VENTILATION FILTER FOR TONER CONTAINER, VENTILATION MEMBER, TONER CONTAINER USING THEM AND VENTILATION FILTER ASSEMBLY FOR THE TONER CONTAINER

摘要

PROBLEM TO BE SOLVED: To provide a ventilation filter for a toner container whose service life is prolonged, and to provide a toner container which uses the same.;SOLUTION: The ventilation filter for the toner container 1 includes a PTFE porous film 2 and a permeable support layer 3, and the scavenging efficiency of the support layer 3 measured by using air dust whose particle size is 1 to 5 m is set to 60%. In the toner container, the filter 1 is attached to the ventilation part of the container having space for storing toner. For example, nonwoven fabric is used for the support layer 3. It is desirable that the nonwoven fabric is electret-treated.;COPYRIGHT: (C)2005,JPO&NCIPI