Magnetic recording and reproducing device
First Claim
1. A magnetic recording and reproducing device of the type wherein the tape is transported from one reel mounted on one spindle to the other reel mounted on the other spindle through a tape drive means and a head block so that recording, playback, fast-forward or rewind may be effected, comprising:
- (a) a capstan of constant diameter which rotates at a predetermined constant speed,(b) a rotatable roller,(c) a pair of identical pinch rollers of constant diameter which are disposed symmetrical about the bisector or perpendicular erected at the mid-point of a line connecting the centers of said capstan and rotatable roller and which are selectively pressed against said capstan from the opposite directions, the lines of contact between the pinch rollers and capstan being symmetrically located such that the angle formed between (i) a line connecting the centers of a pinch roller and the capstan and (ii) a line connecting the centers of the capstan and idler roller forms an obtuse angle,(d) spring means for urging said pinch rollers against opposite sides of said capstan with equal force and pressure, so that one pinch roller is caught by the capstan and the other pinch roller releases from the capstan and exhibits a predetermined slip with respect thereto,(e) a head block disposed between said capstan and said roller and including a plurality of heads,(f) a first tape drive provided by said capstan and one of said pinch rollers and a second tape drive provided by said capstan and the other pinch roller,(g) the tape transported by said first tape drive being directed toward said roller, where said tape is re-directed toward said second tape drive which drives said tape toward said the other reel,(h) said tape being brought into contact with the heads in said head block between said first and second tape drives, and(i) the speed imparted to said tape from said first tape drive being slower than the speed imparted to said tape from said second tape drive so that the ratio n between them may be
space="preserve" listing-type="equation">0.997 ≦
n ≦
1.
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Accused Products
Abstract
A magnetic recording and reproducing device comprises a capstan rotatable at a constant speed, a rotatable roller, a pair of pinch rollers disposed symmetrically about the bisector or perpendicular erected at the mid-point of the line connecting the centers of the capstan and roller and movable toward the capstan from the opposite direction to be pressed against the same, a head block disposed between the capstan and roller and including a plurality of heads, the capstan and one of the pinch rollers providing first tape transport or drive means while the capstan and the other pinch roller, a second tape transport means being directed toward the roller at which the tape is redirected to be fed to the second tape transport means, the tape being made into contact with the heads of the head block between the first and second film transport means, and the speed of tape imparted thereto by the first tape transport means being slower than the speed of tape imparted thereto by the second tape transport means.
25 Citations
7 Claims
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1. A magnetic recording and reproducing device of the type wherein the tape is transported from one reel mounted on one spindle to the other reel mounted on the other spindle through a tape drive means and a head block so that recording, playback, fast-forward or rewind may be effected, comprising:
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(a) a capstan of constant diameter which rotates at a predetermined constant speed, (b) a rotatable roller, (c) a pair of identical pinch rollers of constant diameter which are disposed symmetrical about the bisector or perpendicular erected at the mid-point of a line connecting the centers of said capstan and rotatable roller and which are selectively pressed against said capstan from the opposite directions, the lines of contact between the pinch rollers and capstan being symmetrically located such that the angle formed between (i) a line connecting the centers of a pinch roller and the capstan and (ii) a line connecting the centers of the capstan and idler roller forms an obtuse angle, (d) spring means for urging said pinch rollers against opposite sides of said capstan with equal force and pressure, so that one pinch roller is caught by the capstan and the other pinch roller releases from the capstan and exhibits a predetermined slip with respect thereto, (e) a head block disposed between said capstan and said roller and including a plurality of heads, (f) a first tape drive provided by said capstan and one of said pinch rollers and a second tape drive provided by said capstan and the other pinch roller, (g) the tape transported by said first tape drive being directed toward said roller, where said tape is re-directed toward said second tape drive which drives said tape toward said the other reel, (h) said tape being brought into contact with the heads in said head block between said first and second tape drives, and (i) the speed imparted to said tape from said first tape drive being slower than the speed imparted to said tape from said second tape drive so that the ratio n between them may be
space="preserve" listing-type="equation">0.997 ≦
n ≦
1. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification