公开(公告)号：US5897246A

公开(公告)日：1999-04-27

申请号：US822867

申请日：1997-03-24

申请人： Keitaro Yamashita

发明人： Keitaro Yamashita

IPC分类号： G03G15/09

CPC分类号： G03G15/0921

摘要： A magnet roll including a cylindrical permanent magnet having a surface thereon a plurality of magnetic poles which extend along an axis of the magnet roll and an electroconductive ceramic layer formed at least on a circumferential surface of the cylindrical permanent magnet. The electroconductive ceramic layer may be TiC, WC, TiN, TiCN, CrN, ZrN, HfN, Ti+TiN, and Cr+CrN. The magnet roll is used in a developing method of developing a latent image on a photosensitive drum by a magnetic developer while applying a bias voltage to a developing zone, in which the number of the magnetic poles (N) satisfies the relation: N.gtoreq.(V.sub.1 /V.sub.2).times..pi.D/6, wherein V.sub.1 is a peripheral speed (mm/s) of the photosensitive drum, V.sub.2 is a peripheral speed of the magnet roll and D is an outer diameter (mm) of the magnet roll.

摘要翻译： 一种磁辊，包括具有表面的圆柱形永磁体，所述圆柱形永磁体具有沿磁体辊的轴线延伸的多个磁极和至少形成在圆柱形永磁体的圆周表面上的导电陶瓷层。 导电陶瓷层可以是TiC，WC，TiN，TiCN，CrN，ZrN，HfN，Ti + TiN和Cr + CrN。 磁体辊用于通过磁性显影剂在感光鼓上显影潜像的显影方法，同时向显影区域施加偏置电压，其中磁极数（N）满足关系：N> / =（V1 / V2）×piD / 6，其中V1是感光鼓的圆周速度（mm / s），V2是磁体辊的圆周速度，D是磁体辊的外径（mm） 。

公开(公告)号：US5537216A

公开(公告)日：1996-07-16

申请号：US433588

申请日：1995-05-03

申请人： Keitaro Yamashita ,  Masatoshi Kawano

发明人： Keitaro Yamashita ,  Masatoshi Kawano

IPC分类号： G11B20/02 ,  G01B15/04 ,  G11B19/02 ,  G11B20/00 ,  H04N5/913 ,  H04N7/16 ,  H04N5/76 ,  H04N7/167

CPC分类号： G01B15/04 ,  G11B19/02 ,  G11B20/00086 ,  H04N5/913 ,  H04N7/166

摘要： A spurious signal SSP whose frequency spectrum is located at frequencies [(N+(1/2)).multidot.fh] is multiplexed with a luminance signal Y so as to keep an interleaved relation between the spurious signal SSP and the luminance signal Y and the resultant signal is transmitted. When the spurious signal SSP is detected, the recording operation is inhibited. The spurious signal SSP is multiplexed with the luminance signal Y at a level such as not to exert an influence on the picture quality when the video signal is reproduced and seen by a monitor screen.

摘要翻译： 其频谱位于频率[（N +（1/2））xfh]处的寄生信号SSP与亮度信号Y多路复用，以保持杂散信号SSP和亮度信号Y之间的交织关系，并且得到的信号 被传送。 当检测到杂散信号SSP时，禁止记录操作。 寄生信号SSP与亮度信号Y以等级不同，当视频信号被监视器屏幕再现和观看时，不对图像质量产生影响。

公开(公告)号：US5488341A

公开(公告)日：1996-01-30

申请号：US254877

申请日：1994-06-06

申请人： Mikio Yamamoto ,  Keitaro Yamashita ,  Katsunobu Kiriyama

发明人： Mikio Yamamoto ,  Keitaro Yamashita ,  Katsunobu Kiriyama

IPC分类号： B03C1/12 ,  G03G15/09 ,  G03G21/00 ,  H01F7/02 ,  H01F41/02 ,  H01F3/00

CPC分类号： H01F41/028 ,  B03C1/12 ,  G03G15/0921 ,  G03G21/0047 ,  H01F7/0268 ,  Y10T29/49549 ,  Y10T29/49565

摘要： A permanent magnet member composed of an integral sintered body made of a ferrite magnet material, the integral sintered body including a cylindrical center portion and shaft portions formed at the opposite ends of the cylindrical center portion and each having a smaller diameter than that of the cylindrical center portion, the cylindrical center portion being provided with a plurality of magnetic poles extending axially and arranged circumferentially on an outer surface of the cylindrical center portion.

