US3685939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold separating apparatus
Assignee: ROBINSON RUBBER PRODUCTS Co Inc
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Filing: 1970-07-29
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Granted: 1972-08-22
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Expires: 1990-07-29
Abstract
Abstract The main ram of a press advances a bottom mold plate toward a fixedly located top mold plate. During the advancing stroke, a third or floating plate is engaged by the bottom mold plate and urges it upwardly into juxtaposition with the top plate. Attached so as to be movable in unison with the third or floating plate (or with any additional such plates when employed) are a number of shuttle bars having stops at one end thereof that are shifted so as to be engaged by the supporting frame for the bottom plate during the return stroke of the ram. In this way, the third plate is forcibly separated from the top plate during the retraction of the bottom plate. A frictional drag is imposed on the shuttle bars, there being a brake device for each shuttle bar.
Inventors
- 👤 Thomas A Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:25
CPC Classifications
B; B29; B29C; B29C43/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
183 words
Mold apparatus comprising a first mold plate, first means for supporting said first mold plate, a second mold plate, second means for advancing and retracting said second mold plate toward and away from said first plate, a third mold plate, third means for movably mounting said third mold plate between said first and second means so that said second plate engages said third plate after sufficient advancement of said second plate has occurred whereby further advancement of said second plate causes said third plate to be moved toward said first plate, means engageable by said second means during the retraction thereof for separating said third plate from said first plate after completion of a molding operation, said separating means including an elongated member fixedly attached to said third means so as to be movable in unison therewith and a stop member near one end of said elongated member, said second means engaging said stop member during its retraction to cause separation of said third plate from said first plate, and brake means cooperable with said elongated member for imposing a frictional drag thereon.
Claim 2
Dependent Claim
183 words
Mold apparatus comprising a first mold plate, first means for supporting said first mold plate, a second mold plate, second means for advancing and retracting said second mold plate toward and away from said first plate, a third mold plate, third means for movably mounting said third mold plate between said first and second means so that said second plate engages said third plate after sufficient advancement of said second plate has occurred whereby further advancement of said second plate causes said third plate to be moved toward said first plate, means engageable by said second means during the retraction thereof for separating said third plate from said first plate after completion of a molding operation, said separating means including an elongated member fixedly attached to said third means so as to be movable in unison therewith and a stop member near one end of said elongated member, said second means engaging said stop member during its retraction to cause separation of said third plate from said first plate, and brake means cooperable with said elongated member for imposing a frictional drag thereon.
Claim 3
Dependent Claim
72 words
Mold apparatus in accordance with claim 1 in which said brake means engages said elongated member near one end thereof to impart said frictional drag, and said second means includes a block member slidably engaging said elongated member near the other end thereof so as to permit said second means to move freely therealong when said second means is advanced and to abut said stop member during retraction of said second means.
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |