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公开(公告)号：US4696859A
公开(公告)日：1987-09-29
申请号：US834680
申请日：1986-02-28
申请人： Takahito Miyoshi , Nobuo Aoki , Takashi Yoneyama , Akira Kasuga , Toshimitu Okutu , Masaaki Fujiyama , Yasutoshi Okuzawa
发明人： Takahito Miyoshi , Nobuo Aoki , Takashi Yoneyama , Akira Kasuga , Toshimitu Okutu , Masaaki Fujiyama , Yasutoshi Okuzawa
CPC分类号： G11B5/714 , G11B5/71 , Y10S428/90 , Y10T428/25
摘要： A magnetic recording medium comprising a non-magnetic support having coated thereon a magnetic layer, the magnetic layer containing (i) ferromagnetic alloy particles having an average length in the long axis of 0.25 .mu.m or less and (ii) fatty acid components comprising behenic acid in an amount of 20 to 75 wt%, stearic acid in an amount of 10 to 45 wt% and oleic acid in an amount of 10 to 45 wt% based on the total weight of the three fatty acids.
摘要翻译： 一种磁性记录介质，其特征在于，具有涂覆有磁性层的非磁性载体，所述磁性层含有（i）长轴的平均长度为0.25μm以下的铁磁性合金粒子，（ii）包含山嵛酸的脂肪酸成分 20至75重量％的酸，10至45重量％的硬脂酸和基于三个脂肪酸总重量的10至45重量％的油酸。
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公开(公告)号：US4442171A
公开(公告)日：1984-04-10
申请号：US356285
申请日：1982-03-09
申请人： Masami Sato , Goro Akashi , Yasutoshi Okuzawa , Toshimitu Okutu
发明人： Masami Sato , Goro Akashi , Yasutoshi Okuzawa , Toshimitu Okutu
IPC分类号： G11B5/72 , C08J5/16 , C09D101/18 , C09D175/04 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/24521 , Y10T428/26 , Y10T428/265
摘要： A magnetic recording medium comprising a nonmagnetic flexible substrate, a magnetic layer provided on the surface of the substrate and containing ferromagnetic grains dispersed in a binder, and a back layer provided on the back surface of the substrate. The magnetic recording medium has a stiffness (S.sub.TD) of 6.0 or less. The friction coefficient (.mu..sub.B) of the back layer surface with respect to the axial direction of a loading post in a video tape recorder is controlled to satisfy the condition:0.ltoreq..mu..sub.B .ltoreq.0.1S.sub.TD -0.05so as to make the magnetic recording medium highly resistant to damage due to movement in a video tape recorder.
摘要翻译： 一种磁记录介质，包括非磁性柔性基板，设置在基板表面上并包含分散在粘结剂中的铁磁性颗粒的磁性层，以及设置在基板的背面上的背层。 磁记录介质具有6.0或更小的刚度（STD）。 背景层表面相对于录像机中的装载柱的轴向的摩擦系数（μB）被控制为满足以下条件：0≤b≤0.1STD-0.05，以便 使得磁记录介质高度抵抗由于磁带录像机中的移动而造成的损坏。
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公开(公告)号：US4993197A
公开(公告)日：1991-02-19
申请号：US452444
申请日：1989-12-19
IPC分类号： G11B15/60 , G11B23/087 , G11B23/113
CPC分类号： G11B23/113 , G11B15/605 , G11B23/08757
摘要： A magnetic tape cassette having a guide pole which is in sliding contact with the magnetic surface of the tape produced in such a manner as to improve the running characteristics of the tape while being capable of being manufactured at a low cost. A cylindrical stainless steel base member is subjected to a barreling treatment so as to secure fine particles of an inorganic material having a Moh's hardness of greater than 9 to the slide surface of the guide post. Moreover, the surface of the guide pole can be finished by a surface rolling to reduce the number of scratch-like grooves in the slide surface having a depth of more than 0.2 .mu.m and a width of less than 40 .mu.m to less than 11 per millimeter in the sliding direction of the tape.
