baber/WOPTO huggingface dataset:
Patent JP-2001507747-A (JP)
Title: 熱可塑性成形用材料
IPC: C08L25/06
Filed: 1997-12-19
Abstract: (57)【要約】
（Ａ）５から９５重量％の、シンジオタクチック構造を有するビニル芳香族重合体、および（Ｂ）５から９５重量％の、ビニル芳香族単量体と、芳香族環上に炭素原子数２２までのアルキルにより置換されていてもよい１，１−ジフェニルエチレンまたはその誘導体との共重合体を含有する熱可塑性成形用材料。
Patent JP-2000508360-A (JP)
Title: フッ素含有グラフト共重合体およびその製造方法
IPC: C09K3/18
Filed: 1996-07-26
Abstract: (57)【要約】
本発明は、フッ素含有グラフト共重合体およびその製法に関する。特に、それぞれ、主鎖としての共重合可能なパーフルオロアルキル化合物および一端に共重合可能なビニル基を持つ分枝鎖としてのマクロモノマーの共重合によって合成されたフッ素含有グラフト共重合体である。それゆえ、グラフト共重合体は、種々のタイプのフツ素含有化合物の表面変性剤として使用されるとき（例えば、撥水剤および撥油剤、汚物解離剤、離型剤、等）、ランダム共重合体に比して、表面変性のためにデザインされた基体に対しての特筆すべき親和住およびすぐれた能力を持っている。
Patent JP-H11510639-A (JP)
Title: 簡略陽極を具備した側方エミッタ電界放出デバイスおよびその製造法
IPC: H01J9/02
Filed: 1996-05-31
Abstract: (57)【要約】
側方電界放出デバイス（１０）は、基板（２０）にほぼ平行な側方エミッタ（１００）と簡素化された陽極構造（７０）とを有する。陽極の上表面は側方エミッタの面から正確に間隔を置いて離されており、適切なバイアス電圧が供給された際に電界放出によって側方エミッタ陰極のエッジから放出される電子を受け取る。このデバイスは、ダイオードとしても、または三極管、四極管等制御電極（１４０）を有し、この制御電極に供給された電気信号でエミッタから陽極への電流を制御する事が出来るようにに配置されているものとして構成することも可能である。
Patent JP-2000508860-A (JP)
Title: 薄膜エレクトレットマイクロフォン
IPC: H04R31/00
Filed: 1997-04-18
Abstract: (57)【要約】
少なくともその一方が支持構造の上に形成されたマイクロ加工エレクトレット層（６）を含む、マイクロホン膜ユニット（３０）とマイクロホン裏板（３２）とを近接配置することによって、高度に信頼性のある、安価なマイクロホンを生産することから成るエレクトレットマイクロホン製作方法。熱的アニーリングを使って注入電荷を安定させる。
Patent JP-2001513297-A (JP)
IPC: H04L12/42
Filed: 1998-02-06
Abstract: A method and apparatus for conferencing two or mores calls in an expandable telecommunications system. The system may include a plurality of nodes connected by an inter-nodal network such that the nodes communicate with each other by exchanging variable-length packets of information. At least one node in the system contains digital signal processing circuitry capable of conferencing the voice information from three or more callers interfaced with the system. Packets containing voice information from each conference participant are preferably transmitted via the inter-nodal network to the node having the requisite digital signal processing circuitry. This node performs a conferencing function on that information, packets the resulting conferenced information and transmits those packets via the inter-nodal network to the nodes interfaced with the conference participants.
