a frame includes longitudinal members secured to one another . the longitudinal members support a spline that is normally open in a first position to provide a cavity . a fabric , such a mesh screen , is arranged over the frame so that the perimeter of the screen is received within the cavities of the longitudinal members . a movable platen is actuated to engage the spline . the splines are forced into the cavities to a second position in which the perimeter of the screen is pinched between a corner of the splines and the longitudinal members . a nose of the splines , which includes the corner , is retained in a channel of the longitudinal members .