公开(公告)号：US06537463B2

公开(公告)日：2003-03-25

申请号：US09732744

申请日：2000-12-11

Applicant: Katsunori Iwasaki ,  Masahiro Tobise ,  Yasunobu Ogata ,  Mikio Shindo ,  Hiroshi Okajima

Inventor： Katsunori Iwasaki ,  Masahiro Tobise ,  Yasunobu Ogata ,  Mikio Shindo ,  Hiroshi Okajima

IPC: H01F111

CPC classification number: H01F7/0268 ,  H01F1/059 ,  H01F1/09

Abstract: A resin-bonded magnet composed substantially of (a) an R—T—N-based magnetic powder having a basic composition of R&agr;T100−&agr;−&bgr;N&bgr;, wherein R is at least one selected form the group consisting of rare earth elements including Y, T is Fe or Fe and Co, 5≦&agr;≦20, and 5≦&bgr;≦30, (b) a ferrite magnetic powder having a substantially magnetoplumbite-type crystal structure and a basic composition represented by (A1−xR′x) O[(Fe1−yMy)2O3] by atomic ratio, wherein A is Sr and/or Ba, R′ is at least one selected from the group consisting of rare earth elements including Y, La being indispensable, M is Co or Co and Zn, 0.01≦x

Abstract translation: 基本上由以下组成的树脂粘结磁体：（a）具有RalphaT100-α-βNbeta的碱性组成的RTN系磁性粉末，其中R为选自由Y，T组成的稀土元素组成的组中的至少一种，为Fe或 Fe和Co，5 <=α<= 20，5 <=β<= 30，（b）具有大体上磁铅石型晶体结构和由（A1-xR'x）O表示的基本组成的铁氧体磁粉 [（Fe1-yMy） 以原子比计，其中A是Sr和/或Ba，R'是选自包括Y的稀土元素中的至少一种，La是不可缺少的，M是Co或Co和Zn，0.01 <= x <0.4， 0.005 <= y <= 0.04，5.0 <= n <= 6.4，（c）粘合剂。 铁氧体磁铁粉末优选为各向异性，造粒粉末或各向异性烧结铁氧体磁体粉末。

公开(公告)号：US20030025583A1

公开(公告)日：2003-02-06

申请号：US09915133

申请日：2001-07-25

Inventor： Michael John Dixon ,  Robert Edward Hackett ,  Joe Leroy McGuire

IPC: H01F007/02

CPC classification number: H01F7/0268 ,  G03G15/0921

Abstract: A magnetic roller for electrophotography comprises a foamed resin magnetic material. A method of producing a magnetic roller comprises the steps of providing magnetic filler, a resin binder and a foaming agent in a closed mold; activating the foaming agent in the closed mold; and removing the resulting formed roller from the mold.

Abstract translation: 电子照相用磁辊包括发泡树脂磁性材料。 制造磁性辊的方法包括以下步骤：在闭合的模具中提供磁性填料，树脂粘合剂和发泡剂; 活化封闭模具中的发泡剂; 并从模具中取出所形成的辊。

公开(公告)号：US06489871B1

公开(公告)日：2002-12-03

申请号：US09733394

申请日：2000-12-08

Applicant: Simon C. Barton

Inventor： Simon C. Barton

IPC: H01F720

CPC classification number: H01F7/206 ,  B25B11/002 ,  H01F7/0268 ,  H01F13/00 ,  H01F2007/208

Abstract: A magnetic device includes a cylindrical outer pole having a central axis and formed of a ferromagnetic material including a circular base and a cylindrical sleeve defining an outwardly opening cylindrical cavity. A reversible magnetic unit located in said cavity includes a cylindrical core having a magnetic axis aligned with the central axis and a normal magnetic polarity in an inactive state. A cylindrical inner pole formed of a ferromagnetic material is operatively coupled to the core and inwardly radially spaced from said sleeve. An annular band between said sleeve and said inner pole formed of a permanent magnetic material has a magnetic polarity transverse to said central axis and magnetically aligned with said normal magnetic polarity of the core whereby an internal magnetic circuit is established in the inactive state through the poles, the core and the permanent magnet to the exclusion of said workpiece. When the polarity of the core is reversed an external circuit is established between the poles for magnetic coupling with the workpiece.

