System for maintaining alignment of roll-up blind slats

Details System for maintaining alignment of roll-up blind slats System for maintaining alignment of roll-up blind slats

1993-11-24

1994-09-06

Purol, David M.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Movably interconnected

160236, E06B 916

Patent

active

053439244

ABSTRACT:
A roll-up, horizontally elongated, slat-type blind is formed of elongated slats which are hingedly connected together along their longitudinal edges. The slats are formed with upper flanges that are bent into downwardly opening flange hooks which extend into channels formed on the lower edges of the next adjacent slats. Each channel has an upwardly opening hook formed on one wall of the channel, and an opposite wall portion adjacent the hook. The flange hooks are notched at their opposite ends and the portions of the channel wall which overlap the notches are bent into tabs which extend inwardly to close the channel and to engage the opposite ends of the notches of the hook portions. Thus, the flange hooks are precluded from shifting endwise by the tabs to, thereby, maintain the slats in alignment at all times.

REFERENCES:
patent: 1790028 (1931-01-01), Stevenson
patent: 2569621 (1951-10-01), Toney
patent: 2572257 (1951-10-01), Gerner et al.
patent: 2583878 (1952-01-01), Plym
patent: 2812813 (1957-11-01), Zarnowski
patent: 4173247 (1979-11-01), Piana
patent: 4343340 (1982-08-01), Paule
patent: 4428218 (1984-01-01), LaRocca
patent: 4470444 (1984-09-01), Riexinger et al.
patent: 4601953 (1986-07-01), Haffer
patent: 4723588 (1988-02-01), Ruppel

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