baber/WOPTO huggingface dataset:
Patent JP-2012514756-A (JP)
Title: 改良された温度計算を有するプロセス温度トランスミッタ
IPC: G01K7/20
Filed: 2010-01-08
Abstract: プロセス温度トランスミッタ（１２）において、プロセス温度出力を提供する方法（１００）が記載されている。方法（１００）は、基準抵抗器（３４）および測温抵抗体（ＲＴＤ）（３２）を含む回路を流れる測定電流を提供することを含む。測定電流が基準抵抗器の中を流れるときに、基準抵抗器をはさむ第１の電圧は測定される（１０２）。測定電流がＲＴＤの中を流れると共に、ＲＴＤ（３２）をはさむ第１の電圧が同様に測定される（１０４）。ＲＴＤ（３２）の第１の抵抗は、測定された基準抵抗器（３４）をはさむ電圧および測定された第１の電圧に基づいて算出される。第１のプロセス温度出力は、ＲＴＤ（３２）の第１の抵抗に基づいて与えられる。測定電流がＲＴＤの中を流れるときに、ＲＴＤ（３２）をはさむ第２の電圧はその後測定される。その後、ＲＴＤ（３２）をはさむ測定された第２の電圧および基準抵抗器（３４）をはさむ測定された第１の電圧に基づいて、基準抵抗器（３４）をはさむ第２の電圧が推定される。ＲＴＤ（３２）をはさむ第２の抵抗は、測定された第２の電圧および推定された第２の電圧に基づいて算出される。第２のプロセス温度出力は、第２の抵抗に基づいて与えられる。
Patent JP-2012514718-A (JP)
Title: 空気圧縮機の前潤滑システム
IPC: F04B39/02
Filed: 2010-01-25
Abstract: 空気圧縮機の前潤滑システムは、オイルポンプと、プライミングタンクと、制御弁とを備える。オイルポンプは、オイルサンプに接続され、空気圧縮機に接続された吐出ラインを備える。プライミングタンクは、加圧油を受け入れるために、オイルポンプに接続される。制御弁は、プライミングタンクに接続された出口ラインに設けられ、さらに、オイルポンプの吐出ラインに接続される。プライミングタンクは、オイルポンプからの油の充填を維持すると共に制御弁の作動を通して油の充填を選択的に解放するようになっている。プライミングタンクを前潤滑補助オイルポンプに代えてもよい。前潤滑補助オイルポンプは、オイルサンプに接続されると共に空気圧縮機に導く吐出ラインに流体連結されている。
Patent JP-2012518377-A (JP)
Title: 電気機械−モジュラー
IPC: H02K21/26
Filed: 2010-02-12
Abstract: 電気機械（１００）は、固定子（１１２）と、該固定子に対して回転子軸のまわりに回転するよう取り付けられた回転子（１１４ａ，ｂ）とを具える。永久磁石（１２４ａ，ｂ）が回転子に担持される。回転子は出力部（１９０）を有する。固定子は、磁石と相互作用するために固定子鉄心（１１６）に巻かれたコイル（１２２）を有する。回転子は、固定子鉄心の各端部に１つ配置された２つのステージ（１１４ａ，ｂ）有し、前記鉄心の端部と前記回転子のステージとの間に２つのエアギャップ（１２６ａ，ｂ）が設けられる。少なくとも２つの十分なモータの磁束経路がある。第１の経路は軸（１２０）に対し実質的に外周面上にある回路内の隣接コイル間を通る。第２の経路３０'は軸方向面にあり、軸受の回りを通る。   固定子のコイルは回転子軸のまわりに間隔をおいているとともに、固定子の第１の、固定子半径（Ｒ 1 ）よりも遠い位置で前記回転子軸に近接している。軸受は、回転子の第２の、回転子半径（ｒ）よりも遠い位置で回転子の表面上で回転する回転要素を含み、回転子半径は固定子半径の６０％から９０％の間である。
Patent JP-2012518720-A (JP)
Title: 各種高強度鋼の生産に適するフレキシブルな帯鋼処理ライン
IPC: C21D9/60
Filed: 2010-02-25
Abstract: 順次に設けられたアンコイリング及び洗浄ステーション、加熱ステーション、均熱ステーション、徐冷ステーションの後、ハイ水素ジェット冷却ステーションと水焼入れ冷却ステーションが並行に設けられ、ハイ水素ジェット冷却ステーションの後に、再加熱ステーション、オーバーエージングステーション、最終冷却ステーション、テンパーステーション、フィニッシュステーション、塗油ステーション及び巻取りステーションが順次に設けられ、水焼入れ冷却ステーションの後に、酸洗ステーション及び電気めっきステーションが順次に設けられ、溶融亜鉛めっきステーションは再加熱ステーションの後に接続され、めっき層合金化焼鈍しステーションは溶融亜鉛めっきステーションの後に接続されるとともに、接続通路を介して前記の最終冷却ステーションに接続され、前記の酸洗ステーション及び電気めっきステーションは、それぞれ接続通路を介して再加熱ステーションに連通され、前記の電気めっきステーションは、接続通路を介してアンコイリング及び洗浄ステーションに直接に連通され、前記の水焼入れ冷却ステーションは、固定されたバイパスを介して徐冷ステーションに連通され、前記の再加熱ステーションの後には、移動可能なバイパスを介してオーバーエージングステーションが連通される。本発明によれば、各種高強度鋼の生産を、一つの装置に統合させて、フレキシブルな生産を実現した。
Patent JP-2012519130-A (JP)
Title: 高純度シリコンを製造するための流動床反応器
IPC: C01B33/03
Filed: 2009-11-20
Abstract: 内表面上に堆積した１層以上の保護層を有する流動床反応器を含む、高純度シリコンの製造方法および製造装置である。保護層は流動ガスおよびシリコン含有ガスによる腐食に耐久性がある。
Patent JP-2012519443-A (JP)
Title: 移動局のハンドオーバを機能強化する方法およびその方法を実行する基地局
IPC: H04W40/24
