<p>A flat-folding mask includes a filter layer forming a rim. The filter layer has first and second side panels extending from the rim. A substantially centrally located front panel bridges the first and second side panels, the front panel being substantially flat. The filter layer further includes a fused portion that is seamless and spaced from the rim. Triangular pleats may add support to the side walls and increase the effective filtration area of the mask.</p>
申请公布号
EP1773144(B1)
申请公布日期
2010.12.01
申请号
EP20050771371
申请日期
2005.06.09
申请人
LOUIS M. GERSON CO., INC.
发明人
GERSON, RONALD, L.;BRUNELL, ROBERT, A.;CUPICHA, MICHAEL