摘要翻译： 一种由铁氧体磁铁材料制成的整体式烧结体构成的永磁体构件，该整体式烧结体包括圆筒形中心部分和形成在圆柱形中心部分两端的轴部分，其直径小于圆柱形中心部分的直径 中心部分，圆柱形中心部分设置有多个沿轴向延伸并且周向设置在圆柱形中心部分的外表面上的磁极。

公开(公告)号：US5381275A

公开(公告)日：1995-01-10

申请号：US102841

申请日：1993-08-06

申请人： Hajime Nitta ,  Masatoshi Takashima ,  Takehiko Saito ,  Tomihiro Nakagawa ,  Keitaro Yamashita

发明人： Hajime Nitta ,  Masatoshi Takashima ,  Takehiko Saito ,  Tomihiro Nakagawa ,  Keitaro Yamashita

IPC分类号： G11B20/00 ,  G11B20/10 ,  G11B27/034 ,  G11B27/32 ,  G11B27/34 ,  H04N5/765 ,  H04N5/85 ,  H04N5/926 ,  H04N7/50 ,  G11B5/09 ,  H04N5/76

CPC分类号： G11B27/034 ,  G11B20/00007 ,  G11B20/10 ,  G11B27/329 ,  H04N19/115 ,  H04N19/126 ,  H04N19/149 ,  H04N19/15 ,  H04N19/154 ,  H04N19/184 ,  H04N19/61 ,  H04N21/4147 ,  H04N21/637 ,  H04N5/9264 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/2529 ,  H04N19/146 ,  H04N5/765 ,  H04N5/85 ,  H04N5/9268

摘要： In step S1, the capacity of the area (remaining quantity) of a disk in which information can be recorded is read, and the remaining quantity is displayed in step S2. After a user inputs the recording time of information to be recorded and the recording capacity w for the recording, an average transmission rate R.sub.1 is calculated from expression R.sub.1 =w/t-.alpha. in step S4. The rate .alpha. is the transmission rate for transmitting signals other than a video signal, such as an audio signal, attached to the video signal. Data obtained by applying a DCT treatment to the video data is quantized with a quantization width corresponding to the average transmission rate R.sub.1 and this data is intermittently recorded on the disk.

摘要翻译： 在步骤S1中，读取可以记录信息的盘的区域（剩余量）的容量，并且在步骤S2中显示剩余量。 在用户输入要记录的信息的记录时间和用于记录的记录容量w之后，在步骤S4中根据表达式R1 = w / t-α计算平均传输速率R1。 速率α是用于发送附加到视频信号的视频信号（例如音频信号）以外的信号的传输速率。 通过对视频数据应用DCT处理获得的数据以对应于平均传输速率R1的量化宽度量化，并且该数据被间歇地记录在盘上。

公开(公告)号：US5182680A

公开(公告)日：1993-01-26

申请号：US659568

申请日：1991-02-22

申请人： Keitaro Yamashita ,  Eiji Ogura

发明人： Keitaro Yamashita ,  Eiji Ogura

IPC分类号： G11B20/10 ,  G11B15/02 ,  G11B15/087 ,  G11B20/00 ,  H04N5/913 ,  H04N5/93

CPC分类号： G11B15/087 ,  G11B15/02 ,  G11B20/00086 ,  H04N5/913 ,  H04N2005/91321 ,  H04N5/93

摘要： A recording control system for preventing undesirable copy of information reproduced from a video tape onto another tape. The system includes a unit for receiving audio and video information signals from a video tape reproducing apparatus, a circuit for receiving an identification code from the video tape reproducing apparatus, a circuit for receiving timing signals from the video tape reproducing apparatus, a circuit for decoding the received identification code with reference to the received timing signals to generate recording control signals, a unit for recording the received audio and video information signals onto a video tape, and a circuit for controlling an operation of the recording unit in response to the recording control signals.

