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US 5,096,648 AGranted
Method of manufacturing precast concrete articles
AssigneeJohnson Brothers Precision Precast Products, Inc.
InventorsDavid L. Johnson, Robert A. Johnson
Life of this patent
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Abstract
A method for producing concrete paving stones includes slidably mounting paving stone molds in a vertical row in a rack; sliding one mold to a different depth in the rack; filling the mold with concrete; sliding the mold to its original position; and filling the other molds in a similar manner.
Claims8
A method for molding concrete paving stones, comprising the steps of:
- (1) slidably and horizontally mounting a plurality of precast concrete article molds, each having a top opening and a bottom portion, on rails in a rack;
- (2) positioning one of said molds at a first horizontal depth on said rails in said rack such that at least a portion of said top opening of said first mold is unobstructed by the other said molds;
- (3) pouring uncured concrete into said first mold;
- (4) sliding said first mold along said rails to a second horizontal depth in said rack for curing of said poured concrete;
- (5) sufficiently supporting said first mold along an edge portion of said bottom portion of said first mold with said rails so that said first mold remains in a horizontal plane at said first depth and said second depth when said first mold contains concrete;
- and
- (6) repeating steps (2) through (5) for each of said other molds.
4 more elements
Dependencies are inferred from the claim text.