Sharp Kabushiki Kaisha Corporation

Nippon Light Metal Company, Ltd.

Takeshi Yoshida

Mitsuru Ogura

Shoichiro Yoshiura

Kazuhiko Yamazaki

Keizo Fukunaga

Masayuki Furumaki

A corrugated-fin heat exchanger is constructed by arranging a plurality of flat heat exchange tubes parallel to each other in a horizontal direction between a pair of opposing header pipes, joining, at a position between the plurality of flat heat exchange tubes, corrugated fins formed by alternately repeating peak folding and valley folding portions, and forming water flow passages from lug pieces that are obtained by obliquely cutting and raising flange portions extending along end portions of each of the plurality of flat heat exchange tubes () in a width direction thereof. A pitch (P) of each of the corrugated fins between a peak and a valley thereof, a width (L) of each of the lug pieces in a vertical direction thereof, and a thickness (T) of the each of the plurality of flat heat exchange tubes have a relationship of P&#xd7;2&#x2267;L&#x2267;T.

Drainage structure for corrugated-fin heat exchanger

A drain structure for a corrugated fin-type heat exchanger, the corrugated fin-type heat exchanger being constituted by arranging a plurality of flat heat exchange tubes parallel to one another in a horizontal direction between a pair of opposing header pipes, and joining corrugated fins between the plurality of flat heat exchange tubes, the drain structure including a plurality of water flow passages for inducing water retained between the corrugated fins adjacent to an upper side and a lower side of each of the plurality of flat heat exchange tubes, the plurality of water flow passages being formed on an outer end surface of the each of the plurality of flat heat exchange tubes in a width direction thereof at a pitch along a longitudinal direction of the each of the plurality of flat heat exchange tubes.

Drainage structure of corrugated fin-type heat exchanger

A copying machine with a charger including a charging wire for charging the surface of a photosensitive drum and a convergent optical system for forming a focused image of an original on the surface of the drum. The copying machine further includes a waste toner unit, a cleaning unit for cleaning the charging wire and optical system which consists of a first cleaning member for grasping therebetween the charging wire stretched in the charger during cleaning, and a second cleaning member kept in contact with the surface of the convergent optical system, wherein the cleaning members are supported as to be movable in a longitudinal direction of the charging wire and the convergent optical system when cleaning the charging wire and the optical system.

Image forming unit with a charger wire and optics cleaning mechanism

An image forming cartridge houses a charger unit integrally with respect to a photoreceptor. Charge wire positioning members are provided on the image forming cartridge body at positions corresponding to holes provided in the charger unit aligned with the charge wire in the charger unit. The charge wire positioning members are spaced at a specified distance from the photoreceptor to ensure uniform charging of the photoreceptor by the charge wire.

Image forming cartridge for providing uniform corona charging

A photoreceptor cartridge unit having a cartridge frame made of plastic on which a photoreceptor drum acting as a rotary member and its peripheral components are integrally mounted. The cartridge frame is formed with a plurality of bearing portions for supporting the rotary members and a plurality of positioning projections and is split, at the bearing portions, into two frame portions provided with an engageable portion and a receiver portion, respectively. The peripheral components are formed with a plurality of positioning holes so as to be mounted on the cartridge frame through engagement of the positioning projections with the positioning holes. The two frame portions are coupled with each other through engagement of the engageable portion with the receiver portion.

Photoreceptor cartridge unit

A paper feeding cassette setting arrangement which is so arranged that the action point of a pushing arm is pulled by a spring so as to push up a paper tray only when the paper feeding cassette is set in the copying apparatus. The operator has only to push in the paper feeding cassette when the cassette is desired to be set in the copying apparatus, and also the operator has only to pull out the paper feeding cassette when the cassette is desired to be taken out of the copying apparatus since the cassette has been already pulled out to some extent, with the lock thereof being released. A pushing arm may rotate orthogonal to the paper feeding direction.

Growing community of inventors

Shizuoka, Japan

Takeshi Yoshida