摘要翻译： 一种记录控制系统，用于防止从录像带再现的信息的不期望的复制到另一个磁带上。 该系统包括用于从视频磁带再现装置接收音频和视频信息信号的单元，用于从视频磁带再现装置接收识别码的电路，用于从视频磁带再现装置接收定时信号的电路，用于解码的电路 参考接收到的定时信号接收的识别码以产生记录控制信号，用于将接收到的音频和视频信息信号记录到录像带上的单元，以及用于响应于记录控制来控制记录单元的操作的电路 信号。

公开(公告)号：US5121259A

公开(公告)日：1992-06-09

申请号：US434431

申请日：1989-11-13

申请人： Keitaro Yamashita

发明人： Keitaro Yamashita

IPC分类号： G11B5/008 ,  G11B15/18 ,  G11B27/024 ,  G11B27/029

CPC分类号： G11B27/024 ,  G11B15/1875 ,  G11B27/029 ,  G11B2220/90

摘要： A video tape recording apparatus having a tape guide drum with a cylindrical outer surface for guiding a magnetic tape in a helical fashion on the outer surface, and a pair of rotary magnetic heads rotating at a predetermined speed and provided in association with the tape guide drum for scanning skewed parallel tracks on the magnetic tape is specially adapted to perform after recording or dubbing. Each of the tracks is formed having a length to accommodate a pair of audio portions and a center video portion provided between the pair of audio portions. Rotational angles of the rotary magnetic heads corresponding to the length of the audio portions and the center video portion are expressed as follows,.THETA.a+.THETA.v=.THETA.b+.THETA.v=180.degree.where .THETA.a and .THETA.b correspond to the audio portions and .THETA.v corresponds to the center video portion, respectively. In the case of audio after recording, selected audio portions are left blank during the initial recording operation and the after recording audio signal is recorded therein at a later time.

公开(公告)号：US4992767A

公开(公告)日：1991-02-12

申请号：US461301

申请日：1990-01-05

申请人： Waichi Hozumi ,  Keitaro Yamashita

发明人： Waichi Hozumi ,  Keitaro Yamashita

IPC分类号： G03G15/09 ,  G03G21/00 ,  H01F7/02

CPC分类号： G03G15/0921 ,  G03G21/0047 ,  G03G2221/0005

摘要： The magnet roll according to the present invention comprises (a) first and second shafts rotatable around the same axis relative to each other; (b) a permanent magnet member fixed around the second shaft and having a plurality of magnetic poles extending along the axis of the second shaft on its outer surface; (c) a first flange member connected to the first shaft and rotatably supporting one end of the second shaft; (d) a second flange member rotatably supported by the second shaft; (e) a hollow cylindrical sleeve made of a plastically deformable non-magnetic material and fixed to the first and second flange members on both ends such that it encircles the permanent magnet member rotatably relative to the permanent magnet member; and (f) an inner diameter-increased area provided in each side end portion of the sleeve, which receives each flange member and is folded inward over each flange member to fix the sleeve to each flange member.

