Murata Manufacturing Co., Ltd.

Mita Industrial Co., Ltd.

Keizo Yamamoto

Katsuhiro Yoshiuchi

Masahiko Nakao

Hiroshi Nonogaki

Tatsuhiro Nakamura

Yuichi Kushihi

Kazuhisa Yamaki

Yoshitaka Tanino

A dielectric lens which is produced by injection molding of an expandable material consisting of a synthetic resin, a foaming agent and a dielectric constant conditioner. The expandable material is injected into a cavity of a foaming mold up to at least about 80 percent by weight and at least about 100 percent by volume of the capacity of the cavity and is foamed at an expansion ratio of not more than about 1.3. During the foam molding, the surface of the foam-molded body is solidified to be a radome layer. Then, the foam-molded body is transferred from the foaming mold to a shaping mold, in which the foam-molded is cooled down naturally. Further, a fitting tab is provided integrally with the foam-molded body at the edge of the radome layer.

Method of manufacturing a dielectric lens for an antenna

The invention provides an electronic part comprising an electronic-part body comprising: composite-material body made of synthetic resin in which ceramic powder as a functional material and a catalytic agent to make plating practicable are dispersed; and a layer of composite material of synthetic resin in which ceramic powder as a functional material is dispersed, said layer covering the external surface of said composite-material body except the portion in which an electrode is to be disposed; and an electrode disposed on the external surface of said electronic-part body. The above described electronic part is excellent in the freedom of shape, high in dimensional accuracy, and it is easy to realize the intended electrical characteristics.

Electronic part and a method of manufacturing the same

The present invention is for providing a production method of a dielectric lens with the excellent productivity, capable of achieving the shape accuracy or density homogeneity of the demanded level, and capable of injection molding of a matching layer without forming a gap with respect to a lens main body. A lens main body is formed by the injection compression molding method, using a composite dielectric material containing a thermoplastic resin as the dielectric material for the lens main body. After forming a matching layer (first surface side matching layer) on either surface of the front or rear surfaces (first surface) side of the lens main body, and injecting a matching layer material, a matching layer (second surface side matching layer) is formed on the other surface of the lens main body (that is, the matching layer is formed by the two operation injection molding method of injecting to one surface side of the lens main body, and then injection to the other surface side).

Production method of dielectric lens

An image forming apparatus that includes an image reading section, a transportation path, a photoreceptor, transferring area, a fixing area, and a feeding speed controller. The feeding speed controller selects the speed at which an original document passes through the image reading section between two speeds. A first speed is used when the transfer sheet is normal sized and for a period of time prior to a large sized sheet entering the fixing area. Once a large sized sheet enters the fixing area, the feeding speed controller changes the speed of the original document from the first speed to the second speed to provide proper scaling of the reproduced image on the transferred sheet. The second speed may be adjusted depending on the type of transfer sheet being used to take into account the amount of stretching of the material used to make the transfer sheet.

Smooth transfer sheet roller transport

A roll sheet cutter mechanism for an image forming apparatus is provided which is adapted to cut a roll sheet 4 paid out of a feed reel 51 between a rotary blade 82 and a stationary blade 81. When the leading edge of the transported roll sheet 4 passes over the rotary blade 82 located at a guiding position, the rotary blade 82 guides the leading edge of the roll sheet 4 in a transportation direction. The rotary blade 82 returns to a cutting stand-by position before the tail edge portion of the roll sheet 4 passes over the rotary blade 82. Therefore, the occurrence of jam of the roll sheet due to the curling thereof can assuredly be prevented. Further, time loss can be eliminated because the rotary blade is adapted to return to the cutting stand-by position.

Roll sheet cutter mechanism for use in image forming apparatus

A copying machine that is capable of copying a large-size document original on a transfer sheet is provided in which the transfer sheet is prevented from being skewed from the desired transport path. In one embodiment, this bypass transportation path for a cut-sheet extends to a photoreceptor drum and is provided with a resist roller and a downstream transportation roller. A cut-sheet inserted from a manual sheet feeding section is stopped with its leading edge abutting against the resist roller, so that the leading edge of the cut-sheet is aligned with a line perpendicular to a transportation direction of the sheet. The cut-sheet is then transported by the resist roller and the transportation roller. At this time, the circumferential speed of the resist roller is slower by a predetermined degree than the circumferential speed of the transportation roller. Thus, a predetermined tensile force is constantly applied to the cut-sheet transported from the resist roller to the transportation roller to prevent the cut-sheet from being skewed during transport even when a large-size cut-sheet is used as the transfer sheet. Also, to avoid non-smooth transport of a sheet, the first slower roller, which the transport sheet contacts before contacting the faster second roller, is sped up just before the trailing edge leaves the first roller to avoid roller vibration due to immediate tension release in the sheet.

Growing community of inventors

Osaka, Japan

Keizo Yamamoto