Patent JP-2001513799-A (JP)
Title: ｔ−ブチルペルオキシ−シクロドデシル−オキサレート
IPC: C07C409/38
Filed: 1998-03-04
Abstract: (57)【要約】
新規の化合物であるｔ−ブチルペルオキシ−シクロドデシル−オキサレートならびにその製造方法および重合開始剤としての使用を記載する。
Patent JP-2000509059-A (JP)
Title: 殺菌剤混合物
IPC: A01N47/24
Filed: 1997-04-23
Abstract: (57)【要約】
ａ）式Ｉ
 で表され、式中ＴがＣＨまたはＮを、ｎが０、１または２を意味し、Ｒがハロゲン、Ｃ 1 −Ｃ 4 アルキルまたはＣ 1 −Ｃ 4 ハロアルキルを意味し、ｎが２の場合、Ｒがそれぞれ異なってもよいカルバマート、および／または、ｂ）下式ＩＩ
 で表され、式中Ｘが酸素またはアミノ（ＮＨ）を、ＹがＣＨまたはＮを、Ｚが酸素、硫黄、アミノ（ＮＨ）またはＣ 1 −Ｃ 4 アルキルアミノ（Ｎ−Ｃ 1 −Ｃ 4 アルキル）を、Ｒ’がＣ 1 −Ｃ 6 アルキル、Ｃ 1 −Ｃ 6 ハロアルキル、Ｃ 3 −Ｃ 6 アルケニル、Ｃ 2 −Ｃ 6 ハロアルケニル、Ｃ 3 −Ｃ 6 アルキニル、Ｃ 3 −Ｃ 6 ハロアルキニル、Ｃ 3 −Ｃ 6 シクロアルキルメチル、または部分的または完全にハロゲン化されてもよく、および／または１〜３個の以下の基、すなわちシアノ、Ｃ 1 −Ｃ 4 アルキル、Ｃ 1 −Ｃ 4 ハロアルキル、Ｃ 1 −Ｃ 4 アルコキシ、Ｃ 1 −Ｃ 4 ハロアルコキシ、Ｃ 1 −Ｃ 4 アルキルチオを有してもよいベンジルを意味するオキシムエーテル、およびｃ）化合物ＩＩＩ．ａ〜ＩＩＩ．ｄ
 から選択される殺ダニ剤、を、相乗活性量で含むことを特徴とする殺菌剤混合物。
Patent JP-2001514640-A (JP)
IPC: C07D471/04
Filed: 1998-03-03
Abstract: PCT No. PCT/EP98/01168 Sec. 371 Date Aug. 30, 1999 Sec. 102(e) Date Aug. 30, 1999 PCT Filed Mar. 3, 1998 PCT Pub. No. WO98/40382 PCT Pub. Date Sep. 17, 1998Compounds of formula (I) in which R4 is a phenyl radical substituted by R5, where R5 is a tetrazole-5-yl-radical optionally substituted by a radical R6, are novel efficacious PDE3/4 inhibitiors.
Patent JP-2002513497-A (JP)
Title: 磁気抵抗読取りセンサーの改良および磁気抵抗読取りセンサーの製造方法
IPC: G11B5/39
Filed: 1998-01-07
Abstract: (57)【要約】
フィルムの取除きを排除した、改良された磁気抵抗読取りセンサー１００および磁気抵抗読取りセンサー１００の製造方法が開示されている。その上に続く層により３領域に分けられるギャップ層１０４上に、第一マスク１２８を配置することにより、磁気抵抗読取りセンサー１００が形成される。第一マスク１２８はギャップ層１０４の中央領域に配置され、また第一硬バイアス材１０６が、ギャップ層１０４の外側領域上に設けられる。第一マスク１２８は除去され、磁気抵抗素子１１６が硬バイアス材１０６とギャップ層１０４の中央領域の外側領域上に設けられる。それによって、磁気抵抗センサー１００の能動領域１２２、第一不動領域１２４、第二不動領域１２６が形成される。スペーサー層１１８が全３領域内の磁気抵抗素子１１６上に設けられ、また軟隣接層１２０が全３領域内のスペーサー層１１８上に設けられる。第二マスク１３４がセンサーの能動領域１２２を覆うように配置され、また第二硬バイアス材１１０が、第一不動領域１２４内および第二不動領域１２６内の軟隣接層１２０上に設けられている。第二マスク１３４は取外され、接点１１２，１１４が第二硬バイアス材１１０上に配置されている。
Patent JP-2001516305-A (JP)
Title: ラダーのステアリング作用高進装置
IPC: B63H25/52
Filed: 1998-03-19
Abstract: (57)【要約】
ポンプからラダー（５）のダクト（１１）に海水を供給する少なくとも１つの通路と、ダクトと連通しかつ供給される海水をラダーの表面で放出するように構成された手段（２０）とを備えた船のラダーのステアリング作用を高める装置。前記手段は、ラダー（５）の先頭部において好ましくは垂直に延びるとともに、ラダーの中心面に対して両側の末端位置まで略垂直な軸線を中心に回動するプロファイル素子（２０）を備えている。更に、プロファイル素子（２０）と連係する分配ダクト（１２Ａ、１２Ｂ）が、プロファイル素子がラダーの角度偏位に対する逆の方向変換動作により海水を前記角度偏位において後方を向くラダーの表面（５Ｂ）に沿って放出する（１２Ｘ）ことができるように調整自在に配設されている。
Patent JP-2000512091-A (JP)
Title: 動作ベクトル処理
IPC: H04N7/32
Filed: 1997-05-14
Abstract: (57)【要約】
出力動作べクトル（ＭＶ’）を与える方法において、動作ベクトル（ＭＶ）がエンコードされた画像信号（ＭＰＥＧ）から取得され、取得された動作ベクトル（ＭＶ）が後処理され、出力動作ベクトル（ＭＶ’）が得られる。後処理は、候補動作ベクトルの発生（ＣＶＧ）、並びに、候補動作ベクトル及び取得された動作べクトル（ＭＶ）に基づく出力動作ベクトル（ＭＶ’）の選択（ＣＶＳ）を含む。
Patent JP-2000511538-A (JP)
Title: 鎮咳剤としてのｇａｂａ取り込み阻害剤の使用
