baber/WOPTO huggingface dataset:
Patent JP-3240546-U (JP)
Title: 枕
IPC: A47G9/10
Filed: 2022-11-17
Granted: 2023-01-17
Abstract: 【課題】被験者の後頭部を安定的に支持するための枕を提供する。【解決手段】左右対称をなしている枕は、後縁Ｅ１、前縁Ｅ２、右縁Ｅ３、左縁Ｅ４を有し、枕の中心Ｏを含む後頭支持領域１と、右横寝支持領域２と、左横寝支持領域３とによって構成される。後頭支持領域１と右横寝支持領域２とは仕切布（マチ）４－１によって区画され、後頭支持領域１と左横寝支持領域３とは仕切布４－２によって区画されている。仕切布４－１と枕の中心Ｏとの間に仕切布５－１が設けられ、仕切布４－２と枕の中心Ｏとの間に仕切布５－２が設けられている。仕切布５－１、５－２は枕の中心Ｏに対して凹形状をなして対向し、前後方向に開放端Ｓ１、Ｓ２を有し、被験者の頭部を支持するようになっている。仕切布５－１、５－２の高さは各仕切布４－１、４－２の高さより小さい。【選択図】 図１
Patent JP-3241831-U (JP)
Title: 回転体ケージ
IPC: F16G13/02
Filed: 2023-03-07
Granted: 2023-05-09
Abstract: 【課題】回転体をスムーズに転がすことができる回転体ケージを提供する。 【解決手段】チェーンベルト１０と、係合部２０と、係止溝部３０とを備えた回転体ケージ１００において、係合部２０は、首狭部２１と、係合体２２と、２つの当接凸部２３と、位置決め凸部２４を備え、係止溝部３０は、係止溝口３１と、２つの当接部３２と、連接部３３と、ハウジング部を含み、相対する開口側３０Ａと位置決め側３０Ｂを含む。係合部２０は係止溝部３０と対応するように嵌められた後、係合体２２は係止溝口３１に収容され、２つの当接凸部２３は、位置決め側３０Ｂを向いた２つの当接部３２の表面に対応するように当接し、首狭部２１は連接部３３に当接し、位置決め凸部２４はハウジング部に対応するように収容される。 【選択図】図４
Patent JP-3242477-U (JP)
Title: 磁石ケース
IPC: B65D81/113
Filed: 2023-04-21
Granted: 2023-06-20
Abstract: 【課題】ケース本体の内部に十分な強度で磁石を保持できる一方、ケース本体からの磁石の取出しを簡単にすることができる磁石ケースを提供する。【解決手段】磁石ケースは、ケース本体１０と、蓋体２０と、少なくとも１つのリブ３０とを具備する。ケース本体１０は、底板１１、側板１２、及び取出口１３を有し、底板１１から立設される仕切板１４によって、複数の磁石がそれぞれ挿嵌される複数の収納スペースに内部が仕切られる。少なくとも１つのリブ３０は、複数の収納スペースのうちの少なくとも１つの収納スペースにおいて底板１１から突設され、当該少なくとも１つの収納スペースに収納される少なくとも１つの磁石を端部寄りの位置で上から下に押圧したときに、反対端部がシーソー式に下から上に移動するように、少なくとも１つの磁石における底板１１との対向面と当接する。【選択図】図１
Patent JP-3244217-U (JP)
Title: 釣り用の仕掛けパーツ
IPC: A01K93/00
Filed: 2023-08-22
Granted: 2023-10-20
Abstract: 【課題】入水時に浮かびやすくした釣り用の仕掛けパーツを提供する。【解決手段】釣り用の仕掛けパーツは、棒体２と、前記棒体２に被せる筒状のウキゴム３とを備えたからまん棒１であって、前記棒体２に凹部６が設けられており、前記棒体２に前記ウキゴム３を被せることにより、前記ウキゴム３が前記凹部６を覆って空気室を構成する。これにより、入水時に浮かびやすくしたからまん棒１を提供することができる。【選択図】図１
Patent JP-3244352-U (JP)
Title: コイル巻きされた線材の回転繰り出し装置
IPC: B65H49/28
Filed: 2023-08-17
Granted: 2023-10-27
Abstract: 【課題】コイル巻きされた線材を繰り出す場合に、コイルの円周方向にスムーズに線材を繰り出すことができ、繰り出された線材が全く捩れることがなく、更にコイル巻きされた線材のコイルの内径の大小に簡単に対応できる、画期的かつ使用性の極めて優れた、コイル巻きされた線材の回転繰り出し装置を提供する。【解決手段】コイル巻きされた線材の回転繰り出し装置３は、中心部４ａ付近に回転支持部４ｂを備え、地上又は床上に設置される回転支持基台４と、該回転支持基台の回転支持部４ｂに回動自在に嵌合し、回転支持基台４に対し無制限な回転を許容し、コイル巻きされた線材１を装着可能とした回転台５と、該回転台に装着されコイル巻きされた線材１のコイル２ａの内径ｄと概略一致するように半径方向に移動調節可能に構成され、コイル巻きされた線材１のコイル２ａの内径ｄを偏心なく支持可能に構成された内径調節装置６とを備える。【選択図】図６
Patent UA-1034-U (UA)
Title: Massaging device
Filed: 2001-03-22
Abstract: The massaging device with three spherical operating heads is described. The heads are located at the ends of three long holders with the opposite ends of the holders joining together. At least one head has the dimensions different from that of other heads. The massaging device has also he fourth head at the end of the fourth holder attached to the ends of other holders. The holders with the heads generate four operating planes of the device. Each of the operating planes is tangential to the surfaces of three heads intersecting other operating planes in such a way that the imaginary tetrahedral pyramid may be constructed. Each of the operating heads locates inside the trihedral angles of the imaginary pyramid. The point connecting the holders is then located inside the pyramid at the distance of each of the operating planes.
