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1. 发明授权

EP1150279B1 Recording Head Clogging Detection Method and its Device 有权
标题翻译：的方法和装置，用于检测记录头的污染
公开(公告)号：EP1150279B1
公开(公告)日：2008-09-24
申请号：EP99973156.5
申请日：1999-11-26
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： YOHDA, Hiroshi , HIGASHIONJI, Masaru , ISAKA, Haruo , MUKAE, Hideaki , BABA, Kouhei , UMEE, Kazunori
IPC分类号： G11B5/455 , G11B5/008 , G11B27/36
CPC分类号： G11B27/36 , G11B5/0086 , G11B5/455 , G11B5/53 , G11B15/087 , G11B15/125 , G11B15/1808 , G11B27/34 , G11B2220/90
摘要： A loading detector used for a VTR to check the recording state of a recording head without using the reproducing head. A test signal (5) of a lower frequency than the erasing frequency is recorded before and after an information signal (2) by means of an erasing head (4). Before and after recording the information signal (2) by means of the recording head (3), the test signal (5) is reproduced, the reproduction output is detected by a detecting circuit (10), and the level of the output is compared with a preset level by a comparing circuit (11). When the level is lower than the preset level, a warning is issued from a warning circuit (15), thus preventing a recording failure due to the loading of the head.

2. 发明授权

EP0139008B1 MAGNETIC HEAD 失效
标题翻译：磁头
公开(公告)号：EP0139008B1
公开(公告)日：1990-05-09
申请号：EP84900748.9
申请日：1984-02-09
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： SATOMI, Mitsuo , KUROE, Akio , SAWAI, Eisuke , HIGASHIONJI, Masaru , SAKAKIMA, Hiroshi , KONDO, Kenji
IPC分类号： G11B5/127 , G11B5/147
CPC分类号： G11B5/147
摘要： A magnetic head is constituted by a block composed of a magnetic core made of sputtered amorphous magnetic alloy layers (2a, 2b) formed on a non-magnetic substrate (1), a non-magnetic ceramic layer (4) provided on the sputtered layer (2b), and a non-magnetic substrate (5) bonded to the non-magnetic ceramic layer (4) by a bonding glass layer (6). Since the sputtered amorphous magnetic alloy layer (2b) and the bonding glass layer (6) are isolated from each other by the nonmagnetic ceramic layer (4), the properties of the bonding glass layer (6) are protected and do not change, and so a firm bonding strength is maintained. The amorphous ceramic layer (4) is also firmly bonded to the sputtered layer (2b), so that a highly reliable magnetic head can be realized.
摘要翻译：磁头由在非磁性基片（1）上形成的由溅射非晶态磁性合金层（2a，2b）制成的磁芯构成的块体，设置在溅射层上的非磁性陶瓷层（4）（2b）以及通过粘合玻璃层（6）粘合到非磁性陶瓷层（4）的非磁性基板（5）。由于溅射的非晶态磁性合金层（2b）和接合玻璃层（6）通过非磁性陶瓷层（4）彼此隔离，所以接合玻璃层（6）的特性受到保护并且不会改变，并且所以保持牢固的结合强度。非晶陶瓷层（4）也与溅射层（2b）牢固结合，从而可以实现高度可靠的磁头。

3. 发明公开

EP1150279A1 RECORDING HEAD LOADING DETECTING METHOD AND ITS DEVICE 有权
标题翻译： Verfahren und Vorrichtung zur Detektierung der Verschmutzung eines Aufzeichnungskopfes
公开(公告)号：EP1150279A1
公开(公告)日：2001-10-31
申请号：EP99973156.5
申请日：1999-11-26
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： YOHDA, Hiroshi , HIGASHIONJI, Masaru , ISAKA, Haruo , MUKAE, Hideaki , BABA, Kouhei , UMEE, Kazunori
IPC分类号： G11B5/455
CPC分类号： G11B27/36 , G11B5/0086 , G11B5/455 , G11B5/53 , G11B15/087 , G11B15/125 , G11B15/1808 , G11B27/34 , G11B2220/90
摘要： A clogging detector used for a VTR to check the recording state of a recording head without using the reproducing head. A test signal (5) of a lower frequency than the erasing frequency is recorded before and after an information signal (2) by means of an erasing head (4). Before and after recording the information signal (2) by means of the recording head (3), the test signal (5) is reproduced, the reproduction output is detected by a detecting circuit (10), and the level of the output is compared with a preset level by a comparing circuit (11). When the level is lower than the preset level, a warming is issued from a warming circuit (15), thus preventing a recording failure due to the clogging of the head.
摘要翻译：用于VTR的堵塞检测器来检查记录头的记录状态，而不使用再现头。通过擦除头（4）在信息信号（2）之前和之后记录比擦除频率低的测试信号（5）。在通过记录头（3）记录信息信号（2）之前和之后，再现测试信号（5），由检测电路（10）检测再现输出，并且比较输出电平具有通过比较电路（11）的预设电平。当水位低于预设水平时，从加温回路（15）发出升温，从而防止由于头部堵塞而引起的记录故障。

4. 发明公开

EP0139008A1 MAGNETIC HEAD 失效
标题翻译：磁头。
公开(公告)号：EP0139008A1
公开(公告)日：1985-05-02
申请号：EP84900748.9
申请日：1984-02-09
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： SATOMI, Mitsuo , KUROE, Akio , SAWAI, Eisuke , HIGASHIONJI, Masaru , SAKAKIMA, Hiroshi , KONDO, Kenji
IPC分类号： G11B5/127 , G11B5/147
CPC分类号： G11B5/147
摘要： @ A magnetic head is constituted by a block composed of a magnetic core made of sputtered amorphous magnetic alloy layers (2a,2b) formed on a non-magnetic substrate (1), a non-magnetic ceramic layer (4) provided on the sputtered layer (2b), and a non-magnetic substrate (5) bonded to the non-magnetic ceramic layer (4) by a bonding glass layer (6). Since the sputtered amorphous magnetic alloy layer (2b) and the bonding glass layer (6) are isolated from each other by the non-magnetic ceramic layer (4), the properties of the bonding glass layer (6) are protected and do not change, and so a firm bonding strength is maintained. The amorphous ceramic layer (4) is also firmly bonded to the sputtered layer (2b), so that a highly reliable magnetic head can be realized.

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