公开(公告)号：US5247501A

公开(公告)日：1993-09-21

申请号：US472820

申请日：1990-01-31

Applicant: Minoru Hashimoto ,  Hiroshi Oinoue ,  Takeo Tamura

Inventor： Minoru Hashimoto ,  Hiroshi Oinoue ,  Takeo Tamura

IPC: G11B7/095 ,  G11B7/09 ,  G11B7/13

CPC classification number: G11B7/0901 ,  G11B7/13

Abstract: A recording and/or reproducing apparatus for from an optical disk includes a tracking error signal forming device for forming a tracking error signal by taking the difference of detection output signals from at least a pair of light beam detectors provided in an optical pickup having an actuator for shifting an objective lens in a focusing direction or in a tracking direction. Also provided is, a tracking servo device for moving the objective lens in the tracking direction on the basis of the output signal from the tracking error signal forming device to effect a tracking servo, a period detection device for detecting whether the period of a tracking servo indicating a relative movement between a track on an optical disk and a light beam from the optical disk is not more than a predetermined value, and a d.c. component switching device for switching the gain of an amplifier stage stepwise, with the amplifier stage being adapted for amplifying a detection output signal of one of at least a pair of light beam detectors and supplying the amplified signal to the tracking error signal forming device. An offset eliminating device controls the d.c. component switching device to effect switching of the gain of the amplifier stage stepwise to produce compensation data compensating the offset of the tracking error signal, only when the detection output from the period detection means indicates that the traverse signal is not more than a predetermined value, with the tracking servo means being off.

公开(公告)号：US5035366A

公开(公告)日：1991-07-30

申请号：US511977

申请日：1990-04-17

Applicant: Minoru Hashimoto ,  Haruyoshi Migita

Inventor： Minoru Hashimoto ,  Haruyoshi Migita

IPC: B02C18/06 ,  B02C18/00 ,  B02C23/04

CPC classification number: B02C18/0007 ,  B02C2018/0023 ,  B02C2018/0046

Abstract: A paper shredder is provided not only with cutters for cutting paper, a driver for driving the cutters and a power source for the driver, but also with a service power outlet from which power can be supplied to an external electrical equipment such as a vacuum cleaner. A door is provided to cover the outlet such that the driver can be operated only while the door is closed and cannot be switched on if the door stays open.

Abstract translation: 切纸机不仅提供用于切割纸的切割器，用于驱动切割器的驱动器和用于驱动器的电源，而且还提供了可以向外部电气设备（例如真空吸尘器）供电的服务电源插座 。 提供一个门以覆盖出口，使得驾驶员只能在门关闭时才能操作，并且如果门保持打开则不能接通驾驶员。

公开(公告)号：US4714654A

公开(公告)日：1987-12-22

申请号：US683582

申请日：1984-12-19

Applicant: Takeo Ito ,  Hajime Takeuchi ,  Minoru Hashimoto ,  Tatsumi Maeda

Inventor： Takeo Ito ,  Hajime Takeuchi ,  Minoru Hashimoto ,  Tatsumi Maeda

IPC: G11B5/706 ,  G11B5/714 ,  C04B35/26 ,  G11B5/68 ,  G11B5/70

CPC classification number: G11B5/714 ,  G11B5/70678 ,  Y10S428/90 ,  Y10T428/256

Abstract: A magnetic recording medium in which a hexagonal crystalline system ferromagnetic powder having a specific surface area of 25 to 50 m.sup.2 /g is dispersed in a resinous binder is suitable for high-density recording which is low in noise and is excellent in orientation properties.

Abstract translation: 具有比表面积为25〜50m2 / g的六方晶系铁磁性粉末分散在树脂粘合剂中的磁记录介质适用于噪声低，取向性优异的高密度记录。

公开(公告)号：US4695513A

公开(公告)日：1987-09-22

申请号：US929364

申请日：1986-11-12

Applicant: Minoru Hashimoto ,  Hajime Takeuchi ,  Takeo Itoh

Inventor： Minoru Hashimoto ,  Hajime Takeuchi ,  Takeo Itoh

IPC: C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

CPC classification number: G11B5/7022 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/31609 ,  Y10T428/31935

Abstract: There is disclosed a magnetic recording medium wherein a magnetic powder is uniformly dispersed in a curable substance of a binder resin material comprising a vinyl chloride-vinyl acetate series resin and/or a polyurethane series resin, at least one of which having a B value in a following apparent viscosity equation:log .eta.a=Bx+log [.eta.]wherein .eta.a is an apparent viscosity (cP) at a temperature of 25.degree. C., x is a resin concentration (wt %(), [.eta.] is a limiting viscosity (cP) at a temperature of 25.degree. C. and B is a constant, of 10 or less, which is measured by dissolving the resin in a mixed solvent of equal weights of methyl ethyl ketone toluene and cyclohexanone; and the B value of the mixed binder resin being 11 or less.The magnetic recording medium of the present invention is the high density recording medium having the great rectangular ratio and excellent in the noise properties.

Abstract translation: 公开了一种磁性记录介质，其中磁性粉末均匀分散在包含氯乙烯 - 乙酸乙烯酯系树脂和/或聚氨酯系树脂的粘合剂树脂材料的固化物质中，其中至少一种B值在 以下表观粘度方程：log eta a = Bx + logη其中ηa是在25℃的温度下的表观粘度（cP），x是树脂浓度（wt％（），η是 在25℃的温度下的极限粘度（cP）为B，常数为10以下，通过将树脂溶解在等重量的甲基乙基甲苯和环己酮的混合溶剂中而测定; B 混合粘合剂树脂的值为11以下。本发明的磁记录介质是具有大矩形比和噪声特性优异的高密度记录介质。