the belt is then filled with a foamable plasti.cs material ;
to form the core of the ski. The foamable plastics material ;
penetrates through the apertures of the belt and fills the
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space between the belt and the opposite facing so that a
positive connection is established between the belt and the
core.
Further details of the i~vention will be e~plained
more fully with reference to the drawing, in which tw~ em-
bodiments of the ski according to the invention are shown by ;;
way of example. ;
Fig. 1 is a transverse sectional view of one em- ;~
bodiment of the ski according to the invention, and
Fig. 2 is a transverse sectional view showing a
second embodiment of the ski in a mold in which the foamed
core of the ski is formed. ~-
The ski shown in Fig. 1 comprises a core 1, an
upper belt 2, a lower belt 3, steel edges 4A, ~B, a tread
facing 5, a top facing 6, and top edge members 7A, 7B. ,
The belts 2,3 extend throughout the width of the
core 1 between the latter and the edge members 7A, 7B and
4A, 4R, respectively, and have apertures 8 in any desired
distribution along the length of the belts.
The top edge members 7A, 7B and the steel edges -
4A, 4B are angle sections and are formed in known manner at
the free edge of their wider flange with curved recesses,
which may closely succeed each other. This wider flanges of
these angle sections rests on the belts 2 and 3, respectiyely.
The spaces between the narrower flanges are filled by the
tread facing 5 and by the top facing 6, respec-tively. As a
result, a space 9 is left between the belt 2 and the facing
6 and between the belt 3 and the facing 5. As will be de-
scribed more fully hereinafter, these spaces as well as the
holes 8 are filled by the foam which forms also the core
material 1. As a resul~, the core 1 is positively connected `~
to the belts 2, 3 and by the foamed plastics material is ~^
firmly joined to those components which are disposed outside
the belts.
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Simple means for fixing the top edge members are
shown in Fig. 2, which will also be referred to for an explana~ion
of the method of manufac-turing the ski. In this embodiment,
the top edye members 7A', 7B' are angle sections, in which
the flange 10 which bears on the core 1 of the ski is formed
with a longitudinal slot. ~
This ski may be manufactured ~s follows: A mold `
12 in which the core of the ski is foamed has at one edge a
recess 13, in which superimposed components consisting of the
tread facing, the steel edges 4A, 4B and the carrying lower
belt 3 are located in position for use.
At its edge that is opposite to the recess 13, the
moldi 12 is formed with a step 14, on which the upper carrying
belt 2 is placed when the longitudinal edges of said belt
have been inserted into the top edge sections 7A', 7B'.
Finally, the top facing 6 is applied, which fills the space
defined by the upwardly protruding flanges of the top edge
members 7A', 7B'. The mold is then closed and foam is formed ;~
to fill the interior of the mold. As has been explained be~
20 fore, thie foam forms the core 1 and penetrates through the ~-
holes 8 into the spaces 9 and all interfaces between the com-
ponents so that these components are firmly joined even if
they have not been joined by adhesive before. The components
of the ski can thus be assembled satisfactorily in a process ~`
which is most simple and inexpensive.
It will be understood that various changes in design
can be adopted within the scope of the invention. For in-
stance, each lower steel edge 4A, 4B may have a slotted flange,
likethe top edge members 7A', 7s', and this flange may be
fitted on the lower belt 3. Finally, the top facing 6 may
be replaced by a varnish coating, a varnish layer, a pured-in
compound or the like.
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