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:
Jul. 06, 1976
Filed:
Nov. 11, 1974
Toshihiko Chimura, Atsugi, JA;
Hirokimi Iwata, Atsugi, JA;
Sony Corporation, Tokyo, JA;
Abstract
In an apparatus in which a magnetic tape extending between supply and take-up reels is guided in a helical path about at least a portion of the periphery of a guide drum having one or more rotary magnetic heads associated therewith, and the tape is longitudinally driven, during recording and normal reproducing operations, by a capstan and a pinch roller pressed against the capstan with the tape therebetween, so that video signals are recorded and normally reproduced by the rotary heads in parallel record tracks extending obliquely across the tape at an angle determined by the helical path of the tape on the guide drum, the rotational speed of the heads and the speed of longitudinal movement of the tape by the capstan, and in which, for still motion reproducing operation, the pinch roller is moved away from the capstan to halt the driving of the tape thereby and permit the heads to repeatedly reproduce the signals recorded in one of the oblique tracks while scanning along a line that is at an angle to such track so that guard band noises appear in the reproduced signals; a manually actuable device is provided for conveniently shifting the longitudinal position of the tape relative to the circular path of the rotary magnetic heads during such still motion reproducing operation so as to make such guard band noises as inconspicuous as possible when the reproduced signals are displayed as a still motion video picture. Such manually actuable device includes an arm pivoted about the axis of rotation of the support member for the supply reel and being angularly displaceable in opposed directions, and a drive member mounted on the arm for wedge-like engagement with a cylindrical surface on the supply reel support member when the arm is displaced in one direction and for sliding relative to such surface when the arm is displaced in the opposite direction. Further, the drive member is securely held out of engagement with the supply reel support member during fast forward and rewind operations of the apparatus.