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:
Feb. 20, 2001
Filed:
Dec. 02, 1998
Albert M. A. Rijckaert, Eindhoven, NL;
Marinus A. H. Looykens, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An apparatus for recording an information signal forming slant tracks (T,) on a magnetic record carrier (,), and for recording a control (CTL) signal forming a longitudinal CTL track (,). At least one write head (,) located on a rotatable head drum (,) writes the information signal on the record carrier to produce the slant tracks, while a CTL write head (,) writes the CTL signal at a specific frequency on the record carrier. In a first recording mode, a portion of the information signal is recorded by the write head (,) to produce a track during each revolution of the head drum on the record carrier, the frequency of the CTL signal being such that an edge in the CTL signal is written in the CTL track for each of the tracks, and the record carrier (,) being transported with a predetermined first speed, and the head drum (,) being rotated with a predetermined rotational velocity. In a second recording mode, the information signal produces a track of information during each n-th revolution of the head drum (,), while the record carrier is transported at a second speed substantially equal to the first speed divided by n, in the second recording mode, and the head drum is rotated at the same predetermined rotational velocity.