Corrugated tube, apparatus for perforating corrugated tube...

Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition

Reexamination Certificate

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Reexamination Certificate

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07435899

ABSTRACT:
A corrugated tube, an apparatus and method for perforating the corrugated tube. The corrugated tube includes a tubular body having large and small diameter portions and a longitudinal slit formed along a generating line of the tube body. The tube includes a communication hole formed generally in the large-diameter portions. A tube guide is provided in the apparatus for guiding the tubular body during the process of forming the perforations.

REFERENCES:
patent: 3694563 (1972-09-01), Monds et al.
patent: 3877831 (1975-04-01), Maroschak
patent: 4513787 (1985-04-01), Hegler et al.
patent: 6034329 (2000-03-01), Kawamura
patent: 6078009 (2000-06-01), Kawamura
patent: 6843276 (2005-01-01), Tadokoro
patent: 6938645 (2005-09-01), Duarte et al.
patent: 2002/0185190 (2002-12-01), Tadokoro
patent: 2000-261932 (2000-09-01), None
patent: 2001-260072 (2001-09-01), None
patent: 2003-309918 (2003-10-01), None

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