Blank holder having variable assembly

Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Clamp structure constitutes sole initial metal-deforming...

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Details

72478, 72413, B21D 504, B21D 1120

Patent

active

056426399

ABSTRACT:
A blank holder having variable assembly is used in a folding machine for the production of a sheet panel. It comprises a central element (3), a plurality of additional elements (6), a pair of expander elements (4), two extremity members (7), at least one programmable carriage (15) movable along the blank holder which is operable to modify the length of the blank holder.

REFERENCES:
patent: 4532792 (1985-08-01), Hongo
patent: 4660402 (1987-04-01), Hongo
patent: 4722214 (1988-02-01), Hayashi et al.
patent: 4930332 (1990-06-01), Hongo

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