IPC: A61P11/14
Filed: 1997-05-23
Abstract: (57)【要約】
本発明は、ヒトを含む哺乳動物における咳嗽を治療する方法であって、かかる哺乳動物に有効量のＧＡＢＡ取り込みの阻害剤を投与することを含む方法である。
Patent JP-2002509445-A (JP)
Title: 新規化合物
IPC: C12R1/645
Filed: 1999-05-21
Abstract: (57)【要約】
この発明は、糖新生に対する阻害活性を有する新規生物活性化合物ＷＦ１９３５３物質を提供するものであり、また、栄養培地内でＨｅｌｉｃｏｍｙｃｅｓ属に属するＮｏ．１９３５３物質生産菌株を発酵し、ＷＦ１９３５３物質を回収することからなるＷＦ１９３５３物質の製造方法を提供する。さらに、この発明は、ＷＦ１９３５３物質および担体を含有する医薬組成物、ＷＦ１９３５３物質の医薬としての用途、ならびに、ＷＦ１９３５３物質の、ヒトまたは動物における糖尿病または肥満症を治療または予防するための医薬の製造への使用を提供する。
Patent JP-2002507191-A (JP)
Title: 痛覚脱失の生成または神経保護のためのコナントキンの使用
IPC: A61K48/00
Filed: 1998-04-24
Abstract: (57)【要約】
哺乳動物において痛覚脱失を生成するためまたは神経保護のための方法であって、この方法は治療的に有効な量のコナントキンを哺乳動物に投与する工程を含む。
Patent JP-2001522248-A (JP)
IPC: C07K14/245
Filed: 1998-05-01
Abstract: The present invention relates to nucleic acid molecules derived from; a gene encoding a transferase; or a gene encoding an enzyme for the transport or processing of a a polysaccharide or oligosaccharide unit, including a  wzx  gene or a wzy gene, or a gene with a similar function; the gene being involved in the synthesis of a particular bacterial polysaccharide antigen, wherein the sequence of the nucleic acid molecule is specific to the particular bacterial polysaccharide antigen. Polysaccharides to which the invention relates include O antigens. The invention also relates to methods of testing samples for the presence of one or more bacterial polysaccharide antigens, using the nucleic acid molecules of the invention, and to kits containing the nucleic acid molecules of the invention.
Patent JP-2002500644-A (JP)
Title: 子宮内化学的壊死化の方法、組成物、および装置
IPC: A61K33/14
Filed: 1998-05-11
Abstract: (57)【要約】
腐食性組織壊死組成物、例えば、硝酸銀およびデキストランのペーストを、壊死させるべき組織に送達し、前記ペーストを標的組織と十分に時間の間接触させて、組織の内層の実質的にすべてを化学的に壊死させ、次いで前記腐食性組成物を不活性化剤、例えば、水性塩化ナトリウム溶液と接触させ、これにより前記腐食性組成物を非腐食性とし、次いで腔をすすぐことによって、哺乳動物の体腔の組織の内層、例えば、子宮内膜を化学的に壊死させる方法および組成物。薬剤を送達する組成物および方法も開示される。
Patent MD-20030093-A (MD)
Title: Bath for paraffin impregnation and dehydration of vegetal objects for light microscopy
Inventor: CIUBOTARU ALEXANDRU
IPC: G01N1/30
Filed: 2003-04-02
Abstract: The bath for paraffin impregnation and dehydration of biological objects is meant for light microscopy of a large number of tested objects, in the process of preparation thereof for microtome cutting.The bath contains an aluminum block of 90 cells, forming the cover of a dish filled up with water, heated by two electric elements joined with two temperature controllers, and a control desk. Into the cells there are introduced the vegetal objects which are dehydrated with ethyl alcohol and by xylol or toluol are impregnated with paraffin.
