Filtering face-piece respirator having support structure injection molded to filtering structure
Assignee3M Innovative Properties Company
InventorsYonas Gebrewold, Michael K. Domroese, Dean R. Duffy, Dwayne D. Daugaard, Nhat Ha T. Nguyen, David M. Blomberg
Life of this patent
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Abstract
A filtering face-piece respirator 10 that comprises a mask body 12 and a harness 14. The mask body 12 includes a supporting frame structure 16 and a filtering structure 18. The frame structure is injection molded onto the filtering structure 18 such that the frame structure 16 becomes bonded to the filtering structure 18. A mask body having such a support structure allows the filtering structure to follow its configuration closely, providing improved aesthetics and collapse resistance to the resulting article.
Claims12
A filtering face-piece respirator that comprises:
- a) a harness;
- and
- b) a mask body that comprises:
- (i) a filtering structure;
- and
- (ii) a supporting frame structure that has been injection molded onto the filtering structure such that the filtering structure becomes bonded thereto.
A filtering face-piece respirator that comprises:
- a) a harness that includes one or more straps;
- and
- b) a mask body that has the harness joined thereto and that comprises:
- (i) a filtering structure that contains one or more layers of electrically-charged nonwoven fibrous material and one or more cover webs which each contain polymeric fibers;
- and
- (ii) a plastic supporting frame structure that includes at least one member that extends across the mask body and that has been injection molded onto the filtering structure such that the at least one member becomes bonded to the filtering structure by having the plastic of the support structure member interpenetrate into at least the cover web and at least the one filtering layer.
Dependencies are inferred from the claim text.