Abstract translation: 磁性装置包括具有中心轴线并由铁磁材料形成的圆柱形外极，该铁磁材料包括圆形基部和限定向外开口的圆柱形腔的圆柱形套筒。 位于所述空腔中的可逆磁性单元包括具有与中心轴对准的磁轴和处于非活动状态的正常磁极性的圆柱形磁芯。 由铁磁材料形成的圆柱形内极可操作地耦合到芯并且与所述套筒向内径向间隔开。 由永久磁性材料形成的所述套筒和所述内极之间的环形带具有与所述中心轴横向的磁极性，并且与磁芯的所述正常磁极磁性对准，从而通过磁极在内部磁路建立在无效状态 ，芯和永磁体排除所述工件。 当芯的极性反转时，在与工件磁耦合的极之间建立外部电路。

公开(公告)号：US06423264B1

公开(公告)日：2002-07-23

申请号：US09418294

申请日：1999-10-14

Applicant: David Earl Gay

Inventor： David Earl Gay

IPC: H01F103

CPC classification number: H02K15/03 ,  B22F7/06 ,  B22F2003/033 ,  H01F7/0268 ,  H01F41/0266 ,  Y10T29/4902

Abstract: A method of a manufacturing rotating electromagnetic component to have both soft and hard (permanent) magnet regions, in which powder technologies are used to net-shape mold the component. A soft magnet powder material and an insert or powder of a permanent magnet material are compacted to form a rotating electromagnetic body containing soft and hard magnet regions. A partial sintering operation is then performed on the body at a temperature of 1600° F. (about 870° C.) or less, preferably about 1400° F. to 1500° F. (about 760° C. and 830° C.), and most preferably at 1500° F. to at least partially fuse the soft magnet powder materials with the permanent magnet material. The soft powder component of the resulting electromagnetic body is sufficiently fused to exhibit mechanical properties comparable to a fully sintered body (i.e., sintered at 2050° F. (about 1120° C.) or more), but without degrading the magnetic properties of the hard magnet region.

Abstract translation: 一种制造旋转电磁部件的方法，其具有软和硬（永久）磁体区域，其中使用粉末技术来对部件进行网状模制。 软磁体粉末材料和永磁材料的插入物或粉末被压实以形成包含软和硬磁体区域的旋转电磁体。 然后在1600°F（约870℃）或更低，优选约1400°F至1500°F（约760℃和830℃）的温度下对身体进行部分烧结操作。 ），最优选在1500°F，以使软磁体粉末材料与永磁体材料至少部分地熔合。 所得到的电磁体的软质粉末成分被充分熔化，以表现出与完全烧结体相当的机械性能（即，在2050°F（约1120℃）或更高温度下烧结），但不会降低 硬磁区。

公开(公告)号：US06422984B1

公开(公告)日：2002-07-23

申请号：US09503835

申请日：2000-02-15

Applicant: Roger D. Masham ,  Claire Dawn Ireland

Inventor： Roger D. Masham ,  Claire Dawn Ireland

IPC: B23D1500

CPC classification number: H01F7/0268 ,  G03G15/0921 ,  Y10T29/49544

Abstract: A magnetic roll, such as for use in a xerographic printing apparatus, is formed from two semicylindrical partial cylinders. The partial cylinders can be molded and attached to each other to form a complete cylinder defining magnetic poles along the circumference thereof.

Abstract translation: 诸如用于静电复印印刷设备的磁辊由两个半圆柱形部分圆筒形成。 部分圆柱体可以被模塑并且彼此附接以形成沿其圆周限定磁极的完整圆柱体。

公开(公告)号：US06421519B1

公开(公告)日：2002-07-16

申请号：US09725904

申请日：2000-11-30

Applicant: Keitaro Yamashita ,  Masahiro Tobise

Inventor： Keitaro Yamashita ,  Masahiro Tobise

IPC: G03G1509

CPC classification number: H01F1/059 ,  G03G15/0921 ,  H01F7/0268

Abstract: A magnet roll has a plurality of magnetic poles on a surface with at least one magnetic pole portion being composed of an anisotropic bonded magnet including magnet powder and binder resin. The anisotropic bonded magnet contains R—T—N magnet powder, wherein R is at least one rare earth element including Y, Sm being indispensable, and T is Fe or Fe and Co. The R—T—N magnet powder may also contain inevitable impurities such as C, O and H. The binder resin constitutes 20-70% of the volume of the anisotropic bonded magnet such that the anisotropic bonded magnet have a maximum energy product (BH)max of 10 MGOe or more and a residual magnetization Br of 2800 G or more.