Patent UA-1337-U (UA)
Title: Карданний вал наземних транспортних засобів
Filed: 2001-12-12
Abstract: Карданний вал наземних транспортних засобів має два шарніри з хрестовинами і підшипниками, дві фланець-вилки і рухоме шліцьове з'єднання. Кріплення підшипників шарнірів виконане стопорними кільцями, а між денцем підшипника і торцем шипа хрестовини установлені полімерні шайби з вуглецевонаповненого поліаміду. При цьому радіальне ущільнення підшипників здійснено двома ущільнювальними кромками і конусним переходом шипів у тіло хрестовини, виготовленої зі сталі зниженою прогартовуваності з загартуванням СВЧ. Кріплення карданного вала з агрегатами транспортного засобу виконане у фланцях-вилках через хрестоподібні торцеві шліци, які є одночасно центруючим елементом. Шліцьове з'єднання є шліцьовою втулкою з внутрішніми шліцами і циліндричною зовнішньою поверхнею, робочі поверхні яких покриті антифрикційним полімерним матеріалом. Ущільнення шліцьового з'єднання виконане у вигляді телескопічного захисту з двокромковим ущільненням з поліуретанової композиції, яке працює по покритій полімером циліндричній поверхні втулки.
Patent UA-2156-U (UA)
Title: Хвилеіндуктор для масажера
Filed: 2003-05-19
Abstract: Хвильоіндуктор для масажеру, в якому елемент для для розподілу повітря виконаний складним з полого валу з радіальними каналами і встановленими на ньому золотниковими шайбами, що мають радіальні канали, і зафіксовані штифтами відносно один одного зі зміщенням отворів на необхідний кут, або без зміщення.
Patent UA-4129-U (UA)
Title: Composition of ingredients for balm gel "sustavit-і"
Filed: 2004-01-22
Abstract: The composition of the ingredients for the balm gel comprises carbomer, the essential oil of the tea-tree, the bile, the preserving agent, lidocaine, the water, the extracts of the eucalyptus, the black radish, and the birch buds, glycerol, isopropanol, camphor, polyethylene glycol 40, dimethyl sulfoxide, sodium hydroxide, and the flavor.
Patent UA-4226-U (UA)
Title: A method for producing binding material of phosphogypsum-dihydrate
Filed: 2004-03-17
Abstract: A method for producing binding material of phosphogypsum-dihydrate involves neutralization of phosphogypsum-dihydrate, drying, annealing in gypsum-boiling boiler and milling in the ball mill. Phosphogypsum-dihydrate is neutralized by conditioning thereof in dumps at open air up to reaching the pH value of phosphogypsum-dihydrate of not less than 5.0...5.5 with subsequent mixing phosphogypsum-dihydrate and addition of quick lime or Portland cement at an amount providing after conditionong this mixture with composition of not less than 7 days рН value more than 7.0. While milling the binding material in the ball mill to the composition a water-repelling agent is added at an amount providing obtaining normal density of binding material of not more than 0.5.
