Magnetic tape head with limited ranges of tape wrap angle and distance between first and second edges

• US 8,310,783 B2
• Filed: 01/10/2008
• Issued: 11/13/2012
• Est. Priority Date: 01/12/2007
• Status: Expired due to Fees

• Current Assignee: Hitachi Maxell Limited (Maxell, Ltd.)
• Original Assignee: Hitachi Maxell Limited (Maxell, Ltd.)
• Inventors: Kawakami, Shinji, Kawakita, Toshio, Kuse, Sadamu
• Primary Examiner(s): Watko, Julie Anne
• Application Number:
  US11/972,441
• Publication Number:
  US 20080170328A1
• Time in Patent Office: 1,769 Days
• Field of Search: 360/231, 360/122
• US Class Current: 360/122
• CPC Class Codes: G11B 5/00821 using stationary heads
• CPC Class Codes: G11B 5/1872 for improving the form of the electrical signal transduced, e.g. compensation of "contour effect"

Abstract

The present invention provides a magnetic head that can sustain favorable head contact even when magnetic tapes having different thicknesses are used. A magnetic head has a sliding surface coming in contact with a moving magnetic tape. An electromagnetic transducing element is disposed in the sliding surface. First edges are formed at each end of the sliding surface in the direction of movement of the magnetic tape. Second edges are formed in positions extended in the direction of movement of the magnetic tape from each end of the sliding surface and come in contact with the magnetic tape.

Claims

1. A magnetic head having a sliding surface coming in contact with a moving magnetic tape, wherein an electromagnetic transducing element is disposed in the sliding surface, the magnetic head comprising:

first edges formed at each end of the sliding surface in the direction of movement of the magnetic tape;

second edges formed in positions extended in the direction of movement of the magnetic tape from each end of the sliding surface, the second edges coming in contact with the magnetic tape;

wherein an angle formed by a straight line connecting one of the first edges to a corresponding one of the second edges and a tangent to the sliding surface at the first edge is not less than 0.1° and

not more than 0.4°

; and

wherein the distance between one of the first edges and a corresponding one of the second edges in the direction of movement of the magnetic tape is not less than 30 μ

m and not more than 300 μ

m.

2. The magnetic head according to claim 1, wherein the distance between one of the first edges and a corresponding one of the second edges in the direction of movement of the magnetic tape is not less than 20 μ

m.