Tension controller of magnetic tape

• US 20040129818A1
• Filed: 12/18/2003
• Published: 07/08/2004
• Est. Priority Date: 12/26/2002
• Status: Abandoned Application

• Current Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Sugawara, Shinichi, Nishida, Tetsuji
• Application Number:
  US10/738,095
• Publication Number:
  US 20040129818A1
• Time in Patent Office: Days
• US Class Current: 242/334.6
• CPC Class Codes: G11B 15/093 by sensing driving condition of record carrier, e.g. travel, tape tension
• CPC Class Codes: G11B 15/43 Control or regulation of mechanical tension of record carrier, e.g. tape tension

Abstract

A tension controller of a magnetic tape to control a tension distribution in a tape width direction of a running magnetic tape to become uniform is equipped with a tension detecting unit detecting the tension distribution in the tape width direction of the magnetic tape; a tension adjusting unit pushing a weaker portion in tension in the tape width direction of the magnetic tape, and eliminating a tension difference in the tape width direction; and a control unit controlling the tension adjusting unit so that the tension in the tape width direction of the magnetic tape becomes uniform, based on a detection result of the tension detecting unit.

Claims

1. A tension controller of a magnetic tape to control a tension distribution in a tape width direction of a running magnetic tape to become uniform, the controller comprising:

a tension detecting unit detecting the tension distribution in the tape width direction of said magnetic tape;

a tension adjusting unit pushing a weaker portion in tension in the tape width direction of said magnetic tape, and eliminating a tension difference in the tape width direction; and

a control unit controlling said tension adjusting unit so that the tension in the tape width direction of said magnetic tape becomes uniform, based on a detection result of said tension detecting unit.

2. A tension controller of a magnetic tape according to claim 1, wherein said tension detecting unit has a plurality of rollers disposed in a row in the tape width direction of said magnetic tape, disc springs universally rotationally supporting said rollers at top ends, respectively, a support platform fixedly supporting base ends of the disc springs, and strain gauges pasted on said disc springs, and disposes said rollers so as to contact a surface of said magnetic tape.

3. A tension controller of a magnetic tape according to claim 1, wherein said tension detecting unit has two rollers disposed in a row in the tape width direction of said magnetic tape, disc springs universally rotationally supporting said rollers at top ends, respectively, a support platform fixedly supporting base ends of the disc springs, and strain gauges pasted on said disc springs, and disposes said rollers so as to contact a surface of said magnetic tape.

4. A tension controller of a magnetic tape according to claim 1, wherein said tension adjusting unit has a plurality of rollers disposed in a row in the tape width direction of said magnetic tape, support units universally rotationally supporting said rollers, respectively, and a move mechanism giving pushing force to said rollers by moving said support units, and disposes said rollers so as to contact a surface of said magnetic tape.

5. A tension controller of a magnetic tape according to claim 2, wherein said tension adjusting unit has a plurality of rollers disposed in a row in the tape width direction of said magnetic tape, support units universally rotationally supporting said rollers, respectively, and a move mechanism giving pushing force to said rollers by moving said support units, and disposes said rollers so as to contact a surface of said magnetic tape.

6. A tension controller of a magnetic tape according to claim 1, wherein said tension adjusting unit has two rollers disposed in a row in the tape width direction of said magnetic tape, support units universally rotationally supporting said rollers, respectively, and a move mechanism giving pushing force to said rollers by moving said support units, and disposes said rollers so as to contact a surface of said magnetic tape.

7. A tension controller of a magnetic tape according to claim 3, wherein said tension adjusting unit has two rollers disposed in a row in the tape width direction of said magnetic tape, support units universally rotationally supporting said rollers, respectively, and a move mechanism giving pushing force to said rollers by moving said support units, and disposes said rollers so as to contact a surface of said magnetic tape.

8. A tension controller of a magnetic tape according to claim 1, wherein said control unit is composed so as to control a portion on which said tension adjusting unit pushes said magnetic tape and pushing force then, based on a detection result of said tension detecting unit.

9. A tension controller of a magnetic tape according to claim 2, wherein said control unit is composed so as to control a portion on which said tension adjusting unit pushes said magnetic tape and pushing force then, based on a detection result of said tension detecting unit.

10. A tension controller of a magnetic tape according to claim 3, wherein said control unit is composed so as to control a portion on which said tension adjusting unit pushes said magnetic tape and pushing force then, based on a detection result of said tension detecting unit.

11. A tension controller of a magnetic tape according to claim 4, wherein said control unit is composed so as to control a portion on which said tension adjusting unit pushes said magnetic tape and pushing force then, based on a detection result of said tension detecting unit.

12. A tension controller of a magnetic tape according to claim 5, wherein said control unit is composed so as to control a portion on which said tension adjusting unit pushes said magnetic tape and pushing force then, based on a detection result of said tension detecting unit.

13. A tension controller of a magnetic tape according to claim 6, wherein said control unit is composed so as to control a portion on which said tension adjusting unit pushes said magnetic tape and pushing force then, based on a detection result of said tension detecting unit.

14. A tension controller of a magnetic tape according to claim 7, wherein said control unit is composed so as to control a portion on which said tension adjusting unit pushes said magnetic tape and pushing force then, based on a detection result of said tension detecting unit.

15. A tension controller of an optical tape to control a tension distribution in a tape width direction of a running optical tape to become uniform, the controller comprising:

a tension detecting unit detecting the tension distribution in the tape width direction of said optical tape;

a tension adjusting unit pushing a weaker portion in tension in the tape width direction of said optical tape, and eliminating a tension difference in the tape width direction; and

a control unit controlling said tension adjusting unit so that the tension in the tape width direction of said optical tape becomes uniform, based on a detection result of said tension detecting unit.

16. A tension controller of an optical tape according to claim 15, wherein said tension detecting unit has a plurality of rollers disposed in a row in the tape width direction of said optical tape, disc springs universally rotationally supporting said rollers at top ends, respectively, a support platform fixedly supporting base ends of the disc springs, and strain gauges pasted on said disc springs, and disposes said rollers so as to contact a surface of said optical tape.

17. A tension controller of an optical tape according to claim 15, wherein said tension detecting unit has two rollers disposed in a row in the tape width direction of said optical tape, disc springs universally rotationally supporting said rollers at top ends, respectively, a support platform fixedly supporting base ends of the disc springs, and strain gauges pasted on said disc springs, and disposes said rollers so as to contact a surface of said optical tape.

18. A tension controller of an optical tape according to claim 15, wherein said tension adjusting unit has a plurality of rollers disposed in a row in the tape width direction of said optical tape, support units universally rotationally supporting said rollers, respectively, and a move mechanism giving pushing force to said rollers by moving said support units, and disposes said rollers so as to contact a surface of said optical tape.

19. A tension controller of an optical tape according to claim 16, wherein said tension adjusting unit has a plurality of rollers disposed in a row in the tape width direction of said optical tape, support units universally rotationally supporting said rollers, respectively, and a move mechanism giving pushing force to said rollers by moving said support units, and disposes said rollers so as to contact a surface of said optical tape.

20. A tension controller of an optical tape according to claim 15, wherein said tension adjusting unit has two rollers disposed in a row in the tape width direction of said optical tape, support units universally rotationally supporting said rollers, respectively, and a move mechanism giving pushing force to said rollers by moving said support units, and disposes said rollers so as to contact a surface of said optical tape.