Process of manufacturing an inner boot

• US 4,268,931 A
• Filed: 10/19/1977
• Issued: 05/26/1981
• Est. Priority Date: 10/21/1976
• Status: Expired due to Term

• Current Assignee: Etablissements Francois Salomon et FILS
• Original Assignee: Etablissements Francois Salomon et FILS
• Inventors: Salomon, Georges P. J.
• Primary Examiner(s): Lawson, Patrick D.
• Application Number:
  US05/843,381
• Time in Patent Office: 1,315 Days
• Field of Search: 12/142 R, 12/142 P, 12/146 R, 36/117, 36/118, 36/119, 36/120, 36/121
• US Class Current: 12/146.00R
• CPC Class Codes: A43B 5/0405 Linings, paddings or insertions; Inner boots

Abstract

The present invention concerns an article of footwear to be placed inside a ski boot, and the process of its manufacture.

The process according to the invention is characterized by the fact that the article of footwear is molded in its open position, thereby permitting the inner core to be conveniently removed from the mold.

Claims

1. Molding process for an article of footwear to be placed in a boot, said article of footwear being molded as a single piece with its upper part having substantially the shape of said article in its open position, whereby said article can be conveniently put on and taken off.

2. Process according to claim 1, including the steps of

(a) molding the article of footwear by placing a core inside a hollow mold;

(b) injecting synthetic matter into the space provided between said core and said mold;

(c) removing said article of footwear by extracting the inner core, the article of footwear being open in the position for putting it on and removing it;

(d) the inner core having a lower part in the shape of a foot and being extended by an upper part having substantially the shape of the volume delimited by the article of footwear open in the slipping-on/slipping-off position;

(e) the hollow mold having in its lower part, the shape of the inside of the boot and, in its upper part, a practically flanged shape corresponding to the open position for putting on and taking off said article of footwear, whereby, on the one hand, the inner core can be conveniently extracted during the mold-stripping process, and, on the other hand, the skier can conveniently put on and take off the article of footwear.

3. Process according to claim 1, said footwear including at least one pliable zone allowing the closing of the article of footwear when it is put on the foot, wherein said pliable zone is created by connecting the edges of the article of footwear surrounding the pliable zone by a pliable membrane.

4. Process according to claim 3, wherein, in order to connect the edges of the article of footwear surrounding the pliable zone by a pliable membrane, a recess allowing the passage of the pliable membrane is provided between the inner core and the hollow mold on a level with the pliable zone.

5. Process according to claim 4, wherein, before molding, a sock is slipped over the inner core, said recess being at least as thick as the sock, so that the pliable membrane is at least constituted by said sock.

6. Process according to claim 3, wherein the recess communicates with the space between the core and the hollow mold, so that the pliable membrane is created directly when the article of footwear is molded.

7. Process according to claim 6, wherein the thickness of the recess is less than that of the space between the core and the hollow mold, so that the thickness of the pliable membrane is less than that of the article of footwear.

8. Process according to any of claim 3, wherein the edges of the hollow mold defining the pliable zone are bevelled in relationship to one another.

9. Molding process for an article of footwear to be placed in a boot, including the steps of

(a) molding the article of footwear by placing a core inside a hollow mold;

(b) injecting synthetic matter into the space provided between said core and said mold;

(c) removing said article of footwear by extracting the inner core, the article of footwear being open in the position for putting it on and removing it;

(d) the inner core having a lower part in the shape of a foot and being extended by an upper part having substantially the shape of the volume delimited by the article of footwear open in the slipping-on/slipping-off position;

(e) the hollow mold having, in its lower part, the shape of the inside of the boot and, in its upper part, a practically flanged shape corresponding to the open position for putting on and taking off said article of footwear, whereby, on the one hand, the inner core can be conveniently extracted during the mold-stripping process, and, on the other hand, the skier can conveniently put on and take off the article of footwear.