Patent ID: 6256955
Filing Date: 2001-07-10
Classification: E04B

Abstract:
An apparatus adapted to collect and retain debris within a masonry-cavitywall made up of an inner wall having a first interior wall surface, an outer wall having a second interior wall surface, and an air-cavity between said first interior wall surface and said second interior wall surface, said air-cavity having a cavity-depth defined by a separation between said first interior wall surface and said second interior wall surface, said apparatus comprising:a planar sheet of fibrous mesh screen, said mesh screen being fabricated from a nonabsorbent, non-degradable material, said planar sheet having a first sheet surface and a second sheet surface, said planar sheet further being substantially quadrilateral; anda plurality of nodes disposed on said sheet, wherein each node of said plurality of nodes has a node tip, a node width, a node depth, and a node height, wherein said node width is defined by a width of a pair of substantially planar node surfaces and said node depth by a distance that said planar node surfaces extend outward from said first sheet surface to said node tip, wherein said node depth is adapted to be substantially equal to a cavity depth in a masonry-wall cavity,wherein said pair of substantially planar surfaces includes an upper planar surface and a lower planar surface, wherein said node has a node base on said first sheet surface, and wherein said upper planar surface and said lower planar surface extend outward from said base and slope toward each other toward said node tip, andwherein said node forms a recess on said second sheet surface.