摘要翻译： 根据本发明的磁体辊包括（a）可相对于彼此围绕相同轴线旋转的第一和第二轴; （b）固定在所述第二轴上并具有沿着所述第二轴的轴线在其外表面上延伸的多个磁极的永磁体; （c）连接到第一轴并可旋转地支撑第二轴的一端的第一凸缘构件; （d）由第二轴可旋转地支撑的第二凸缘构件; （e）由可塑性变形的非磁性材料制成的中空的圆柱形套筒，并且在两端固定到第一和第二凸缘构件，使得其相对于永磁体构件可旋转地包围永磁体构件; 和（f）设置在所述套筒的每个侧端部中的内径增大区域，其接收每个凸缘构件并在每个凸缘构件上向内折叠以将套筒固定到每个凸缘构件。

公开(公告)号：US4597661A

公开(公告)日：1986-07-01

申请号：US601166

申请日：1984-04-17

申请人： Keitaro Yamashita

发明人： Keitaro Yamashita

IPC分类号： G03G15/09

CPC分类号： G03G15/0928

摘要： A magnet roll assembly for use in an apparatus developing an electrostatic latent image has a permanent magnet member providing a plurality of circumferentially spaced magnetic poles and a non-magnetic sleeve surrounding the permanent magnet member, the non-magnetic sleeve having a roughened surface region terminating at both ends inward relative to both ends of the permanent magnet member, a distance which can be proportional to the pitch of the magnetic poles at the sleeve surface whereby a magnetic developer layer of substantially uniform height is formed along the length of the sleeve surface. The surface roughness of the roughned surface region of the sleeve lies preferably within the range of from 0.5 .mu.m to 3 .mu.m (Rz). The magnet roll assembly is applicable to both magnetic brush-type and jumping-type developing apparatuses.

摘要翻译： 用于显影静电潜像的装置中的磁辊组件具有提供多个周向间隔开的磁极的永磁体构件和围绕永磁体构件的非磁性套筒，非磁性套筒具有终止的粗糙表面区域 在相对于永磁体构件的两端向内相对的两端，距离可以与套筒表面处的磁极的间距成比例，从而沿着套筒表面的长度形成基本上均匀的高度的磁性显影剂层。 套筒的粗糙表面区域的表面粗糙度优选在0.5μm至3μm（Rz）的范围内。 磁辊组件可用于磁刷式和跳式显影装置。

公开(公告)号：US4558294A

公开(公告)日：1985-12-10

申请号：US601372

申请日：1984-04-17

申请人： Keitaro Yamashita

发明人： Keitaro Yamashita

IPC分类号： H01F7/02 ,  H01F41/02

CPC分类号： H01F7/0268 ,  H01F41/028

摘要： A magnet roll comprising a shaft having a polygonal cross section and a plurality of magnet blocks bonded to the shaft and to each other. At least one of the magnet blocks has mating means contacted with the corresponding mating means of the shaft, and an adjacent pair of the magnet blocks are bonded to each other in a positional relationship determined by mating means provided on the contacting surfaces of the adjacent blocks and by contact with the shaft surface. This magnet roll can be assembled very precisely without difficulty.

摘要翻译： 一种磁辊，包括具有多边形横截面的轴和多个粘结到轴上并彼此连接的磁块。 至少一个磁体块具有与轴的对应配合装置接触的配合装置，并且相邻的一对磁体块以由设置在相邻块的接触表面上的配合装置确定的位置关系彼此接合 并与轴表面接触。 该磁体辊可以非常精确地组装而没有困难。

公开(公告)号：US4231320A

公开(公告)日：1980-11-04

申请号：US23002

申请日：1979-03-22

申请人： Masumi Asanae ,  Keitaro Yamashita

发明人： Masumi Asanae ,  Keitaro Yamashita

IPC分类号： G03G15/09

CPC分类号： G03G15/09

摘要： A magnetic brush having an independently rotatable non-magnetic core is disposed in the mouth of a toner supply tank. An upper tank wall and a top portion of the sleeve form a delivery gap and a bottommost tank wall section with the sleeve bottom forms a toner return gap which is disposed in a vertical plane whereby unused toner enters the supply tank in a horizontal direction.

摘要翻译： 具有可独立旋转的非磁芯的磁刷布置在调色剂供应箱的口中。 套筒的上部罐壁和顶部形成输送间隙，并且具有套筒底部的最下面的罐壁部分形成调色剂返回间隙，其设置在垂直平面中，由此未使用的调色剂在水平方向上进入供给箱。