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    METHOD OF COATING A MAGNETIC RECORDING MEDIA COATING ONTO A SUBSTRATE, WHEREIN THE COATING IS SUBSTANTIALLY FREE OF BENARD CELLS
    4.
    发明申请
    METHOD OF COATING A MAGNETIC RECORDING MEDIA COATING ONTO A SUBSTRATE, WHEREIN THE COATING IS SUBSTANTIALLY FREE OF BENARD CELLS 审中-公开
    将磁性记录介质涂覆在基材上的方法，其中涂层基本上不含固体电池

    公开(公告)号：WO1995033260A1

    公开(公告)日：1995-12-07

    申请号：PCT/US1995004905

    申请日：1995-04-20

    Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

    Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  WALLACK, David, A. ,  YAPEL, Robert, A. ,  LUNDBERG, David, J.

    IPC: G11B05/842

    CPC classification number: G11B5/84

    Abstract: A method of depositing a magnetic recording media coating onto a substrate, wherein the coating is substantially free of Benard Cells, the method comprising the steps of: (a) providing a dispersion comprising a polymeric binder, a pigment, and a solvent; (b) coating the dispersion onto a surface of the substrate; (c) drying the dispersion; (d) calculating values comprising mu , beta , and d representing the viscosity, temperature gradient, and wet caliper of the dispersion, respectively; and (e) during the course of carrying out steps (a), (b) and (c), maintaining the ratio beta d / mu below a threshold value sufficient to substantially prevent the formation of Benard Cells in the magnetic recording media coating.

    Abstract translation: 一种将磁记录介质涂层沉积到基底上的方法，其中所述涂层基本上不含贝纳德细胞，所述方法包括以下步骤：（a）提供包含聚合物粘合剂，颜料和溶剂的分散体; （b）将分散体涂布在基材的表面上; （c）干燥分散体; （d）分别计算表示分散体的粘度，温度梯度和湿度厚度的mu，β和d的值; 和（e）在执行步骤（a），（b）和（c）的过程中，保持低于阈值的比率βd 2 /μm，足以基本上防止在磁记录中形成贝纳德细胞 介质涂层。

    FLEXIBLE ADJUSTABLE SMOOTHING BLADE
    5.
    发明申请
    FLEXIBLE ADJUSTABLE SMOOTHING BLADE 审中-公开
    柔性可调平滑叶片

    公开(公告)号：WO1997008690A2

    公开(公告)日：1997-03-06

    申请号：PCT/US1996014023

    申请日：1996-08-28

    Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

    Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  JERRY, Glen, A. ,  KISTLER, Stephan, F. ,  LAM, Joseph, H. ,  STENSTROM, Scott, D.

    IPC: G11B05/842

    CPC classification number: B05C11/041 ,  G11B5/842

    Abstract: An apparatus continuously smoothes a wet coating of magnetizable particles and binder on a moving flexible web (20). A first longitudinal end (26) of a flexible film (28) is held in contact with the wet coating on the substrate (20) and is free to drag against the wet coating. The first longitudinal end (26) is deflected toward the substrate (20) along a line extending transversely between the first and second transverse ends. The amount of deflection is adjusted and varied during coating to adjust the radius of curvature of the deflection of the first longitudinal end (26). A smoothing bar (32) or a cylindrical rod (62, 64), with or without a sharp edge (68), can hold the flexible film (28) in position. The deflection and adjustment can be performed by a screw (46). Alternatively, a cylindrical rod (62, 64) is used by itself.

    Abstract translation: 一种设备在可移动的柔性幅材（20）上连续平滑可磁化颗粒和粘合剂的湿涂层。 柔性膜（28）的第一纵向端（26）与衬底（20）上的湿涂层保持接触，并且可以相对于湿涂层自由地拖动。 第一纵向端部（26）沿着在第一和第二横向端部之间横向延伸的线路朝向基板（20）偏转。 在涂覆期间调节和改变偏转量以调节第一纵向端（26）的偏转的曲率半径。 具有或不具有锋利边缘（68）的平滑杆（32）或圆柱形杆（62,64）可以将柔性膜（28）保持就位。 偏转和调节可以通过螺钉（46）进行。 或者，圆柱形杆（62,64）自身被使用。

    METHOD AND APPARATUS FOR SMOOTHING GRAVURE COATINGS IN THE MANUFACTURE OF MAGNETIC RECORDING TAPE
    6.
    发明申请
    METHOD AND APPARATUS FOR SMOOTHING GRAVURE COATINGS IN THE MANUFACTURE OF MAGNETIC RECORDING TAPE 审中-公开
    在磁记录带制造中平滑涂层的方法和装置

    公开(公告)号：WO1996006429A1

    公开(公告)日：1996-02-29

    申请号：PCT/US1995008588

    申请日：1995-07-11

    Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

    Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  MUNTER, John, D. ,  LEWIS, Donald, M. ,  STENSTROM, Scott, D.

