Rib form for tank ribs

Details Rib form for tank ribs Rib form for tank ribs

1986-06-06

1988-10-18

Pollard, Steven M.

Receptacles

Outlet or junction box type

Sectional receptacle

229DIG1, 220 83, B65D 746

Patent

active

047780754

ABSTRACT:
The rib form comprises a cardboard blank folded into a trapezoidal shape and having overlapping opposite longitudinal edge portions of the blank glued together and forming the shorter of the two parallel sides of the trapezoidal shape. Peripheral slots evenly spaced along the rib form are cut through the longer of the parallel sides and through the two angular sides of the trapezoidal shape.

REFERENCES:
patent: 3394841 (1968-07-01), Anderson
patent: 3529987 (1970-09-01), Lemelson
patent: 3661294 (1972-05-01), Pearson et al.
patent: 3708101 (1973-01-01), McDanield

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