Method of making ventilative insole

• US 20050269723A1
• Filed: 06/03/2004
• Published: 12/08/2005
• Est. Priority Date: 06/03/2004
• Status: Active Grant

• Current Assignee: Jer-Chin Ou
• Original Assignee: Jer-Chin Ou
• Inventors: Ou, Jer-Chin
• Granted Patent: US 7,157,028 B2
• Time in Patent Office: Days
• US Class Current: 264/45.500
• CPC Class Codes: A43B 17/08 ventilated
• CPC Class Codes: B29C 44/5654 Subdividing foamed articles to obtain particular surface properties, e.g. on multiple modules
• CPC Class Codes: B29D 35/122 Soles

Abstract

A method of making an insole has the steps: a) Prepare a mold with a cavity therein. The mold has a plurality of protrusions at a portion of a sidewall of the cavity. b) Inject a foaming material into the cavity of the mold. c) Strip the mold to get a piece material with a plurality of pores at a predetermined portion thereof. The piece material has a skin layer on a surface thereof and sidewalls of the pores and the pores form a symmetrical pattern on the piece material. d) Cut a layer of a side of the piece material off to expose ends of the pores. d) Cut the piece material to get the insole.

Claims

1. A method of making an insole, comprising the steps of:

preparing a mold with a first mold piece and a second mold piece and having cavity therein, wherein the first mold piece has a plurality of protrusions at a portion of a sidewall of the cavity;

injecting a foaming material into the cavity of the mold;

stripping the mold to get a piece material with a plurality of pores at a predetermined portion thereof, wherein the piece material has a skin layer on a surface thereof and sidewalls of the pores and the pores form a symmetrical pattern on the piece material;

cutting a layer of a side of the piece material off to open ends of the pores, and

cutting the piece material to get the insole.

2. The method as defined in claim 1, wherein included angles between a surface of the protrusions of the first mold piece and the sidewall are in a range between 95 degrees and 150 degrees.

3. The method as defined in claim 1, wherein included angles between a surface of the protrusions of the first mold piece and the sidewall are in a range between 95 degrees and 115 degrees and a ratio of foaming of the foaming material is over 1.5 times.

4. The method as defined in claim 1, wherein included angles between a surface of the protrusions of the first mold piece and the sidewall are in a range between 115 degrees and 150 degrees and a ratio of foaming of the foaming material is under 1.5 times.