    IPC: G11B05/842

    CPC classification number: G11B5/842 ,  B05C11/028

    Abstract: A wet gravure coating of fine magnetizable particles can be smoothed by a rectangular piece of flexible film (19) that is secured at one end in flat jaws (26a, 26b) of a clamp (20) to leave its opposite end (18) free to drag against the coating, thus causing the flexible film (19) to form an arc between its secured end and the convergence of the flexible film (19) with the wet coating. The jaws also secure a flat plate (21) which has an edge which is transversely convex across the width of the flexible film or a stiff flexible sheet that deflects the arcuate portion of the flexible film (19) toward the coating along a line extending transversely across the full width of the flexible film. The plate (21) can be repositioned during the smoothing to adjust the radius of curvature of the arc in order to correct any defects that may appear in the smoothed coating. When the backing web is wide and is advanced at economically high speeds, the free end of the flexible film can be tensioned so that its trailing edge becomes bowed and in contact with the coating over its full width.

    Abstract translation: 可细的可磁化颗粒的湿式凹版涂层可以通过矩形的柔性膜（19）来平滑，所述柔性膜（19）的一端固定在夹具（20）的平的钳口（26a，26b）中，以使其相对端（18）离开 以阻止涂层，从而使柔性膜（19）在其固化端与柔性膜（19）与湿涂层的会聚之间形成电弧。 钳口还固定平板（21），该平板具有跨过柔性膜的宽度横向凸起的边缘或柔性柔性片，其将柔性膜（19）的弓形部分沿着横向延伸的线偏转到涂层 穿过柔性膜的整个宽度。 在平滑期间可以重新定位板（21）以调整弧的曲率半径，以便校正可能出现在平滑涂层中的任何缺陷。 当背衬纤维网宽并且以经济高速度前进时，柔性膜的自由端可以被张紧，使得其后缘变得弯曲并且在其全宽度上与涂层接触。

    DIFFERENTIAL-SPEED GRAVURE COATING OF MAGNETIZABLE LAYERS IN THE MANUFACTURE OF MAGNETIC RECORDING MEDIA
    7.
    发明申请
    DIFFERENTIAL-SPEED GRAVURE COATING OF MAGNETIZABLE LAYERS IN THE MANUFACTURE OF MAGNETIC RECORDING MEDIA 审中-公开
    磁记录媒体制造中可磁化层的差速扫描涂层

    公开(公告)号：WO1996006430A1

    公开(公告)日：1996-02-29

    申请号：PCT/US1995008681

    申请日：1995-07-11

    Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

    Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  MUNTER, John, D. ,  LEWIS, Donald, M. ,  LAM, Joseph, H. ,  KUCK, Kevin, J. ,  BROST, Michael, J. ,  GEHRKE, Norman, E.

    IPC: G11B05/842

    CPC classification number: B05C1/0856 ,  G11B5/842

    Abstract: A magnetizable layer can be applied to a flexible backing web (14) by gravure coating at high speeds by independently driving the backing web at a speed that is substantially different from the surface speed of the gravure roll (12). Especially high coating speeds have been achieved when the gravure roll (12) rotates oppositely to the direction in which the backing web (14) is advancing. In one embodiment, a nip roll (34) presses the backing web (14) against the backup roll (15, 30), there is a gap between the gravure roll (12) and a backup roll (15, 30), and an idler roll (17) is positioned downstream of the gap to force the backing web (14) into contact with the gravure roll (12) over a short arc. When that backup roll (30) has a hard surface such as metal, its surface can be machined with precision, and that precision can be maintained in spite of exposure to solvent vapors.

    Abstract translation: 通过以与凹版辊（12）的表面速度基本不同的速度独立地驱动背衬纤维网，通过高速凹版涂布，可将可磁化层施加到柔性背衬纤维网（14）上。 当凹版辊（12）与背衬纤维网（14）前进的方向相反地旋转时，已经实现了特别高的涂布速度。 在一个实施例中，压辊（34）将背衬纤维网（14）压靠在支承辊（15,30）上，在凹版辊（12）和支承辊（15,30）之间存在间隙，并且 惰辊（17）位于间隙的下游，以迫使背衬腹板（14）通过短弧与凹版辊（12）接触。 当支撑辊（30）具有诸如金属的硬表面时，其表面可以精确地加工，并且即使暴露于溶剂蒸气也可以保持精度。

    Magnetic disk coating method and apparatus
    8.
    发明公开
    Magnetic disk coating method and apparatus 失效
    磁盘涂装方法和装置

    公开(公告)号：EP0185209A3

    公开(公告)日：1988-01-13

    申请号：EP85114666

    申请日：1985-11-19

    Applicant: International Business Machines Corporation

    Inventor： Hagan, James Aloysius ,  Maloy, James Edward ,  Wilke, Myron Anden Wilhur

    IPC: G11B05/842

    CPC classification number: B05D1/005 ,  G11B5/842

    Abstract: A rigid magnetic disk substrate (18) is spin coated using a closely confining, stationary air barrier adjacent the surface being coated. The coating is applied through a slotted opening in the air barrier which is progressively closed as the coating is applied and completely sealed during the spin-off operation. During the application of the coating, the air barrier is positioned approximately 3,8 mm from the disk substrate surface and prior to spin-off, the barrier is moved to a position 0,6 mm from the coated surface. Further, during the high speed spin-off cycle a high kinematic viscosity gas, such as helium, is introduced into the space between the barrier and the coated surface to establish a laminar flow condition and eliminate spoking of the coated material.

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