Liquid droplets are formed by instantaneous state change by thermal energy of a liquid filled in a thermal chamber, said droplets being deposited onto a recording member to achieve recording.

Bubble jet recording method and apparatus in which a heating element generates bubbles in multiple liquid flow paths to project droplets

An ink jet recording method which comprises contacting or bringing closer an electro-thermal transducer with or to a recording liquid in an operating chamber having a discharge orifice, introducing into the electrothermal transducer an input pulse signal with its pulse width being in a range of from 01 μsec to 500 μsec, said input pulse signal being introduced in such a manner that its input cycle becomes at least three times as large as said pulse width, discharging and sputtering said recording liquid from said discharge orifice in the form of fine droplet in accordance with operating force developed within said operating chamber, and effecting image recording on the surface of a recording medium with the liquid droplets

Ink jet recording method

A liquid jet recording device comprises: a recording head having liquid discharging orifice for discharging liquid in a predetermined direction, a heat generating member, a heat acting zone where heat energy generated from the heat generating member acts on the liquid, and liquid feeding path for feeding the liquid to the heat acting zone; and drive signal feeding means for generating drive signals to drive said heat generating member to discharge the liquid in the predetermined direction, wherein the direction of the liquid flowing into said heat acting zone from said liquid feeding path differs from the direction of the liquid flowing out of said heat acting zone toward said liquid discharging orifice.

Liquid jet recording device

There is disclosed an illumination device in which a light guide is adapted to emit the light from a face thereof and is provided with an area, on a face opposite to the light emitting face, for diffusing and/or reflecting the light introduced into the light guide from an end face thereof or is provided with uneven light emitting characteristics along the longitudinal direction of the light guide, and the center of the light source positioned at the end of the light guide is placed at a position aberrated from the normal line to the area, whereby attained are compactness, a low cost, a low electric power consumption, a high efficiency of utilization of the light emitted by the light source, and excellent and uniform illumination characteristics. There are also disclosed an image reading device and an information processing apparatus, equipped with the above-mentioned illumination device.

Light guide, illuminating device having the light guide, and image reading device and information processing apparatus having the illuminating device

A method for controlling a terminal flow of ink droplets from the nozzle of an ink jet printer at the end of a printing operation is provided The printer has a first heating element disposed on one side of the nozzle that is selectively actuated to direct ink droplets away from a recording medium and into an ink gutter during a printing operation The printer also has a second heating element disposed on the side of the nozzle opposite from the first heating element After the first heating element applies its last operational heat pulse to the printing nozzle at the end of a printing operation, the second heating element applies at least one deflection correcting heat pulse of the same duration, magnitude and period as the last operational heat pumps The method prevents ink droplets generated after the end of a printing operation from erroneously striking the printing medium

Continuous ink jet printer with asymmetric heating drop deflection

Dispositif de connexion pour transfert de chaleur par conduction. Ce dispositif est constitue par des faisceaux de feuilles metalliques 20, souples et thermiquement conductrices, chaque faisceau reliant une source de chaleur 10, tel qu'un composant electronique, a un puits de chaleur 16, 38, et exercant une force predeterminee sur la source de chaleur. Les feuilles metalliques sont suffisamment souples pour absorber toute dilatation ou contraction dues aux variations de temperatures. Ce dispositif est utilise dans les dispositifs de refroidissement de circuits integres.

Connexion thermique souple permettant d'ameliorer le refroidissement par conduction

A method and apparatus for writing timing-based magnetic servo band patterns on magnetic storage media. The apparatus includes a magnetic head and a tri-state driver. The driver is adapted to control three magnetic head states including two writes states having positive and negative current outputs, respectively, for performing a write sequence and a rest state, having no current output for avoiding overwriting of the magnetic pattern between write sequences. The driver is further adapted to gradually change the magnetic head state from a rest state to a write state before beginning a write sequence and to gradually change the magnetic head state back to a rest state upon completing a write sequence. Thus, strong uniform signal pulses are produced upon playback of the magnetic pattern.

Tri-state servowriter driver with slow return to zero

The invention is a non-contact optical tape tension sensor for a tape drive. A light source directs an incident beam to the tape in a region of the tape path near where the tape bends. The amount of divergence of the reflected light is related to the curvature of the tape, and thus to the tape tension. The reflected light is passed through an aperture to a photodetector that detects the amount of the divergent beam passing through the aperture. The photodetector output is input to the tape drive controller that controls the currents to the supply and take-up motors to thereby maintain the tape tension within the desired range.

James Howard Eaton

Papers

Connexion thermique souple permettant d'ameliorer le refroidissement par conduction

Tri-state servowriter driver with slow return to zero

Tape drive with non-contact optical tape tension sensor

Verfahren und vorrichtung zur erzeugung einer folge von gleich grossen und gleich beabstandeten fluessigkeitstropfen

Triboelectrification of materials used in tape heads