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US 5,143,344 AGranted
Apparatus for manufacturing precast concrete articles
AssigneeJohnson Brothers Precision Precast Products, Inc.
InventorsDavid L. Johnson, Robert A. Johnson
Life of this patent
Estimating the term…
Abstract
A system for molding concrete articles such as paving stones, including a rack having opposing first and second vertical walls that have corresponding rails, and trays that include article molds adapted to receive concrete for curing, the trays being sized and constructed to slide on the rails.
Claims7
A system for molding precast concrete articles comprising:
- a) a rack comprising a first vertical wall member including a first set of generally horizontal, spaced apart rails, and a second vertical wall member opposing said first wall member and including a second set of generally horizontal, spaced apart rails corresponding to said first set of rails, said first and second wall members having first and second constant widths, respectively, said second width being less than said first width;
- and
- b) a tray containing one or more precast concrete article molds slidably mounted on said rails.
Dependencies are inferred from the claim text.