Filter and mask
Assignee3M Innovative Properties Company
InventorsHyoungSun Park, Jung Han Kim, Kyungsik Dan
Life of this patent
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Abstract
A filter according to an embodiment include a filter main body provided with a sheet member, and a border portion of the filter main body includes a first region bent at least one time, and a second region formed in a flat shape and provided to be bendable and to provide softness to the filter main body.
Claims11
A filter comprising a filter main body having a first major surface and a second major surface opposite the first major surface, the filter main body comprising an inside portion and a border portion bordering the inside portion, wherein the inside portion comprises a sheet member bent with overlapping bends to form a first region associated with the first major surface, and a second region associated with the second major surface;
- wherein the first region comprises a plurality of first region pieces separated by overlapping bends in the sheet member, wherein the filter further comprises discrete convex portions associated with first region pieces protruding from the first major surface, and the second region comprises a plurality of second region pieces associated with the second major surface, and wherein the second major pieces are positioned between the bends that separate the first region pieces.
Dependencies are inferred from the claim text.