Sharp Kabushiki Kaisha Corporation

Minoru Sakama

Masahiko Aiba

Fusao Iwagami

An ink jet printer nozzle clog preventive apparatus includes a cap member provided opposite a printing head on a carriage positioned outside the printing zone, the cap member being movable toward and away from the printing head, a moving mechanism including a driving source for moving the cap member toward the printing head, a pump connected to the cap member interior to achieve a negative pressure in the cap member when the printing head is covered with the cap member, a maintenance solution tank from which to supply maintenance solution to the cap member interior, a control system for controlling the moving mechanism, pump and maintenance solution tank according to the printer state, and an instruction switch for instructing a nozzle recovery operation when air enters the printing head nozzle.

Ink jet printer nozzle clog preventive apparatus

A frequency control device for use in a laser printer which comprises a modulator for modulating an original signal by a modulation signal so that the speed of the printing data of the laser printer is changed to compensate the change of the scanning speed of a light spot projected by a polygon mirror in the laser printer without using a f-.theta. lens.

Growing community of inventors

Nara, Japan

Minoru Sakama