Filed: 2010-02-25
Abstract: 本発明は、セルラ・ネットワークのサービング基地局（１）から新しい基地局への移動局（２０〜２３）のハンドオーバを機能強化する方法に関し、新しい基地局は、その無線カバレージ・セル（ｒ２〜ｒ８）が前記サービング基地局（１）の無線カバレージ・セル（ｒ１）とオーバーラップする隣接基地局を含む隣接リストの中で選択される。この方法を実行する基地局も提供される。本発明によれば、前記移動局（２０〜２３）がその中に配置されている現在のセクタ（ｓ１〜ｓ３、ｓ１〜ｓ６）が、前記サービング基地局（１）の無線カバレージ・セル（ｒ１）を区分する複数のセクタ（ｓ１〜ｓ３、ｓ１〜ｓ６）の中で判定され、隣接リストは、その無線カバレージ・セル（ｒ２〜ｒ８）が前記現在のセクタ（ｓ１〜ｓ３、ｓ１〜ｓ６）とオーバーラップする隣接基地局だけを含む。
Patent JP-2013140309-A (JP)
Title: Shake correction device, lens barrel, and optical device
Inventor: SATO KOJI
IPC: G03B5/00
Filed: 2012-01-06
Abstract: PROBLEM TO BE SOLVED: To provide a shake correction device which is compact and inexpensive, and reduces the rotation of a shift member in a plane perpendicular to an optical axis.SOLUTION: The shake correction device includes: a shift member for holding a lens; a first driving part for moving the shift member, relative to a body part, in a first direction in a plane perpendicular to the optical axis; and a second driving part for moving the shift member, relative to the body part, in a second direction different from the first direction in the plane perpendicular to the optical axis. The first driving part is constituted by arranging a first magnet, a first coil, and a first yoke in order in the optical axis direction. The second driving part is constituted by arranging a second magnet, a second coil and a second yoke in order in the optical axis direction. The first yoke has a projecting portion projecting in the first direction at its end extending in a direction perpendicular to the first direction. The second yoke has a projecting portion projecting in the second direction at its end extending in a direction perpendicular to the second direction.
Patent JP-2013145672-A (JP)
Title: Flat wire
Inventor: OKAMOTO RYOYA
IPC: H01B7/08
Filed: 2012-01-13
Abstract: PROBLEM TO BE SOLVED: To provide a flat wire which is arranged in a compact manner.SOLUTION: A flat wire 10 includes: a first coating part 14 where a conductor part 11 is covered by an insulation coating 13; a second coating part 15 provided at a position different from the first coating part 14 in an extending direction, the second coating part 15 where the conductor part 11 is covered by the insulation coating 13; and a conductor exposed part 16 provided between the first coating part 14 and the second coating part 15 and where the conductor part 11 is not covered by the insulation coating 13. The conductor exposed part 16 has a first exposed part 16A and a second exposed part 16B folded from the first exposed part 16A and overlapping with the first exposed part 16A.
