Variable screening

摘要

In one embodiment, a variable screen includes a generally flat sheet having a front surface, a back surface, and a plurality of elongated slits that extend through the sheet from the front surface to the back surface, wherein the sheet includes a shape memory material that enables the slits to open into openings through which light and fluid can pass when a tensile force is applied to the sheet in a direction generally perpendicular to the slits and further enables the slits and openings to automatically when the tensile force is removed.

主权项

1. A variable screen comprising:
a generally flat sheet having a front surface and a back surface, the sheet comprising a plurality of elongated strips of textile material that are connected to each other at discrete connection points along their lengths so as to define a plurality of elongated slits that extend through the sheet from the front surface to the back surface; and shape memory elements that extend along opposed edges of the strips in a longitudinal direction of the strips; wherein the slits are adapted to open into passages through which light and fluid can pass when a tensile force is applied to the sheet in a direction generally perpendicular to the slits and automatically close when the tensile force is removed.