Electric projection screen roller and balance rod assembly

Details Electric projection screen roller and balance rod assembly Electric projection screen roller and balance rod assembly

2005-04-05

2005-04-05

Dowling, William C. (Department: 2851)

Optical: systems and elements

Projection screen

Roll up screen

C160S903000, C160SDIG001, C160S023100

Reexamination Certificate

active

06876493

ABSTRACT:
An electric projection screen roller and balance rod assembly. The electric projection screen roller and balance rod assembly includes a projection screen roler assembly and a balance rod assembly. The projection screen roler assembly is composed by a main body and an inserting piece, and the projection screen balance rod assembly is composed by a left half portion and a right half portion. A curved against member of the inserting piece is provided to be caught in the inlaying socket of the main body, so as for the upper end section of a projection screen to be firmly secured between, and the lower end section of the projection screen is firmly secured between the left and right half portions of the projection screen balance rod.

REFERENCES:
patent: 4597430 (1986-07-01), Marquez
patent: 5296964 (1994-03-01), Shopp
patent: 5647421 (1997-07-01), Hoffmann et al.
patent: 6111694 (2000-08-01), Shopp

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