The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 1999
Filed:
Dec. 23, 1996
Fukuyasu Abe, Yokohama, JP;
Kenmei Masuda, Yokohama, JP;
Shinya Fujimori, Yokohama, JP;
Hidekazu Takeda, Hiratsuka, JP;
Atsushi Inoue, Chigasaki, JP;
Yoshiharu Yamashita, Hitachinaka, JP;
Kuniaki Hirayama, Hitachinaka, JP;
Yoshio Uemura, Hitachinaka, JP;
Masahiko Fujishiro, Hitachinaka, JP;
Toshihiko Imachi, Hitachinaka, JP;
Hitachi Ltd., Tokyo, JP;
Abstract
Disclosed in an arrangement to achieve satisfactory head contact by increasing contact face pressure at a head gap and to reduce the change in time of head contact performance in a double azimuth head. Heads in a portion in which a tape is slid are respectively constructed with each head having two different arcs with a radius of curvature R1 in a first area which includes a gap, and with a radius of curvature R2 in a second area which is adjacent to the first area. A transition portion P for transitioning an arc with the radius of curvature R1 and an arc with the radius of curvature R2 is located in the direction of its adjacent head based upon a contact point Q on R1 of a common tangent drawn from an arc forming a periphery of a rotating drum to a circle formed by R1. The relationship between the radiuses of curvature in two areas is set to R1>R2. As the area in which a tape is in contact can be reduced, contact face pressure by the tape on a gap can be increased, satisfactory head contact can be obtained and as a contact area with a tape is wide to some extent, a change in time of contact performance can be reduced.