US4459249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a foamed protective and decorative molding for an automobile
Assignee: Inoac Corp
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Filing: 1982-09-28
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Granted: 1984-07-10
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Expires: 2002-09-28
Abstract
Abstract A method of manufacturing a protective and decorative molding for an automobile, comprising the steps of: adding a foaming agent to a starting resinous material comprising a vinyl chloride polymer or copolymer or a blend thereof; kneading the foaming agent and the starting resinous material; successively forming the kneaded mixture into an elongated rod or sheet blank by means of extruder or calender rolls; shearing the rod or blank into pieces having a predetermined shape; and molding the piece in a mold having high-frequency heating electrodes to apply a high-frequency voltage to the piece so that the foaming agent contained in the piece decomposes and foams to provide a product having a predetermined shape.
Inventors
- 👤 Hiromichi Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:38
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/58; B29C44/588; B29B; B29B11/00; B29B11/06; B29B11/10; B29C44/02; B29C44/12; B29C44/14; B29C33/00; B29C33/10; B29K; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/255; B29L; B29L2031/00; B29L2031/30; B29L2031/3005; Y; Y10; Y10S; Y10S264/00; Y10S264/64; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
A method of manufacturing a protective and decorative molding for an automobile, comprising the successive steps of: adding a foaming agent to a starting resinous material comprising a vinyl chloride polymer or copolymer or a blend thereof; kneading the foaming agent and the starting resinous material; forming the kneaded mixture into an elongated rod or sheet blank by means of an extruder or calender rolls; shearing the rod or blank into pieces having a predetermined shape; forming pin-like degassing holes in the upper face of each piece; and molding each piece in a mold having high-frequency heating electrodes to apply a high-frequency voltage to the piece so that the foaming agent contained in the piece decomposes and foams to provide a product having a predetermined shape.
Claim 2
Independent Claim
126 words
A method of manufacturing a protective and decorative molding for an automobile, comprising the successive steps of: adding a foaming agent to a starting resinous material comprising a vinyl chloride polymer or copolymer or a blend thereof; kneading the foaming agent and the starting resinous material; forming the kneaded mixture into an elongated rod or sheet blank by means of an extruder or calender rolls; shearing the rod or blank into pieces having a predetermined shape; forming pin-like degassing holes in the upper face of each piece; and molding each piece in a mold having high-frequency heating electrodes to apply a high-frequency voltage to the piece so that the foaming agent contained in the piece decomposes and foams to provide a product having a predetermined shape.
Claim 3
Dependent Claim
25 words
The method of claim 1, wherein said starting resinous material further comprises at least one additive selected from plasticizers, stabilizing agents, coloring agents and fillers.
Claim 4
Dependent Claim
54 words
A method according to claim 1, wherein said mold comprises upper and lower dies to define a molding cavity there between, and wherein a facing film is located in the molding cavity before the piece is located in the molding cavity to mold it, so that the product is laminated with the facing film.
Claim 5
Dependent Claim
24 words
A method according to claim 1 or 3, further comprising the step of degassing the piece when it is molded in the molding cavity.
Claim 6
Dependent Claim
27 words
A method according to claim 1, wherein said degassing holes extend in the piece and have a depth not less than half the thickness of the piece.
Claim 7
Dependent Claim
41 words
A method according to claim 4, wherein a non-adhereing netting is located between the upper and lower dies before the piece is located in the cavity, so that the piece comes into contact with the netting when the piece is molded.
Claim 8
Dependent Claim
14 words
A method according to claim 6, wherein the netting is a non-adhering woven fabric.
Claim 9
Dependent Claim
41 words
A method according to claim 3, wherein a non-adhering netting, is located between the upper and lower dies before the piece is located in the cavity, so that the piece comes into contact with the netting when the piece is molded.
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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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |