Classifications

• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B7/00—Footwear with health or hygienic arrangements
• • A—HUMAN NECESSITIES
  • A43—FOOTWEAR
  • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
  • A43B1/00—Footwear characterised by the material
  • A43B1/06—Footwear characterised by the material made of wood, cork, card-board, paper or like fibrous material 

Definitions

• the sterilization to which the footwear is to be subjected is to take place at a temperature of between 100 and 150 C., particularly between 128 and 130 C.
• the sterilization is to last for a time of between 15 and 60 minutes, particularly, however, 30 minutes.
• the sterilizable footwear is of the clog-bottom type, consisting of a bottom made of wood and an upper made of flexible material, which is applied to the bottom in a conventional way.
• a suitable combination of materials among known materials, it has been possible to develop footwear that can be sterilized. Making such a choice can be regarded as the result of perseverance, of a non-patentable nature, but with consideration to what has been stated above, the combination chosen must not be an obvious measure.
• the combination consists of choosing a kind of wood for the bottom that can be subjected to the above-mentioned sterilization without becoming distorted. Nails, if any, in the bottom must not loosen.
• the bottom is to be made of such material that it retains its shape and flexibility.
• the kind of wood that meets the above-mentioned requirements, according to the invention should be beech-wood, and then particularly common, ordinary beech-wood. It has also proved that the upper should consist of a plastic material which is available commercially and is sold under the trade name Gekalit. For fastening the upper to the bottom it is appropriate to use copper nails.
• Gekalit consists of a woven fabric, particularly cotton fabric, to which has been applied a plastic, and then Patented Jan. 5, 1971 polyvinyl chloride with a softener and a stabilizer.
• the plastic should appropriately be applied so that a coherent layer is formed. It has proved to be advantageous to use a fabric with a weight of 200 grammes per square metre.
• the softener can consist of a phthalic acid ester.
• a barium-cadmium compound is a suitable stabilizer.
• the polyvinyl chloride Before its application to the fabric, the polyvinyl chloride has been obtained through emulsion polymerization.
• a moistureabsorbing layer can be applied through gluing.
• this layer consists of a fabric, which has been impregnated with an elastomer.
• the moisture-absorbing layer also consists of a cotton fabric, which appropriately has a weight of 200 grammes per square metre.
• the elastomer consists of polyurethane.
• a suitable glue for fastening the two layers together is a polyurethane glue.
• the bottom according to the present invention can have exactly more or less the same form as the bottom of ordinary clogs.
• the bottom can moreover be provided with a tread, which can either be a wear tread or a friction tread. This tread can be applied with glue or with nails.
• the tread should then have the form of a sole, but the bottom can of course also be coated with a liquid layer that can stiffen. The requirement for the tread is that it will withstand being sterilized. Further, it is appropriate to allow the bottom to have arrangements by means of which static electricity in the bottom can be removed.
• the upper should appropriately be nailed on to the bottom by means of copper nails. It is then the edge of the upper which is nailed to the bottom. It is then advisable to have a nylon band under the heads of all of the nails. Over the bottom the upper forms a band or a cavity under which the users foot can be inserted, so that the bottom can be secured to said foot.
• a shoe according to the present invention i.e. consisting of beech-wood, although not red-beech, and said upper made of Gekalit, can be sterilized at least a hundred times. With consideration to the frequency of the sterilizations, such a sterilizable shoe will have a life corresponding to that of a similar shoe which is not subjected to sterilization.
• Footwear capable of being repeatedly sterilized comprising:
• an upper secured to said sole and made of a fabric coated with emulsified polyvinylchloride containing a softening agent and a stabilizing agent whereby the coated fabric upper and the wooden sole substantially retain shape when repeatedly subjected to sterilizing treatments for a period of 15 to 60 minutes and at a temperature of C. to C.
• stabilizing agent is a barium-cadmium compound.

Landscapes

• Health & Medical Sciences (AREA)
• Epidemiology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20303038

Family Applications (1)

Country Status (4)

• 1968
  • 1968-09-24 CH CH1424368A patent/CH493220A/de not_active IP Right Cessation
  • 1968-09-30 US US763956A patent/US3552038A/en not_active Expired - Lifetime
  • 1968-10-01 DE DE19681800419 patent/DE1800419A1/de active Pending
  • 1968-12-11 GB GB1232316D patent/GB1232316A/en not_active Expired

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