Patent JP-2013144490-A (JP)
Title: Electric power steering device
Inventor: TOYOHIRA TOMOYA
IPC: F16D3/68
Filed: 2012-01-13
Abstract: PROBLEM TO BE SOLVED: To provide an electric power steering device to which a shaft coupling having an appropriate elasticity is mounted.SOLUTION: A shaft coupling 45 of an electric power steering device 10 includes a first member 90 which is provided at a motor shaft 43a of an electric motor 43 and has a plurality of protruding parts 103 extending in a shaft direction, a second member 100 which is provided at the tip end of a worm shaft 46 and has a plurality of protruding parts 103 extending in a shaft direction, and an elastic member 110 which is provided between a protruding part 93 of the first member 90 and a protruding part 103 of the second member 100 in a circumferential direction for transmitting torque. In a protruding part 93 of the first member 90, a counter surface 103a facing the elastic member 110 has a protruding part 93 which protrudes toward the elastic member 110 at the end on the worm shaft 46 side and contacts with the elastic member 110.
Patent JP-2013149455-A (JP)
Title: Method and apparatus of manufacturing membrane electrode assembly of fuel battery
Inventor: NOGI ATSUSHI
IPC: H01M8/02
Filed: 2012-01-19
Abstract: PROBLEM TO BE SOLVED: To provide a technique of a fuel battery in which a catalyst layer is formed at a portion of an electrolyte membrane from which a support film is removed to suppress manufacturing cost of a fuel battery, need no larger manufacturing equipment, and improve mechanical strength.SOLUTION: A method of manufacturing a membrane electrode assembly of a fuel battery includes a first step of forming an electrolyte membrane on one face of a support film, a second step of forming a first catalyst layer on a face of the electrolyte membrane opposite to a face with which the support file contacts, a third step of removing a portion, contacting with the electrolyte membrane, of the support film except for an edge portion, and a fourth step of forming a second catalyst layer on the portion of the electrolyte membrane from which the support film is removed.
Patent JP-2013151310-A (JP)
Title: Container for carbonated water and method of transporting the container
Inventor: IGUCHI YUKINARI
IPC: B65D85/72
Filed: 2012-01-26
Abstract: PROBLEM TO BE SOLVED: To provide a container for carbonated water and a method of transporting the container, capable of improving effect of preventing nasty smell adsorption by the enclosed carbonated water.SOLUTION: A bottle includes a cap 20 sealing a mouth part 14 of a bottle body in which fragrance-free carbonated water is filled. The cap 20 is a single-piece cap. The cap 20 includes: an inner seal ring 30 having an inner seal part 33 brought into pressure contact with an inner circumferential surface 14i of the mouth part 14; an outer seal ring 40 having an outer seal part 43 brought into pressure contact with an outer circumferential surface 14o of the mouth part 14; and a top seal wall 50 having a top seal part 53 brought into pressure contact with a distal end surface 14e of the mouth part 14.
Patent JP-2013157705-A (JP)
Title: Communication device, and control method and program of the same
Inventor: KOIKE KOTARO
IPC: H04W12/75
Filed: 2012-01-27
Abstract: PROBLEM TO BE SOLVED: To reduce the complexity of managing a plurality of authentication IDs issued to each purpose for connecting a network.SOLUTION: A communication device in a network including at least either one of an imaging device or a light-emitting device, comprises: setting means for setting one authentication ID necessary when connected to the network on the basis of input through an operating portion by a user; changing means for communicating with at least either one of the imaging deice or the light-emitting device in the network, and changing the authentication ID set by the setting means to a different authentication ID for each of a plurality of states for executing predetermined imaging processing; and communicating means for communicating with at least either one of the imaging device or the light-emitting device by using the authentication ID changed by the changing means for each of the plurality of the states for executing the predetermined imaging processing.