Patent UA-5216-U (UA)
Title: Fuel purification filter
Filed: 2004-08-03
Abstract: Filter for purification of fuel contains cover with inlet and outlet openings, housing and filtering element hermetically located in it on both sides, said filtering element forms the cavities for primary fuel and filtrate, and the valve of fuel discharge located in the lower part of the filter. The filter is equipped with bypass and drain valves, e signaling apparatus of the pressure differential located in the cover and connected between them and with cavities for the primary fuel and the filtrate. The filtering element is located in the protective perforated jacket.
Patent UA-11269-U (UA)
Title: Device for determining dimensions of quartz tubes
Filed: 2005-06-17
Abstract: The proposed device for determining dimensions of quartz tubes contains an optical radiation source, a diverging lens, a slit diaphragm, a lens, a photodetector, a video signal processor, a computing unit, a displaying unit, and additionally, a filter installed between the lens and the photodetector.
Patent UA-11352-U (UA)
Title: Device for determining small complex reflection coefficients in a rectangular waveguide
Filed: 2005-06-29
Abstract: The proposed device for determining small complex reflection coefficients in a rectangular waveguide contains a variable-frequency oscillator and a unit for generating signals proportional to the electric field strength, which contains directed couplers connected to the waveguide, a signal comparator connected to the oscillator, a simulator of the dispersion matrix coefficients installed between the directed couplers, and additionally, a simulator of the dispersion matrix coefficients installed in front of the analyzed object.
Patent UA-12085-U (UA)
Title: A mixture for making foam concrete
Inventor: BOLKUN YEVHEN MYKHAILOVYCH
IPC: C04B38/10
Filed: 2005-07-29
Abstract: A mixture for making foam concrete contains cement bonding agent, siliceous component û waste of flotation of flue ash, foam former, foam stabilizer, water. It contains as foam former the aqueous solution of foam former PB-2000, as foam stabilizer û the bone glue, and additionally it contains reloxol as plasticizer .
Patent UA-10057-U (UA)
Title: Method for informing parents on the pupils' state of study process
Inventor: KONDRATIEV VIKTOR YURIIOVYCH
IPC: G06F13/00
Filed: 2005-08-12
Abstract: The method for informing parents of the pupils' study process includes collecting information on the pupils' attendance, progress and behavior, filling registration forms, forming electronic data pocket, monitoring the pocket authenticity, entering information to the data base, forming the texts of electronic letters and SMS-messages, and address delivery in frame of information system, codifying the data pocket.
Patent UA-17820-U (UA)
Title: Process of control of underground gas-holder operation
Inventor: VECHERIK ROMAN LEONIDOVYCH
IPC: F17D1/07
Filed: 2006-04-12
Abstract: Process of control of gas-holder operation is performed through regulation of duration of neutral periods between seasons of extraction and pump-in of gas, bringing into operation in first turn at initial stages of p[ump=in-extraction of wells with specific placement, with making and keeping to modes of operation of underground gas-holder providing optimal rate of gas pump-in. By the results of analysis of operation of field system, dynamics of stratal pressure one determines the section of the underground gas-holder where at pumping-in gas to strata one takes out of operation the operation-pump-in wells placed most closely to the boundary of fields with different gas dynamics. At that at the initial stage of gas extraction from gas-holder those wells are put into operation first, and at small day volumes of extraction, operation of gas-holder is provided by operation-pump-in wells placed most closely to tectonic boundary of fields with different gas dynamics.
Patent UA-17830-U (UA)
Title: Cartridge for fire-arms
Inventor: SHEIKO VOLODYMYR OLEKSANDROVYC
IPC: F42B5/00
Filed: 2006-04-17
Abstract: A cartridge for fire-arms has a shell with closed and opened sections, a primer-trigger, a missile and a striking element. For prevention of fatal action on human body the striking element is made of springy material. To the outer surface of the striking element metal coating is applied, and inside the said striking element cavity is provided.
Patent UA-21471-U (UA)
Title: Hydraulic drive of jaws of clam-type loader
Inventor: LOVEIKIN VIACHESLAV SERHIIOVYC
IPC: B66C3/00
Filed: 2006-10-03
Abstract: A hydraulic drive of the jaws of clam-type loader contains a hydraulic tank, a hydraulic pump, hydraulic distributors, hydraulic cylinders, hydraulic lines, a two-position safety valve, a hydro-accumulator, a check valve, an adjustable choke.
Patent UA-23759-U (UA)
Title: Device for dividing rolled bars into measured billets by shift cutting
Inventor: KARNAUKH SERHII HRYHOROVYCH
IPC: B23D23/00
Filed: 2006-12-25
Abstract: A device for dividing rolled bars into measured billets by shift cutting, in which the drive of slider is made as a wedge-hinged mechanism, which consists of a wedge with concave profile located with possibility of reciprocating motion, a hinge, which, from one side, contacts over curved surface of radius R with the wedge, and, from other side - over curved surface of radius r with the slider. In the opening of stone and in the slide bearings of the plates of housing the bushing cutters are mounted, which are made as two eccentric cylinders, rotational axes of which are displaced relative to each other for eccentricity value e and are mounted with possibility of rotary motion to the opposite sides.
Patent UA-27881-U (UA)
Title: Method for preparation of nutrient medium for leptospores cultivation
Inventor: KONDRATENKO VIKTOR MYKOLAIOVYC
IPC: A61K39/00
Filed: 2007-01-17
Abstract: A method for preparation of nutrient medium for leptospores cultivation comprises the mixing of sterile phosphatic buffer solution and sterile native rabbit serum. Obtained mixture of boiled and filtered unsterile buffer phosphatic solution and unsterile inactivated native rabbit serum is centrifugated and filtered through the sterilizing membranes with the pores diameter no more than 0.22 mum.
Patent UA-23226-U (UA)
Title: Walking-stick
Inventor: YASCHUK TARAS MYKOLAIIOVYCH
IPC: A45B9/00
Filed: 2007-01-17
Abstract: A walking-stick relates to subjects of personal use of persons with rickety walk and handicapped persons and can be used in clinics and everyday life.
Patent UA-26231-U (UA)
Title: Valve for pressure control
Inventor: ZHURA PETRO VIKTOROVYCH
IPC: B60T15/00
Filed: 2007-05-03
Abstract: A valve for air pressure control has a body with adjusting clevis eye, inner ling axial channel, side channels for air bleeding, those together with spool that moves in axial channel by inner chain in gaskets form section of air flow redistribution. At that gaskets and intermediate spacer bushings are installed in operating condition on lug of longchannel of the body by means of fixation unit. The spool is assembled of connected to each other inner and outer parts. The inner part placed in section of air redistribution is arranged with long connecting grooves. Fixation unit is arranged as adjusting tightening hollow nut interacting with the body and outer part of the spool. Inner part of the spool is made mostly of uniform plastic material, for instance polystyrene.
Patent UA-27035-U (UA)
Title: 2,5-diethyl-3,4-dihydro-2h-pyran-2-methanol as intermediary product for the synthesis of pyran derivatives
Inventor: KARPIAK NATALIIA MYRONIVNA
IPC: C07D309/20
Filed: 2007-06-19
Abstract: 2,5-diethyl-3,4-dihydro-2H-pyran-2-methanol of the formula as intermediary product for the synthesis of pyran derivatives.
Patent UA-28362-U (UA)
Title: Method of repairing components
Inventor: YABLOKOV VOLODYMYR VASYLIOVYCH
IPC: B23K9/00
Filed: 2007-07-02
Abstract: A method of repairing the components, at which the cavity of damage inside the component is closed by cover plate, cover plate is welded to the external surface of component with the help of welding. For improvement of the level of restoration of protective properties and air tightness of component in the area of its damage prior to closing the cavity of damage inside the component by cover plate the cavity of damage inside the component is filled with mixture from ceramic balls and polymeric sealing compound with the help of processing means.
