BILLFOLD-BAG Russian patent published in 1996 - IPC

FIELD: light industry, in particular devices for storing flat articles. SUBSTANCE: billfold-bag has rectangular panels connected for folding one with respect to the other and provided with pockets carrying rigidity members made from layers of fabric, woven from polyparaamide filaments with linear density of 29-110 tex, which are stitched by high-strength synthetic threads, and paper layers. Volumetric fabric-paper ratio is within the range of 110.4-110.6, total surface density is within the range of 40-100 g per sq. dm. EFFECT: increased efficiency, wider usage range and increased service life. 1 tbl, 5 dwg