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:
Nov. 30, 1993
Filed:
Nov. 05, 1991
Masaaki Munekata, Tokyo, JP;
Noriaki Tokuyama, Tokyo, JP;
Sanwa Shutter Corporation, Tokyo, JP;
Abstract
An architectural shutter curtain device having a train of a plurality of slats connected in series and adapted to be wound to form a plurality of turns on a take-up shaft of a polygonal shape having n apices. The width of the slats is varied in accordance with the change in the diameter of the wound shutter curtain device. In a group of n pieces of slats which form any one of the turns of the polygon formed when the shutter curtain device S is wound, the first to (n-2)-th slats and the n-th slat P.sub.n as counted from the winding start end have an equal width corresponding to the length of one side of the polygonal form, while the (n-1)-th slat of the group has the same width as the first to (n-2)-th slats of the group of n pieces of slats which form the next turn of a polygonal form of an increased size. The take-up shaft for winding the shutter curtain device thereon is so constructed that the hinges on the leading ends of the first to (n-2)-th slats of the successive turns are superposed on radial lines interconnecting the center of the polygonal form and the first to (n-1) apices of the polygonal form, while the hinges between the (n-1)-th slat and the n-th slates of the successive turns are superposed along a line which extends in parallel with a radial line passing through the center of the polygonal form and the n-th apex of the same.