Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Miyakoshi Printing Machinery Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electrical Industrial Co., Ltd.

Natsushita Electric Industrial Co., Ltd.

Hiroyuki Matsuba

Tetsuya Matsuzaki

Hiroaki Nakashima

Yoshinobu Ishimoto

Kazunari Chikanawa

Hideo Izawa

Takao Namiki

Kensei Otsubo

Shinichi Kitamura

Hideo Torii

Tohru Nakagawa

Takeshi Kamada

Seishi Tomari

Takashi Yoshihara

Masaharu Tanaka

Shogo Horinouchi

Hideaki Horio

Shigeyuki Takao

Akihiro Yamashita

Tadashi Maki

Yousuke Toyofuku

Hiroyuki Ogata

Takahisa Kato

Yugi Terashima

An ink supply device for a printhead includes an ink cartridge and a damper device. The ink cartridge is connected to the printhead through a flexible tube. The printhead is mounted on a carriage that reciprocates, and discharges an ink drop to perform printing. The damper device is mounted on the carriage to relax pressure fluctuation of ink supplied from the ink cartridge to the printhead. The damper device has a case, an ink introduction passage, and a flexible plate. The case defines a pressure chamber communicated with the printhead. The ink introduction passage is communicated with the flexible tube, and is communicated with the pressure chamber. The flexible plate is provided so as to define a part of the pressure chamber, and has a waveform portion formed with a plurality of waveforms.

Ink supply device for printhead

An ink jet head unit including a head () in which a plurality of nozzle arrays () are formed. Each of the nozzle arrays has a number of nozzle holes, and ink can be ejected from the nozzle holes. The head () is mounted on the head base, and flat cables () are connected at one end to mounting parts (), which are interposed between a first pair of the nozzle arrays () and a second pair of the nozzle arrays (). The flat cables are flexibly formed by covering transmission wires with an insulation film. The flat cables are connected to the head to transmit ink ejection signals for driving the head.

Ink jet head unit and ink jet recording apparatus mounted with the same

An ink jet recorder that includes line heads () having a plurality of nozzle heads (), main tanks () placed outside of the line heads () to store ink; an ink supply passage () that connects the main tanks () to the associated nozzle heads (), and distribution tanks () placed in each line head (). The number of supply tube connections () provided in the distribution tank () is smaller than that of the nozzle heads () arranged in the line head ().

Ink jet recorder and ink filling method

Print head for an ink jet printer

An ink supplier for an ink jet recorder is provided. The ink supplier includes a recording head, a main ink reservoir, and a subsidiary ink reservoir connected to the main ink reservoir for replenishment with ink from the main ink reservoir. A position head of the ink liquid level in the subsidiary ink reservoir is maintained substantially constant relative to a printing head face of the recording head.

Ink supplier for ink jet recorder

Printed circuit board

Plural nozzle arrays of which each comprises plural nozzle holes () from which ink is ejected are arranged slantingly in a main scanning direction. A distance between a first arbitrary nozzle hole (-) and a second nozzle hole (-), in a nozzle array adjacent to the array to which this first nozzle hole (-) belongs, which is adjacent to the first nozzle hole (-), and a distance between the first nozzle hole (-) and a third nozzle hole (-), in the nozzle array to which the second nozzle hole (-) belongs, which is further adjacent to the first nozzle hole (-) are different from each other.

Nozzle head, line head using the same, and ink jet recording apparatus mounted with its line head

A plurality of long narrow rectangular plate like nozzle heads are inclined together in a direction relative to that in which they are disposed side by side in a line in the line head for permitting ink that also gets into gaps between adjacent nozzle heads to be wiped away.

Methods of and apparatuses for wiping a line head in an ink jet recorder

An inkjet recording apparatus includes an absorber configured to abut a nozzle surface of a line head to absorb ink adhered on the nozzle surface. A portion of the absorber which corresponds to an opening of a nozzle is removed. The absorber is configured to abut the nozzle surface except for a portion near the nozzle. Ink remaining on the nozzle surface is absorbed by the absorber. Thus, when the nozzle surface is wiped with a blade, accumulation of a large amount of remaining ink is prevented.

Inkjet recording apparatus

An inkjet recording apparatus ejects ink from recording heads to a recording paper, thereby attaching the ink to the medium for recording. The apparatus includes a carriage driving motor, a transfer motor, a scanner which reciprocates a carriage having the recording heads in a scanning direction, and a transfer machine. The transfer machine transfers the recording paper in a transfer direction perpendicular to the scanning direction. Both of the motors are located at approximately the same place in an ejecting direction of ink from the heads to the paper, and at the same height of a transfer path of the paper or on the carriage side with respect to the transfer path.

Line heads are arranged along the transfer direction of a recording medium. Each line head has a nozzle surface in which nozzles are provided over a width direction of the recording medium. Purge units each corresponding to one of the line heads are arranged along the transfer direction of the recording medium at positions which deviate from the recording medium in the width direction. Each purge unit cleans the nozzle surface of a corresponding one of the line heads.

An ink jet recording apparatus, which performs printing by ink ejection, includes a pressure chamber in which ink liquid is filled; a nozzle hole () which is formed so as to communicate with the pressure chamber; a piezoelectric element () which is formed on the pressure chamber, and deforms the pressure chamber by mechanical expansion and contraction, whereby pressure is generated in the pressure chamber and ink is ejected from the nozzle hole (); and a dew point control unit () which maintains a dew point in an atmosphere of the piezoelectric element () and the vicinity of the piezoelectric element at a lower value than a dew point in an environment where the ink jet recording apparatus is set. The dew point control unit () includes a compressor (), and an air drier () which dries compression gas from the compressor () and feeds it to the piezoelectric element.

Ink jet recording apparatus

Growing community of inventors

Fukuoka, Japan

Hiroyuki Matsuba