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公开(公告)号：EP0100054A3
公开(公告)日：1986-03-05
申请号：EP83107043
申请日：1983-07-18
Applicant: Matsushita Electric Industrial Co., Ltd.
Inventor： Suzuki, Takashi , Shinohara, Koichi , Odagiri, Masaru , Fujita, Takashi , Kawase, Shigeki
CPC classification number: G11B5/7315 , G11B5/64 , G11B5/84 , H01F41/14 , Y10S428/90 , Y10T428/24355 , Y10T428/24405 , Y10T428/24446 , Y10T428/24975 , Y10T428/24992 , Y10T428/31 , Y10T428/31681
Abstract: A magnetic recording media comprises a polyester substrate having 1000/mm 2 or more protrusions of polyester oligomer, and a ferromagnetic thin film of 400 A or larger thickness formed on the surface of the polyester substrate; the recording media has substantially no squealing even at 30°C and over 80% relative humidity.
Abstract translation: 一种磁记录介质，其特征在于，具有聚酯基板表面具有1000个/ mm 2以上的聚酯低聚物突起和400以上厚度的强磁性薄膜的聚酯基板， 即使在30℃和80％以上的相对湿度下，记录介质也基本上没有尖叫。
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公开(公告)号：EP0094775A3
公开(公告)日：1986-02-12
申请号：EP83302586
申请日：1983-05-09
Applicant: EMI Limited
Inventor： Sansom, David John
CPC classification number: G11B5/3903 , G06K19/12 , G07F7/086 , G11B5/70 , G11B5/852
Abstract: A permanently structured magnetic recording tape (1, Fig.6) includes a pattern of first and second regions of acicular iron oxide particles, the first 'A' regions being orientated at 22.5° (clockwise) to the tapes axis and the second 'B' regions being orientated at 67.5° (clockwise) to the tape axis. A permanent magnet 2 applies a developing field at 45° (anti-clockwise) to the tape axis such that, at the 'transition in orientation direction, the normal components of remanence in 'A' and 'B' regions are in opposite directions, thereby increasing pole strength at the transitions compared with longitudinal development, and enhancing the output signal at the magnetoresistive read-out transducer (P). A second magnetoresistive transducer (R) senses fluctuations in magnetic polarity at the tape edge to verify whether the medium is genuine.
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公开(公告)号：EP0093966A3
公开(公告)日：1986-02-05
申请号：EP83104169
申请日：1983-04-28
Applicant: BASF Aktiengesellschaft
Inventor： Melzer, Milena , Jakusch, Helmut , Grau, Werner, Dr. , Koester, Eberhard, Dr. , Loeser, Werner, Dr. , Polke, Reinhard, Dr. , Schaedel, Guenter, Dr. , Ohlinger, Manfred, Dr. , Vaeth, Guenter
IPC: G11B05/84
CPC classification number: G11B5/84 , G11B5/70663 , Y10S428/906 , Y10T428/25 , Y10T428/256 , Y10T428/257
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44.发明公开
公开(公告)号：EP0094452A3
公开(公告)日：1986-01-02
申请号：EP82111447
申请日：1982-12-10
Applicant: International Business Machines Corporation
Inventor： DePalma, Vincent Michael
IPC: G11B05/84
CPC classification number: G11B5/845
Abstract: A process produces a magnetic recording composition having vertically aligned acicular magnetic particles therein. The particles are dispersed in a curable binder system which is subjected to radiant energy while the particles are vertically aligned by an applied magnetic field to rapidly cure the coating and effectively "freeze" the particles in their vertically aligned orientation. A liquid, curable binder system (12) containing acicular magnetic particles (13) is applied to a substrate (11). The magnetic particles are subjected to a magnetic field by an electromagnet (16) to align the particles vertically. Radiant energy (17) is applied to the surface of the binder system containing the vertically aligned particles to gel the binder system sufficiently to maintain the particles vertical. The method is particularly applicable to a magnetic recording disk to provide perpendicular anisotropy.
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公开(公告)号：EP0078368A3
公开(公告)日：1984-12-05
申请号：EP82107220
申请日：1982-08-10
Applicant: International Business Machines Corporation
Inventor： Peugh, Herbert Vincent , Ward, Albert Wendell
IPC: G11B05/84
CPC classification number: G11B5/842
Abstract: During spin coating of a liquid magnetic dispersion onto a rotating annular substrate (12), a stationary air barrier plate (11A) is positioned closely adjacent the substrate after deposition of the dispersion thereon and during the time the excess dispersion is spun off the substrate. The air barrier plate serves to reduce the rate of solvent evaporation from the dispersion so that the dispersion flows more readily during spin-off to produce a thinner resultant magnetic coating (15).
