The disclosed methods of manufacturing filter masks include using an overmoulding step to both form a sealing member and to fix the sealing member to a support frame and a sheet of filtering material.

An air filter including a filter support that supports porous, polymeric sorbent particles that comprise a divalent metal impregnated therein.

A filtering face-piece respirator (10) having a cup-shaped, molded mask body (20) and having integral nose pads (21, 26) provided by inwardly-folded tabs (41, 46), which tabs (41, 46) are integral extensions of at least one layer of the mask body (20).

A protective face shield assembly is provided. The example protective face shield assembly includes a protective element, a frame, and a face seal. The frame defines a continuous inner frame edge and a continuous outer frame edge. The face seal includes a top portion, a bottom portion, and two side portions as a continuous unit, defining a continuous inner face seal edge and a continuous outer face seal edge. The continuous inner face seal edge is removably affixed against the continuous inner frame edge. The continuous outer face seal edge encapsulates an elastic band that fits against at least a front half portion of the head and face of a user. The face seal contains one or more layers of filter medium suitable for removing particulate matter from the air that flows from exterior air space and into interior air space.

A mask apparatus includes a mask body including an air duct disposed at a front surface of the mask body, and a fan module mounting portion disposed at a suction-side of the air duct, a fan module disposed at the fan module mounting portion and configured to supply external air to the air duct, a mask body cover that is coupled to the front surface of the mask body and covers the fan module and the air duct, a seal coupled to a rear surface of the mask body and configured to contact a user's face and define a breathing space for the user, a sealing bracket that fixes a portion of the seal to the rear surface of the mask body, and a pad configured to be disposed inside the breathing space.

Reinforced filter media are prepared by adhering discrete, non-intersecting strands of thermoplastic or thermoset materials to the filter media web. The filter media may be a fabric, a nonwoven web or a filtering foam. The reinforced filter media can be used to prepare respirators, including flat-fold respirators or molded respirators.

A four-layer filtering facepiece respirator with a combination of hydrophilic and hydrophobic polypropylene non-woven fabrics of varying weights and weave. The filtering facepiece respirator includes an innermost layer which is formed into the shape of a cup and includes a combination of hydrophilic and hydrophobic layers. The filtering facepiece respirator also includes a nose piece and a strap.

A patient mask including a body shaped to be placed over a face of a patient and configured to prevent the passage of viruses and/or particles therethrough and at least one port configured to receive an endoscope, a surgical instrument, or both and to conform to the shape of the surgical instrument such that the port prevents the passage of viruses and/or particles therethrough.

The present invention provides a mask structure, which comprises a first mask body, a main filtering layer, an air-isolator, and a second mask body. The main filtering layer is disposed at the first mask body. The area of the main filtering layer is smaller than the area of the first mask body. The air-isolator is disposed at the first mask body and adjacent to the periphery of the main filtering layer. The second mask body covers the main filtering layer and the air-isolator and is bonded with the air-isolator and the first mask body. Thereby, the bonding part of the mask structure can be tight and the filtering materials of the main filtering layer, such as sterilizing or adsorptive materials, will not leak from the bonding part. In addition, the air-isolator can guide the air inside and outside the mask structure to pass only through the main filtering layer for preventing the polluting particles, bacteria, or viruses inside and outside the mask structure from being propagated to the external environment or inhaled by the user.

Various embodiments of a filtering face-piece respirator and a method of forming such respirator are disclosed. In one or more embodiments, the filtering face-piece respirator can include a mask body. The mask body can include an inner cover web, an outer cover web, and filter media enclosed between the inner cover web and outer cover web such that the filter media does not extend to an edge of the mask body.