Molding process for forming a concrete paving block
April 30, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3883109 3904791 Method for the manufacture of concrete and like products Reinforced plastic mold for concrete panels Cements, mortars and concretes Pot hole filler material and method of filling same Methods of making cementitious compositions from waste products Grouting composition comprising slag Concrete impression system Composite masonry block mold for use in block molding machines Patent #: 5062610 InventorApplicationNo. 693672 filed on 04/30/1991US Classes:264/71, By reciprocating or vibrating mold249/13, Forming building structure249/127, Mold or mold part of flexible material to facilitate product removal249/139, Including means securing molding device to detachable, separate and distinct support264/333, Inorganic hydraulic settable material shaping404/42PatternedExaminersPrimary: Britts, Ramon S.Assistant: Connolly, Nancy P. Attorney, Agent or FirmForeign Patent References
International ClassesE01C 005/00B28B 007/22 B28B 003/00 AbstractA molded and cured concrete paving member for paving driveways, walkways, patios, plazas and the like, comprising portland cement, a coal slag aggregate, water and an acrylic additive. The blend is poured into a non-porous, high gloss polyvinylchloride (PVC) mold in a relative dry mix and is vibrated to drive the portland cement to the bottom of the mold and to suspend the aggregate into chemical suspension. This also drives the lighter weight water to the top of the molding configuration, which top, due to the configuration or orientation of the mold, ultimately becomes the bottom of the paving member. The molding is accomplished while hanging from a frame in a so-called bag mold so that when the concrete expands and contracts in the relatively flexible mold during the hydration curing process a bond of the concrete to the PVC mold is maintained. The non-porosity of the high gloss mold surface and induced vibration pull the portland cement to the bottom of the mold cavity and suspend the aggregate. This, then, gives rise to an advantageous high gloss ceramic-like finish.Field of SearchHeatingPatterned Bevel or incline edge Modules or blocks (preformed) Foraminous traffic surface Slag containing (e.g., blast furnace slag, etc.) Portland type cement MISCELLANEOUS MOLD ADJUNCTS Forming building structure Including means securing molding device to detachable, separate and distinct support Including means other than mold surface to support preform INCLUDING STATIC FILLING MEANS IN CONTACT WITH MOLD CAVITY CONTAINER-TYPE MOLDING DEVICE Mold or mold part of flexible material to facilitate product removal HAND MOVABLE, SUBSTRATE TRAVERSING, PLURAL DIMENSION SHAPING MEANS Including tamper MEANS TREATING SHAPED WORK WITH TRANSPORTATION DEVICE FOR RELOCATING MOLDING APPARATUS TO DIFFERENT SITE (E.G., LAND VEHICLE, ETC.) BUILDING FORMS OR CONSTRUCTION ENGINEERING TYPE MOLD WITH REPOSITIONING MEANS FOR PROGRESSIVE MOLDING Inorganic hydraulic settable material shaping By reciprocating or vibrating mold | |