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Patent Agency Ranking
公开(公告)号：EP0078552A3
公开(公告)日：1984-09-05
申请号：EP82110349
申请日：1982-06-08
Applicant: International Business Machines Corporation
Inventor： Pipkin, David John
Abstract: A wide travelling web is coated on one side thereof by passing the web through an elongated web coating nip in contact with an elongated pool of non-Newtonian coating liquid. The pool is repienished by a conduit manifold having one inlet conduit (34) and four outlet ports (46, 47, 48, 49). The outlet ports communicate directly with the pool. The inlet conduit divides into two branch conduits (40,41) of equal, uniform cross section, one-half that of the inlet conduit, and of equal length. Each branch conduit divides into two branch conduits, each leading to an outlet port. The four branch conduits (42, 43, 44, 45) are of equal, uniform cross section, one half that of each of the two branch conduits, and of equal length. Each of four liquid flow paths through the branch conduits subjects the coating liquid to substantially identical flow rheology because the paths are of substantially equal length and substantially equal fluid shear characteristic.
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47.发明公开
公开(公告)号：EP0049938A3
公开(公告)日：1982-09-08
申请号：EP81302151
申请日：1981-05-14
Applicant: DYSAN CORPORATION
Inventor： James, Richard Negus , Goodale, Kenneth Stewart
CPC classification number: G11B5/845
Abstract: Apparatus and a method for positioning a flexible magnetic recording medium, such as a floppy disk, (12; 112), in such a way as to permit magnetic means (14; 162) on opposed sides of the medium to orient the particles in the magnetic coatings on the medium immediately after the coatings have been applied to the medium and as the medium is rotated. In one embodiment, the apparatus includes stabilizing devices (22) which are located at circumferentially spaced locations about the outer periphery of the medium (12) when the medium is mounted for rotation. Each device comprises a pair of substantially J-shaped, wire-like members (38) arranged to define a gap (46) between which the outer peripheral margin of the medium (12) passes. The J-shaped members (38) can be tubular or solid. If tubular, they can be used direct fluid under pressure onto the opposite sides of the medium as the medium rotates. In a second embodiment, a pair of bowl-shaped members (125,126) are hingedly mounted together and moved into face-to-face relationship with each other but are spaced apart to present an outer peripheral, continuous gap (128) which receives the outer peripheral margin of the medium (112) when the medium is rotatably mounted on one of the bowl-shaped members. Air is directed into the interiors of the bowl-shaped members and then outwardly therefrom through the gap on opposite sides of the medium to provide Venturi effect to keep the outer peripheral margin of the medium centered in the gap and stabilized against deviation out of the plane of rotation of the medium.
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公开(公告)号：EP0119749A3
公开(公告)日：1986-11-12
申请号：EP84301015
申请日：1984-02-16
Applicant: AMPEX CORPORATION
Inventor： Garrison, Marvin C.
CPC classification number: G11B5/858 , Y10S428/90 , Y10T428/265
Abstract: Plated magnetic recording material, such as magnetic tape, composed of a thin layer of ferromagnetic metal and a base film layer are made by plating a passivated smooth continuous surface such as the surface of a cylindrical mandrel or an endless belt with a plate of ferromagnetic metal, applying the base film layer to the plated surface, and stripping the resulting laminated composite from the surface. The smoothness of the surface of the ferromagnetic metal layer depends on the smoothness of the continuous surface rather than on the smoothness of the surface of the base film stock.
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49.发明公开
公开(公告)号：EP0119302A3
公开(公告)日：1986-11-12
申请号：EP83111409
申请日：1983-11-15
Applicant: International Business Machines Corporation
Inventor： Bradshaw, Richard Lionel , Falcone, Samuel John , Simonetti, Alexander
CPC classification number: G11B5/70636 , Y10S428/90
Abstract: A stable, non-agglomerating, magnetic recording coating ink, for use in coating a flexible nonmagnetic substrate, is made by a two-step process which first mixes finely divided chromium dioxide particles with water and a polymeric surfactant/dispersant agent which has as its major functionality in a side chain, carboxylic acid, as a free acid, ester or amide thereof, and of a relatively low number average molecular weight in the range 500 to 20.000. Only after the particles are dispersed in this slurry is water-based polyurethane binder added to the slurry, as the second step in the process, to form the final ink.
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公开(公告)号：EP0129721A3
公开(公告)日：1986-09-10
申请号：EP84105933
申请日：1984-05-25
Applicant: International Business Machines Corporation
Inventor： Ko, Ming , Oxsen, Michael Eugene , Prime, Robert Bruce
CPC classification number: G11B5/842 , G11B5/7028 , G11B5/72 , Y10S428/90 , Y10T428/249978 , Y10T428/24998 , Y10T428/249986 , Y10T428/31609 , Y10T428/31931 , Y10T428/31935
Abstract: @ A method is described of fabricating a magnetic recording element comprising applying a layer of a flowable magnetic material to a substrate, said material comprising magnetic particles dispersed in a curable binder; curing the magnetic material of the applied layer; and thereafter applying a lubricant to the surface of the magnetic layer; said method being characterised by the step of addding a thermally degradable additive to the flowable magnetic material, said additive being degraded during curing of the material and producing a plurality of microvoids in the surface of the layer capable of enhancing retention of the lubricant on said surface. More succinctly there is described a heat curable magnetic coating mixture contains one or more polymeric additives selected to thermally oxidize during coating cure to create a plurality of microvoids in the cured coating as an aid to increase the retention of a lubricant which is applied to the cured coating.
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