Ricoh Company, Ltd.

Yuta Yabuta

Tatsuya Kubo

Kazuki Yogosawa

Yoshihiro Fujiwara

Takuya Suganuma

Hotaru Hashikawa

Takuya Sekine

Tatsumi Yamada

Shohtaroh Hoshi

A filter holding device includes an opening portion and a filter. The opening portion communicates between an inside and an outside of the filter holding device. The filter is disposed in the opening portion and includes a first side and a second side. The first side is located adjacent to the inside of the filter holding device. The second side is located adjacent to the outside of the filter holding device. The filter has a larger weight density per unit volume at the second side than a weight density per unit volume at the first side and has a larger area of a surface intersecting a communication direction at the second side than an area of a surface intersecting the communication direction at the first side.

Filter holding device, developing device, process cartridge, and image forming apparatus

A filter holding device includes an opening portion and a filter. The opening portion communicates an inside of the filter holding device with an outside of the filter holding device. The filter includes a first side and a second side. The first side faces the inside of the filter holding device. The second side faces the outside of the filter holding device. The filter has a lower weight density per unit volume at the first side than at the second side. At least a side face of the first side of the filter is covered with an air-impermeable member. The side face is a lateral face of the filter at the first side.

Filter holding device, developing device, process cartridge, image forming apparatus, and filter

Growing community of inventors

Kanagawa, Japan

Yuta Yabuta