Patent US4759465A successfully refreshed from Google Patents.
Patent US5090890A successfully refreshed from Google Patents.
US5090890A
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US
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Injection mold having a valve gate system
Assignee: Fuji Photo Film Co Ltd
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Filing: 1990-10-16
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Granted: 1992-02-25
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Expires: 2010-10-16
Abstract
Abstract An injection mold has a valve gate system in which a valve pin is moved through a runner into and away from a gate to open and close the gate. The valve pin is inserted into the gate to close it after each injection stroke and the end face of the valve pin defines a part of the surface of an injection-molded article when the valve pin is in the gate. The end face of the valve pin is provided with a designed irregularity.
Inventors
- 👤 Kiyoo Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:02
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/28; B29C45/2806; B29C45/37; B29C45/372
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
An injection mold having a valve gate system including a runner and a valve pin slidably disposed in said runner so as to be movable into and away from a gate to open and close the gate, the valve pin being inserted into the gate to close said gate after each injection stroke and an end face of the valve pin defining a part of the surface of an injection-molded article when the vale pin is in the gate, said end face comprising means for concealing a sinkmark produced on a surface of said molded article opposite said valve pin, said concealing means including a predetermined design irregularity provided on said end face of the valve pin.
Claim 2
Dependent Claim
117 words
An injection mold having a valve gate system including a runner and a valve pin slidably disposed in said runner so as to be movable into and away from a gate to open and close the gate, the valve pin being inserted into the gate to close said gate after each injection stroke and an end face of the valve pin defining a part of the surface of an injection-molded article when the vale pin is in the gate, said end face comprising means for concealing a sinkmark produced on a surface of said molded article opposite said valve pin, said concealing means including a predetermined design irregularity provided on said end face of the valve pin.
Claim 3
Dependent Claim
23 words
An injection mold as defined in claim 1 in which said design irregularity is embossed on said end face of the valve pin.
Claim 4
Dependent Claim
35 words
An injection mold as defined in claim 1 in which said designed irregularity provides information on the surface of the molded article when said designed irregularity is transferred to the surface of the molded article.
References Cited (Backward Citations)
US4781572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |