Buckle

Claim 1

A plastic buckle adapted to adjustably secure the extremities of a length of web-like material having a predetermined thickness, said buckle including a frame-like body portion having sides and ends defining an upper and lower face of said buckle, fastening means at one end of said body portion for fixedly securing the buckle to one extremity of said web-like material, means for adjusting the opposite extremity of said web-like material including at least two transverse parallel bars positioned adjacent the opposite end of said body portion with said bars having web engaging surfaces lying in different planes generally falling on said upper and lower faces of said buckle, a first one of said bars forming the end of said frame-like body portion, said first bar having a substantially flat first surface lying substantially on said lower face and a second acutely disposed adjoining surface, said first and second surfaces of said first bar are joined by a third intermediate surface disposed substantially normal to said first surface and obtusely relative to said second surface thereby forming a generally sharp abrupt corner edge, the second transverse bar being spaced from said first bar and including a substantially flat first surface lying substantially on said upper face and a second adjoining surface forming a corner edge having an included angle not exceeding 90°, said edges facing in opposed relation and lying on opposite sides of a plane perpendicular to said faces and parallel to said bars, said edges being spaced from each other along a line perpendicular to said last mentioned plane a distance not greater than the predetermined thickness of said web, whereby said web-like material as it extends between said corner edges of said first and second bars is inclined in the direction of said second acutely disposed surface of said first bar to thereby insure high unit pressure at the engagement of said sharp corner of said first bar against said web-like material.