Duct core with strengthening tape

Details Duct core with strengthening tape Duct core with strengthening tape

1988-06-20

1992-12-01

Bryant, III, James E.

Pipes and tubular conduits

Flexible

Spirally wound material

138122, 138119, 138134, F16L 1108

Patent

active

051672600

ABSTRACT:
Strengthening the core of an insulated flexible duct formed of a helical wire wrapped with a flexible material with reinforcing tape. Strengthening tape is applied to the surface of the duct along its entire length. The apparatus for applying the strengthening tape is a tray having adjustable wiping arms. The wiping arms stretch the duct out as it is pulled through the tray. A roll of tape is mounted adjacent to the wiper arms and is automatically applied as the duct is pulled along the tray through the wiper arms. At least two wiper arms and continuous strips of tape along the longitudinal surface of the duct core are preferred.

REFERENCES:
patent: 14046 (1916-01-01), Joseph
patent: 1882151 (1932-10-01), Logerblade
patent: 2365286 (1944-12-01), Moseley et al.
patent: 2401949 (1946-06-01), Mariner
patent: 4098298 (1978-07-01), Vohrer
patent: 4172474 (1979-10-01), Stahl
patent: 4224463 (1980-09-01), Koerber et al.

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