Method of creating integral spacers in reinforcing bars...

Metal deforming – By use of non-deforming work-gripping clamp and relatively... – By individually non-deforming clamps

Reexamination Certificate

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C140S107000

Reexamination Certificate

active

07082802

ABSTRACT:
The present invention relates to an apparatus and method for selectively producing a deformation in a reinforcing frame employed in the fabrication of concrete pipes or other similar construction materials. The deformation maintains the frame in the proper predetermined location inside the concrete form during fabrication to thus produce a concrete pipe with optimum structural properties.

REFERENCES:
patent: 1720183 (1929-07-01), Parmer
patent: 2650637 (1953-09-01), Paxson
patent: 3192962 (1965-07-01), First et al.
patent: 3561501 (1971-02-01), Fauteux
patent: 4515004 (1985-05-01), Jaenson
patent: 5724852 (1998-03-01), Lee

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