US4608213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and mold apparatus for molding a padding member
Assignee: Nichiei Industry Co Ltd
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Filing: 1984-05-31
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Granted: 1986-08-26
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Expires: 2004-05-31
Abstract
Abstract A mold for producing a padding member having side by side portions of different hardnesses integral with each other, and a method of producing the padding member using such mold. The mold has a lower half with partition walls movably extending upwardly through the bottom of the lower mold half into the interior of the lower mold half to define a plurality of cavities into which moldable materials of which the padding member is to be formed and having different hardnesses from each other can be contained. The upper mold half is placed over the lower mold half, and has pressing members extending downwardly which engage the edges of the partition walls and force the partition walls downwardly. The pressing members are spaced from each other along the partition walls, so that the materials on the opposite sides of the partition walls can contact each other and, while molding is being carried out, become integrally joined to each other.
Inventors
- 👤 Masao Kurumizawa
- 👤 Mitsuru Terui
- 👤 Nobuyasu Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:23
CPC Classifications
B; B29; B29C; B29C69/00; B29C69/001; B29C33/00; B29C33/30; B29C43/00; B29C43/02; B29C43/32; B29C43/36; B29C44/00; B29C44/02; B29C44/04; B29C44/0461; B29C44/0469; B29C44/10; B29C48/00; B29C48/001; B29C48/0011; B29C48/0022; B29C48/03; B29C48/12; B29K; B29K2995/00; B29K2995/0037; B29K2995/0063; B29K2995/0064; B29L; B29L2031/00; B29L2031/58; B29L2031/751; Y; Y10; Y10S; Y10S264/00; Y10S264/07
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
179 words
A method of producing a padding member having side by side portions of different hardnesses integral with each other, comprising: providing a lower mold half having partition wall means movably extending through the bottom of said lower mold half in a fluid-tight manner and spring urged to protrude upwardly into the interior of said lower mold half to form a plurality of cavities; filling moldable materials of which the padding member is to be formed and having hardnesses different from each other into said cavities; placing over said lower mold half an upper mold half having pressing members spaced from each other in the horizontal direction along lines corresponding to the upper edges of said partition wall means and projecting downwardly from said upper mold half at positions corresponding to said partition wall means and carrying out molding, said pressing members, during molding, pressing on said partition wall means for lowering said partition wall means while allowing the materials being molded to abut each other, whereby said materials in said cavities are integrally joined to each other during molding.
Claim 2
Independent Claim
179 words
A method of producing a padding member having side by side portions of different hardnesses integral with each other, comprising: providing a lower mold half having partition wall means movably extending through the bottom of said lower mold half in a fluid-tight manner and spring urged to protrude upwardly into the interior of said lower mold half to form a plurality of cavities; filling moldable materials of which the padding member is to be formed and having hardnesses different from each other into said cavities; placing over said lower mold half an upper mold half having pressing members spaced from each other in the horizontal direction along lines corresponding to the upper edges of said partition wall means and projecting downwardly from said upper mold half at positions corresponding to said partition wall means and carrying out molding, said pressing members, during molding, pressing on said partition wall means for lowering said partition wall means while allowing the materials being molded to abut each other, whereby said materials in said cavities are integrally joined to each other during molding.
Claim 3
Dependent Claim
18 words
The method as claimed in claim 1 in which said moldable materials are pieces of foamed plastic material.
Claim 4
Dependent Claim
25 words
The method as claimed in claim 1 further comprising cutting the resulting molded padding member in horizontal planes to form a plurality of padding members.
Claim 5
Dependent Claim
184 words
A mold for producing a padding member having side by side portions of different hardnesses integral with each other, comprising: a lower mold half having partition wall means movably extending through the bottom of said lower mold half in a fluid-tight manner and spring urged to protrude upwardly into the interior of said lower mold half to form a plurality of cavities in which moldable materials of which the padding member to be formed and having hardnesses different from each other can be contained for molding; and an upper mold half having pressing members spaced from each other in the horizontal direction along lines corresponding to the upper edges of said partition wall means and projecting downwardly from said upper mold half at positions corresponding to said partition wall means for, when said upper mold half is closed over said lower mold half for carrying out molding, pressing on said partition wall means for lowering said partition wall means while allowing the materials to be molded to abut each other, whereby said materials in said cavities are integrally joined to each other during molding.
Claim 6
Dependent Claim
184 words
A mold for producing a padding member having side by side portions of different hardnesses integral with each other, comprising: a lower mold half having partition wall means movably extending through the bottom of said lower mold half in a fluid-tight manner and spring urged to protrude upwardly into the interior of said lower mold half to form a plurality of cavities in which moldable materials of which the padding member to be formed and having hardnesses different from each other can be contained for molding; and an upper mold half having pressing members spaced from each other in the horizontal direction along lines corresponding to the upper edges of said partition wall means and projecting downwardly from said upper mold half at positions corresponding to said partition wall means for, when said upper mold half is closed over said lower mold half for carrying out molding, pressing on said partition wall means for lowering said partition wall means while allowing the materials to be molded to abut each other, whereby said materials in said cavities are integrally joined to each other during molding.
Claim 7
Dependent Claim
16 words
A mold as claimed in claim 4 in which said pressing members are pin type members.
Claim 8
Dependent Claim
21 words
A mold as claimed in claim 4 in which said partition wall means comprise a single partition wall forming two cavities.
Claim 9
Dependent Claim
24 words
A mold as claimed in claim 4 in which said partition wall means comprises a plurality of partition walls forming at least three cavities.
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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) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |