Abstract: A clamp for clamping a plurality of strips of compressible material together comprising, a resiliently rigid plate member; a pair of vertical bar members carried by the plate member normal thereto and disposed parallel to one another at a distance generally equal to the width of the strips to be clamped together; a horizontal bar member shorter in length than the distance and disposed in parallel, spaced relationship to the plate member; and, a pair of joining bar members connected between respective ones of the ends of the vertical bar members and the horizontal bar member, the joining bar members forming and angle of between 120.degree. and 150.degree. with the horizontal bar member; and wherein, the vertical bar members, the horizontal bar member, and the joining bar members are of a resiliently rigid and deformable material.