Patent MD-20070286-A (MD)
Title: Method for manufacturing a discharge identification plant for production of identification tags
Inventor: SCHILIOV VLADIMIR
IPC: G06K1/00
Filed: 2007-10-26
Abstract: The invention relates to the field of information technologies and is meant for identification of material resources, firstly for identification of metal articles. The special feature of the proposed method consists in that the current-conducting disperse powder, before feeding into the interelectrode space, is formed by mixing between them of fractions different by content and dimensions, and feeding of the mixture is carried out dosatedly through a hollow high-voltage electrode.
Patent MX-160648-A (MX)
Inventor: INVERNIZZI RENZO
IPC: C08F4/64
Filed: 1982-05-17
Abstract: A process for the preparation of a catalyst which is highly active in the polymerization of gaseous ethylene is described the process comprising the steps of spray drying an ethanolic solution of MgCl2 to obtain MgCl2 particles of from 3 to 100 microns in size and with a residual alcoholic OH-groups content of from 1.5% to 20% by wt., the MgCl2 in said particles having an X-ray spectrum with a maximum peak at 10.8 angstrom, reacting said particles with a titanium halide in liquid or vapor phase and mixing the obtained reaction product with an alkylaluminium or an alkylaluminium halide in such amount to obtain an atomic ratio Al:Ti of from 100:1 to 5,000:1
Patent NZ-206078-A (NZ)
Title: Paper-making press felt
Inventor: LILJA R E
IPC: D21F7/10
Filed: 1983-10-27
Abstract: A felt (1) for use in the press section of papermaking machines. The felt (1) consists of a woven base (7) preferably of two layers of threads extending in the machine direction of the felt and cross-machine direction threads interconnect the machine-direction threads. The woven base having a batt (11) needled onto at least one of its faces. The felt is manufactured to be installed in flat form but after its installation in the machine its ends are joined together to form an endless cloth with the aid of a seam (8, 9, 10) known per se. A flap (11a) of the ban or batts is arranged to cover the seam area. 
<??>The invention also concerns a method of manufacturing and installing the felt in the press section of papermaking machines.
Patent NZ-208428-A (NZ)
Title: Video encryption by selective line inversion
Inventor: ROBBINS C N
IPC: H04N7/00
Filed: 1984-06-08
Abstract: An encrypted video distribution system includes a signal- originating head end for scrambling outgoing television program-bearing signals. In particular, the video content of selected lines is inverted about a reference voltage level, and the inversion reference level amplitude transmitted in pulse form during the horizontal synchronizing pulse interval. Line video inversion/non-inversion is controlled by a keyed pseudo random generator.At each authorized subscriber location, all inverted lines are restored to proper format, using the accompanying received inversion amplitude level present during horizontal sync as a reference. A pseudo random generator is included in the receiver descrambling circuitry and operates in a sequence identical to the like circuit atthe head end to identify those lines requiring video inversion.
Patent NZ-212598-A (NZ)
Title: Window stay with friction pivot joints at pivotal connections and mountings and a control arm connected from lower arm to first of two upper arms from intermediate their ends
Inventor: DAVIS RONALD PERCIVAL
IPC: E05D15/40
Filed: 1985-06-28
Abstract: An enlarged opening angle window stay for use in mounting a window sash to a window frame, comprising a lower arm adapted to be pivotally mounted to the frame of a window at its proximal end and to the sash of the window at its distal end, a first upper arm adapted to be pivotally mounted at its proximal end to the frame of the window at a point spaced from the mounting of the distal end of the said lower arm, a second upper arm pivotally connected at its proximal end to the distal end of the said first upper arm and adapted to be pivotally mounted at its distal end to the said window sash at a point spaced from the mounting of the distal end of the said lower arm, and an intermediate control arm extending between the said lower arm and the said first upper arm and pivotally connected to said lower arm and said first upper arm at a point spaced from the ends thereof and arranged to direct movement of said first upper arm during opening and closing of the stay.
