Error prevention in a recording and reproducing device with at least one rotating head

• US 5,067,035 A
• Filed: 03/17/1989
• Issued: 11/19/1991
• Est. Priority Date: 05/22/1987
• Status: Expired due to Fees

• Current Assignee: Kudelski SA
• Original Assignee: Kudelski SA
• Inventors: Rosselet, Ernest, Kudelski, Stefan, Schlup, Jean-Claude
• Primary Examiner(s): Wolff, John H.
• Application Number:
  US07/314,063
• Time in Patent Office: 977 Days
• Field of Search: 360/84, 360/65, 360/95
• US Class Current: 360/85
• CPC Class Codes: G11B 15/125 conditioned by the operating function of the apparatus
• CPC Class Codes: G11B 15/1875 adaptations for special effects or editing signal processing or indexing therefor G11B27/00
• CPC Class Codes: G11B 15/29 through pinch-rollers or tape rollsG11B15/295 takes precedence
• CPC Class Codes: G11B 15/602 for track selection, acquisition or following
• CPC Class Codes: G11B 15/61 on drum, e.g. drum containing rotating heads G11B15/66 takes precedence
• CPC Class Codes: G11B 15/6656 using two-sided extraction, i.e. "M-type"
• CPC Class Codes: G11B 25/063 using tape inside container
• CPC Class Codes: G11B 5/531 Disposition of more than one recording or reproducing head on support rotating cyclically around an axis
• CPC Class Codes: G11B 5/534 inclined relative to the direction of movement of the tape, e.g. for helicoidal scanning
• CPC Class Codes: G11B 5/56 with provision for moving the head support for the purpose of adjusting the position of the head relative to the record carrier, e.g. manual adjustment for azimuth correction or track centering G11B5/52, G11B5/54, G11B5/58 take precedence

Abstract

A recorder/reproducer having two capstans which engage a magnetic tape passing from a delivering coil holder to a receiving coil holder of a cartridge is disclosed. At the time of loading the tape, the capstans are shifted from a rest position along a path toward the scanner which has an upper, rotatable drum. In this working position, the capstans are in close proximity to the scanner which eliminates the great lengths of the tape which generate undesired longitudinal vibrations in the tape.

Claims

1. A device for recording/reproducing signals comprising at least one rotatable head for recording/reproducing said signals by helical scanning, comprising:

a flexible support having a plurality of tracks on which said signals are recorded/reproduced by said rotatable head;

a scanner with a rotatable drum bearing said at least one head, said flexible support being wound and shifted helically around said rotatable drum, said scanner further comprising a stationary drum bearing a helical ramp for laterally guiding said flexible support during its helical shifting around said rotatable drum; and

said device further comprising means for producing a resilient deformation of said stationary drum to enable modification of the step and angle of the helix of the helical ramp to correct for errors in the scanning of said tracks due to a modification of the moving speed of said flexible support.

2. A device according to claim 1, further comprising capstans and means for adjusting the inclination of the axis of said capstans relative to the axis of said scanner to thereby optimally adjust the geometry of the motion of said flexible support.

3. A recording/reproducing device according to claim 1, wherein said at least one rotatable head comprises

a plurality of rotatable heads capable of recording at a plurality of speeds on said flexible support;

said device further comprising means for selectively activating said heads in a preferred order; and

means for axially shifting said heads before recording on said flexible support, wherein the amount of axial shift corresponds to the recording speed to enable the path of said heads to coincide with one of said tracks on said flexible support to enable recording at speeds having a relative mutual separation smaller than octaves.