Abstract: A headgear suitable for wearing a respiratory mask system wearing on the head of a user is provided, wherein it can be easily manufactured, the leakage of the positive pressure gas when pressurized is reduced, and a good wearing feel is achieved. The headgear is adapted to secure a respiratory mask, which contacts the face of the user to supply a positive pressure gas for respiration to the user, to the head of user. The headgear has a head mounted portion which is worn on the occipital of the user and a strap (3) connecting to this head mounted portion. The head mounted portion has at least one closed curved belt (1) which has thereon at least one junction (2). At least one junction provides the closed curved belt with a nonplanar structure adaptable to the shape of the head of the user.

Abstract: A headgear suitable for wearing a respiratory mask system wearing on the head of a user is provided, wherein it can be easily manufactured, the leakage of the positive pressure gas when pressurized is reduced, and a good wearing feel is achieved. The headgear is adapted to secure a respiratory mask, which contacts the face of the user to supply a positive pressure gas for respiration to the user, to the head of user. The headgear has a head mounted portion which is worn on the occipital of the user and a strap (3) connecting to this head mounted portion. The head mounted portion has at least one closed curved belt (1) which has thereon at least one junction (2). At least one junction provides the closed curved belt with a nonplanar structure adaptable to the shape of the head of the user.

Abstract: According to the present invention, there is provided a nasal respiratory mask contacting with the face of a user for supplying respiratory positive-pressure gas to the nose of the user, comprising at least a part attached tightly to the face that is attached tightly to the face of the user; a frame-fitting part for fitting to a frame; and an elastic connecting part that connects elastically the part attached tightly to the face with the frame-fitting part, wherein a facial side of the elastic connecting part is kept apart from the frame-fitting part side thereof for a required distance even in the absence of applied respiratory positive pressure. The nasal respiratory mask has advantages that it can be worn in an appropriate position without applying positive pressure at the start of wearing, scarcely disturbs the visual field during wearing, and can prevent prolongation of the time required for drying or occurrence of unsanitary condition after routine cleaning by washing with water.

Abstract: The invention provides an apparatus for supplying a respiratory gas to a respiratory air way of a patient. The respiratory gas supplying apparatus 10 includes a cylinder 12 filled with a respiratory gas, a cart 14 having an accommodating portion for disposing the cylinder 12, a shut-off valve 18 attached to the cylinder 12, a flow regulating valve 40 attached to the shut-off valve 18, a conduit 22, attached to the flow regulating valve 40, for directing the respiratory gas to the inlet of the respiratory airway of the patient, a coupler 16, integrally connected to the flow regulator 40, for coupling the flow regulating valve 40 to the shut-off is valve 18, and a linkage 110 for disengaging the coupler 16 from the shut-off valve IS when the cylinder 12 is detached from the cart 14.

Abstract: A method for crystallizing a low molecular weight aromatic polycarbonate effectively and a method for preparing a polycarbonate resin having a desired intrinsic viscosity by using the polycarbonate crystallized with the above method of crystallization. A low molecular weight aromatic polycarbonate (preferably, the one produced by melt polycondensation) is crystallized by bringing it into contact with an aromatic monohydroxy compound or a mixture of said compound and water. Or, a low molecular weight aromatic polycarbonate is melt mixed with at least one or more kinds of compounds selected from the group consisting of aromatic monohydroxy compounds, carbonic acid diester compounds and aromatic dihydroxy compounds to crystallize the low molecular weight aromatic polycarbonate. The crystallized product is heated at a temperature lower than its melting point under reduced pressure or in an inert gas flow to convert it into a high polymerized state.

Abstract: The invention provides an apparatus for supplying a respiratory gas to a respiratory air way of a patient. The respiratory gas supplying apparatus 10 includes a cylinder 12 filled with a respiratory gas, a cart 14 having an accommodating portion for disposing the cylinder 12, a shut-off valve 18 attached to the cylinder 12, a flow regulating valve 40 attached to the shut-off valve 18, a conduit 22, attached to the flow regulating valve 40, for directing the respiratory gas to the inlet of the respiratory airway of the patient, a coupler 16, integrally connected to the flow regulator 40, for coupling the flow regulating valve 40 to the shut-off valve 18, and a linkage 110 for disengaging the coupler 16 from the shut-off valve 18 when the cylinder 12 is detached from the cart 14.