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公开(公告)号：US4995199A
公开(公告)日：1991-02-26
申请号：US452654
申请日：1989-12-19
IPC分类号： G11B15/60 , G11B23/087 , G11B23/113
CPC分类号： G11B23/113 , G11B15/605 , G11B23/08757
摘要： A magnetic tape cassette having a guide pole which is in sliding contact with the magnetic surface of the tape produced in such a manner as to improve the running characteristics of the tape while being capable of being manufactured at a low cost. A cylindrical stainless steel base member is subjected to a barreling treatment so as to secure fine particles of an inorganic material having a Moh's hardness of greater than 9 to the slide surface of the guide post. Moreover, the surface of the guide pole can be finished by a surface rolling to reduce the number of scratch-like grooves in the slide surface having a depth of more than 0.2 .mu.m and a width of less than 40 .mu.m to less than 11 per millimeter in the sliding direction of the tape.
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公开(公告)号：US4930032A
公开(公告)日：1990-05-29
申请号：US205759
申请日：1988-06-13
IPC分类号： G11B15/60 , G11B23/087 , G11B23/113
CPC分类号： G11B23/113 , G11B15/605 , G11B23/08757
摘要： A magnetic tape cassette having a guide pole which is in sliding contact with the magnetic surface of the tape produced in such a manner as to improve the running characteristics of the tape while being capable of being manufactured at a low cost. A cylindrical stainless steel base member is subjected to a barreling treatment so as to secure fine particles of an inorganic material having a Moh's hardness of greater than 9 to the slide surface of the guide post. Moreover, the surface of the guide pole can be finished by a surface rolling to reduce the number of scratch-like grooves in the slide surface having a depth of more than 0.2 .mu.m and a width of less than 40 .mu.m to less than 11 per millimeter in the sliding direction of the tape.
摘要翻译： 一种磁带盒，其具有与磁带的磁性表面滑动接触的导柱，以便以低成本制造能够改善磁带的运行特性的方式。 对圆筒状的不锈钢基材进行滚筒处理，以确保具有莫氏硬度大于9的无机材料的细颗粒到导柱的滑动表面。 此外，可以通过表面滚动来完成导柱的表面，以减少深度大于0.2μm，宽度小于40μm至小于11的滑动表面中的划痕状凹槽的数量 每毫米在胶带的滑动方向。
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公开(公告)号：US4411966A
公开(公告)日：1983-10-25
申请号：US372686
申请日：1982-04-28
CPC分类号： G11B5/71 , Y10S428/90
摘要： The present invention relates to an improved magnetic recording medium comprising a magnetic recording layer on the surface of a non-magnetic support, in which the magnetic recording layer contains a fatty acid, high viscosity silicone oil and fatty acid ester.
摘要翻译： 本发明涉及一种改进的磁记录介质，其包括在非磁性载体的表面上的磁记录层，其中磁记录层含有脂肪酸，高粘度硅油和脂肪酸酯。
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公开(公告)号：US4444842A
公开(公告)日：1984-04-24
申请号：US358564
申请日：1982-03-16
CPC分类号： G11B5/73 , G11B5/725 , Y10S428/90 , Y10T428/27 , Y10T428/31663
摘要： A magnetic recording medium is disclosed which is comprised of a non-magnetic support base having a magnetic layer on one surface and a silicone oil layer formed on the opposite surface. The silicone oil layer does not produce dropouts and eliminates scraping and therefore eliminates dust particles that collect and build up in the area of the magnetic head. The silicone layer is formed from a silicone-containing compound having a viscosity of at least 6,000 centistokes at 25.degree. C.