Abstract translation: 磁辊在表面上具有多个磁极，其中至少一个磁极部分由包含磁体粉末和粘合剂树脂的各向异性粘结磁体构成。 各向异性粘结磁体含有RTN磁体粉末，其中R为至少一种稀土元素，包括Y，Sm是不可缺少的，T是Fe或Fe和Co。RTN磁体粉末也可能含有不可避免的杂质如C，O和H 粘结剂树脂构成各向异性粘结磁体体积的20-70％，使得各向异性粘结磁体的最大能量乘积（BH）max为10MGOe以上，剩余磁化强度Br为2800G以上。

公开(公告)号：US20010023933A1

公开(公告)日：2001-09-27

申请号：US09784046

申请日：2001-02-16

Inventor： Yasunobu Ogata ,  Yutaka Kubota ,  Takashi Takami ,  Shuichi Shiina

IPC: H01F001/11

CPC classification number: C01G49/0054 ,  C01G49/0063 ,  C01G49/0072 ,  C01G51/006 ,  C01G53/006 ,  C01P2002/52 ,  C01P2004/45 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/42 ,  C04B35/2633 ,  C04B35/2683 ,  C04B35/6261 ,  C04B35/6262 ,  C04B35/62625 ,  C04B35/6263 ,  C04B35/63 ,  C04B2235/3213 ,  C04B2235/3224 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3232 ,  C04B2235/3239 ,  C04B2235/3262 ,  C04B2235/3274 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/6022 ,  C04B2235/72 ,  C04B2235/724 ,  C04B2235/726 ,  C04B2235/727 ,  C04B2235/767 ,  H01F1/11 ,  H01F1/113 ,  H01F7/0268 ,  H01F41/0273

Abstract: A ferrite powder for bonded magnets having a substantially magnetoplumbite-type crystal structure and an average diameter of 0.9-2 nullm, the ferrite powder having a basic composition represented by the following general formula: (A1-xRx)O.nnull(Fe1-yMy)2O3null by atomic ratio, wherein A is Sr and/or Ba; R is at least one of rare earth elements including Y, La being indispensable; M is at least one element selected from the group consisting of Co, Mn, Ni and Zn; and x, y and n are numbers meeting the conditions of 0.01nullxnull0.4, nullx/(2.6n)nullnullynullnullx/(1.6n)null, and 5nullnnull6, (SinullCa) being 0.2 weight % or less, and (AlnullCr) being 0.13 weight % or less, can be produced by mixing iron oxide containing 0.06 weight % or less of (SinullCa) and 0.1 weight % or less of (AlnullCr) with compounds of A, R and M elements, calcining the resultant mixture for ferritization, pulverizing the resultant magnetically isotropic ferrite and then heat-treating the pulverized ferrite at 750-950null C. for 0.5-3 hours in the air.

Abstract translation: 铁氧体粉末，具有基本上为磁铅石型晶体结构，平均直径为0.9〜2μm的铁氧体粉末，所述铁氧体粉末具有以下通式表示的基本组成：（A1-xRx）On [（Fe1-yMy） 2O3]，其中A是Sr和/或Ba; R是包括Y，La不可缺少的稀土元素中的至少一种; M是选自Co，Mn，Ni和Zn中的至少一种元素; 并且x，y和n是满足0.01 <= x <= 0.4，[x /（2.6n）] <= y <= [x /（1.6n）]和5 <= n <= 6 ，（Si + Ca）为0.2重量％以下，（Al + Cr）为0.13重量％以下，可以通过混合含有0.06重量％以下的（Si + Ca）和0.1重量％的氧化铁或 将Al（Al + Cr）与A，R和M元素的化合物相比较，煅烧所得的铁素体混合物，粉碎所得的磁各向同性铁素体，然后在750-950℃下热处理粉碎的铁素体0.5-3小时 在空中。

公开(公告)号：US6132634A

公开(公告)日：2000-10-17

申请号：US280851

申请日：1999-03-30

Applicant: Yoichi Nishimuro ,  Munenori Iizuka ,  Kunio Machida ,  Hideharu Daifuku

Inventor： Yoichi Nishimuro ,  Munenori Iizuka ,  Kunio Machida ,  Hideharu Daifuku

IPC: G03G15/09 ,  H01F1/055 ,  H01F1/057 ,  H01F1/08 ,  H01F7/02 ,  G03G15/06

CPC classification number: H01F1/083 ,  G03G15/0921 ,  H01F1/0558 ,  H01F1/0578 ,  H01F7/0268

Abstract: A bonded magnet featuring mechanical strength is obtained from a bonded magnet-forming composition comprising magnetic powder and a binder wherein the binder is based on highly crystalline polypropylene in one form or contains a modified polyolefin in another form. Also provided is a magnet roller comprising a magnet body (1) of bonded magnet configured into a roller shape and a shaft (2) associated therewith wherein at least the magnet body (1) is formed from the bonded magnet-forming composition.

