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Respirator having preloaded nose clip

A technology of respirators and nose clips, applied in the field of respirators, to achieve good fit, less effort and maintenance, and prevent leakage

Inactive Publication Date: 2008-08-20
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While metal nose clips provide a snug fit to the wearer's nose, they must be individually adjusted to fit the shape of each wearer's nose

Method used

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  • Respirator having preloaded nose clip
  • Respirator having preloaded nose clip
  • Respirator having preloaded nose clip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] The nose clip of the present invention was formed as described in the "Nose Clip Manufacturing Procedure" section mentioned above. A preform having the configuration of Figure 7 was cut from polyethylene terephthalate (PET) film. Attach preform to 3M 8210 using pressure sensitive tape TM On the main body of the respirator (without the standard metal nose clip), the pressure sensitive tape was Scotch 300LSE High Strength, available from 3M Company, St. Paul, MN. Apply this pressure sensitive tape over the entire underside of the preform to secure it to the mask. After the preform is attached to the mask, it is molded into a predetermined shape when it is mounted on the mask body. The pre-form was formed into a nose clip using the forming tool shown in FIG. 9 . The preform was molded at a temperature of about 88°C with a clamping force of about 10 Newtons applied for about 5 to 6 seconds. Cool the nose clip to about 60°C for 5 to 6 minutes while forming on the tool. ...

Embodiment 2

[0082] The nose clip of the present invention was formed as described in the "Nose Clip Manufacturing Procedure" section mentioned above. A preform having the shape of Figure 7 was cut from the PET film. Join the preform to the 3M 8511 using ultrasonic welding TM on the main body of the respirator. As shown in FIG. 7, the preform is welded to the mask at points extending inwardly from the ends 34 and 36 along the beta dimension. After the pre-form is attached to the mask, the pre-form is molded into a predetermined shape using a molding tool 74 as shown in FIG. 9 . Molding was performed at a temperature of about 88°C with a clamping force of about 10 Newtons applied for 5 to 6 seconds. While the nose clip is in the tool, cool it to about 60°C for 5 to 6 minutes. The TILs of the three masks made in this manner were evaluated. The resulting TILs for the three masks worn on three individuals were 1.6%, 0.2%, and 6.6%, respectively.

Embodiment 3

[0084] The nose clip of the present invention was formed as described in the "Nose Clip Manufacturing Procedure" section mentioned above. Preforms having the configuration shown in Figure 10 were cut from PET film. Join the preform to the 3M 8511 using ultrasonic welding TM On the main body of the respirator (no standard metal nose clip). As shown in Figure 8, the preform is welded to the mask at points extending inwardly from the ends 34 and 36 along the Σ dimension. After the preform is attached to the mask, the preform is molded in the on the mask. While the nose clip is in the tool, cool the nose clip to about 60°C for 5 to 6 minutes. The mask of this example had good face fitting properties.

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PUM

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Abstract

The invention discloses a respirator including a mask body and a nose clip. The mask body is adapted to fit over a person's nose and mouth, and the nose clip is positioned on the mask body such that the nose clip extends over the bridge of the wearer's nose when the mask is worn. The nose clip has a predetermined shape including first and second wings. When the mask is worn, these wings elastically exert forces on each side of the inner wearer's nose. The present invention eliminates the need for the wearer to individually adjust the shape of the nose clip to fit the wearer's nose.

Description

[0001] The present invention relates to a respiratory mask having a nose clip positioned on the mask body such that when the mask is worn, the nose clip exerts a compressive force on opposite sides of the wearer's nose. This force is created by the predetermined shape provided to the nose clip. Background technique [0002] Respirators (sometimes referred to as "filtering facepieces" or "filtering masks") are worn over a person's breathing passages for two common purposes: (1) to prevent impurities or pollutants from entering the wearer's airways; (2) ) prevents exposure of other persons or things to pathogens and other contaminants exhaled by the wearer. In the first case, the respirator is worn in an environment where the air contains particles that are harmful to the wearer, such as in an auto body shop. In the second case, respirators are worn in environments where there is a risk of contamination of other persons or things, such as in operating rooms or clean rooms. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62B23/02
CPCA41D13/1146A62B23/025A62B23/02
Inventor 托马斯·J·薛约纳斯·加布雷沃尔德
Owner 3M INNOVATIVE PROPERTIES CO
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