Method of making ventilative insole

• US 7,157,028 B2
• Filed: 06/03/2004
• Issued: 01/02/2007
• Est. Priority Date: 06/03/2004
• Status: Expired due to Fees

• Current Assignee: Jer-Chin Ou
• Original Assignee: Jer-Chin Ou
• Inventors: Ou, Jer-Chin
• Primary Examiner(s): Lee; Edmund H.
• Application Number:
  US10/859,117
• Publication Number:
  US 20050269723A1
• Time in Patent Office: 943 Days
• Field of Search: None
• US Class Current: 264/45.5
• 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 a 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, 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.

2. 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 a 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, 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.