Abstract translation: 具有机械强度的粘结磁体由包含磁性粉末和粘合剂的粘合磁体形成组合物获得，其中粘合剂基于一种形式的高度结晶的聚丙烯或含有另一种形式的改性聚烯烃。 还提供了一种磁性辊，其包括构造成辊状的粘结磁体的磁体（1）和与其相关联的轴（2），其中至少磁体（1）由粘结磁体形成组合物形成。

公开(公告)号：US6021296A

公开(公告)日：2000-02-01

申请号：US35034

申请日：1998-03-05

Applicant: Hajime Tamura ,  Yasuro Shiomura

Inventor： Hajime Tamura ,  Yasuro Shiomura

IPC: G03G15/09 ,  H01F7/02 ,  H01F41/02

CPC classification number: G03G15/0921 ,  H01F41/0273 ,  H01F7/0268

Abstract: A magnet roller capable of adjusting the height and position of a magnetic force peak after formation of a roller, and easily meeting a requirement to attain a complex magnetic force pattern without significantly increasing the cost. In the magnet roller, at least two kinds of first magnet pieces and second magnet pieces different from each other in orientation characteristic of magnetic powders are fixedly disposed around the outer periphery of a shaft. The first magnet pieces is a magnet piece in which anisotropic magnetic powders are oriented in such a manner to converge from both the side surfaces and the back surface to a specific position on the front surface side. The second magnet pieces are one kind or two or more kinds of magnet pieces such as a magnet piece in which anisotropic magnetic powders are oriented at random, a magnet piece in which anisotropic magnetic powders are uniformly or radially oriented in a specific direction from the back surface side to the front surface side, and a magnet piece using isotropic magnetic powders with no orientation characteristic.

Abstract translation: 一种能够在形成辊之后调节磁力峰值的高度和位置的磁性辊，并且容易满足达到复杂磁力图案的要求而不显着增加成本。 在磁铁辊中，在轴的外周周围固定配置至少两种磁粉取向特性彼此不同的第一磁铁片和第二磁铁片。 第一磁体片是磁铁片，其中各向异性磁性粉末以从侧表面和后表面两个会聚到前表面侧的特定位置的方式定向。 第二磁体片是各向异性磁性粉末随机取向的磁铁片之类的一种或两种以上的磁性片，其中各向异性磁性粉末从背面向特定方向均匀地或径向取向的磁片 表面侧到前表面侧，以及使用不具有取向特性的各向同性磁性粉末的磁体片。

公开(公告)号：US6000922A

公开(公告)日：1999-12-14

申请号：US123817

申请日：1998-07-28

Applicant: Jennifer R. Wagner ,  Moritz P. Wagner

Inventor： Jennifer R. Wagner ,  Moritz P. Wagner

IPC: B29C33/30 ,  B29C33/32 ,  G03G15/09 ,  H01F7/02 ,  H01F41/02 ,  B28B17/00

CPC classification number: G03G15/0921 ,  B29C33/308 ,  B29C33/32 ,  H01F41/028 ,  H01F7/0268 ,  B29K2995/0008 ,  Y10S425/033

Abstract: A molding assembly for producing a magnetic development roller having relatively precise magnetic development fields for use in an electrostatographic reproduction machine to develop a latent image recorded on a photoconductive member of the machine. The molding assembly includes a cylindrical member having a first end, a second end, a first radius, and a shell portion. The shell portion includes an outer surface, and an inner surface defining a molding cavity that has a second radius corresponding to an outer radius of a magnetic development roller molded within the molding cavity. The molding assembly also includes a plurality of circumferentially spaced channels formed within the shell portion, with each channel of the plurality having generally parallel walls, and being located immediately adjacent the inner surface of the shell portion for containing a permanent magnet suitable for inducing a magnetic field in a magnetic development roller molded within the molding cavity. A permanent magnet is placed within each channel of the plurality of channels, and is spaced from each wall of the parallel walls of each channel. As placed, the permanent magnet defines an adjustment space therefor with each wall of the parallel walls. Importantly, the molding assembly includes an adjustment device for precisely adjusting a magnetizing position of the permanent magnet within the adjustment space. The adjustment device includes at least one pair of first members for adjustably moving the permanent magnet radially relative to a center of the molding cavity, and at least one pair of second members for translating the permanent magnet non-radially relative to a center of the molding cavity, thus efficiently adjusting the magnetizing position of the permanent magnet for inducing relatively precise magnetic development fields in a magnetic development roller molded within the molding cavity.