Fujitsu Corporation

Tomoaki Fukuda

Naoyuki Fujimoto

Shigehiro Fujii

Tatsuhiro Taniwa

Tadayoshi Nakata

Rika Nishiwaki

Tatsuya Itakura

Mitsuhiro Hirohata

Yoshizi Atsumi

An image forming apparatus which includes a paper delivery unit which is provided as to be rockable and displaceable between an operating position close to a photosensitive drum and a standby position remote from the photosensitive drum; a supporting link system, operably coupled to the paper delivery unit, for holding the paper delivery unit at the operating position; and energizing device, operably coupled to the supporting link system, for energizing the paper delivery unit so as to move from the standby position to the operating position. The paper delivery unit includes a transferring device for transferring a toner image from the photosensitive drum onto a sheet, a tractor for feeding the sheet, disposed in the upstream of the transferring device in a paper delivery direction, and a suction feeder for holding and delivering the sheet, disposed in the downstream of the transferring device in the paper delivery direction. A delivery unit frame for supporting the transferring device, the tractor and the suction feeder is pivotally supported by a body frame disposed in the upstream in the paper delivery direction. In other words, the paper delivery unit is held at its operating position by way of the supporting link system, and is moved back to the position from its retracted position by way of the energizing device. The paper delivery unit is thus capable of moving to and from an operating position for, e.g., ease of cleaning the transferring device or removing jammed papers.

Paper delivery and stacker unit in an image forming apparatus

A flash lamp fixing with a simple structure, capable of obtaining an even distribution of high-level luminous energy over a large area on the surface of a paper sheet illuminated by a flash lamp. In the flash lamp fixing device, the half breadth L.sub.1 of the aperture of the reflector is set so as to satisfy the equation V/T.gtoreq.L.sub.1 .gtoreq.V/T-L.sub.2 /2, where V is the conveying speed of a paper sheet; T is the flash cycle of the flash lamp; L.sub.1 is the half breadth of the aperture of the reflector; and L.sub.2 is the length of an area in which fixing can be done by one flash of the flash lamp. Where .theta..sub.1 represents the included angle between a tangent which passes through one of aperture edges, being tangent to the flash lamp on the side of the aperture and the plane of the aperture; and .theta..sub.2 represents the included angle between a tangent which passes through the aperture edge, being tangent to a safety distance critical circle centered on the center of the flash lamp and a plane normal to the aperture plane, the tilt angles of the respective inclined face parts in relation to the plane normal to the aperture plane are set to be not less than .theta..sub.1 and not more than .theta..sub.2.

Flash lamp fixing device

Growing community of inventors

Hyogo, Japan

Tomoaki Fukuda