Patent US4231987A successfully refreshed from Google Patents.
US4231987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stripping a molded article
Assignee: TDK Corp
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Filing: 1978-07-17
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Granted: 1980-11-04
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Expires: 1998-07-17
Abstract
Abstract A molding method comprises a step of fitting a movable mold to a stationary mold and filling a molten resin into a cavity formed by the mold fitting; a step of separating the movable molds; a step of releasing a molded product held by one or more push pins while shifting the push pins; a step of holding the molded product by a guide having a .]. shaped sectional view; and a step of releasing the molded product from the push pins to pass the molded product along the guide having a .]. shaped sectional view.
Inventors
- 👤 Masayuki Osawa
- 👤 Masaoki Sekine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:41
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/1769; B29C45/1771; B29C31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A molding method comprising the steps of: contacting a stationary mold with a movable mold to form a mold cavity, said mold cavity having at least one push pin extending therein by a slight distance; filling said mold cavity with molten resin to form a molded product; separating said stationary and movable molds; extending said at least one push pin to separate said molded product from said core; holding said separated molded product by said at least one push pin; moving a pair of oppositely oriented guide rails having .]. shaped sections adjacent said molded products being held by said at least one pin; and retracting said at least one pin to release said molded product from said at least one pin whereby said molded product may be guided by said pair of guide rails.
Claim 2
Dependent Claim
135 words
A molding method comprising the steps of: contacting a stationary mold with a movable mold to form a mold cavity, said mold cavity having at least one push pin extending therein by a slight distance; filling said mold cavity with molten resin to form a molded product; separating said stationary and movable molds; extending said at least one push pin to separate said molded product from said core; holding said separated molded product by said at least one push pin; moving a pair of oppositely oriented guide rails having .]. shaped sections adjacent said molded products being held by said at least one pin; and retracting said at least one pin to release said molded product from said at least one pin whereby said molded product may be guided by said pair of guide rails.
References Cited (Backward Citations)
US3910740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |