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1. 发明授权

US07197264B2 Image forming apparatus 失效
标题翻译：图像形成装置
公开(公告)号：US07197264B2
公开(公告)日：2007-03-27
申请号：US11020251
申请日：2004-12-27
申请人： Hiroaki Umemoto , Noritoshi Hagimoto , Kuniya Matsuura , Akira Hirota , Naotoshi Kawai , Kentaro Katori
发明人： Hiroaki Umemoto , Noritoshi Hagimoto , Kuniya Matsuura , Akira Hirota , Naotoshi Kawai , Kentaro Katori
IPC分类号： G03G15/30
CPC分类号： G03G21/0064 , G03G2215/0119
摘要： It is intended to provide an image forming apparatus capable of conducting charge adjustment of post-transfer residual toner appropriately by securing a contact area of a temporarily-collecting member and an electrode, without applying excessive deformation load to the temporarily-collecting member. There are arranged a brush roller for temporarily collecting post-transfer residual toner, and an electrode of which inwardly-curved face being in contact with the brush roller in a toner charge apparatus. Thereby, charged-in-opposite-polarity toner, out of post-transfer residual toner, is collected by the brush roller, polarity of the toner is reversed to original polarity, and then, returned to a photosensitive drum. The inner face of the electrode, i.e., a contact face of the electrode and the brush roller is formed in an inwardly-curved face. Thereby, a large contact area and light pushing force of the electrode to the brush roller can go together.
摘要翻译：旨在提供一种图像形成装置，其能够通过确保临时收集构件和电极的接触面积而适当地进行后转印残留调色剂的电荷调节，而不对临时收集构件施加过大的变形负荷。布置有用于临时收集转印后残留调色剂的刷辊，以及在调色剂充电装置中与刷辊接触的向内弯曲面的电极。由此，转印后的残留调色剂中的带电的相反极性调色剂由刷辊收集，调色剂的极性反转到原始极性，然后返回到感光鼓。电极的内表面，即电极和刷辊的接触面形成为向内弯曲的面。因此，电极对刷辊的大的接触面积和轻推力可以一起走。

2. 发明授权

US5940661A Image forming apparatus with a charging member which removes smears on an image forming member 失效
标题翻译：具有去除图像形成部件上的涂片的充电部件的图像形成装置
公开(公告)号：US5940661A
公开(公告)日：1999-08-17
申请号：US22472
申请日：1998-02-12
申请人： Masataka Yagi , Tamotsu Sakuraba , Tetsumaru Fujita , Narutaka Yoshida , Akira Hirota , Tsugihito Yoshiyama , Masami Matsuura , Yasuhiro Nakagami , Masayasu Haga
发明人： Masataka Yagi , Tamotsu Sakuraba , Tetsumaru Fujita , Narutaka Yoshida , Akira Hirota , Tsugihito Yoshiyama , Masami Matsuura , Yasuhiro Nakagami , Masayasu Haga
IPC分类号： G03G15/02 , G03G21/00
CPC分类号： G03G15/0216 , G03G15/025 , G03G21/0064 , G03G2215/023 , G03G2221/0005
摘要： An image forming apparatus with a charging member that allows easy removal of smears from an image forming drum. The apparatus removes smears from the image forming drum by placing a different portion of the charging member in contact with the drum. The apparatus uses a cam or a solenoid to press on the charging member to cause a different portion of the charging member to come into contact with the image forming drum.
摘要翻译：一种具有充电部件的图像形成装置，其允许容易地从成像鼓中去除污点。该装置通过将充电构件的不同部分与滚筒接触来从图像形成滚筒中去除污迹。该装置使用凸轮或螺线管按压充电构件，使充电构件的不同部分与图像形成鼓接触。

3. 发明授权

US4757391A Helical scan type magnetic recording and reproducing apparatus recording multiple signals on multiple axially displaced tape tracks 失效
标题翻译：螺旋扫描型磁记录和再现装置，在多个轴向移位磁带上记录多个信号
公开(公告)号：US4757391A
公开(公告)日：1988-07-12
申请号：US833861
申请日：1986-02-26
申请人： Akira Hirota , Yasutoshi Matsuo
发明人： Akira Hirota , Yasutoshi Matsuo
IPC分类号： H04N5/7826 , H04N9/82 , H04N9/825 , H04N5/782
CPC分类号： H04N9/825 , H04N5/7826 , H04N9/8222 , H04N9/8255
摘要： A helical scan type magnetic recording and reproducing apparatus comprises a rotary body which is wrapped with a magnetic tape on an outer peripheral surface thereof over a predetermined angular range and has a tape guide for guiding a part of the magnetic tape, and n pairs of rotary heads mounted on the rotary body. Each pair out of the n pairs of rotary heads is constituted by two rotary heads which are mounted at mutually opposite positions on a rotational plane of the rotary body at the same height position, and each pair out of the n pairs of rotary heads is mounted at different positions in an axial direction of the rotary body. The n pairs of rotary heads simultaneously record a luminance signal and two kinds of signals constituting a color video signal on n groups of tracks which are mutually separated in the tape width direction, so that the luminance signal is recorded on one group of tracks which is closest to the tape guide of the rotary body in order to minimize a jitter in the luminance signal which is reproduced.
摘要翻译：螺旋扫描型磁记录和再现装置包括：旋转体，其在其外周表面上用磁带包裹预定的角度范围，并且具有用于引导磁带的一部分的带引导件，以及n对旋转体头部安装在旋转体上。 n对旋转头中的每一对由两个旋转头组成，两个旋转头安装在相同高度位置处的旋转体的旋转平面上相互相对的位置处，并且n对旋转头中的每对旋转头被安装在旋转体的轴向的不同位置。 n对旋转磁头在带宽方向上相互分离的n组磁道上同时记录构成彩色视频信号的亮度信号和两种信号，从而将亮度信号记录在一组磁迹上最靠近旋转体的磁带引导件，以便最小化再现的亮度信号中的抖动。

4. 发明授权

US4719518A Magnetic recording apparatus for carrying out recording by selectively using one of two kinds of recording systems 失效
标题翻译：用于通过选择性地使用两种记录系统之一进行记录的磁记录装置
公开(公告)号：US4719518A
公开(公告)日：1988-01-12
申请号：US899545
申请日：1986-08-22
申请人： Koichi Kido , Kenji Shibayama , Masahiko Tsuruta , Akira Hirota , Masato Mihara , Osamu Inoue
发明人： Koichi Kido , Kenji Shibayama , Masahiko Tsuruta , Akira Hirota , Masato Mihara , Osamu Inoue
IPC分类号： H04N5/782 , H04N5/7826 , H04N9/79 , H04N9/793 , H04N9/802 , H04N9/82 , H04N9/825 , H04N9/835 , H04N9/86 , H04N
CPC分类号： H04N5/78263 , H04N5/78213 , H04N9/7921 , H04N9/7936 , H04N9/802 , H04N9/8222 , H04N9/8255 , H04N9/835 , H04N9/86
摘要： A magnetic recording apparatus for carrying out a recording by selectively using one of two kinds of recording systems comprises first through fourth rotary magnetic heads, a first circuit for producing an FM luminance signal, second and third circuits for producing first and second frequency division multiplexed signals, and a switching circuit. The first and second heads are mounted on a rotary body at mutually opposing positions, and have the same height position. The third and fourth heads are mounted on the rotary body at mutually opposing positions respectively in vicinities of the first and second heads along a rotating direction of the rotary body, and have the same height position. The switching circuit selectively supplies the output signals of the first and second circuits to the first through fourth heads when a luminance/color separation recording system is selected as the recording system, and selectively supplies the output signal of the third circuit to the first and second heads or to the third and fourth heads when a low band conversion color recording system is selected as the recording system.
摘要翻译：通过选择性地使用两种记录系统中的一种进行记录的磁记录装置包括第一至第四旋转磁头，用于产生FM亮度信号的第一电路，用于产生第一和第二频分复用信号的第二和第三电路，以及开关电路。第一和第二头部在彼此相对的位置处安装在旋转体上，具有相同的高度位置。第三和第四头部沿着旋转体的旋转方向分别在第一和第二头部附近相互相对的位置处安装在旋转体上，并且具有相同的高度位置。当选择亮度/颜色分离记录系统作为记录系统时，切换电路选择性地将第一和第二电路的输出信号提供给第一至第四磁头，并且选择性地将第三电路的输出信号提供给第一和第二磁头当选择低频转换彩色记录系统作为记录系统时，磁头或者到第三和第四磁头。

5. 发明授权

US4646165A Chrominance signal recording apparatus utilizing digital sampling and quantizing techniques 失效
标题翻译：色度信号记录装置利用数字采样和量化技术
公开(公告)号：US4646165A
公开(公告)日：1987-02-24
申请号：US673133
申请日：1984-11-19
申请人： Akira Hirota
发明人： Akira Hirota
IPC分类号： H04N9/79 , H04N9/83 , H04N9/84 , H04N9/493
CPC分类号： H04N9/84 , H04N9/831
摘要： A carrier chrominance signal recording apparatus comprises a first circuit for sampling a carrier chrominance signal at a sampling frequency which is four times a chrominance subcarrier frequency, and then quantizing the sampled signal so as to produce a first digital color signal, a second circuit for subjecting the first digital color signal to a phase shift process so as to produce a second digital color signal related to a carrier chrominance signal in which the phase of a chrominance subcarrier is equivalently and successively shifted by approximately 90.degree. in a predetermined direction for every one horizontal scanning period, a third circuit for converting the output second digital color signal of the second circuit into a frequency converted digital color signal which is in a low-frequency range, a circuit for obtaining an analog frequency converted carrier chrominance signal by subjecting the frequency converted digital color signal to a digital-to-analog conversion, and a circuit for recording the analog frequency converted carrier chrominance signal on a recording medium. A reproducing apparatus reproduces the signals recorded on the recording medium by the above recording apparatus.
摘要翻译：载波色度信号记录装置包括：第一电路，用于以采样频率对色度副载波频率进行采样的载波色度信号进行采样，然后量化采样信号以产生第一数字彩色信号;第二电路，将第一数字彩色信号转换为相移处理，以便产生与载波色度信号相关的第二数字彩色信号，其中色度副载波的相位在每一个水平方向上沿预定方向相等地相继偏移大约90° 用于将第二电路的输出的第二数字彩色信号转换为低频范围的频率转换的数字彩色信号的第三电路，用于通过对转换后的频率进行转换而获得模拟频率转换的载波色度信号的电路数字彩色信号转换为数模转换，电路用于在记录介质上记录模拟变频载波色度信号。再现装置通过上述记录装置再现记录在记录介质上的信号。

6. 发明授权

US4644412A Video signal recording and reproducing apparatus 失效
标题翻译：视频信号记录和再现装置
公开(公告)号：US4644412A
公开(公告)日：1987-02-17
申请号：US752551
申请日：1985-07-08
申请人： Naomichi Nishimoto , Akira Hirota , Yoshiteru Kosaka
发明人： Naomichi Nishimoto , Akira Hirota , Yoshiteru Kosaka
IPC分类号： G11B20/10 , H04N5/92 , H04N9/797
CPC分类号： H04N9/797
摘要： A video signal recording and reproducing apparatus comprises a circuit for generating a first signal having a sampling frequency f.sub.s which is approximately a natural number multiple of a horizontal scanning frequency f.sub.H of an input composite video signal and satisfies f.sub.s .apprxeq.f.sub.L +f.sub.U and having a phase which differs by 180.degree. for every one field, where f.sub.L represents a constant frequency in the range of 0.5 to 1 MHz and f.sub.U represents an upper limit frequency of a band required for a reproduced composite video signal, a circuit for sampling a signal part of the input composite video signal at least excluding synchronizing signal intervals thereof by the first signal, a circuit for recording and reproducing the sampled signal on and from a recording medium, a circuit for obtaining from the reproduced signal first and second reproduced sampled signals having a mutual time difference of one field, a circuit for generating from the reproduced signal a second signal having the frequency f.sub.s and having a phase which differs by 180.degree. for every one field, and a circuit supplied with the second signal for alternately and selectively passing the first and second reproduced sampled signals for every 1/2 period of the second signal so as to obtain a reproduced composite video signal which has been re-sampled.
摘要翻译：视频信号记录和再现装置包括一个电路，用于产生具有大约是输入的复合视频信号的水平扫描频率fH的自然数倍的采样频率fs的第一信号，并且满足fs APPROX fL + fU并具有相位对于每个场，其不同于180°，其中fL表示在0.5至1MHz的范围内的恒定频率，fU表示再现的复合视频信号所需的频带的上限频率，用于对信号部分进行采样的电路所述输入复合视频信号至少排除由所述第一信号的同步信号间隔，用于在记录介质上记录和再现所述采样信号的电路，用于从再现信号获得具有相互的第一和第二再现采样信号的电路一个场的时间差，用于从再现信号产生具有频率fs an的第二信号的电路 d具有对于每一场相差180°的相位，以及提供有第二信号的电路，用于交替地且选择性地通过第二信号的每1/2周期的第一和第二再现采样信号，以便获得再现已重新采样的复合视频信号。

7. 发明授权

US4490749A Color video signal recording and/or reproducing system 失效
标题翻译：彩色视频信号记录和/或再现系统
公开(公告)号：US4490749A
公开(公告)日：1984-12-25
申请号：US322974
申请日：1981-11-19
申请人： Akira Hirota
发明人： Akira Hirota
IPC分类号： H04N9/83 , H04N9/84 , H04N9/493
CPC分类号： H04N9/84 , H04N9/83
摘要： A recording system in a color video signal recording and/or reproducing system comprises a first filter for separating a luminance signal from a color video signal, a modulator for frequency-modulating the luminance signal, a second filter for separating a carrier chrominance signal from the color video signal, a first frequency converter for converting the frequency band of the carrier chrominance signal to a frequency band which is lower than frequencies occupied by the output luminance signal of the modulator, a superimposing circuit for superimposing the output of the frequency modulator and the output of the first frequency converter one on the other, a recording circuit for recording the superimposed signal onto a magnetic recording medium, a first separation circuit for separating a horizontal synchronizing signal from the color video signal, and a first frequency-converting signal forming circuit for forming a frequency-converting signal according to the horizontal synchronizing signal separated at the first separation circuit, to supply the separated horizontal synchronizing signal to the first frequency converter.
摘要翻译：彩色视频信号记录和/或再现系统中的记录系统包括用于从彩色视频信号中分离亮度信号的第一滤波器，用于对亮度信号进行频率调制的调制器，用于将载波色度信号与彩色视频信号，用于将载波色度信号的频带转换成低于由调制器的输出亮度信号占据的频率的频带的第一频率转换器，用于叠加频率调制器的输出的叠加电路和第一变频器的输出，另一方面，用于将叠加信号记录到磁记录介质上的记录电路，用于从彩色视频信号中分离水平同步信号的第一分离电路和第一频率转换信号形成电路用于根据水平同步信号形成频率转换信号 g信号在第一分离电路分离，以将分离的水平同步信号提供给第一变频器。

8. 发明授权

US4425584A Video signal recording and/or reproducing system 失效
标题翻译：视频信号记录和/或再现系统
公开(公告)号：US4425584A
公开(公告)日：1984-01-10
申请号：US245663
申请日：1981-03-20
申请人： Akira Hirota , Takashi Uchimi
发明人： Akira Hirota , Takashi Uchimi
IPC分类号： G11B5/58 , G11B21/10 , H04N5/92 , H04N9/79 , H04N9/86 , H04N5/782
CPC分类号： H04N9/86 , H04N5/92 , H04N5/9201
摘要： A video signal recording and/or reproducing system for recording a video signal onto a recording medium and reproducing the video signal from the recording medium comprises a discriminating signal generating circuit for generating a plurality of first discriminating signals respectively having a frequency of 2nf which is 2n times a predetermined frequency f (n is an integer greater than one), and a plurality of second discriminating signals respectively having a frequency of (2n-1)f, a mixing and multiplexing circuit for respectively and alternately changing over the first and second discriminating signals obtained from the discriminating signal generating circuit, every recording unit of one track, and mixing and multiplexing the first and second discriminating signals into the video signal, a recording device for recording the above multiplexed signal obtained from the mixing and multiplexing circuit, onto the recording medium, a reproducing device for reproducing the recorded multiplexed signal from the recording medium, a discriminating and reproducing circuit for discriminating and reproducing the first and second discriminating signals recorded in the reproducing tracks, from the reproduced signals obtained from the reproducing device; a demodulating circuit for obtaining the video signal from the reproduced signal supplied by the reproducing device, and demodulating the video signal thus obtained; and a circuit for using the discriminating signal obtained from the discriminating and reproducing circuit as a pre-established information. The first discriminating signals are recorded on one of the adjacent recording tracks by the recording device, and the second discriminating signals are recorded on the other of the adjacent tracks by the recording device.
摘要翻译：用于将视频信号记录到记录介质上并从记录介质再现视频信号的视频信号记录和/或再现系统包括鉴别信号产生电路，用于产生分别具有2nf频率为2n的频率的多个第一鉴别信号倍数为预定频率f（n为大于1的整数）和分别具有（2n-1）f频率的多个第二鉴别信号，混合和多路复用电路分别交替地改变第一和第二鉴别从识别信号发生电路获得的信号，一个磁道的每个记录单元，并将第一和第二鉴别信号混合和多路复用为视频信号;记录装置，用于将从混合和复用电路获得的上述复用信号记录到记录介质，用于再现所记录的多个的再现装置来自记录介质的码元信号，鉴别和再现电路，用于从再现设备获得的再现信号中鉴别和再现记录在再现轨道中的第一和第二鉴别信号; 解调电路，用于从由再现装置提供的再现信号获得视频信号，并解调由此获得的视频信号; 以及用于使用从识别和再现电路获得的识别信号作为预先建立的信息的电路。第一鉴别信号由记录装置记录在相邻的一个记录道之一上，并且第二鉴别信号由记录装置记录在另一个相邻的轨道上。

