Attaching assembly for sheet material

Claim 1

In combination: a sheet material securement including: an elongated base having a longitudinally extending channel formed therein and of generally C-shaped transverse cross section for receiving therein a marginal portion of the sheet material, said channel presenting a normally uppermost bight section and a normally horizontally disposed mouth; an elongated interlocking element having a generally L-shaped transverse cross section and complementally receivable within said channel, said element having a first leg partially received by said bight section of the channel and a second leg partially received by said mouth; a tool receiving groove formed in said second leg and extending parallel to the longitudinal axis of said element, the depth-wise axis of the groove extending obliquely of said element when the element is received within the channel whereby to incline said groove downwardly in a direction extending from said first leg through said second leg; and a tool for said securement having an elongated blade receivable within said groove to provide leverage for insertion and removal of said element with respect to said channel.