Patent US3905735A successfully refreshed from Google Patents.
US3905735A
Expired / Lapsed
US
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Stack molding apparatus
Assignee: Motors Liquidation Co
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Filing: 1974-09-11
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Granted: 1975-09-16
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Expires: 1994-09-11
Abstract
Abstract Pressed articles such as brake linings are made by a stack molding apparatus and method. Measured charges of moldable material are sequentially placed on top of a vertical stack between spacer plates and compressed. When a predetermined number of charges have been made and compressed in the stack, a fully compressed article has formed at the bottom of the stack. The lowermost fully compressed charge is then removed while alternately a new charge of moldable material and spacer plate are added to the top of the stack in a continuous sequence.
Inventors
- 👤 Douglas A Thomas
- 👤 Terry L Stambaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:25
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/02; B30B11/04; B30B11/06; B29; B29C; B29C43/00; Y; Y10; Y10S; Y10S425/00; Y10S425/054
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
Stack molding apparatus for compaction of moldable particulate material comprising: a vertically disposed open ended mold supported in spaced relation to a base plate, first transfer means for depositing a measured charge of said particulate material to be compacted into the top of said vertical mold, second transfer means for depositing a separator plate into the top of said mold, vertically movable ram means positioned over the top of said mold, ejector means slidably positioned on said base plate movable between a first position removed from said mold and a second position beneath said mold, control means for sequentially causing said first transfer means to deposit a charge of said material into the top of said vertical mold, for causing said second transfer means to deposit a separator plate over said charge, for causing said ram to subject said separator plate to pressure and for causing said ejector means to eject the lowermost separator plate and the lowermost compacted article from said stack by a movement thereof from said first position to said second position.
Claim 2
Dependent Claim
175 words
Stack molding apparatus for compaction of moldable particulate material comprising: a vertically disposed open ended mold supported in spaced relation to a base plate, first transfer means for depositing a measured charge of said particulate material to be compacted into the top of said vertical mold, second transfer means for depositing a separator plate into the top of said mold, vertically movable ram means positioned over the top of said mold, ejector means slidably positioned on said base plate movable between a first position removed from said mold and a second position beneath said mold, control means for sequentially causing said first transfer means to deposit a charge of said material into the top of said vertical mold, for causing said second transfer means to deposit a separator plate over said charge, for causing said ram to subject said separator plate to pressure and for causing said ejector means to eject the lowermost separator plate and the lowermost compacted article from said stack by a movement thereof from said first position to said second position.
Claim 3
Dependent Claim
199 words
Stack molding apparatus for compaction of moldable particulate material comprising: a vertically disposed open ended mold supported for slight vertical movement and in spaced relation to a base plate and means for raising said mold at least a slight amount, first transfer means for depositing a measured charge of said particulate material to be compacted into the top of said vertical mold, second transfer means for depositing a separator plate into the top of said mold, vertically movable ram means positioned over the top of said mold, ejector means slidably positioned on said base plate movable between a first position removed from said mold and a second position beneath said mold, control means for sequentially causing said first transfer means to deposit a charge of said material into the top of said vertical mold for causing said second transfer means to deposit a separator plate over said charge, for causing said ram to subject said separator plate to pressure, for causing said mold to be lifted slightly and for causing said ejector means to eject the lowermost separator plate and the lowermost compacted article from said stack by a movement thereof from said first position to said second position.
Claim 4
Dependent Claim
199 words
Stack molding apparatus for compaction of moldable particulate material comprising: a vertically disposed open ended mold supported for slight vertical movement and in spaced relation to a base plate and means for raising said mold at least a slight amount, first transfer means for depositing a measured charge of said particulate material to be compacted into the top of said vertical mold, second transfer means for depositing a separator plate into the top of said mold, vertically movable ram means positioned over the top of said mold, ejector means slidably positioned on said base plate movable between a first position removed from said mold and a second position beneath said mold, control means for sequentially causing said first transfer means to deposit a charge of said material into the top of said vertical mold for causing said second transfer means to deposit a separator plate over said charge, for causing said ram to subject said separator plate to pressure, for causing said mold to be lifted slightly and for causing said ejector means to eject the lowermost separator plate and the lowermost compacted article from said stack by a movement thereof from said first position to said second position.
Claim 5
Dependent Claim
194 words
Stack molding apparatus for compaction of moldable particulate material comprising: a vertically disposed open ended mold supported for slight vertical movement and in spaced relation to a base plate and means for raising said mold at least a slight amount, first transfer means for depositing a measured charge of said particulate material to be compacted into the top of said vertical mold, second transfer means for depositing a separator plate into the top of said mold, vertically movable ram means positioned over the top of said mold, ejector means slidably positioned on said base plate movable between a first position removed from said mold and a second position beneath said mold, control means for sequentially causing said first transfer means to deposit a charge of said material into the top of said vertical mold for causing said second transfer means to deposit a separator plate over said charge, for causing said ram to subject said separator plate to pressure while said ejector means is in said second position, for causing said mold to be lifted slightly, and for causing said ejector means to eject the lowermost separator plate and compacted article from said stack.
Claim 6
Dependent Claim
194 words
Stack molding apparatus for compaction of moldable particulate material comprising: a vertically disposed open ended mold supported for slight vertical movement and in spaced relation to a base plate and means for raising said mold at least a slight amount, first transfer means for depositing a measured charge of said particulate material to be compacted into the top of said vertical mold, second transfer means for depositing a separator plate into the top of said mold, vertically movable ram means positioned over the top of said mold, ejector means slidably positioned on said base plate movable between a first position removed from said mold and a second position beneath said mold, control means for sequentially causing said first transfer means to deposit a charge of said material into the top of said vertical mold for causing said second transfer means to deposit a separator plate over said charge, for causing said ram to subject said separator plate to pressure while said ejector means is in said second position, for causing said mold to be lifted slightly, and for causing said ejector means to eject the lowermost separator plate and compacted article from said stack.
Claim 7
Dependent Claim
204 words
Stack molding apparatus for compaction of moldable heat curable particulate material comprising: a heated vertically disposed open ended mold supported for slight vertical movement and in spaced relation to a base plate and means for raising said mold at least a slight amount, first transfer means for depositing a measured charge of said particulate material to be compacted into the top of said vertical mold, second transfer means for depositing a separator plate into the top of said mold, vertically movable ram means positioned over the top of said mold, ejector means slidably positioned on said base plate movable between a first position removed from said mold and a second position beneath said mold, control means for sequentially causing said first transfer means to deposit a charge of said material into the top of said vertical mold for causing said second transfer means to deposit a separator plate over said charge, for causing said ram to subject said separator plate to pressure, for causing said mold to be lifted slightly, and for causing said ejector means to eject the lowermost separator plate and at least partially cured compacted article from said stack by a movement thereof from said first position to said second position.
Claim 8
Dependent Claim
204 words
Stack molding apparatus for compaction of moldable heat curable particulate material comprising: a heated vertically disposed open ended mold supported for slight vertical movement and in spaced relation to a base plate and means for raising said mold at least a slight amount, first transfer means for depositing a measured charge of said particulate material to be compacted into the top of said vertical mold, second transfer means for depositing a separator plate into the top of said mold, vertically movable ram means positioned over the top of said mold, ejector means slidably positioned on said base plate movable between a first position removed from said mold and a second position beneath said mold, control means for sequentially causing said first transfer means to deposit a charge of said material into the top of said vertical mold for causing said second transfer means to deposit a separator plate over said charge, for causing said ram to subject said separator plate to pressure, for causing said mold to be lifted slightly, and for causing said ejector means to eject the lowermost separator plate and at least partially cured compacted article from said stack by a movement thereof from said first position to said second position.
References Cited (Backward Citations)
US1346158A
Cited
US1677200A
Cited
US2873475A
Cited
US2943347A
Cited
US2943353A
Cited
US3107141A
Cited
US3264388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |