Boots – shoes – and leggings – Soles – Wooden
Patent
1993-08-17
1997-01-14
Kavanaugh, Ted
Boots, shoes, and leggings
Soles
Wooden
36 86, 12146B, A43B 1308, A43B 106
Patent
active
055927556
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention concerns a shoe sole with an upper sole part consisting of wood, whose upper side, which is preferably orthopedically shaped, forms the support for the sole of the foot, and a running sole made of elastic and flexible material which is arranged beneath the upper sole part, whereby the upper sole part is divided, at least in the ball region, into several strips running crosswise to the lengthwise direction of the sole, and these strips are joined together by flexible intermediate pieces, preferably made of polyurethane foamed onto the wood. Further, the invention concerns a process for the manufacture of such a shoe sole.
Shoe soles with an upper sole part consisting of wood and with a running sole made of elastic and flexible material which is attached to the under side of this upper sole part have been known for a long time. Such shoe soles have the advantage that they have excellent support hygienic properties, since they absorb perspiration and control moisture, and that they support the foot in an orthopedically correct manner, particularly if the upper side of the upper sole part is shaped orthopedically. However, there is the disadvantage in shoe soles, whose upper sole part consists wholly of wood, that its rigidity does not make possible in such shoe soles a bending in the ball region, as is necessary for comfortable walking.
In order to eliminate this disadvantage, it has already been proposed to divide the upper sole part consisting of wood in the ball region and to connect the individual parts by flexible intermediate pieces, particularly of polyurethane foamed onto the wood. The arrangement of several flexible intermediate pieces offers the advantage of a better bendability. In this case, however, the strips found between the flexible intermediate pieces in the longitudinal direction of the sole must be narrow in order to be able to arrange all of the elastic intermediate pieces in the ball region. The longitudinal direction of the fibers of the wood runs usually in the longitudinal direction of the sole in the shoe soles, and the division of the upper sole part into strips thus runs crosswise thereto. Now, if the individual strips are narrow, there is the danger that with an unequal load of the same, the strips will break along the longitudinal direction of the fibers of the wood, thus crosswise to the longitudinal direction of the strips. Such an unequal load will occur, for example, if uneven surfaces are tread upon with the sole. Thus, if one treads upon small stones with the shoe sole, this may cause the breaking of one or more strips.
Therefore, the task of the present invention is to avoid this disadvantage and to form a shoe sole in which the danger of breaking the narrow strips is avoided. A solution to this task according to the invention, proceeding from a shoe sole of the type described initially, consists of the fact that the under side of the upper sole part is joined rigidly on the surface with a reinforcing layer at least in the region of the strips. This reinforcing layer effects a reinforcement of the strips crosswise to the longitudinal direction of the fibers of the wood, as a consequence of the rigid surface combination with the under side of the upper sole part, whereby the danger of breaking is excluded even with nonuniform loading of the sole.
According to a preferred form of embodiment of the invention, the reinforcing layer consists of at least one layer of wood veneer attached, preferably glued, to the under side, of the upper sole part. Frequently a single layer consisting of a wood veneer is sufficient for reinforcement. Sometimes, however, it is appropriate to provide several layers, preferably joined together by gluing, whereby if there is produced a diagonal and crosswise gluing of neighboring layers with respect to the longitudinal directions of the fibers, a plywood is formed, which then forms the reinforcing layer. The use of such a wood veneer or such a plywood has the advantage that a solid surface conne
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Kastinger Stapa-Schuhfabrik Hans Huemer Gesellschaft m.b.H.
Kavanaugh Ted
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