Patent UA-29253-U (UA)
Title: Smoke fire optical signal device
Inventor: SOROKOPUD OLEKSII SEMENOVYCH
IPC: G08B17/10
Filed: 2007-08-13
Abstract: Fire smoke optical signaling device has smoke chamber with body and cover inside which at angle one to another are installed source of directed light as infrared radiator and receiver of catered light that are optically insulated one from another with partition that has shield directed to side of radiator and mirror reflector placed in front of radiator, this has two reflecting surfaces that intersect one with another at angle not larger than 180°. To increase sensitivity to smoke mirror reflector is installed in such way that radiation flux reflected from another reflecting surface crosses smoke chamber in zone of placement of receiver. Partition has additional screen directed to side of receiver of scattered light. Source and receiver of scattered light are installed I holders that have slants for better smoke penetration. At inner surface of cover in circle slot-like openings are provided.
Patent UA-30810-U (UA)
Title: Method of grinding of surfaces of components
Inventor: PROVOLOTSKYI OLEKSANDR YEVDOKYMOVYCH
IPC: B24B37/00
Filed: 2007-11-28
Abstract: A method of grinding of the surfaces of components includes chip removal by abrasive grains of grinding wheel. Simultaneously with removal of the material, which is processed at specified depth of cutting by grinding wheel, treatment is performed by hydroabrasive jet suspension, which is supplied into the area of contact of the wheel of 5-12 structure with workable surface increasing granularity and quantity of grains in the suspension with increase of the structure of grinding wheel.
Patent UA-31552-U (UA)
Title: Method for mass laboratory growing of populations of earwig (forficula auricularia l.)
Inventor: KOCHERHA MARYNA OLEKSANDRIVNA
IPC: A01K67/00
Filed: 2007-12-19
Abstract: A method for mass laboratory growing of populations of the earwig (Forficula auricularia L.) includes collecting thereof from nature conditions and growing on natural meal. Highly viable starting earwig populations selected from virgin biocenoses are grown in the laboratory conditions in wooden rearing cages of 50х50х50 cm in sizes, with a metal bottom, along the surface of which a soil layer of 5-7 cm in thickness with vegetable remains are arranged. The protein meal as pieces of chicken and beef meat is distributed into wooden tubes without core of 7-8 cm in length on the basis of 3-5 g. Carbohydrate meal as pieces of refined sugar or crystalline honey are disposed into the tubes by 2-3 g per tube.
Patent UA-31971-U (UA)
Title: Method for electro-thermal processing of wastes to methanol
Inventor: BOICHENKO SERHII VALERIIOVYCH
IPC: F23G5/08
Filed: 2007-12-27
Abstract: A method for electro-chemical processing of wastes to methanol by closer-cycle displacement of wastes being treated. Besides that hydrocarbon raw material, wastes from agricultural, forestry, domestic economies and industrial enterprises are subjected to the effect of electric discharge by which it is converted without access of atmospheric air to synthesis-gas that at iron catalyst is transformed to methanol and after end of gasification electric discharge is removed, at that inorganic slags are melted and removed.
Patent UA-33804-U (UA)
Title: Device for measurement of parameters of high-ohmic objects
Inventor: SKRYPNYK YURII OLEKSIIOVYCH
IPC: G01R27/00
Filed: 2008-03-13
Abstract: Device for measurement of parameters of high-ohmic objects that has two input sockets connected to low-ohmic magazine of resistors through two connected in sequence low-ohmic resistors, automated key placed I parallel to low-ohmic resistors, high frequency amplifier, band filter, integrator to output of which are connected selective low frequency amplifier, synchronous detector, low frequency filter and indicator, connected in series, low frequency generator output of which is connected to control input of synchronous detector and control output of automated switch. To the device are included digital millivoltmeter, balance mixer and additional high frequency amplifier input of which together with input of high frequency amplifier is connected to middle point of connection of two low-ohmic resistors, input of high frequency amplifier is connected to one of the inputs of balance mixer second input of which through band filter is connected to output of additional high frequency amplifier and output is connected to input of integrator to output of which digital millivoltmeter is directly connected.
Patent UA-35977-U (UA)
Title: Centrifugal cone device for surface application of solid mineral fertilizers
Inventor: DYTIUK ANATOLII IVANOVYCH
IPC: A01C15/00
Filed: 2008-05-06
Abstract: A centrifugal cone device for surface application of solid mineral fertilizers includes a rod conveyer, a regulating shutter from double-acting hydraulic cylinder, two cone centrifugal working elements and a fertilizer guide device arranged under the conveyer. Each working element consists of three scattering disks, differing by diameters thereof, fixed on the vertical shaft with a drive from a hydromotor through a V-belt transmission. The fertilizer guide device consists of six autonomous trays which have an elliptic shape of transversal cross section thereof, differing by length thereof, attached at an angle.