Patent JP-2013155069-A (JP)
Title: Sapphire single crystal growing apparatus
Inventor: MURASE YU
IPC: C30B29/20
Filed: 2012-01-30
Abstract: PROBLEM TO BE SOLVED: To provide a sapphire single crystal growing apparatus with few commingling of impurities into the sapphire single crystal to be grown although the apparatus is configured relatively inexpensively.SOLUTION: An afterheater member 20 is arranged above a crucible 10, generates heat together with the crucible 10 by passing an electric current through an induction coil 32 to heat a sapphire single crystal body 15 pulled from the crucible 10. The afterheater member 20 is equipped with an exothermic part 22 comprising at least one kind of tantalum (Ta), tungsten (W) and molybdenum (Mo) as a main component, and a coating layer 24 free of oxygen and coating the exothermic part 22. With such configuration, the exothermic part 22 is prevented from oxidation while the exothermic part 22 is composed of relatively inexpensive high melting point metals.
Patent JP-2013155963-A (JP)
Title: Device and method for controlling cooling tower fan
Inventor: MATSUO HIROKO
IPC: F28B11/00
Filed: 2012-01-31
Abstract: PROBLEM TO BE SOLVED: To determine a cooling tower exit temperature set value that is always optimum regardless of performance change of a cooling tower.SOLUTION: A relationship between an approach (difference between a cooling tower exit temperature and an outside air wet-bulb temperature) of a cooling tower and a fan wind volume is defined as an inversely-proportional relationship. While changing a candidate value TCsp' of a cooling tower exit temperature set value between an upper-limit value and a lower-limit value by using the inversely-proportional relationship between the approach and the fan wind volume, a fan wind volume of the cooling tower for each candidate value TCsp' of the cooling tower exit temperature set value is calculated to be converted to a use energy amount (power) Eb. A total value (ΣE) of a use energy amount Ea of a refrigerator, the use energy amount Eb of the cooling tower fan, and a use energy amount Ec (fixed value) of a cooling water pump is obtained, and used as a total use energy amount E (E= ΣE×K) by being multiplied by an energy conversion coefficient K. A candidate value TCsp' minimizing E from among the total use energy amounts E on the basis of the candidate values TCsp' of the cooling tower exit temperature set value is determined as an optimum value TCsp of the cooling tower exit temperature set value.
Patent JP-2013155703-A (JP)
Title: Lubricating structure for internal combustion engine
Inventor: OZEKI HISASHI
IPC: F01M1/06
Filed: 2012-01-31
Abstract: PROBLEM TO BE SOLVED: To efficiently supply a lubricating oil to a camshaft or a cam drive mechanism by improving rigidity or a strength of a cam housing.SOLUTION: In a lubricating structure for an internal combustion engine, a plurality of suction-side support parts 62a-62e pivotally supporting a suction-side camshaft 45 from an upper side and a plurality of exhaust-side support parts 72a-72d pivotally supporting an exhaust-side camshaft 46 from an upper side are provided in an upper part of a cylinder head 40. Either the suction-side support parts 62a-62e or the exhaust-side support parts 72a-72d are connected through reinforcing members 78a-78e to two or more other-side support parts.
Patent JP-2013155858-A (JP)
Title: Cylinder apparatus
Inventor: ASHIBA MASAHIRO
IPC: F16F9/348
Filed: 2012-01-31
Abstract: PROBLEM TO BE SOLVED: To provide a cylinder apparatus that can be optimized in a valve characteristic.SOLUTION: The cylinder apparatus includes an annular valve member 76 which is provided with part of or all of flow paths 95 and is formed with a through-hole 81, a pin member 98 inserted into the through-hole 81 of the valve member 76, and a circular disk valve 110 which is inserted by the pin member 98 and both of whose inner and outer circumferences move from a surface 76a on one side of the valve member 76 to a direction of getting away therefrom or near thereto to open and close the flow paths 95. A protrusion 84 is formed in a periphery of a through-hole 81 of the surface 76a on one side of the valve member 76, while a protrusion 84 is provided circumferentially and partially with a groove 91. Then, a small-diameter portion 116 which extends to the groove 91 and slides on the pin member 98 is provided on an inner circumferential side of the circular disk valve 110.
