Stiffened filter mask
AssigneeLouis M. Gerson Co., Inc.
InventorsRonald L. Gerson, Robert A. Brunell, Michael Cupicha
Life of this patent
Estimating the term…
Abstract
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.
Claims38
1-49. (canceled)
A method of manufacturing a mask having a filter layer, the method comprising:
- folding the filter layer to form two sections, each section having two ends and one side;
- reshaping the two ends of each section to form two reshape lines, each of the two reshape lines having a non-linear portion;
- and
- connecting the two sections along the two reshape lines such that the two sections form a pocket having a rim, wherein when the pocket is open at least two side panels extend from the rim to a front panel.
The method according 50, wherein the front panel is substantially flat.
A method of manufacturing a mask having a filter layer, the method comprising:
- forming a fused portion in the filter layer, the fused portion being seamless;
- connecting two planar surfaces of the filter layer to form a pocket having a rim, the fused portion spaced from the rim;
- and
- pulling on the rim to open the pocket, the filter layer forming at least three side panels that extend from the rim to define a perimeter of a front panel.
86-110. (canceled)
Dependencies are inferred from the claim text.