Patent UA-38546-U (UA)
Title: Installation for the preparation of emulsion
Inventor: VARSHAVSKYI YULII IOHANOVYCH
IPC: F04B13/00
Filed: 2008-07-28
Abstract: An installation for the preparation of emulsion has a system of water treatment arranged as filter and reduction valve with manometer connected to each other, stationary tank for emulsol, pump-dozer arranged with inlet for water, input for emulsol and output for emulsion. At that system of water preparation is connected to input of pump-dozer for water and stationary tank for emulsol is connected to input of pump-dozer for emulsol. Installation is additionally equipped with pump for connection to replaceable container with emulsol output of which is connected to stationary tank for emulsol, at that stationary tank for emulsol is equipped with indicator of level of emulsol.
Patent UA-38910-U (UA)
Title: Multispectral tv pyrometer
Inventor: PORIEV VOLODYMYR ANDRIIOVYCH
IPC: H04N7/00
Filed: 2008-08-04
Abstract: The invention proposes a multispectral TV pyrometer, wherein an image forming apparatus comprises a motor, a control system and a polygonal prism, which is optically connected with an object-glass, a back focal plane of which is united with a sensitive plane of a light-electric converter.
Patent UA-41738-U (UA)
Title: Packaging material with package integrity indicator
Inventor: MADATOV ARTEM VALERIIOVYCH
IPC: B65D65/00
Filed: 2008-11-21
Abstract: A packaging material with package integrity indicator is made in the form of an elastic packaging film. On the external surface of packaging a thin-walled indicative layer of elastic material film is applied without adhesion, which has higher elasticity and another color than the material of packaging film.
Patent UA-41633-U (UA)
Title: Method for preventing and treating vascular pathology in mild and moderate gestosis in pregnant patients
Inventor: YAVORSKYI PAVLO VATSLAVOVYCH
IPC: A61K31/00
Filed: 2009-02-16
Abstract: A method for preventing and treating the vascular pathology in mild and moderate gestosis in the pregnant patients provides for the use of the drugs in combination with laser therapy. When early signs of the vascular pathology are evident, Dipiridamol is used at a dose of 50 mg thrice a day one hour prior to the meals; Glutargin is used at a dose of 0.75 mg thrice a day for 14 days. The areas of the projection of the great occipital foramen and the alveolar area are exposed daily to infrared low intensity laser for 3-4 min at a wavelength of 0.9 μm and the output of 100 mW. The areas of the elbow are exposed to laser radiation for 3 min at a wavelength of 630 nm and the output of 20 mW with the energy dose applied of 1.0 J/cm.
Patent UA-44152-U (UA)
Title: Method for diagnostics of connective tissue displasia in patients with the first diagnosed infiltrative pulmonary tuberculosis
Inventor: SUHANOVA LIDIA ANATOLIIVNA
IPC: A61B6/00
Filed: 2009-03-16
Abstract: A method for diagnostics of connective tissue displasia in patients with the first diagnosed infiltrative pulmonary tuberculosis is carried out with the performing of roentgenologic examination. Additionally the determination of presence of connective tissue displasia phenotypical signs and computer tomography of lungs are carried out, the coefficient of lung area diminishing (KDLA) is determined as ratio of longitudinal and transversal size of separate cuts of right lung to the analogical sizes of the left lung, a longitudinal size is determined, since the more distal points of front and back limits of lungs parallell to the midline, a transversal size is determined at the level of middle longitudinal - as a perpendicular to it from the more distal limit of lungs to the midline without the account of mediastinum size, and at the right lung diminishing the value of KDLA is less than 0.9, and the left lung - more than 1.1.
Patent UA-44008-U (UA)
Title: Method for making bimetal helically finned tube
Inventor: RUDENKO OLEKSANDR IHOREVYCH
IPC: F28F1/12
Filed: 2009-04-30
Abstract: A method for making bimetal helically finned tube includes preliminary mechanical treatment of outer surface of bearing tube and cross-screw rolling of fins. Preliminary mechanical treatment is carried out through application of screw groove at outer surface of the bearing tube. Pitch of screw groove is set as equal to fin spacing, and fin rolling is carried out in such way that spaces between the fins are over against the groove.