Patent JP-2013160846-A (JP)
Title: Intermediate hopper and image forming apparatus
Inventor: KIMURA SATOSHI
IPC: G03G15/08
Filed: 2012-02-02
Abstract: PROBLEM TO BE SOLVED: To stably supply toner to a developing device by quickly eliminating a toner lacking space which may be generated in an intermediate hopper.SOLUTION: There is provided an image forming apparatus which comprises: a toner storage tank; a partition wall for partitioning an inside of the toner storage tank; first and second toner conveyance paths partitioned by the partition wall; a first toner conveyance screw; a second toner conveyance screw; a toner receiving port which is provided on the upstream side of the first toner conveyance path and receives toner to the inside of the toner storage tank; a toner communicating path for communicating the downstream end of the first toner conveyance path and the upstream end of the second toner conveyance path; and a toner discharging port which is provided on the downstream side of the second toner conveyance path and discharges the toner inside the toner storage tank to the outside of the toner storage tank, wherein the partition wall has a plurality intermediate slits for guiding the toner stored in the first toner conveyance path to the second toner conveyance path.
Patent JP-2013158857-A (JP)
Title: Cutting device and cutting method of food
Inventor: KAMURAGI TOSHIHIDE
IPC: B26D3/24
Filed: 2012-02-02
Abstract: PROBLEM TO BE SOLVED: To provide a cutting device of food capable of reliably preventing delamination from occurring even if cheese curd stacked in layers are cut in the stacking direction.SOLUTION: A food cutting device includes slender plate-like cutting blades 20 for cutting cheese curd 2 sandwiching gustatory substances or foods in the interlayer 2A thereof from the lower side to the upper side in the stacking direction, and a takeout member for taking out portion cheese by pressing the inter-slit portions of the cheese curd 2 cut by the cutting blades 20 from the upper side to the lower side in the stacking direction. One end of the cutting blade 20 is attached to the inner peripheral surface of a cylindrical frame 10 and the other end extends radially toward the center axis of the frame 10. The cutting blade 20 is separated from the adjacent cutting blade 20 at a predetermined gap. The cheese curd 2 to which slits are provided by the cutting blades 20 and the center portions of which are joined to each other does not cause peeling since the fitted state of the lower layer side thereof to the upper layer side is maintained. The portion cheese can be taken out without peeling at the interlayer 2A by pressing the cheese curd between the slits by the takeout member downward.
Patent JP-2013161188-A (JP)
Title: Object recognition device
Inventor: NISHIJIMA MASAKAZU
IPC: G06T1/00
Filed: 2012-02-02
Abstract: PROBLEM TO BE SOLVED: To enhance object recognition accuracy using parallax information in an object recognition method based on pattern matching.SOLUTION: An object recognition device 1 includes a stereo camera 17, and a processing device 20 that processes images acquired by the stereo camera. The processing device calculates parallax from the images acquired by the stereo camera, and determines the reliability of an object recognized by pattern matching on the basis of a relation between parallax distribution in a pixel area of the object recognized by pattern matching and parallax distribution in a peripheral pixel area of the pixel area of the object.
Patent JP-2013161634-A (JP)
Title: Electrode housing separator, electrode body, electricity storage device and vehicle
Inventor: TAKAHASHI HIDEKI
IPC: H01M10/04
Filed: 2012-02-03
Abstract: PROBLEM TO BE SOLVED: To provide: an electrode housing separator in which a first sheet face and a second sheet face that are coated with ceramic can be firmly assembled to be fixed; an electrode body; an electricity storage device; and a vehicle.SOLUTION: An electrode housing bag-shaped separator 10 is an electrode integrated separator having a positive electrode sheet 13 inside a separator body 12. The electrode housing bag-shaped separator 10 is also a ceramic separator including a separator sheet 29 coated with ceramic. A plurality of sets of a tongue piece 34 and a slit 36 are formed in the separator sheet 29, and the separator sheet 29 is folded so as to insert the tongue piece 34 into the slit 36, thereby fixing the separator sheet 29 in a bag shape.
Patent JP-2013167371-A (JP)
Title: Reinforcement structure of heat exchanger
Inventor: IKOMA TAKASHI
IPC: F28F9/02
Filed: 2012-02-14
Abstract: PROBLEM TO BE SOLVED: To prevent a crack in a joint of a flattened tube and a header, and smoothly distribute a fluid into the flattened tube.SOLUTION: In a joint to a header 6, a reinforcement member 7 having a curved reinforcement portion 7a of a U-shape is integrally brazed and fixed to the outer periphery of a curved surface 2 of the flattened tube 3.
