Patent US4418483A successfully refreshed from Google Patents.
US4418483A
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US
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Method of manufacturing shoe sole material and shoes products made by the same
Assignee: RINZAI Co Ltd 4-1 NIBANCHO 3-CHOME NAGATA-KU KOBE-SHI HYOGO-KEN JAPAN
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Filing: 1981-03-31
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Granted: 1983-12-06
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Expires: 2001-03-31
Abstract
Abstract A method of manufacturing shoe sole material which is lightweight in addition to having such properties as the conventional rubber sole materials have like wear resistance and elasticity etc., in a simple manner by forming the outsole and midsole layers into one piece by fusion using a mold. The mold comprises mold pieces having on their surface optional pattern and protruding stripes of the same or different pattern carved at equal intervals, and permits a streamline-shaped heel-up on the rear end of the portions which are to become heels, at the same time as forming the midsole and outsole layers into one piece by fusion.
Inventors
- 👤 Minoru Fujita
- 👤 Shigeo Nishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:15
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; A; A43; A43B; A43B13/00; A43B13/02; A43B13/12; A43B13/14; A43B13/18; A43B13/187; B29; B29C; B29C43/00; B29C43/02; B29C43/021; B29C44/00; B29C44/02; B29C44/10; B29D; B29D35/00; B29D35/12; B29D35/14; B29D35/142; B29D35/148; C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; B29K; B29K2105/00; B29K2105/04; B29K2105/25; B29K2105/253; B29L; B29L2031/00; B29L2031/48; B29L2031/50; B29L2031/504; B32B2437/00; B32B2437/02; Y; Y10; Y10S; Y10S264/00; Y10S264/18; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249981
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
127 words
A method of manufacturing shoe sole material, which comprises: superposing a first sheet for a midsole layer on a second sheet for an outsole layer in a mold having a pattern formed on at least the mold surface in contact with said second sheet, said first sheet comprising a synthetic resin, a crosslinking agent and a foaming agent, said second sheet comprising a synthetic resin, a crosslinking agent and a foaming agent, said first and second sheets having different foamability ratios and being capable of being fused together under heat; and hot-pressing said superposed first and second sheets in said mold to foam at least said first sheet and form crosslinkages in and between said first and second sheets to fuse said first and second sheets together.
Claim 2
Independent Claim
127 words
A method of manufacturing shoe sole material, which comprises: superposing a first sheet for a midsole layer on a second sheet for an outsole layer in a mold having a pattern formed on at least the mold surface in contact with said second sheet, said first sheet comprising a synthetic resin, a crosslinking agent and a foaming agent, said second sheet comprising a synthetic resin, a crosslinking agent and a foaming agent, said first and second sheets having different foamability ratios and being capable of being fused together under heat; and hot-pressing said superposed first and second sheets in said mold to foam at least said first sheet and form crosslinkages in and between said first and second sheets to fuse said first and second sheets together.
Claim 3
Dependent Claim
25 words
A method according to claim 1, wherein said mold has patterns formed on the mold surfaces in contact with both said first and second sheets.
Claim 4
Dependent Claim
45 words
A method according to claim 1, wherein said first sheet is composed mainly of 1,2-polybutadiene, an ethylene-vinyl acetate copolymer or a synthetic rubber, and has a foaming ratio from 1.5 to 15 and a hardness from 30 to 80 when formed into said midsole layer.
Claim 5
Dependent Claim
22 words
A method according to claim 1, wherein said midsole layer comprises two or more layers having different foaming ratios or different hardnesses.
Claim 6
Dependent Claim
37 words
A method according to claim 1, wherein said second sheet is composed mainly of 1,2-polybutadiene, an ethylene-vinyl acetate copolymer or a synthetic rubber, and has a hardness from 45 to 98 when formed into said outsole layer.
Claim 7
Dependent Claim
16 words
A shoe product containing the shoe sole material manufactured according to the method of claim 1.
Claim 8
Independent Claim
172 words
A method of manufacturing shoe sole material, which comprises: superposing a first sheet for a midsole layer on a second sheet for an outsole layer in a mold having a pattern formed on at least the mold surface in contact with said second sheet, at least said mold surface in contact with said second sheet further having protruding stripes at equal intervals on said mold surface, said first sheet comprising a synthetic resin, a crosslinking agent and a foaming agent, said second sheet comprising a synthetic resin, a crosslinking agent and a foaming agent, said first and second sheets having different foamability ratios and being capable of being fused together under heat; and hot-pressing said superposed first and second sheets in said mold to foam at least said first sheet and form crosslinkages in and between said first and second sheets to fuse said first and second sheets together, and to form a streamline-shaped heel-up on the portion of said shoe sole material which is to become the heel of the shoe.
Claim 9
Independent Claim
172 words
A method of manufacturing shoe sole material, which comprises: superposing a first sheet for a midsole layer on a second sheet for an outsole layer in a mold having a pattern formed on at least the mold surface in contact with said second sheet, at least said mold surface in contact with said second sheet further having protruding stripes at equal intervals on said mold surface, said first sheet comprising a synthetic resin, a crosslinking agent and a foaming agent, said second sheet comprising a synthetic resin, a crosslinking agent and a foaming agent, said first and second sheets having different foamability ratios and being capable of being fused together under heat; and hot-pressing said superposed first and second sheets in said mold to foam at least said first sheet and form crosslinkages in and between said first and second sheets to fuse said first and second sheets together, and to form a streamline-shaped heel-up on the portion of said shoe sole material which is to become the heel of the shoe.
Claim 10
Dependent Claim
28 words
A method according to claim 7, wherein said mold has patterns and protruding stripes formed on the mold surfaces in contact with both said first and second sheets.
Claim 11
Dependent Claim
17 words
A method according to claim 7, wherein said protruding stripes are formed in parallel at certain intervals.
Claim 12
Dependent Claim
45 words
A method according to claim 7, wherein said first sheet is composed mainly of 1,2-polybutadiene, an ethylene-vinyl acetate copolymer or a synthetic rubber, and has a foaming ratio from 1.5 to 15 and a hardness from 30 to 80 when formed into said midsole layer.
Claim 13
Dependent Claim
22 words
A method according to claim 7, wherein said midsole layer comprises two or more layers having different foaming ratios or different hardnesses.
Claim 14
Dependent Claim
37 words
A method according to claim 7, wherein said second sheet is composed mainly of 1,2-polybutadiene, an ethylene-vinyl acetate copolymer or a synthetic rubber, and has a hardness from 45 to 98 when formed into said outsole layer.
Claim 15
Dependent Claim
16 words
A shoe product containing the shoe sole material manufactured according to the method of claim 7.
References Cited (Backward Citations)
US1813235A
Cited
US2199006A
Cited
US2247337A
Cited
US2650390A
Cited
US2979775A
Cited
US2822627A
Cited
US3137749A
Cited
US3047888A
Cited
US3423490A
Cited
US3357137A
Cited
US3596381A
Cited
US3766669A
Cited
US3818085A
Cited
US3944704A
Cited
US4128950A
Cited
US4167824A
Cited
US4187621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |