baber/WOPTO huggingface dataset:
Patent JP-2003516208-A (JP)
Title: ボールの洗浄および磨き装置
IPC: A63B71/04
Filed: 1999-12-08
Abstract: (57)【要約】
ボールの洗浄および磨き装置は、ハウジングと、該ハウジングから鉛直上向きに延出しており、円筒状の内側表面を有する洗浄室と、該洗浄室内に複数のゲーム用ボールを支持するようになっており、ゲーム用ボールと接触した状態の洗浄用布を備えるターンテーブルと、該ターンテーブルに対して相対的に回転するとともに、ゲーム用ボールを互いに離れた状態にするためにターンテーブルの上部に同軸上に設けられたインペラと、ゲーム用ボールが洗浄用布で擦られるように、ターンテーブルを回転させるために該ターンテーブルに連結された電動式モータとから構成されている。洗浄室の内側表面には、円周方向に略均一に間隔を空けて配置された複数の隆起部を有するクッションライニングが設けられている。また、この装置は洗浄液が空になった際、新しいものと取り替えられる搾り出し可能な透明の液体容器を使用する。
Patent JP-2003518026-A (JP)
Title: ワイン製造からの残留物についての使用
IPC: A61P17/06
Filed: 2000-12-13
Abstract: (57)【要約】
本発明は、ワイン製造からの残留物についての、化粧品配合物および／または医薬品配合物製造における活性物質組成物としての使用を開示する。
Patent JP-2003518873-A (JP)
Title: パケットスイッチにおける転送オーバライド
IPC: H04L12/56
Filed: 2000-12-22
Abstract: (57)【要約】
データパケットのための転送用エントリを選択するために、データパケットに含まれるヘッダの内容を用いて、メモリが連続的にサーチされる。該サーチは、異なるプロトコルレイヤにつき１つのヘッダフィールドを使用する。転送用エントリに記憶されているネクストフィールドが、別のサーチが必要であるかどうかを判断するのに使用される。データパケットは、連続的なサーチの最終のサーチで選択された転送用エントリに記憶されている転送オーバライドに従って転送される。受信データパケットは、ホストプロセッサに転送されるか、該スイッチ経由で転送されるか、該ホストプロセッサおよび該スイッチ経由の両方に転送されるか、または、選択された転送オーバライドによっては転送されないこともある。
Patent JP-2003524330-A (JP)
Title: 短いメッセージサービス（ｓｍｓ）メッセージを送信および受信するためのシステム
IPC: H04W52/02
Filed: 2001-01-26
Abstract: (57)【要約】
無線通信システム上で放送SMSメッセージにアクセスするシステム。基地局は放送チャンネル上で定期的および非定期的にSMSメッセージを送信する。基地局はSMSメッセージを提供する各加入者サービスのために放送チャンネルに定期的スロットを配置し、モバイルユニットにスロットパラメタを送信する。スロットパラメタ情報を使用して、モバイルユニットは放送チャンネルを走査するために定期的に起上がる。放送SMSメッセージの各カテゴリの期間が異なり、その期間は単一の放送チャンネルに適用してもよい。非定期的に到着するメッセージは待ち行列されることができ、予めスケジュールされた放送チャンネルフレームで送信される。特定の送信期間より大きい到着間の間隔を有するメッセージは簡単に繰り返される。
Patent JP-2003521921-A (JP)
Title: 植物ａｄｐグルコースピロホスファターゼ、その製造方法、アッセイ装置及びトランスジェニック植物の製造におけるその使用
IPC: G01N33/66
Filed: 2001-02-01
Abstract: (57)【要約】
本発明はＡＧＰＰａｓｅ、ＡＤＰグルコースピロホスファターゼ／ホスホジエステラーゼ、該酵素を獲得し、精製しそして特徴付けるための方法を記述している。本発明はまた、ヌクレオシド二リン酸糖レベルの定量のためのアッセイ装置の製造における、及びデンプン含量が低く、且つ高い塩分抵抗性を示すトランスジェニック植物の獲得における、ＡＧＰＰａｓｅの使用をも記述している。
Patent JP-2003525284-A (JP)
Title: ディスコデルモリドの生物活性類似体
IPC: C07C271/22
Filed: 2001-02-28
Abstract: (57)【要約】
本発明は、免疫調節および/または癌治療のために有利に用いることができる、生物活性ディスコデルモリド化合物の新規組成物を提供する。本発明の化合物は、チューブリン重合剤として、および微小管安定化剤として、癌の治療において用いるための有用性を有している。本発明はまた、ディスコデルモリド化合物の生物活性の一定の局面に関するディスコデルモリド分子の領域の同定にも関する。
Patent JP-2003526977-A (JP)
IPC: H01P1/20
Filed: 2001-03-06
Abstract: Microstructure materials which can be tuned to a particular range of r.f. frequencies to display particular magnetic permeabilities have been proposed. A typical material is made of an array of capacitive elements e.g. spirals or rolls of conducting material on a non-conducting substrate. These materials can be used as a guide which is effective for the particular band of frequencies to which it is tuned. In one example, the rolls ( 2 a to 2 c) guide magnetic flux along ducts ( 1, 2, 3 ) while rolls ( 4 a, 5 a) guide magnetic flux along ducts ( 4, 5 ). Flux can thus be guided upwardly along duct ( 2 ), along ducts ( 4 and 5 ), and down ducts ( 1, 3 ), or vice versa.
Patent JP-2003527390-A (JP)
Title: 有機カルボニル化合物のバイヤー−ヴィリガー酸化を実施する方法
IPC: C07D315/00
Filed: 2001-02-22
Abstract: (57)【要約】
本発明は、有機カルボニル化合物のバイヤー−ヴィリガー酸化を実施する方法に関する。
Patent JP-2004500517-A (JP)
IPC: H02G3/16
Filed: 2001-03-30
Abstract: The invention relates to a channel-shaped connection device for electrical lines, especially signal and ignition lines, of internal combustion engines. At least one support element ( 2 ) is provided for preferably pre-assembled electrical lines ( 3 ) and components ( 7 ) and can be inserted, preferably pushed into receiving elements ( 4 ) of the channel-shaped connection device ( 1 ).
Patent JP-2003533158-A (JP)
Title: ブラシレスモータ
IPC: H02K1/14
Filed: 2001-04-26
Abstract: (57)【要約】
本発明のモータ（１０）は、回転軸（Ａ）の周りに回転できかつ所定の個数（Ｎ１）の磁極（１２）を有するロータ（２）を有する。さらにモータ（１０）は、ロータ（２）に対して同心で配置されておりかつ２つずつの磁極に対して３つのステータ歯（５）を有するステータ（４）を有している。このステータ歯（５）は回転軸の周りに均一に分散配置されており、互いに隣り合うステータ歯（５）の中心点は互いに１スロットピッチ（Ｐ ｃ ）離隔されている。ステータ歯（５）は、磁極（１２）に対向する自由表面（Ｓ ｓ ′）を有している。各ステータ歯（５）には、ただ１つの突出エレメント（１４）が設けられており、これは、相応する自由表面（Ｓ ｓ ′）からロータ（２）に向かって半径方向に延在している。
Patent JP-2003533932-A (JP)
Title: デュアル・モジュラス・シンセサイザを備える無線周波数処理装置
IPC: H04L7/00
Filed: 2001-05-07
Abstract: (57)【要約】
無線周波数処理装置は、発振信号ｆ１を生成する電圧制御発振器を有する局部発振シンセサイザ回路を含む。Ｎ分周回路は、発振信号ｆ１を受信し、この信号を分周してｆ１／Ｎ発振信号を生成する。デュアル・モジュラス・シンセサイザはＮ分周回路に接続されており、直交モジュラス信号ｆ１／Ｎを生成する。受信回路および送信回路は、局部発振シンセサイザ回路に接続されて動作する。受信回路および送信回路はどちらも、中間無線周波数信号をミキシングしてダウンコンバートするミキサ回路／アップコンバートするミキサ回路の少なくとも二つのミキサ回路を有する。
Patent JP-2003204339-A (JP)
Title: Method for managing communication resources
Inventor: MATSUI AKIRA
IPC: H04L12/40
Filed: 2002-01-08
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method for managing communication resources for realizing a method for managing in a higher grade by clarifying how much bands are assured and which node uses which channel.  <P>SOLUTION: The method for managing the communication resources of an isochronous communication comprises the steps of analyzing an asynchronous communication to be conducted for an IRM to acquire the communication resources, and acquiring a node ID of the node of a transmitting source and information of the channel and the band acquired by the node of the source.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003201554-A (JP)
Title: Method for passivating inside surface of installed piping system
Inventor: KOIKE KUNIHIKO
IPC: F16L58/08
Filed: 2002-01-08
Abstract: <P>PROBLEM TO BE SOLVED: To provide a method capable of easily performing passivation of even existing pipes and newly installed pipes.  <P>SOLUTION: When a piping system (1) of a semi-conductor manufacturing apparatus, a medicine manufacturing apparatus, or the like with pipes provided thereon is newly installed or additionally installed provided, an ozone treatment unit (4) comprising an ozone gas source (8), an ozone gas decomposition appliance (9), a vacuum pump (10), and instruments is connected to the newly or additionally installed piping system (1), and ozone gas is reacted with inside surfaces of the piping system (1) to passivate the inside surfaces of the piping system (1) in contact with the gas.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003209449-A (JP)
Title: Volume controller
Inventor: TANIGUCHI NOBUNAO
IPC: H03G1/00
Filed: 2002-01-09
Abstract: <P>PROBLEM TO BE SOLVED: To provide a volume controller in which a user is made to recognize a use on a condition requiring the reduction of volume, the volume is controlled by operation of the user and the application of uncomfortable feelings or sense of incompatibility caused by unexpected volume reduction to the user is avoided.  <P>SOLUTION: In a microcomputer 2, when the temperature of an amplifier circuit 6 detected by a thermistor TH is equal to or higher than a prescribed temperature, a caution to reduce the volume is displayed or sounded out by a display part 3 or speaker 7. When the temperature detected by the thermistor TH becomes lower than the prescribed temperature by the operation of a volume control switch 1, that caution is canceled.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003209270-A (JP)
Title: Carbon photoelectric element and its manufacturing method
Inventor: AZUMA HIROZUMI
IPC: H01L31/10
Filed: 2002-01-15
Abstract: <P>PROBLEM TO BE SOLVED: To provide a photoelectric element which has a high quantum efficiency and in which manufacturing steps are simple and have a low cost, and to provide a method for manufacturing the same.  <P>SOLUTION: The carbon photoelectric element comprises a back electrode 15, an n-type conductor layer 14, a nanocarbon molecule layer 13 made of a fullerens or a carbon nanotube, a p-type semiconductor layer 12, and a surface electrode 11. The p-type semiconductor layer 12 is amorphous. Here, the amorphous layer of the p-type semiconductor layer 12 is desired to be a structure- changed layer by emitting a laser beam to the uppermost surface of the carbon nanomolecule layer. The fullurenes are desired to be C<SB>60</SB>. The n-type semiconductor layer 14 can be a silicon substrate.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003209144-A (JP)
Title: Semiconductor device, its manufacturing method, manufacturing equipment for semiconductor device and electronic equipment
Inventor: TAKANO MICHIYOSHI
IPC: H01L21/60
Filed: 2002-01-16
Abstract: <P>PROBLEM TO BE SOLVED: To provide a semiconductor device, its manufacturing method, manufacturing equipment for the semiconductor device and electronic equipment that can reduce the impact of heat on a substrate.  <P>SOLUTION: The manufacturing method for the semiconductor device includes steps for disposing the substrate 20 on a bonding stage 42 and bonding a semiconductor chip 10 to the substrate 20. The part of the bonding stage 42 that contacts at least the substrate 20 is formed by a material of 15 to 30 W.m<SP>-1</SP>.K<SP>-1</SP>in thermal conductivity.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003212135-A (JP)
Title: Vibration isolation structure for electric power steering system
Inventor: YONETANI MITSUHIRO
IPC: F16H55/24
Filed: 2002-01-18
Abstract: <P>PROBLEM TO BE SOLVED: To reduce noises of meshing sound at a connection between an output shaft 5 of an electric assist motor and a worm shaft 6.  <P>SOLUTION: A bevel-gear-shaped meshing element 11 with a taper tooth surface 11a is mounted round an axial end of the worm shaft 6 via a damper 13 of rubberlike elastic material, and a recessed mating meshing portion 12 with a taper tooth surface 12a corresponding to the taper tooth surface 11a is formed at an opposing axial end of the output shaft 5 of the electric assist motor. The damper 13 has a radial portion 13b interposed under axial pre- compression between a radial step face 6b formed on the worm shaft 6 and a back face 11b of the meshing element 11, and restoring force of the radial portion meshes the taper tooth surfaces 11a and 12a together without a backlash.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003217641-A (JP)
Title: Fuel cell system
Inventor: SAKAGAMI YUICHI
IPC: H01M8/04
Filed: 2002-01-22
Abstract: <P>PROBLEM TO BE SOLVED: To utilize waste energy in a fuel cell system.  <P>SOLUTION: An expansion machine 3 for depressing/expanding hydrogen is disposed on the way of a path 10 for feeding hydrogen from a high-pressure tank 1 to a fuel cell 2. The expansion energy of hydrogen expanded in the expansion machine 3 is converted to mechanical energy, and a blower 20 is driven to rotate by utilizing the mechanical energy. The blower 20 has a function of blowing air to a condenser/collector 21 for condensing steam included in the unreacted air emitted from a path 12 of the fuel cell 2.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003213071-A (JP)
Title: Thermoplastic resin composition and method for producing the same
Inventor: KUROKAWA KINYA
IPC: B29K25/00
Filed: 2002-01-24
Abstract: <P>PROBLEM TO BE SOLVED: To provide a thermoplastic composition which has excellent impact- resistant strength, transparency, flowability and rigidity and has other physical properties in a good balance, and to provide a method for producing the thermoplastic composition.  <P>SOLUTION: This thermoplastic resin composition comprises (A) 65 to 94 wt.% of a copolymer comprising 65 to 90 wt.% of an aromatic vinyl monomer and 10 to 35 wt.% of a conjugated diene, (B) 5 to 34 wt.% of a copolymer comprising 70 to 85 wt.% of an aromatic vinyl monomer and 15 to 30 wt.% of a (meth)acrylate-based monomer, and (C) 0.1 to 10 wt.% of a copolymer comprising 60 to 85 wt.% of an aromatic vinyl monomer and 15 to 40 wt.% of an unsaturated nitrile monomer.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002266725-A (JP)
Title: Fuel injector assembly and internal combustion engine including the same
Inventor: JIANG HE
IPC: F02M61/16
Filed: 2002-01-24
Abstract: PROBLEM TO BE SOLVED: To improve fuel economy and an exhausting property by controlling fuel injection pressure and an injection speed. SOLUTION: In order to promote fuel pressurizing, a control valve is provided, which is actuated by a piezoelectric element via a hydraulic amplifier. In order to control the displacement amount of the hydraulic amplifier and to control a fuel injection amount by controlling the displacement amount of the control valve, the piezoelectric element is excited by a variable voltage source. The control valve has a configuration so as to give fuel injection in multiple stages, the low fuel injection pressure and the injection speed, and high fuel injection pressure and an injection speed succeeding thereto. The fuel injection in multiple stages can be achieved by controlling an exciting voltage level to the piezoelectric element.  A pressure check valve is provided so as to lead fuel into a hydraulic amplifier chamber for excluding bubbles confined in the hydraulic amplifier chamber, to compensate fuel leakage from the chamber, and to make the fuel circulate through the chamber.
Patent JP-2003218715-A (JP)
Title: Receiver
Inventor: IMAI JUNSHI
IPC: H04B1/10
Filed: 2002-01-25
Abstract: <P>PROBLEM TO BE SOLVED: To constitute a compact, low-cost and simple receiver which prevents an operating clock signal generated in the receiver from interfering with desired radio waves.  <P>SOLUTION: A flow chart in Fig. 2 shows a process directly related to a clock frequency F in 'a receiving frequency band setting block 2' and 'an operating clock setting block 3'. The flow chart includes: a step 220 of inputting a CH control signal; a step 240 of outputting a center frequency f<SB>c</SB>and a band width fBW of a frequency band ch corresponding to a desired channel to the operating clock setting block 3; and a step 260 (subroutine) conducted in the operating clock setting block 3 to obtain a value f satisfying two conditional expressions 'f<SB>c</SB>-fBW/2>(N-1)×f' and 'f<SB>c</SB>+fBW/2<N×f'. If an oscillation frequency F of the operating clock is previously set to the value f satisfying them, the interference with receiving signals (radio waves) can be prevented.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003224943-A (JP)
Title: Sealed permanent magnet body, and permanent magnet rotor therewith
Inventor: SAITO SHIGEO
IPC: H02K1/27
Filed: 2002-01-25
Abstract: <P>PROBLEM TO BE SOLVED: To provide a sealed permanent magnet body, capable of easily preventing a large-sized metal magnet from rusting and at low cost by airtightly sealing a metal magnet, before subjecting it to rust-preventive treatment with a metal wrapping material, and capable of facilitating reuse of the metal magnet material.  <P>SOLUTION: This sealed permanent magnet body 20 is constructed by airtightly sealing the metal magnet, before rust-preventive treatment with the metal wrapping material 22. The metal wrapping material 22 is formed by brazing a lid body on an opening in a metal pipe, with one end closed or sticking it through an elastic sealing material. This permanent magnet rotor is constructed by fitting the sealed permanent magnet bodies to an annular magnet retainer 11 serving as a rotor body section.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003217626-A (JP)
Title: Compressed air feed system for fuel cell
Inventor: NISHIMURA HITOSHI
IPC: H01M8/04
Filed: 2002-01-25
Abstract: <P>PROBLEM TO BE SOLVED: To operate a motor without a stop even when no load is present on a fuel cell side, and to reduce the power consumption of a compressor body in a no-load operation in a vehicle-mounted system or the like for feeding compressed air to the fuel cell side by using the compressor body and the motor.  <P>SOLUTION: An air release solenoid valve 18 and a two-way solenoid valve 19 are provided in discharge pipes 16a and 16 to connect a discharge port 8 of a compressor body 1 to the fuel cell 14, the air release solenoid valve 18 is opened to reduce the pressure of the discharge air and release the discharge air while keeping the minimum rotational speed of a motor 11 when the fuel cell side is in a non-load operation, and the two-way solenoid gate valve 19 is closed to block the air flow to the fuel cell side. In addition, the rotational speed of the motor 11 is further reduced while keeping the condition, and the power consumption of the compressor 1 is reduced.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003210939-A (JP)
Title: Method for preventing emission of dioxins and related compound
Inventor: ONO AYUMI
IPC: B01D53/34
Filed: 2002-01-25
Abstract: <P>PROBLEM TO BE SOLVED: To prevent stably and surely the emission of dioxins in an incinerator, such as a semi-continuous feed incinerator or mechanical batch-type incinerator, of which start-up and shutdown are made on the same day.  <P>SOLUTION: In an incinerator, of which start-up and shutdown are made on the same day, 50-300 mg/Nm<SP>3</SP>of powder active-carbon and 600-3,000 mg/Nm<SP>3</SP>of sodium bicarbonate are added to the flue gas. Amount of addition of the chemicals is increased in the start-up and shutdown operation more than that in the stationary operation.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003210443-A (JP)
Title: Image reading method and device
Inventor: AGANO TOSHITAKA
IPC: G01N23/04
Filed: 2002-01-28
Abstract: <P>PROBLEM TO BE SOLVED: To suppress deterioration of an image quality such as an S/N of a regeneration image by effects of residual charge left in a radiation solid detector 10 by irradiation of excessive radiation when recording past radiation image information in an image reading method and device reading the image signal by the irradiation of a reading light L2 from the radiation solid detector 10 having the radiation image information recorded by the irradiation of a recording light L1.  <P>SOLUTION: This image reading device stores a time elapsed from a time recording the past image information in the radiation solid detector 10 to a time recording the next radiation image information as well as the past image signal read from the past image information recorded in the radiation solid detector 10 in the past and the image signal is corrected based on the recorded past image signal and the elapsed time.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003228361-A (JP)
Title: Image display device for pachinko game machine, its display method, and computer program therefor
Inventor: TOMITA SHIGEHIRO
IPC: G09G5/36
Filed: 2002-02-01
Abstract: <P>PROBLEM TO BE SOLVED: To provide an image display device for pachinko game machine which can enlarge and display a part of display without the need for redrawing into a frame memory.  <P>SOLUTION: The image display device for pachinko game machine which enlarges and displays a part of image data stored in the frame memory 6 on itself is characterized in that it is constituted of a 1st means of setting an enlargement area 11 in the frame memory 6, an enlargement rate for enlarging the said area, and a display area 12 for displaying the enlarged image on the display device and a 2nd means of deciding whether a display position is in the area 12 where the enlarged image is displayed when the image is displayed according to a parameter 7 set by the 1st means and outputting coordinate data on the enlarged part 11 to the frame memory 6 when the display position is in the display area 12.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2002325088-A (JP)
Title: Data transfer system and equipment thereof
Inventor: NAKASHIGE AKIRA
IPC: H04L12/721
Filed: 2002-02-04
Abstract: PROBLEM TO BE SOLVED: To own jointly data by a transmitter and a receiver safely, and make tapping difficult without distributing a cipher key (secret key) previously to the transmitter and the receiver. SOLUTION: This data transfer system transfers data from transmission origin equipment to transmission determination equipment via a plurality of repeaters in a network. The transmission origin equipment is provided with a means for adding route information to data to be transferred and transferring the data to a first repeater designated by the route information. The route information designates a communication route which passes a plurality of repeaters reaching the transmission destination equipment. Each of the repeaters in the network is provided with a means for transferring the data to be transferred which contain the route information to a repeater, or the transmission destination equipment which are designated as the next transfer object of the self equipment, on the basis of the route information added to the data to be transferred.
Patent JP-2003226514-A (JP)
Title: Method of producing polycrystal sheet
Inventor: YOSHIDA KOJI
IPC: C01B33/02
Filed: 2002-02-04
Abstract: <P>PROBLEM TO BE SOLVED: To reduce the labor for fairing a polycrystal sheet by using a dicer or the like and to improve the productivity by providing a base body first surface and a base body second surface having different heights on a base body surface which is brought into contact with a melt of a semiconductor and on which the polycrystal sheet is solidified and grown, and to provide an inexpensive solar battery.  <P>SOLUTION: In a method for producing the polycrystal sheet, wherein a melt section of the semiconductor material accommodated in a crucible and a base body comprising a heat resistant material, which is brought into contact with the melt under an inert atmosphere, are provided, a base body first surface and a base body second surface are allowed to have different heights to each other. Thereby, a polycrystal sheet part used as a product is divided from the other polycrystal sheet part.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003225691-A (JP)
Title: Method for removing dissolved oxygen in raw water
Inventor: HORI AKISHI
IPC: C12N1/00
Filed: 2002-02-05
Abstract: <P>PROBLEM TO BE SOLVED: To safely remove dissolved oxygen in water at a low cost.  <P>SOLUTION: Dissolved oxygen in raw water is removed by bringing the raw water into contact with an aerobe. Dissolved oxygen in the raw water is removed by allowing an electron donor to be present in the reduction equivalent corresponding to 1 to 10 times of the oxidation equivalent of the dissolved oxygen in the raw water. The obtained deoxygenized water is supplied to a use point while suppressing contact with oxygen.  <P>COPYRIGHT: (C)2003,JPO
Patent JP-2003237961-A (JP)
Title: Sheet feeder, automatic document reader, feeder and image forming device
Inventor: NAKANE YOSHIMITSU
IPC: G03G15/00
Filed: 2002-02-08
Abstract: <P>PROBLEM TO BE SOLVED: To provide a sheet feeder, an automatic document reader, a feeder and an image forming device that can stably feed various types of sheets without reducing the number of sheets capable of being fed.  <P>SOLUTION: The sheet feeder, the automatic document reader, the feeder and the image forming device have the following typical structure. An attraction belt unit 1 so designed that a sheet is brought in contact with an attraction surface to be attracted, and the sheet is moved to the attraction surface to be separated and fed, has: an image forming device operation part 46 including a detecting means for detecting an using environment (temperature, humidity), a sheet type detecting means for detecting a sheet type, a sheet basis weight detecting means for detecting a sheet basis weight, and a sheet size detecting means for detecting a sheet size; and a CPU 31 for controlling the attraction, separation and feeding of the sheet in dependence on detection information by the image forming device operation part 46.  <P>COPYRIGHT: (C)2003,JPO