9. 发明授权

US4068257A Color video signal recording and/or reproducing system 失效
标题翻译：彩色视频信号记录和/或再现系统
公开(公告)号：US4068257A
公开(公告)日：1978-01-10
申请号：US731424
申请日：1976-10-12
申请人： Akira Hirota , Yoshihiko Ota , Yoshiteru Kosaka
发明人： Akira Hirota , Yoshihiko Ota , Yoshiteru Kosaka
IPC分类号： G11B20/02 , H04N9/793 , H04N9/83 , H04N5/79
CPC分类号： H04N9/793 , H04N9/83
摘要： A color video signal recording system comprises a frequency modulator. A luminance signal is separated from an input color video signal. The amplitude of a color burst signal is intensified after it is separated from the input color video signal. The intensification is with respect to the amplitude of a carrier chrominance signal separated from the input color video signal. An automatic chroma control circuit receives the intensified color burst signal and the non-intensified carrier chrominance signal to effect level control. A specific level is not exceeded. A first frequency converter converts the frequency of the output signal of the automatic chroma control circuit. The converted signal is in a band which is lower than the band of said frequency-modulated luminance signal. The frequency-modulated luminance signal and the resulting output signal of said first frequency converter are mixed and multiplexed. A transducing head records the resulting mixed and multiplexed signal on a recording medium. A color video system reproduces a signal recorded by the above described recording system.The reproducing system comprises a transducing head for reproducing the signal recorded on the recording medium. A demodulator separates the frequency-modulated luminance signal in the reproduced signal. A second frequency converter converts the frequency of the color burst signal and carrier chrominance signal separated from the reproduced signal. The signal is returned into the original frequency band thereby suppressing the amplitude of the color burst signal from the second frequency converter, with respect to the amplitude of the carrier chrominance signal. A demodulating circuit mixes the luminance signal the color burst signal of suppressed amplitude, and the carrier chrominance signal, and derives the resulting signal thus mixed as a reproduced color video signal.
摘要翻译：彩色视频信号记录系统包括频率调制器。亮度信号与输入彩色视频信号分离。在与输入彩色视频信号分离之后，色同步信号的幅度增强。增强是相对于从输入彩色视频信号分离的载波色度信号的幅度。自动色度控制电路接收增强的色同步信号和非强化载波色度信号，以进行电平控制。不超过特定级别。第一变频器转换自动色度控制电路的输出信号的频率。经转换的信号处于低于所述调频亮度信号的频带的频带中。所述第一频率转换器的频率调制亮度信号和所得到的输出信号被混合和多路复用。转换头将所得到的混合和复用信号记录在记录介质上。彩色视频系统再现由上述记录系统记录的信号。

10. 发明授权

US4064537A Amplitude limiting circuit for frequency modulated video signals 失效
标题翻译：用于调频视频信号的幅度限制电路
公开(公告)号：US4064537A
公开(公告)日：1977-12-20
申请号：US704848
申请日：1976-07-13
申请人： Yoshihiko Ota , Akira Hirota
发明人： Yoshihiko Ota , Akira Hirota
IPC分类号： H03G9/18 , H03G11/06 , H04N5/931 , H04N5/94 , H04N5/76
CPC分类号： H04N5/94 , H03G11/06 , H03G9/18 , H04N5/9315
摘要： An amplitude limiting circuit comprises a high-pass filter for passing the high frequency components of a frequency modulated video signal. The centerline of a signal portion has an amplitude width which is non-linear. A first amplitude limiter both limits and amplifies the output signal from the high-pass filter. A low-pass filter passes the low frequency component of the frequency modulated video signal. An adder adds the resulting output signals of the first amplitude limiter and the low-pass filter. A second amplitude limiter limits the resulting output of the adder.
摘要翻译：振幅限制电路包括用于通过调频视频信号的高频分量的高通滤波器。信号部分的中心线具有非线性的幅度宽度。第一限幅器既限制并放大来自高通滤波器的输出信号。低通滤波器通过调频视频信号的低频分量。加法器将所得到的第一限幅器和低通滤波器的输出信号相加。第二个限幅器限制加法器的结果输出。

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