US5725823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a shoe sole having co-molded anti-skid insert
Assignee: FASHION SHOE LICENSING LLC
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Filing: 1996-09-10
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Granted: 1998-03-10
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Expires: 2016-09-10
Abstract
Abstract A method of forming a shoe sole having a co-molded anti-skid insert is provided. Raw unvulcanized rubber sheet material for the insert, and raw unvulcanized rubber sheet material for the main portion of the sole are placed in a mold and heated to fuse them together, to vulcanize the rubber, and to produce an anti-skid pattern on the insert. The material of the insert is preferably substantially the same as that of the main portion of the sole, except for its color; however, it has the appearance and texture of a separate insert.
Inventors
- 👤 Norman H. Finn
- 👤 Chih-Ming Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:27
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/12; B29D35/14; B29D35/142; A; A43; A43B; A43B13/00; A43B13/14; A43B13/22; A43B13/223; B29C; B29C43/00; B29C43/02; B29C43/021; B29C43/20; B29C43/203; B29C2791/00; B29C2791/001; B29C33/00; B29C33/42; B29K; B29K2021/00; B29K2995/00; B29K2995/0018; B29K2995/002; B29K2995/0021; B29L; B29L2031/00; B29L2031/48; B29L2031/50; B29L2031/504
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
205 words
A method of making a shoe sole of first and second polymeric materials, said shoe sole having an anti-skid insert of said first polymeric material, said method comprising the steps of: providing a mold having a main depression having a shape corresponding to a shape of said shoe sole and an insert depression having a shape corresponding to a shape of said insert, said insert depression having a depth and being separated from said main depression by a raised wall surrounding said insert depression, said raised wall having a height less than said depth; feeding said first polymeric material into said insert depression in said mold within said raised wall; feeding said second polymeric material into said main depression in said mold outside said raised wall, and overlying said first polymeric material in said insert depression within said raised wall; and closing said mold and applying heat and pressure to said first and second polymeric materials in said mold to form a recess in said second polymeric material within which said first polymeric material is located and to laterally separate said first polymeric material from said second polymeric material by a groove formed by said raised wall, thereby forming said shoe sole having said insert.
Claim 2
Independent Claim
205 words
A method of making a shoe sole of first and second polymeric materials, said shoe sole having an anti-skid insert of said first polymeric material, said method comprising the steps of: providing a mold having a main depression having a shape corresponding to a shape of said shoe sole and an insert depression having a shape corresponding to a shape of said insert, said insert depression having a depth and being separated from said main depression by a raised wall surrounding said insert depression, said raised wall having a height less than said depth; feeding said first polymeric material into said insert depression in said mold within said raised wall; feeding said second polymeric material into said main depression in said mold outside said raised wall, and overlying said first polymeric material in said insert depression within said raised wall; and closing said mold and applying heat and pressure to said first and second polymeric materials in said mold to form a recess in said second polymeric material within which said first polymeric material is located and to laterally separate said first polymeric material from said second polymeric material by a groove formed by said raised wall, thereby forming said shoe sole having said insert.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein each of said feeding steps comprises feeding a sheet of polymeric material into said mold.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein said step of feeding a second polymeric material comprises feeding a second polymeric material that differs from said first polymeric material by addition of a dye.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein each of said feeding steps comprises feeding rubber.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein said applying heat comprises heating said polymeric materials to a temperature of from about 140° C. to about 160° C.
Claim 7
Dependent Claim
12 words
The method of claim 5 wherein said temperature is about 150° C.
Claim 8
Dependent Claim
25 words
The method of claim 1 wherein said applying pressure comprises applying a pressure of from about 40 kg/cm 2 to about 160 kg/cm 2 .
Claim 9
Dependent Claim
14 words
The method of claim 7 wherein said pressure is about 150 kg/cm 2 .
Claim 10
Dependent Claim
26 words
The method of claim 1 wherein said applying heat and pressure is carried out for a duration of from about 5 minutes to about 7 minutes.
Claim 11
Dependent Claim
12 words
The method of claim 9 wherein said duration is about 6 minutes.
Claim 12
Dependent Claim
24 words
The method of claim 1 wherein said applying heat is carried out for a duration of from about 5 minutes to about 7 minutes.
Claim 13
Dependent Claim
12 words
The method of claim 11 wherein said duration is about 6 minutes.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-03-09 | 2001-09-08 | 2002-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-09 | 2005-09-08 | 2006-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-09 | 2009-09-08 | 2010-03-10 | $7700.00 | Window Closed / Lapsed |