Air filter unit for use in respirators

Description

FIG. 1 is a top front perspective view of a preferred embodiment of the air filter unit for use in respirators;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof, the right side being a mirror image of that shown; and,

FIG. 4 is a bottom plan view.

The pattern of holes has been partially shown in FIGS. 1 and 3 for ease of illustration, it being understood that the broken lines indicate that said pattern of holes is continuous throughout the areas represented.