摘要翻译： 公开了一种磁记录介质，其包括在一个表面上具有磁性层的非磁性支撑基底和在相对表面上形成的硅油层。 硅油层不会产生脱落并消除刮擦，因此消除了在磁头区域收集和积聚的灰尘颗粒。 硅氧烷层由25℃粘度至少为6,000厘沲的含硅酮化合物形成。
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公开(公告)号：US4696846A
公开(公告)日：1987-09-29
申请号：US891070
申请日：1986-07-31
IPC分类号： G11B5/82 , C09D133/12 , G11B5/72 , G11B5/84 , G11B23/00 , G11B23/033
CPC分类号： G11B5/72 , Y10S428/90 , Y10T428/24322 , Y10T428/24942 , Y10T428/24975
摘要： A method for forming protective layer on a surface portion surrounding the edge of a central aperture of a flexible magnetic disc sheet is described, comprising providing a radiation polymerizable composition on a surface portion surrounding the edge of the central aperture of the flexible magnetic disc sheet by screen printing, and hardening the composition by exposure to radiation; a flexible magnetic disc is also described, wherein a protective layer by the foregoing method is provided, with said protective layer having an inner diameter larger than the diameter of the aperture of the disc sheet and an outer diameter smaller than the diameter of the aperture of a jacket enclosing the disc sheet.
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公开(公告)号：US4578299A
公开(公告)日：1986-03-25
申请号：US633560
申请日：1984-07-23
IPC分类号： G11B5/72 , C09D133/06 , C09D183/04 , G11B5/725 , G11B5/82 , G11B23/00 , G11B23/033
CPC分类号： G11B5/725 , Y10S428/90 , Y10T428/24322 , Y10T428/24802 , Y10T428/265 , Y10T428/31609 , Y10T428/31786
摘要： A flexible magnetic disk sheet is described, including a central circular hole therein, having a protecting layer formed thereon using (a) a compound including one or more atomic group providing lubricity at at least one end of a main chain or a side chain of molecular of the compound and one or more ester bonds of acrylic acid or methacrylic acid at at least one end of a main chain or a side chain of molecule of the compound, and (b) an aromatic ketone, wherein said protective layer is formed on a surface portion surrounding the edge of the central circular hole of a flexible magnetic disk sheet.
摘要翻译： 描述了包括其中的中心圆形孔的柔性磁盘片，其中使用（a）包含一个或多个原子团的化合物在其上形成保护层，所述化合物在分子的主链或侧链的至少一端提供润滑性 的化合物和在化合物的分子的主链或侧链的至少一个末端的丙烯酸或甲基丙烯酸的一个或多个酯键，和（b）芳族酮，其中所述保护层形成在 围绕柔性磁盘片的中心圆孔的边缘的表面部分。
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公开(公告)号：US4652480A
公开(公告)日：1987-03-24
申请号：US670959
申请日：1984-11-13
IPC分类号： C09D163/00 , C09D175/04 , G11B5/72 , G11B5/82 , G11B23/00 , G11B23/02 , G11B23/033
CPC分类号： G11B5/825 , G11B23/0035 , G11B23/0332 , G11B5/72 , Y10S428/90 , Y10T428/24322 , Y10T428/24802 , Y10T428/24967 , Y10T428/24975 , Y10T428/31993
摘要： A flexible disk comprises a flexible disk jacket having a central opening and a disk-like magnetic recording medium having a central opening smaller than the central opening of the flexible disk jacket in diameter. The recording medium is accommodated for rotation in the flexible disk jacket so that their central openings are concentrically positioned and the portion of the recording medium surrounding the central opening is exposed through the central opening of the jacket, thereby giving access thereto. The portion of the recording medium surrounding the central opening is provided with a protective layer on one side thereof and a reinforcement ring on the other side thereof. The protective layer is formed of a composition which contains a compound with at least one unsaturated bond per molecule that is polymerizable by ultraviolet rays, and which has been cured by exposure to ultraviolet rays.
摘要翻译： 柔性盘包括具有中心开口的柔性盘夹套和盘状磁记录介质，其中心开口的直径小于柔性盘夹套的中心开口。 记录介质被容纳在柔性盘套中旋转，使得它们的中心开口同心地定位，并且围绕中心开口的记录介质的部分通过套管的中心开口暴露，从而允许其进入。 围绕中央开口的记录介质的一部分在其一侧设置有保护层，在另一侧设置有加强环。 保护层由含有每分子具有至少一个不饱和键的化合物形成，该化合物可以通过紫外线聚合而被紫外线照射而固化。
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