Hitachi, Ltd.

Tanaka Matthey Co., Ltd.

Hitachi Koki Co., Ltd.

Michihiro Watanabe

Kazutaka Sato

Tatsuya Nagata

Takehiko Yamada

Munetoshi Zen

Eiichi Hara

Taisaku Seino

Kazuhiko Ato

Akira Shimizu

Yasuo Otsuka

Shigeru Obata

Shogo Matsumoto

Hideyuki Kawase

Kazutoshi Konno

Youichi Narui

Hiromitsu Fukuda

Yoshinobu Watanabe

Masahisa Aoyagi

Katsuo Ohki

Sadayoshi Taguchi

Tsuguo Suzuki

Kimio Oga

Kazue Takahashi

Hidekazu Kohira

Isao Nakajima

Shunichi Oohara

Kenji Okuna

Kentaro Hamma

Sumihisa Kotani

Shigetoshi Hiratsuka

Koji Tagusari

Toru Hayama

Katsuhiko Kamachi

Kazuhiko Atoh

Maya Arai

Kazuhiko Atou

Hiroyuki Tobita

Kazuytaka Sato

A facsimile apparatus has a lower structure and an upper structure which is swingable between a raised open position an a lowered close position about a pivot located at a lower part of the rear end portion of the apparatus. A thermal print head is fixed to the front end portion of the upper structure. A recording medium conveyor roller is fixed to the front end portion of the lower structure. A linear image sensor and an original sheet conveyor roller are fixed to a central portion of the lower structure. The recording medium is placed on the lower structure at a position between the thermal print head and the linear image sensor.

Facsimile apparatus

An object of the present invention is to provide a facsimile apparatus having a high resolution image display unit and a hard copying unit, which is capable of preventing wasteful consumption of recording paper sheets while revealing a reduced size and excellent operation facility. In order to achieve the aforesaid object, according to the present invention, there is provided a facsimile apparatus having the image display unit comprising a reflecting mirror for displaying a toner image formed on an image recording medium in response to an image signal while inverting the toner image into a readable direction and a cover, a selection unit for determining whether or not it is necessary to transfer and fix the toner image onto the recording paper sheet in accordance with whether or not it is necessary to record image information discriminated from the toner image displayed on said image display unit, and the hard copying unit for transferring fixing the toner image formed on the image recording medium by a transferring roller and a drive roller in response to a selection signal supplied from the selection unit.

Facsimile apparatus and image signal display method and image signal

A facsimile apparatus has a lower structure and an upper structure which is swingable between a raised open position an a lowered closed position about a pivot located at a lower part of the rear end portion of the apparatus. A thermal print head is fixed to the front end portion of the upper structure. A recording medium conveyor roller is fixed to the front end portion of the lower structure. A linear image sensor and an original sheet conveyor roller are fixed to a central portion of the lower structure. The recording medium is placed on the lower structure at a position between the thermal print head and the linear image sensor.

A thick film thermal printing head having a substrate, an insulating glaze layer formed on the substrate, a heating resistor formed into a straight elongated shape, a driver IC for controlling energization of the heating resistor, a plurality of first lead wires for connection between the heating resistor and the driver IC, a common electrode serving as an intermediate power supply point through which electric power is supplied to the heating resistor, and a plurality of second lead wires for connection between the heating resistor and the common electrode, the first and second lead wires are alternately disposed parallel to each other, at least the first lead wires, the second lead wires and the common electrode being formed on the glaze layer. The heating resistor is formed in the vicinity of an end surface of the substrate, and the lead wires, the common electrode and the driver IC and other components are suitably arranged to form a thick film thermal printing head structure having no insulating interlayer and no through holes at the connection between the lead wires and the common electrode, enabling simplification of the manufacture process and a reduction in the manufacture cost. It is also possible to improve the printing performance of a thermal transfer facsimile apparatus or thermal transfer printer as well as to reduce the size thereof by using the thick film thermal printing head of the present invention.

Thick film thermal printing head

A contact type image sensor comprises a transparent substrate, photoelectric conversion elements disposed on the substrate, and an opaque film disposed selectively over the first photoelectric conversion elements. The first photoelectric conversion element over which the opaque film is disposed indicates a reference quantity of received light. The second photoelectric conversion element connected with the first photoelectric conversion element in adjacent relationship and having no opaque film disposed thereover indicates a quantity of light from an original document. A signal free from a varying luminance of the light source is obtained from the junction point of the first and second photoelectric conversion elements.

