Boots – shoes – and leggings – Boots and shoes – Ventilated
Patent
1992-02-26
1994-12-06
Sewell, Paul T.
Boots, shoes, and leggings
Boots and shoes
Ventilated
36 3R, A43B 706
Patent
active
053698959
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a plastic shoe with ventilation.
Plastic shoes have already been known for a considerable time, both as shoes in which only certain portions, for instance the upper or insole portions, toe cap or sole, are of plastic, and also as shoes manufactured completely of plastic. Such shoes are particularly intended for special purposes, for instance to be used as beach shoes, shower clogs, athletic shoes and so forth, but are also used for general wear as work shoes and street shoes.
Unfortunately, shoes which consist entirely or essentially of plastic materials have certain drawbacks which can considerably and negatively influence their wearability which are due especially to the properties of the plastic materials which are undesirable for this sort of use, such as excessive heat insulation and lack of air permeability. Because of the defective air ventilation resulting from structural drawbacks, such shoes, particularly with long wear, produce undesirable local spots of high heat on the feet of the wearer, with the undesirable effects arising therefrom.
For this reason designers have already sought to solve this problem that known plastic shoes have been provided with ventilation openings of various configurations arid sizes arranged on the quarters or on the uppers of shoes. For instance, German patent No. 828 153 teaches a method and a device for the construction of a one-part shoe of thermoplastic material, such as polyvinyl chloride or rubber, which can be configured so that ventilation holes are formed at certain points on the shoe. However, these solutions which have been known and used up until this time are only partially satisfactory, since despite the presence of ventilation openings the local heat build-up points are frequently not reduced to the necessary degree or else when the perforations located in the shoe upper indeed are of such number that they supply sufficient ventilation, then the strength and durability of the shoe upper become insufficient.
One advantageous disclosure for the ventilation of plastic shoes is disclosed in German Printed Application 29 30 807. This specification describes a one-piece, washable and sterilizable shoe of elastic, resistant material, preferably plastic foam material, which incorporates ventilation openings in the vertical quarter area of the upper of the shoe above the edge of the sole, wherein the outside edges of the borders of the ventilation openings lie at a lower level than the corresponding inside edges of the borders of the ventilation openings. The ventilation openings are preferably at least arranged in series or in a row running around the front upper of the shoe. As a result of the special construction of these ventilation openings and their arrangement in certain areas of the shoe, good ventilation is guaranteed, particularly of the sole of the foot while it is in the shoe, while the dorsal surface of the foot or the foot instep is not so well ventilated, so that in this case heat spots can still arise, which are not prevented or even reduced by the conventional ventilation openings in the vamp area of the shoe upper, at least not to the desired degree.
The object of the present invention then is to disclose a plastic shoe in which the inherent drawbacks named above can be entirely or appreciably avoided by a simple but effective ventilation system and which also with wearing over a long period of time has exhibited a foot-friendly wearability, whereby most importantly a good ventilation of the foot, especially of the entire instep of the foot, is obtained.
This object is attained according to the invention by a plastic shoe with a ventilation arrangement, consisting of a shoe lower part with a sole and a shoe upper which is formed so that together with the lower part it forms a hollow space to receive the foot of the wearer, and ventilation openings are located at least in the surface area of the shoe upper. This shoe is characterized in that the shoe upper has a convexity or bulging out part in the vamp area, whi
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Sewell Paul T.
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