Reusable single-filter half-mask respirator

Abstract

1. Name of the product in this design: Reusable single-filter half-mask respirator. 2. Purpose of this design: This single-filter half-mask respirator is used in conjunction with particulate filter cotton or gas / vapor filter cartridges to enable the user to breathe safely. The respirators shown in Designs 1 and 3 are designed to check for airtightness. 3. The key design points of this product are: the shapes of Design 1 and Design 2, and the combination of shapes and colors of Design 3 and Design 4. 4. The picture or photo that best illustrates the key design points: Design 1 3D diagram 1. 5. Design 1 is designated as the basic design. 6. Other situations requiring explanation: Designs 3 and 4, for which protection is sought, contain color.

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