Matsushita Electric Industrial Co., Ltd.

Nitto-Denko Corporation

Panasonic Communications Co., Ltd.

Sansha Electric Manufacturing Company, Limited

Hajime Yamamoto

Hiroshi Terada

Yuji Takashima

Masahiko Nakamura

Masanori Yoshikawa

Satoru Furuyama

Noboru Katakabe

Yoshiharu Yamamoto

Masaaki Mori

Motonobu Yoshikawa

Akinobu Okuda

Daizaburo Matsuki

Yozo Nagai

Naoaki Ishimaru

Akinori Toyoda

Kenichi Nakano

Makoto Kuwamoto

Yoshihito Urata

Yukimasa Kuramoto

Nobuo Genji

Tatsuo Nakatsugawa

Kazunori Kitagaki

Masakazu Naito

Shinichi Tanaka

Hiromichi Ishibashi

Kenji Asakura

Hiromu Matsuda

Kenji Morimoto

Toshikazu Fujiyoshi

Keiichi Yubakami

Toshimitsu Tachibana

Kazumasa Hayashi

Hiroki Kigami

Masahiro Aizawa

Junichi Moriyama

Ryosuke Shimizu

Hajime Katsushima

Satoshi Yamamura

Atsushi Makitani

Hiroshi Komakine

Hidenori Kunishige

Bunta Hirai

Yuta Kuroki

Asuka Onohara

Keiko Fujiwara

Yuuzou Muraki

Marie Aizuka

An air-permeable adhesive sheet has air permeability in a thickness direction thereof and including an adhesive agent layer having first through holes extending in the thickness direction, wherein at least one surface of the adhesive agent layer forms an adhesive surface, the through holes have an average opening diameter of 1.0 to 50 μm and an average interval of 5 to 400 μm, and a variation in air permeability in the thickness direction is 22% or less as represented by a coefficient of variation of an air permeability measured according to Method B for air permeability measurement (Gurley method) specified in JIS L 1096: 2010, with an effective measurement area as a predetermined value selected from 0.5 to 2.0 mm. The air-permeable adhesive sheet is a sheet capable of obtaining good characteristics such as air permeability even when being made into a sheet having a small area.

Air-permeable adhesive sheet and breathable product

The polymer film of the present invention has through holes extending from one principal surface of the polymer film to the other principal surface of the polymer film. The through holes are straight holes having a central axis extending straight, and have a shape in which the area of a cross-section perpendicular to the direction of the central axis increases from the one principal surface of the polymer film toward the other principal surface. This polymer film has passages in its thickness direction, has an unconventional structure, and can be used in various applications, such as in a waterproof sound-permeable membrane, in a waterproof gas-permeable membrane, and in a suction sheet. The ratio a/b of the opening diameter a of the through holes at the one principal surface to the opening diameter b of the through holes at the other principal surface is 80% or is less than 80%.

Polymer film, waterproof sound-permeable membrane, waterproof sound-permeable member, electronic device, electronic device case, waterproof sound transmission structure, waterproof gas-permeable membrane, waterproof gas-permeable member, waterproof ventilation structure, suction sheet, method for holding workpiece by suction on suction unit, method for producing ceramic capacitor, optical film, optical member, and composition

The present invention provides an air-permeable filter capable of maintaining excellent air permeation performance without being clogged even in an environment involving exposure to an oil, oil mist, or ink. The present invention relates to an air-permeable filter including a porous membrane having a surface coated with an oil-repellent agent, the filter being characterized in that a sliding angle of 20 &#x3bc;l of hexadecane or pentadecane on the surface of the filter is 60&#xb0; or less.

