FOAM POLYURETHANE BOOT WITH LINING

• US 3,823,493 A
• Filed: 10/29/1971
• Issued: 07/16/1974
• Est. Priority Date: 06/11/1969
• Status: Expired due to Term

• Current Assignee: Michael Brehm, Peter Rutsch
• Original Assignee: Michael Brehm, Peter Rutsch
• Inventors: Brehm, Michael, Rutsch, Peter
• Primary Examiner(s): Lawson, Patrick D.
• Application Number:
  US05/193,673
• Time in Patent Office: 991 Days
• Field of Search: 36/2.5AL,4,7.1,7.3,2.5R
• US Class Current: 36/109
• CPC Class Codes: A43B 3/02 Boots covering the lower leg

Abstract

Improvement in the formation of footwear, particularly boots, by molding polyurethane foam in the annular space between a last and a boot outer mold. In a preferred aspect, there is provided a fabric on the inside wall of the foam, molded boot. In a most preferred aspect, the fabric is bonded to a plastic film of, for example, polyvinyl chloride, and the film bonded fabric is placed over the last in a mold whereupon polyurethane foam precursor is foamed in the mold and adhered to the film thereby adhering indirectly to the fabric while not penetrating such fabric interstices. In another aspect of this invention, reinforcing means, of steel or reinforced plastic, is molded right into the boot during formation thereon.

Claims

2. A boot as claimed in claim 1 wherein said plastic film is polyvinyl chloride.

3. A boot as claimed in claim 1 having a substantially rigid reinforcing plate means integral with said polyurethane foam at predetermined locations therein.

4. A boot as claimed in claim 3 wherein said reinforcing plate means is steel.

5. A boot as claimed in claim 3 wherein said reinforcing plate means is substantially rigid plastic.

6. A boot as claimed in claim 5 wherein said plastic has fiber reinforcement therein.

7. A boot as claimed in claim 3 wherein said rigid reinforcing plate covers the toe portion of said boot and said rigid reinfrocing plate is metal.