Patent NZ-214845-A (NZ)
Title: Retreading a radial tyre with replacement of outer belt plies
Inventor: LACY F A
IPC: B29D30/52
Filed: 1986-01-16
Abstract: This invention is directed to the retreading of steel belted radial tires by removing and replacing more than the protector ply. Initially, the tire is inspected to determine if it is retreadable. The tire is then buffed so that the protector ply will be located and removed. The first working belt is then located and removed. A steel belt incapulated in uncured rubber will be placed on the tire. Then wedge stock will be applied, isolating the replacement belt. A second replacement belt will be applied for the protector ply with the steel cords going in the opposite direction of the first replacement belt applied. Precured tread rubber will be applied to the casing surface in the usual manner. The assembly is then covered by an envelope and a metal curing band will be applied to the outer surface. The assembly will then be mounted on curing rims and cured in commercially available equipment.
Patent NZ-229579-A (NZ)
Title: Screw cap with annular sealing rib on inner surface
Inventor: DRUITT RODNEY MALCOLM
IPC: B65D51/16
Filed: 1989-06-15
Abstract: PCT No. PCT/AU89/00256 Sec. 371 Date Mar. 14, 1991 Sec. 102(e) Date Mar. 14, 1991 PCT Filed Jun. 15, 1989 PCT Pub. No. WO89/12584 PCT Pub. Date Dec. 28, 1989.A one piece plastic closure for a container having an externally screw threaded neck, the closure comprising a top portion and an internally threaded skirt. The closure has an annular sealing rib which projects downwardly from the underside of the top portion. The rib includes a first, substantially cylindrical, portion contiguous with the underside of the top portion and lying adjacent or abutting to the skirt and a second, frusto-conical, portion contiguous with the end of the first portion distal to the underside of the top portion and extending radially inwardly to terminate in a circular free edge, such that during threaded engagement of the cap with the neck, the second, frusto-conical, portion will be engaged by a free end of the neck and folded back against the first, substantially cylindrical portion of the rib to form a gas-tight seal between the neck of the container and the closure.
Patent NZ-230816-A (NZ)
Title: Gamma interferon, treatment of vascular stenosis
Inventor: HANSSON GORAN
IPC: A61P9/10
Filed: 1989-09-28
Abstract: The present invention relates to the use of gamma-interferon for the preparation of a pharmaceutical preparation for the treatment of vascular stenosis caused by e.g. intimal hyperplasia, including the treatment of restenosis following treatment of arterial stenosis or occlusion. In a preferred embodiment the present invention relates to the use of gamma-interferon for the treatment of arterial stenosis following vascular surgery and/or angioplasty.
Patent NZ-243606-A (NZ)
Title: Buffered hydrogen peroxide solution containing surfactant to improve killing efficacy; use to disinfect contact lenses
Inventor: WINTERTON LYNN C
IPC: A01N59/00
Filed: 1992-07-17
Abstract: The efficacy of buffered H2O2 disinfecting formulations for contact lenses is improved by incorporating into such formulations a surface active agent.
Patent NZ-247993-A (NZ)
Title: Iminoquinoline derivatives and pharmaceutical compositions
Inventor: BILLHARDT-TROUGHTON UTA-MARIA
IPC: C07D401/12
Filed: 1993-06-25
Abstract: Compounds of the formula I <IMAGE>  and their tautomeric forms, of the general formula Ia <IMAGE>  Ib and Ic <IMAGE> in which the substituents R<1>-R<4> and X and Y have the meanings mentioned, have an antiviral activity.
Patent NZ-281084-A (NZ)
Title: Dry mixtures for producing colour-stable liquid compositions when combined with water that contains free chlorine
Inventor: SMITH WILLIAM J
IPC: A23L1/275
Filed: 1995-02-07
Abstract: The present invention relates to a dry mixture which provides a color-stable liquid composition when combined with free chlorine-containing water, said dry mixture comprising: (a) from about 0.005% to about 0.035% by weight chlorine reactive agent; (b) from about 0.5% to about 5.0% by weight electrolyte; (c) coloring agent, wherein the dry mixture comprises sufficient coloring agent to provide for a concentration of coloring agent in the range of from about 5 ppm to about 200 ppm in a color-stable liquid composition prepared from said dry mixture; and (d) a balance of carbohydrate. The present invention also relates to a method of preparing a color-stable liquid composition, said method comprising: (a) preparing a dry mixture comprising: (1) from about 0.005% to about 0.035% by weight chlorine reactive agent; (2) from about 0.5% to about 5.0% by weight electrolyte; (3) coloring agent, wherein the dry mixture comprises sufficient coloring agent to provide for a concentration of coloring agent in the range of from about 5 ppm to about 200 ppm in the color-stable liquid composition; and (4) a balance of carbohydrate; and (b) combining said dry mixture with free chlorine-containing water, thereby producing a color-stable liquid composition; wherein the weight ratio of water combined with dry mixture is in the range of from about 10.5:1 to about 22:1 (water:dry mixture), wherein the molar ratio of chlorine reactive agent contained in the dry mixture to free chlorine contained in the water is at least about 2.2:1 (chlorine reactive agent:free chlorine), and wherein the color-stable liquid composition comprises from about 5 ppm to about 200 ppm coloring agent.