Air-permeable filter provided with oil repellency

An acoustic resistor for use in an audio device includes a resin film having air permeability in a thickness direction of the resin film, and the resin film is a non-porous film having through holes formed to extend straight through the resin film in the thickness direction. This acoustic resistor is used in an audio device including: a transducing part that performs conversion between sound and an electrical signal and that includes an acoustic element; a housing enclosing the transducing part and having at least one opening; and a passage for gas that is present inside the housing and communicates with the opening and in which the acoustic element is placed. The acoustic resistor is placed between the opening and the acoustic element in the passage. The variation in properties of the acoustic resistor of the present disclosure can be made smaller than that of conventional acoustic resistors.

Acoustic resistor, acoustic resistor member including same, and audio device including same

A porous electrode sheet () includes a resin film () being transparent and having insulating properties, and a transparent electrode () placed on one face () of the resin film (). The resin film () is provided with a plurality of through holes () extending linearly from the one face () to the other face (). The transparent electrode () has openings () at positions corresponding respectively to the through holes (). The through holes () of the resin film () and the openings () of the transparent electrode () communicate with each other, and thereby form passages () penetrating the porous electrode sheet () in the thickness direction.

Porous electrode sheet, method for producing the same, and display device

This DC-DC converter circuit includes: first and second switching elements (S, S); an output transformer (T) that includes a first primary winding (P) connected in series between the positive electrode sides of the first and second switching elements (S, S), a second primary winding (P) connected in series between their negative electrode sides, a secondary winding (S) for obtaining an output voltage, and tertiary windings (n, n); a first voltage source (C), connected between a first connection point at which the first primary winding (P) is connected to the second switching element (S) and the first switching element (S), that applies a voltage to the first switching element via the first primary winding; a second voltage source (C) connected to locations symmetric with those of the first voltage source (C); and a control unit (CT) that turns the first and second switching elements (S, S) alternatingly ON and OFF, and first and second regeneration snubber circuits (SN, SN) for regenerating the charge in snubber capacitors (C, C) to the voltage sources (C, C); and these regeneration snubber circuits (SN, SN) include third and fourth switching elements (S, S) driven by the output voltages of the tertiary windings (n, n).

DC-DC converter circuit

An optical scan apparatus includes an optical deflection unit (), an image formation optical system (), and curved surface mirrors (to). Light fluxes from the image formation optical system () come onto the deflection surface () of die optical deflection unit () in an oblique direction. Light fluxes from the optical deflection unit () come onto the curved surface mirrors (to) in an oblique direction. When a boundary is a plane () including a normal at the center of the deflection surface () and parallel to the main scan direction, the curved surface mirrors (to) are arranged in the same space divided by the boundary and the scan speeds of fluxes scanning the surfaces to be scanned (to) are almost identical. Thus, it is possible to obtain identical drive frequencies of the light sources (to), thereby simplifying the circuit.

Optical scan apparatus and color image formation apparatus

An image reading device comprising a rotary polygon mirror () for scanning a light flux from a light source (), an imaging optical system () for forming on a reflection plane of the mirror () a linear image larger than the width in a main scanning direction of the one reflection plane, and a curved-face mirror (), wherein the light source (), the imaging optical system (), the rotary polygon mirror () and the curved-face mirror () are disposed in different positions in a sub-scanning direction, a light flux from the imaging optical system () shines obliquely onto the polygon mirror (), and a light flux reflected off the mirror () beams obliquely onto the curved-face mirror (). Since one curved-face mirror can beam a light flux reflected from the rotary polygon mirror onto a surface to be scanned and the rotary polygon mirror having a small inscribed radius and many reflection planes can be used, satisfactory optical performance and high-speed feature can be realized.

Optical scanning device, image reading device provided with this, image forming device, and photographing device

An image heating device comprises a cylindrical heating roller with a Curie temperature of 210&#xb0; C., a magnetization coil for magnetizing the heating roller with an alternating magnetic field, which is arranged inside the heating roller, and a nip portion for heating a recording material that carriers a toner image with heat from the heating roller, while the recording material is being conveyed along said nip portion. The ratio between the amount of heat generated in said heat-generating member at Curie temperature or higher to the amount of heat generated at room temperature in said heat-generating member is not more than &#xbd;. With this configuration, the heating roller can regulate its own temperature to stabilize at a temperature that is suitable for fixing, and the problems of partial overheating or underheating, unstable heat generation, or damage of the device can be eliminated.

