Ventilation stile filters

Abstract

This product is made of nonwoven fabric partially coated with a transparent adhesive, and is attached to the top, bottom, or side of a window sash to allow ventilation with the window closed, preventing the ventilation sash from becoming dirty with dust from outdoors without impairing its ventilation. One example of how to attach it to a ventilation sash is to first cut it to an appropriate size to fit the shape of the ventilation sash as shown in the "reference back view showing the cut state," and then attach the adhesive-coated side to the ventilation sash as shown in the "reference view showing the state in use." As a result, while dirt adheres to the breathable nonwoven fabric part, dirt does not easily adhere to the nonwoven fabric part coated with the adhesive, so that the coating appears white as shown in the "reference back view showing the state after use," indicating when it is time to replace it.

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