Tube compressing roller die

Metal deforming – By use of roller or roller-like tool-element – Included in roller-cluster

Reexamination Certificate

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Details

C072S370260

Reexamination Certificate

active

06865918

ABSTRACT:
A tube reduction apparatus uses a pair of plates, each of the plates providing an X-shaped aperture therein. The X-shaped aperture comprises two pairs of opposing slots, and each slot provides a pair of opposing grooves. The grooves are oriented at right angles to the slots. The pair of plates are in face to face contact with the X-shaped apertures, grooves and slots aligned. A set of four wheels are mounted on transverse axles which are captured in the grooves with the wheels positioned in the slots. A V-shaped concave annular face has an has a semi-circular annular notch at its apex. The four wheels are positioned such that their edges are in mutual adjacency forming a square passage therebetween them.

REFERENCES:
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patent: 3736846 (1973-06-01), Frankenberg
patent: 4255956 (1981-03-01), Zacharias
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patent: D397601 (1998-09-01), Omerza
patent: D400895 (1998-11-01), Schrepfer
patent: 5907969 (1999-06-01), Soder
patent: 6397650 (2002-06-01), Sakurai et al.
patent: 06330177 (1994-11-01), None
patent: 07116708 (1995-05-01), None
patent: 07144223 (1995-06-01), None
patent: 09122748 (1997-05-01), None

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