Image heating device and image forming device using the same

A color electrophotographic apparatus with a developing unit for one color larger than the developing units for the other colors, comprising a first optical path where the laser signals irradiated from a laser exposure device reach a mirror at the central portion of a columnar assembly of image forming units and a second optical path where the laser signals reflected by the mirror reach and expose the photoconductor of the image forming unit at the image forming position formed between two adjacent developing units is provided.

Color electrophotographic apparatus having a split toner reservoir

An image heating device comprises a cylindrical heating roller with a Curie temperature of 210.degree. C., a magnetization coil for magnetizing the heating roller with an alternating magnetic field, which is arranged inside the heating roller, and a nip portion for heating a recording material that carries a toner image with heat from the heating roller, while the recording material is being conveyed along said nip portion. The ratio between the amount of heat generated in said heat-generating member at Curie temperature or higher to the amount of heat generated at room temperature in said heat-generating member is not more than 1/2. With this configuration, the heating roller can regulate its own temperature to stabilize at a temperature that is suitable for fixing, and the problems of partial overheating or underheating, unstable heat generation, or damage of the device can be eliminated.

Color image forming apparatus comprising a regular mode and a high speed

A multi-color electrophotographic apparatus is provided which includes a casing having an access cover, an image transfer belt unit for transferring a multi-colored image formed thereon a recording sheet, and an image-forming assembly having a plurality of image-forming units. Each image-forming unit includes a photoconductor and a developer storing therein toner of a single different color for forming a different color toner image on each photoconductor. The image-forming assembly is arranged to be movable between operative and inoperative positions. The operative position is such that each image-forming unit lies at an image-forming station with the photoconductor thereof in engagement with an image transfer belt of the image transfer belt unit to transfer the toner image formed thereon in registration with one another to the image transfer belt for forming the multi-colored image. The inoperative position is such that all the photoconductors of the image-forming assembly are out of engagement with the image transfer belt for allowing an apparatus operator to unload the image transfer belt unit from the casing through the access cover without damaging each photoconductor due to rubbing with the image transfer belt.

Multi-color electrophotographic printer having multiple image forming

A color electrophotographic apparatus for forming color images has advantages of compact and simple construction, easy positioning of an exposure position and easy inspection. The apparatus includes a plurality of rotatable image forming units corresponding to the number of colors, each of the units including a pivotable photosensitive member on which a toner image is formed and a developing device containing a color toner. The apparatus further includes an exposure device for exposing a toner image by emitting a signal light from outside of the image forming units and a mirror for reflecting the signal light to an exposure position, the mirror being placed in the neighbor of a rotation axis.

Color electrophotographic apparatus and image forming units used therein

A color electrophotographic apparatus using a plurality of image forming units. The entire image forming unit group moves by rotation, and a toner image is transferred on an intermediate transfer belt at an image forming position. The intermediate transfer belt is variable in speed, and while the image forming unit group is moving, it is stopped or runs at low speed. The hopper in the image forming unit is divided into two sections. The toner is supplied the image forming position, and when the toner remainder sensor detects no remaining toner, the image forming unit group rotates by one revolution or more, and then the toner remainder is detected again to judge presence or absence of toner remainder. At this time, the toner in the toner hopper is agitated by the agitating member and the shape of the inner wall. After rotary move of the image forming unit group, each image forming unit is initialized sequentially. The side walls of the signal light optical path are composed of image forming units, and the color of the side walls is black. The gap between two adjacent signal forming units is 20 mm or less. One erase lamp of the photosensitive member is provided near the image forming position. During rotary motion of the image forming unit group, it is controlled so as not to disturb the toner image on the intermediate transfer belt.

Color electrophotographic apparatus having an intermediate transfer belt

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Ibaraki, Japan

Hajime Yamamoto