Contact type image sensor having photoelectric conversion elements to

A thick film type thermal head produced by consecutively forming, on an insulator substrate, a heat-resistant layer, an electrode, a heating resistor and a protective layer, wherein the protective layer comprises an electrically insulating protective layer covering the heating resistor and that portion of the electrically insulating protective layer which corresponds to a medium comprises a heat-diffusing coating having a high thermal conductivity over the electrically insulating protective layer.

Thick film type thermal head and thermal recording device

A digital signal is provided by correcting image signal distortions contained in an image signal outputted from an elongated direct contact type image sensor in an image reader such as a facsimile device, which image sensor reads patterns on a document in contact with the document. The image signal distortions of the sensor output are so-called shading distortions due to sensitivity distribution of sensor elements or distribution of light from light sources onto the document. Signal distortions are corrected from both a white signal outputted from the sensor when a white document is read and a black signal outputted when a black document is read. The white signal and the black signal are stored and reproduced to generate a reference signal which is obtained by dividing the voltage range across both the signals at a predetermined ratio. The digital signal is obtained by comparing the sensor output with the reference signal. If necessary, a pseudo-black signal may be produced by dividing the voltage of the white signal.

Method and apparatus for correcting an image signal

A thermal head obtained by calcining a mixed material comprising at least ruthenium oxide particles having specific surface area of 10 to 45 m.sup.2 /g and a particle size of 1 .mu.m as the upper limit value of particle size distribution, glass fine particles and a dispersant which disperses these fine particles and disappears by calcining can reduce scattering of resistance values and give high image quality at thermal printing.

Thick film resistor material and thermal head obtained therefrom

A thermal head obtained by calcining a mixed material comprising at least ruthenium oxide particles having a specific surface area of 10 to 40 m.sup.2 /g and a particle size of 1 .mu.m as the upper limit value of particle size distribution, glass fine particles and a dispersant which disperses these fine particles and disappears by calcining can reduce scattering of resistance values and give high image quality at thermal printing.

A photoelectric transfer element of which a reading sensor for reading written materials such as facsimile documents has a controlled photosensitive region within the photoelectric transfer element. Thus photosensitivity in a region of the photoelectric transfer element is reduced to improve element performance. The specific photosensitivity control methods include an electric field control, increased impurity concentration, and irradiation ultraviolet light.

Line image sensor with controlled photosensitivity

In a contact-type image sensor for use in a facsimile equipment or the like, the surface of the sensor is provided with a transparent film which is electroconductive and of which the surface that is in contact with the sensor elements is formed as a roughened surface capable of scattering light. By virtue of the provision of this film, static electricity generated during the running of the original is prevented from causing fluctuations in the sensor output voltage. In addition, light reflected by the surface of the transparent film is prevented from becoming directly incident on the sensor elements and, hence, from causing abnormal increases in the sensor output.

Facsimile equipment with direct-contact-type image sensor

Direct-contact-type image sensor and image sensor assembly

A thick film type thermal printing head is characterized by having as a protective film a surface layer of at least one amorphous glass layer and an underlying layer of at least one crystallized glass layer or inorganic material-filled amorphous glass layer to increase reliability and life of the printing head.

Thick film type thermal head

The first and second electrodes, to which a recording signal is to be applied, are printed to a desired pattern on an insulating substrate by, for example, a screen printing method. A heating resistor is formed by, for example, a screen printing method so as to be bridged over these first and second electrodes. A protective layer is formed so as to cover the first and second electrodes and heating resistor therewith. Each of the heating portions of the heating resistor is provided with one or a plurality of laser-made holes, and the resistance value of each heating portion of the heating resistor is regulated to a predetermined level on the basis of the number of the laser-made holes.

Heat-sensitive recording head and method of manufacturing same

A printing hammer driving apparatus for high-speed printers comprises a lever member acting as a hammer operating part, an armature forming a part of a magnetic circuit, and an electromagnet forming, together with the armature, the magnetic circuit. The lever member has a rotational supporting point at the base end thereof and is made of a light-weight non-magnetic material. The armature is projected in one of the rotational directions of the lever member from the intermediate part of the lever member. The electromagnet has at least one core and an exciting coil wound on the core. A core has a magnetic pole face perpendicular to the direction of attraction of the armature and a magnetic pole face parallel to the direction of attraction of the armature. The magnetic pole face perpendicular to the direction of armature attraction is opposed with a gap to the forward end face of the armature, and the magnetic pole face parallel to the direction of armature attraction is opposed with a gap to the surface of the armatures parallel to the direction of attraction thereof.

Growing community of inventors

Tsuchiura, Japan

Michihiro Watanabe