Patent JP-2013166408-A (JP)
Title: Air conditioning device for vehicle
Inventor: NAGAOKA SHUJI
IPC: B60H1/00
Filed: 2012-02-14
Abstract: PROBLEM TO BE SOLVED: To improve comfort of a rear seat occupant by enabling the supply of conditioning air to a rear seat in as many cases as possible without requiring a dedicated actuator while reducing the cost, and without impairing defroster performance, when supplying conditioning air to the rear seat.SOLUTION: An air conditioning device 1 for a vehicle includes: a defroster passage R4; a vent passage R5; a heat passage R6; and a passage R7 for a rear seat. The air conditioning device for the vehicle also includes: a defroster damper 24 that opens and closes the defroster passage R4; and a damper 57 for the rear seat that opens and closes the passage R7 for the rear seat. The defroster damper 24 and the damper 57 for the rear seat are connected.
Patent JP-2013165766-A (JP)
Title: Cleaning implement
Inventor: ADACHI MASAYUKI
IPC: A47L13/11
Filed: 2012-02-14
Abstract: PROBLEM TO BE SOLVED: To provide a rubber cleaning implement suitable for effectively cleaning fallen hair of a pet.SOLUTION: A cleaning implement A1 includes a body 1 having an elastically deformable housing chamber 10 formed in a hollow shape, wherein at least part of an outer surface of the body 1 is configured as a rubber scraping part 11 and a slit 12 penetrating trough the inside toward the outside is formed in the housing chamber 10.
Patent JP-2013169088-A (JP)
Title: Power converter, dc substation, dc power transmission system and control method of power converter
Inventor: KATO SHUJI
IPC: H02M7/48
Filed: 2012-02-16
Abstract: PROBLEM TO BE SOLVED: To suppress and prevent blowout of a conductor wire and arc generation, by reducing a current flowing from a DC capacitor into an IGBT leg upon short circuit of a semiconductor leg.SOLUTION: In the power converter having an arm configured of one or a plurality of unit converters in cascade connection, the unit converter has a main circuit of chopper configuration where semiconductor legs are connected with a DC capacitor. At least some semiconductor legs have a semiconductor module, and a pressure thyristor is connected in parallel with the DC capacitor. Inductance (LS) of a discharge path from the DC capacitor via the pressure thyristor is small and satisfies the following conditions, so that a current having a current rise rate higher than the current rise rate tolerance of the pressure thyristor can be fed when the pressure thyristor is turned on. LS<DC capacitor rated voltage/current rise rate tolerance of the pressure thyristor.
Patent JP-2013172285-A (JP)
Title: Polarization light level difference adjusting device
Inventor: MEKATA NAOYUKI
IPC: H04J14/04
Filed: 2012-02-21
Abstract: PROBLEM TO BE SOLVED: To make level difference small as much as possible of two orthogonal polarization components at a subsequent stage of an optical transmission module, used in a digital coherent transmission communication system and the like.SOLUTION: Output from an optical transmission module 11 is led to a polarization holding type optical fiber 12 so that two orthogonal polarization components will be maintained. A parallel flat glass 14 is tilted by a prescribed angle relative to an optic axis such that it is rotated around a polarization direction of one of the polarization components. The light which went through the parallel flat glass 14 is led to an optical fiber 16. The level difference of the two orthogonal polarization components can be adjusted by setting the angle of incidence θ corresponding to the level difference of the two orthogonal polarization components.
Patent JP-2013174800-A (JP)
Title: Image forming device
Inventor: MITA TAKURO
IPC: G03G15/20
Filed: 2012-02-27
Abstract: PROBLEM TO BE SOLVED: To reliably determine a case in an image forming device where water droplets are likely to be generated, and to prevent water droplets from being generated on the basis of a determination result.SOLUTION: The image forming device includes: environmental humidity deriving means that derives a degree of environmental humidity in the device as one of indices set in advance in multiple stages in accordance with humidity level; recording material humidity deriving means that derives a degree of humidity of a recording material as one of the indices set in advance in multiple stages, from a type of the recording material to pass, the index derived by the environmental humidity deriving means, and a voltage to be applied to a secondary transfer roller 9 by a transfer bias application circuit part 41 while the recording material exists in a secondary nip part; and control means that controls image forming operation to prevent dew condensation from occurring in the device when the index derived by the recording material humidity deriving means indicates a higher humidity degree than that derived by the environmental humidity deriving means.