Device for shaping corrugated fin

Metal deforming – By relatively movable offset tool-faces – Multi-point tool-couple

Reexamination Certificate

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Details

C072S379600, C072S180000, C072S184000

Reexamination Certificate

active

11414258

ABSTRACT:
The configuration comprises a shaping member3having a substantially rectangular shape and shaping the inner surface side of a bent portion1b, a worm gear2slidably linked with the shaping member3and gradually reducing the distance between the shaping members3for sequentially feeding the shaping member3from one side to the other side, and a reference member4arranged so that the upper end surface of the bent portion1bcomes into contact with its reference surface, and the distance between the shaping members3is gradually reduced to a predetermined fin pitch and the upper end surface of the bent portion1bis shaped into a predetermined shape by rotating the worm gear2after the plurality of bent portions1bare arranged at the shaping members3. Due to this, it is possible to shape the bent portion into a continuous and stable shape.

REFERENCES:
patent: 3670781 (1972-06-01), Liouville
patent: 3724538 (1973-04-01), Yamaguchi et al.
patent: 3850018 (1974-11-01), Drosnin
patent: 4523500 (1985-06-01), Maruyama
patent: 5176020 (1993-01-01), Maruo et al.
patent: 5819575 (1998-10-01), Kobayashi et al.
patent: 6430983 (2002-08-01), Nozaki et al.
patent: 58055118 (1983-04-01), None
patent: 60234724 (1985-11-01), None
patent: 04172139 (1992-06-01), None
patent: A 08-261678 (1996-10-01), None

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