公开(公告)号：JPS5698757A

公开(公告)日：1981-08-08

申请号：JP18058980

申请日：1980-12-22

Applicant: BASF AG

Inventor： KAARUUYURUGEN RAIMAA ,  DEIITOMARU PUFUEFUAAKORUN ,  EEBAAHARUTO KEESUTAA ,  NORUBAATO KURAIMESU ,  BUIRUHERUMUSU ANDORIISEN ,  HERUBAATO BUAAGUNAA ,  BUERUNAA BUAAGUNAA

IPC: G11B23/04 ,  G11B23/087

公开(公告)号：JPH0419629B2

公开(公告)日：1992-03-31

申请号：JP18058980

申请日：1980-12-22

Applicant: BASF AG

Inventor： KAARUUYURUGEN RAIMAA ,  DEIITOMARU PUFUEFUAAKORUN ,  EEBAAHARUTO KEESUTAA ,  NORUBAATO KURAIMESU ,  UIRUHERUMUSU ANDORIISEN ,  HERUBAATO UAAGUNAA ,  UERUNAA UAAGUNAA

IPC: G11B23/04 ,  G11B23/087

公开(公告)号：JPH031384A

公开(公告)日：1991-01-08

申请号：JP1077190

申请日：1990-01-22

Applicant: BASF AG

Inventor： KAARUUYURUGEN RAIMAA ,  DEIITOMARU PUFUEFUAAKORUN ,  EEBAAHARUTO KEESUTAA ,  NORUBAATO KURAIMESU ,  BUIRUHERUMUSU ANDORIISEN ,  HERUBAATO BUAAGUNAA ,  BUERUNAA BUAAGUNAA

IPC: G11B23/04 ,  G11B23/087

Abstract: PURPOSE: To obtain a tape cassette having high accuracy in tape traveling characteristic and capable of easily changing tapes even by an amateur by engaging a guide device with an accessible tape part. CONSTITUTION: The tape 18 is guided by a tape guide frame 56 and a guide roller 57 on both sides of a tape pressing element 58 respectively, and is stretched across a long notch 52 of a case 43, and hence a tape guide element of a casing 44 can reach behind the tape 18 through this notch. Consequently, the tape does not slip into the inside of the case 43, and this case is inserted into the casing 44 in a simple sequence. Thus, a very good condition for traveling the tape is obtained, and also hangling of the tape cassette is facilitated even for the amateur.

公开(公告)号：JPH0450678B2

公开(公告)日：1992-08-14

申请号：JP1077190

申请日：1990-01-22

Applicant: BASF AG

Inventor： KAARUUYURUGEN RAIMAA ,  DEIITOMARU PUFUEFUAAKORUN ,  EEBAAHARUTO KEESUTAA ,  NORUBAATO KURAIMESU ,  UIRUHERUMUSU ANDORIISEN ,  HERUBAATO UAAGUNAA ,  UERUNAA UAAGUNAA

IPC: G11B23/04 ,  G11B23/087

公开(公告)号：JPS5697176A

公开(公告)日：1981-08-05

申请号：JP17391580

申请日：1980-12-11

Applicant: BASF AG

Inventor： EEBAAHARUTO KEESUTAA ,  YOOAHIMU HATSUKU ,  MANFUREETO SHIYUTOIAABUARUTO

IPC: G11B5/62 ,  C09D5/23 ,  C09D7/12 ,  G06K7/08 ,  G06K19/10 ,  G06K19/12 ,  G07D7/04 ,  G07D7/12 ,  G11B5/00 ,  G11B23/30

Abstract: A process for authenticating recording media which are to be safeguarded against falsification and which possess a layer of exchange-anisotropic magnetic material, by determining the residual recording which is left over, because of the exchange anisotropy of the magnetic material, from a recording of a sequence of signals after exposure of the material to a specific temperature cycle and, subsequently, to a magnetic AC field which decreases to zero, and an apparatus for carrying out the said process.

公开(公告)号：JPS5697175A

公开(公告)日：1981-08-05

申请号：JP17391480

申请日：1980-12-11

Applicant: BASF AG

Inventor： EEBAAHARUTO KEESUTAA ,  YOOAHIMU HATSUKU ,  MANFUREETO SHIYUTOIAABUARUTO

IPC: G06K19/10 ,  G06K7/08 ,  G06K19/12 ,  G07D7/04 ,  G11B5/00 ,  G11B23/30

Abstract: A process for authenticating recording media which are to be safeguarded against falsification and which possess discrete regions of an exchange-anisotropic magnetic material, by comparison of the polarity of a residual magnetization which is left over, because of the exchange anisotropy of the magnetic material, from a predetermined initial magnetization after exposure of the material to a specific temperature cycle and, subsequently, to a magnetic AC field which decreases to zero, with the polarity of a residual magnetization formed in the same way from an opposite initial magnetization, and an apparatus for carrying out the said process.