Dynamic magnetic information storage or retrieval – Record copying – Contact transfer
Reexamination Certificate
2006-05-30
2006-05-30
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Record copying
Contact transfer
C360S015000, C360S017000
Reexamination Certificate
active
07054081
ABSTRACT:
By bring a master carrier and a slave medium into close contact with uniform force when executing magnetic transfer by applying transfer magnetic field in the state that the master carrier and slave medium is in confronted close contact and received within a holder, inferiority of transfer such as omission of signals is prevented and quality of transfer signals is enhanced.The magnetic transfer apparatus executes magnetic transfer by applying transfer magnetic field by means of a magnetic field applying apparatus5after a master carrier3, 4bearing transfer information and a slave medium2to be transferred are brought into confronted close contact and received within a holder10, wherein said holder10has a substantially circular shape and in particular, the circularity of holder is not less than 98%, wherein the flexural rigidity=Ed3/12 determined by Young's modulus E and thickness d of the holder is in the range of 0.1˜30 kN·m2when the width of close contact area between the slave medium and master carrier is defined as 1 m, and wherein the practical thickness of the holder is not less than 3 mm and not more than 15 mm.
REFERENCES:
patent: 6839192 (2005-01-01), Kamatani
patent: 2001-155336 (2001-06-01), None
patent: 2001-195739 (2001-07-01), None
patent: 2001-307322 (2001-11-01), None
patent: 2002-163823 (2002-06-01), None
Kamatani Akito
Niitsuma Kazuhiro
Nishikawa Masakazu
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