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:
May. 23, 1989
Filed:
Jun. 03, 1987
Masanori Kochi, Katsuta, JP;
Juichi Morikawa, Katsuta, JP;
Makoto Ibe, Katsuta, JP;
Toshio Osada, Katsuta, JP;
Hitoshi Takizawa, Katsuta, JP;
Hideyuki Kawase, Katsuta, JP;
Ikuo Nishida, Katsuta, JP;
Eiichi Hanawa, Mito, JP;
Hitoshi Okabe, Hitachi, JP;
Tosio Uno, Mito, JP;
Hitachi Ltd., Tokyo, JP;
Hitachi Video Engineering, Incorp., Tokyo, JP;
Abstract
A rotary magnetic head cylinder device for use in a helical-scanning system video tape recorder has a projection provided on a tape running race of a stationary lower cylinder near a location at which a magnetic tape leaves from the lower cylinder. The projection is preferably integral with the tape running race and has a small area which is defined by a shoulder circumferentially extending identically with a tape guide shoulder contouring the lower edge of the tape running race and which spreads perpendicularly to the tape running race, and an upper surface coplanar with the top face of the lower cylinder, and a height defined by a protruded length radially outwardly toward the outer circumferential surface of the lower cylinder. The projection serves to reduce vibrations of the magnetic tape generated when the video head carried by the rotary upper cylinder leaves from the magnetic tape.