Duct board assembly

Details Duct board assembly Duct board assembly

1977-04-27

1980-01-15

Aegerter, Richard E.

Pipes and tubular conduits

Longitudinally seamed

Sectional

138149, 138161, F16L 5914

Patent

active

041833791

ABSTRACT:
Disclosed is a duct board assembly which comprised a panel of conventional duct board formed of rigid thermal insulation to which is attached boardering strips on one face of the panel; the panel may be provided with spaced, longitudinal grooves to define the wall widths of an air duct section to be formed from the duct board assembly and the outer margins of said panel-framing strips being provided with locking means to provide a closed longitudinal seam for the air duct section and to provide for closed joining, end-to-end, of successive duct sections.

REFERENCES:
patent: 1297591 (1919-03-01), Prescott
patent: 1734209 (1929-11-01), Huffine
patent: 2389468 (1945-11-01), Terry
patent: 2627430 (1953-02-01), Koffler
patent: 2634760 (1953-04-01), Williams
patent: 2916054 (1959-12-01), Callan
patent: 3092529 (1963-06-01), Pearson
patent: 3251382 (1966-05-01), Tatsch
patent: 3422525 (1969-01-01), Jeppsson
patent: 3614967 (1971-10-01), Royston
patent: 3682163 (1972-08-01), Plummer
patent: 3925856 (1975-12-01), Plummer
patent: 3941159 (1976-03-01), Toll

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