Patent NZ-323351-A (NZ)
Title: Method and apparatus for determining the fertility status of women using the subjects eccrine sweat ph
Inventor: MARETT DOUGLAS M
IPC: A61B10/00
Filed: 1996-12-11
Abstract: A method and apparatus for predicting the fertility status of a human female subject. The onset of menstruation of the subject is noted. Daily determinations are made of the subjects eccrine sweat pH, beginning not more than 4 days following menstruation. The start of the fertile period is determined as a function of a significant decline in pH, followed by a sharp rise. The peak of this pH rise is indicative of imminent ovulation, which generally coincides with a second pH decline of variable degree. The apparatus provides provisions for automatically taking the pH readings, analysing them, and displaying to the user the daily fertility status.
Patent NZ-326394-A (NZ)
Title: Set of blanks, box, method and machine for making a box from such a set of blanks
Inventor: MATHIEU GERARD
IPC: B31B7/00
Filed: 1997-06-21
Abstract: PCT No. PCT/FR97/00113 Sec. 371 Date Jul. 21, 1998 Sec. 102(e) Date Jul. 21, 1998 PCT Filed Jan. 21, 1997 PCT Pub. No. WO97/27114 PCT Pub. Date Jul. 31, 1997A set of blanks, a box, a method and a machine for making a packaging box that includes at least two blanks made of a fiberboard or corrugated fiberboard sheet material, i.e. a first blank comprising a series of at least four flaps for forming the side walls of the box, and a second blank comprising at least two panels joined together along a third fold line. The second blank straddles at least one fold line of the first blank, the first panel is attached to and/or centred on the first blank, and at least one of the second panels is attached to the first blank via means that enable movement of the second panels relative to the first blank when the box is formed by simultaneously wrapping said blanks around a volume having a predetermined size.
Patent NZ-335364-A (NZ)
Title: Pellets having a core 250-355 um coated with an antifungal and a polymer, pharmaceutical, and process
Inventor: VANDECRUYS ROGER PETRUS GEREBE
IPC: A61K9/48
Filed: 1998-03-18
Abstract: A pellet comprising: a) a central, rounded or spherical core which has a diameter from 250 to 355ìm (45-60 mesh) b) coating film of a water-soluble polymer and an antifungal agent c) a seal-coating polymer layer. Further disclosed is a pharmaceutical dosage form and a process for preparing the pellets by spraying sugar spheres with an antifungal agent and a water soluble polymer in a solvent of methylene chloride and ethanol in a fluidized bed granulator equipped with a Wurster (bottom spray) insert.
Patent NZ-337320-A (NZ)
Title: Pruning machine including two sets of cutting wheels mounted side by side
Inventor: SPAGNOLO FRED
IPC: A01G3/04
Filed: 1998-01-05
Abstract: Provided is a pruning apparatus mountable on a tractor for high speed pruning of vines and fruit trees comprising two sets of pruning wheels, characterized that each set of pruning wheels includes a first mounting plate having a central axis and an outer edge; a first set of blades mounted on the first mounting plate and protruding outwardly form the outer edge, a second mounting plate having a central axis and an outer edge located close to the first mounting plate so that the respective central axes and outer edges substantially coincide, and a second set of blades mounted on the second mounting plate and protruding outwardly from the second mounting plate outer edge, wherein during operation, the first set of blades rotates relative to the second set of blades so that scissor like cutting actions are formed between them and wherein the blades on the first mounting plate and/or the blades of  the second mounting plate taper from a broader width at the outer edge of the respective mounting plated to a narrower width at the point furthest from the central axis.