US4898706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing molded articles with uneven pattern
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1988-10-06
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Granted: 1990-02-06
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Expires: 2008-10-06
Abstract
Abstract A process for producing a synthetic resin molded article having a pattern formed on its uneven surface, which comprises fitting a patterned film or sheet to a mold and injecting a thermoplastic resin, wherein said mold has engraved therein such an unevenness that said patterned film or sheet undergoes extension of from 5 to 120% upon resin injection, and said patterned film or sheet is a polycarbonate film or sheet having a thickness of from 0.1 to 1 mm. The resulting molded article has a clearly outlined pattern on the uneven surface.
Inventors
- 👤 Seizo Yabe
- 👤 Kunio Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:37
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/1418; B29C45/14688; B29C45/14778; B29C45/14811; B29C45/14836; B29C2045/14844; B29K; B29K2633/00; B29K2633/04; B29K2633/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A process for producing a synthetic resin molded article having a pattern formed on its uneven surface, which comprises fitting a patterned film or sheet to a mold and injecting a thermoplastic resin, wherein said mold has engraved therein a sharp unevenness such that said patterned film or sheet undergoes extension of from 5 to 120% upon resin injection, said patterned film or sheet is a polycarbonate film or sheet having a thickness of from 0.3 to 1 mm, and said polycarbonate film or sheet has formed a pattern on its side to be in contact with the engraved side of the mold so that the pattern does not directly contact the injected resin.
Claim 2
Dependent Claim
114 words
A process for producing a synthetic resin molded article having a pattern formed on its uneven surface, which comprises fitting a patterned film or sheet to a mold and injecting a thermoplastic resin, wherein said mold has engraved therein a sharp unevenness such that said patterned film or sheet undergoes extension of from 5 to 120% upon resin injection, said patterned film or sheet is a polycarbonate film or sheet having a thickness of from 0.3 to 1 mm, and said polycarbonate film or sheet has formed a pattern on its side to be in contact with the engraved side of the mold so that the pattern does not directly contact the injected resin.
Claim 3
Dependent Claim
52 words
The process as claimed in claim 1, wherein said polycarbonate film or sheet has formed a pattern on its side which is not in contact with the mold and also has provided on the pattern thereof a transparent protective layer so that the pattern may not directly contact with the injected resin.
Claim 4
Dependent Claim
53 words
The process as claimed in claim 1, wherein said thermoplastic resin is selected from the group consisting of an acrylic resin, polystyrene, as methyl methacrylate-styrene copolymer, and an acrylonitrile-styrene copolymer, and said polycarbonate film or sheet has provided an acrylic resin layer on its side to be in contact with said injected resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |