Interfaces for positive pressure therapy having a mask assembly, a headgear assembly and a connection port assembly are disclosed herein. The connection port assembly has a ball joint connection with the mask assembly and includes a quick release button for easily disconnecting the gases source conduit from the mask assembly. The mask assembly may include a bias flow vent that is formed separately and attached to the mask assembly. The headgear assembly encircles the rear region of the user's head and may include at least some portions that are substantially non-stretchable.

Provided is a method of producing a layered article by which a sufficient production speed can be achieved, and preferably, a variation in fusion strength can be suppressed and hence a variation in product quality can be reduced. The method of producing a layered article of the present invention includes fusing at least part of a single-layer body or a laminate including at least one layer including a non-woven fabric of fiber having a fiber diameter of 100 m or less through ultrasonic welding.

The stretchable porous film of the present invention includes voids in a surface thereof, in which: the stretchable porous film has an air permeability measured with an Oken-type air permeability meter of less than 99,999 sec/100 cc; the stretchable porous film has such an extending direction that an air permeability measured with the Oken-type air permeability meter in a state in which the stretchable porous film is extended by 100% becomes less than 60,000 sec/100 cc; and the stretchable porous film has such a pulling direction that when, in a hysteresis test, the stretchable porous film is pulled from a width of 20 mm and an inter-chuck distance of 30 mm to an inter-chuck distance of 60 mm at a pulling speed of 50 mm/min and held for 1 minute, and then the pulling of the inter-chuck distance is released, a residual strain becomes 10 mm or less.

Interfaces for positive pressure therapy having a mask assembly, a headgear assembly and a connection port assembly are disclosed herein. The connection port assembly has a ball joint connection with the mask assembly and includes a quick release button for easily disconnecting the gases source conduit from the mask assembly. The mask assembly may include a bias flow vent that is formed separately and attached to the mask assembly. The headgear assembly encircles the rear region of the user's head and may include at least some portions that are substantially non-stretchable.

A rubber cord for attachment to the left and right of a mask body portion is provided. The rubber cord is formed by braiding a plurality of rubber strings.

A velcro inserting type universal synthetic resin mask with a replaceable filter, an injection molding apparatus therefor, and a manufacturing method thereof are described. The velcro inserting type universal synthetic resin mask with a replaceable filter can include a mask guide with a rim-like shape which supports a filter insertion portion therein and is formed of a synthetic resin by an injection molding process using an upper mold and a lower mold along with the filter insertion portion; and a velcro for attachment of a filter which is placed at a front portion of a velcro entity for attachment of a filter forming portion of the upper mold during the injection molding process for the mask guide and the filter insertion portion and formed on the mask guide when inserted such that the velcro for attachment of a filter is fixed through a velcro entity insertion hole of the upper mold.

The invention relates to the use of at least one impact modifier having a refractive index IR.sub.1 in a polyamide matrix consisting of a mixture of amorphous polyamide and semicrystalline polyamide, said matrix having a refractive index IR2, the difference in absolute value of IR.sub.1-IR.sub.2 not exceeding 0.006, to produce a transparent composition having a fatigue strength, under the fatigue test referred to as notched Ross-Flex, greater than 50 000 at 10 C.

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.

A signal processing evaluator and methods that compare a digital waveform of a cardiac signal to a first processed signal generated by a test system such as an EP recorder or an EP mapping system and generates a first finding evaluating how well the test system filters non-cardiac signals or simulated body impedance. A simulator and methods that send cardiac signals including non-cardiac signals or simulated body impedance to a test system and to a signal processing evaluator for evaluation of the test system.

Face masks, including filter masks, having improved stability, including face masks having a sealing member (25) depending from the mask body for engagement with the wearer's face, the mask body comprising a nasal portion (27) for accommodating the nose of the wearer, a mouth portion (26) for accommodating the mouth of the wearer, and cheek portions (28) extending laterally across the wearer's cheeks.