METHOD FOR FORMING FILTERING SEMIMASK OF RESPIRATOR Russian patent published in 1997 - IPC

FIELD: individual devices for protection of respiratory organs. SUBSTANCE: method involves bending aside blank edges to form baffle flange and folding blank in half along transverse axis of symmetry; forming creases in folded blank, with height of first crease corresponding to width of baffle flange; bending aside and securing blank ends by, for instance, clips; moving creases to smooth blank by stretching blank middle portion; expanding semimask. When folded in end-to-end way, semimask has flat fan-like configuration. EFFECT: simplified method, convenient transportation and storage. 6 dwg, 1 tbl