The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1994
Filed:
May. 26, 1993
Rick A Shopp, Spiceland, IN (US);
Draper Shade & Screen Co., Inc., Spiceland, IN (US);
Abstract
An electrically actuated trap door system for a projection screen case. The system includes a trap door having first and second opposing edges. The first edge of the trap door is pivotally connected to the case such that the trap door is movable between a closed position in which the trap door is substantially flush with the bottom surface of the case and an open position in which the second edge of the trap door is disposed within the interior of the housing to form an opening in the bottom surface of the case. A motorized roller rotatable in first and second directions about its longitudinal axis is disposed within the case, and a ribbon connects the trap door and the roller to translate the rotation of the roller into movement of the trap door between its closed position and its open position.