Patent US3877862A successfully refreshed from Google Patents.
US3877862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feeder for multi-cavity compression molding apparatus
Assignee: Arkema Inc
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Filing: 1973-11-16
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Granted: 1975-04-15
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Expires: 1993-11-16
Abstract
Abstract Apparatus for feeding thermosetting material into multi-cavity compression molding presses includes a plurality of tiltable troughs which are reciprocable from a loading position where they are charged to a dispensing position where they discharge their contents into the cavities. During discharge the troughs are automatically rotated through 180* to dump their contents, usually plasticized preformed masses.
Inventors
- 👤 Paul Francis Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:09
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/34; B29C31/00; B29C31/04; B29C33/00; B29C33/0022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
Apparatus for feeding preformed masses of plastic material into multi-cavity compression molding presses, comprising: a frame, a plurality of horizontally spaced troughs rotatably supported in said frame, means for compartmentalizing said troughs in correspondence with the mold cavities, means for reciprocating said frame from a loading position in which the preformed masses are dispensed into said troughs to a discharging position in which the troughs are located over the mold cavities, and means for rotating said troughs through 180* to dump the preformed masses into the mold cavities when said frame is in the discharging position.
Claim 2
Dependent Claim
96 words
Apparatus for feeding preformed masses of plastic material into multi-cavity compression molding presses, comprising: a frame, a plurality of horizontally spaced troughs rotatably supported in said frame, means for compartmentalizing said troughs in correspondence with the mold cavities, means for reciprocating said frame from a loading position in which the preformed masses are dispensed into said troughs to a discharging position in which the troughs are located over the mold cavities, and means for rotating said troughs through 180* to dump the preformed masses into the mold cavities when said frame is in the discharging position.
Claim 3
Dependent Claim
29 words
The apparatus of claim 1 wherein said means for compartmentalizing comprise partition plates laterally spaced from each other by a distance corresponding to the width of the mold cavities.
Claim 4
Dependent Claim
12 words
The apparatus of claim 2 wherein said partition plates are laterally adjustable.
Claim 5
Dependent Claim
17 words
The apparatus of claim 1 wherein said means for rotating said troughs comprises a rack and pinion.
Claim 6
Dependent Claim
22 words
The apparatus of claim 4 wherein said rack is actuated by a stop at a predetermined position during advancement of said frame.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |