Plastic article or earthenware shaping or treating: apparatus – Female mold – pallet handling means and means to charge... – Pallet supported within mold sidewalls by vertically movable...
Reexamination Certificate
2006-01-27
2009-12-22
Gupta, Yogendra (Department: 1791)
Plastic article or earthenware shaping or treating: apparatus
Female mold, pallet handling means and means to charge...
Pallet supported within mold sidewalls by vertically movable...
C425S421000, C425S424000, C425S432000, C425S456000
Reexamination Certificate
active
07635261
ABSTRACT:
A concrete products forming machine including a main frame, feed drawers, die supports and mold and head assemblies. The feed drawer is moved into position over the mold using an electric belt drive system and includes a vibrating strike off plate to improve surface quality of the molded product, zoned agitators to control movement and placement of concrete, a spring loaded seal system between the walls and floor of the feed box, and quick-release agitator design with urethane sleeves to effect easy and clean removal, replacement and cleaning of the agitators. The concrete products forming machine includes torque tube and leaf spring supports to effect substantially vertical vibrational movement of the mold with air inflatable springs for controlled force between the mold bottom and the pallet. The pallet itself is vibrated from below using phased, counter rotating shafts coupled to the pallet table on which the pallet rests. Vibration induced into the pallet by the vibrating pallet table is transferred to the mold resulting in material compaction. After the molding process, the mold is lifted in a stripping process to remove the molded product for curing or drying.
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Brewer Keith Donald
Gildersleeve Stacy L.
High Douglas Vernon
Johnston Llewellyn Lee
Wahlstrom Daniel Richard
Columbia Machine, Inc.
Gupta Yogendra
Marger & Johnson & McCollom, P.C.
Nguyen Thu Khanh T
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