Educational screen & audio-visual guide (c1956-1971])

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There Were ^ VENETIAN BLINDS in INDEPENDENCE HALL , * It's true, when the founders of this country were signing the Declaration of Independence, Venetian Blinds hung at the window. They were real fancy affairs for appearance but for mechanical oporatinn — prrtty clumsy. Thii fir^t advance away from the old fashion molhod of operating Venetian Blinds was the introduction of a tilt bar. Later '". K. Lorentzcn came out with the first enclosed head. Still made, of wnod. it was the foreiunner of today's fine metal head and bottom rail. Shown below. flcavv guage metal, full)/ enclosed tilter vith cord guides and short cord trai'el. Securely clinched in }ifad. . Special finger on tape drums ivill not cut tape. 3« No weight on the tilter. ► "D" rod, easily adjusted and centered. , Tape cradles securely inachined clinched in head. 6* Cord lock securely clitiched in head. *B. >ut this development did not come over night. Special equipment had to be designed to rollform these heads and bottom rail and special equipment had to be designed and manufactured for the cutting, lancing and punching of the metal head and — a special machine designed to CLINCH the hardware into the head. And therein lies the superiority of a LEVOLOR Venetian Blind over all others because the hardware is MACHINE CLINCHED — it is in there to stay and no weight or accidental dropping can make it pop out — only a special tool can remove the hardware in a LEVOLOR Venetian Blind. The finest of all Venetian Blinds ... the LEVOLOR Audio Visual ... is installed in the nation's finest schools. So tight is the closure — so accurate the adjustment — that the instructor or director can choose the ambient light best suited to pro.iector, subject or student activity. For more information -write to us at Levolor Lorentzen, Inc., 720 Monroe St., Hoboken, N. J. VENETIAN BLINDS Over 100 patents and refinements make Levolor Venetian Blinds better Educational Screen and Audiovisual Guide — July, 1962 351