Filter assembly with supporting edges

Claim 1

A filter assembly which is adapted to be mounted on a receptacle, comprising: a sheet in the form of a resilient, manually deformable generally rectangualr support plate having transverse end edges and longitudinal side edges and an intermediate portion defining an opening therein for pouring hot water therethrough, said support plate including a grasping means for securely mounting said support plate on the receptacle, said grasping means including a generally U-shaped slot therein, adjacent to but spaced from a support plate end edge said slot having a bottom portion extending parallel to the support plate end edge and a pair of wing portions each extending substantially toward said intermediate portion; said grasping means including an outer nipping strip formed by that portion of said support plate located between said end edge and said slot bottom portion and being continuous from one support plate side edge to the other whereby said outer nipping strip is continuous and includes essentially the entire support plate end edge, said grasping means further including an inner nipping tongue separated from said outer nipping strip by said slot, said inner nipping tongue being shaped to conform with the shape of said slot and being co-planar with said outer nipping strip when said support plate is in a planar configuration so that when said outer nipping strip is positioned on one side of the receptacle and said inner nipping tongue is positioned on another side of the receptacle, the resilient nature of said support plate tends to force said inner nipping tongue against the receptacle and tends to force said outer nipping strip against the receptacle at essentially all locations adjacent to said inner nipping tongue whereby said outer nipping strip cooperates with essentially all of said inner nipping tongue to securely grasp the receptacle; and a sack of filter paper covering the opening in the intermediate portion.