Moisture-absorbent element for disk drives

• US 5,734,521 A
• Filed: 07/19/1995
• Issued: 03/31/1998
• Est. Priority Date: 07/29/1994
• Status: Expired due to Fees

• Current Assignee: Hitachi Global Storage Technologies Netherlands BV (Western Digital Corporation)
• Original Assignee: International Business Machines Corporation
• Inventors: Ando, Hiroaki, Fukudome, Yoshihito, Harada, Yoshinao
• Primary Examiner(s): EVANS, JEFFERSON A
• Application Number:
  US08/504,133
• Time in Patent Office: 986 Days
• Field of Search: 360/97.01-98.01, 360/137, 55/385.1, 55/385.6, 55/525, 55/527
• US Class Current: 360/97.03
• CPC Class Codes: G11B 33/1453 by moisture

Abstract

A disk drive having a moisture-absorbent element of compactly folded cloth formed by weaving stainless steel fibers for suppressing the humidity rise in the case accompanying a temperature fall. A disk is housed in an upward open box-shaped case. A magnetic head for writing and reading information on the disk is supported by a head drive. On the top of the case, a cover is fixed by a plurality of screws to nearly seal the interior of the drive. Between the case and the cover is disposed a moisture-absorbent element of compactly folded cloth formed by weaving stainless steel fibers. Held between the bottom of the case and the lower surface of the cover, the moisture-absorbent element is fixed in the drive.

Claims

1. A disk drive apparatus having a disk that serves as a recording medium, comprising:

a substantially sealed case for housing a disk; and

a metal fiber disposed within the case solely for reducing humidity within the case by adsorbing moisture that condenses on the metal fiber.

2. A disk drive apparatus according to claim 1, wherein the metal fiber is stainless steel fiber.

3. A disk drive apparatus according to claim 1, wherein the metal fiber is brass fiber.

4. A disk drive apparatus according to claim 1, wherein said metal fiber forms a woven element which is pleated.

5. A disk drive apparatus according to claim 1, wherein the metal fiber is highly thermoconductive.

6. A disk drive apparatus according to claim 1, wherein the metal fiber is adhesively fixed to the case.

7. A disk drive apparatus according to claim 1, wherein the metal fiber is welded to the case.

a metal fiber disposed within the case solely for reducing humidity within the case by adsorbing moisture that condenses on the metal fiber.

8. A disk drive apparatus, comprising:

at least one disk for recording data thereon;

a case for housing the disk, the case further comprising a base and a cover;

a sealant, disposed between the base and the cover of the case, for preventing moisture from intruding into the case; and

a metal fiber disposed within the case solely for reducing humidity within the case by adsorbing moisture that condenses on the metal fiber.

9. A disk drive apparatus according to claim 8, wherein the metal fiber forms a woven cloth.

10. A disk drive apparatus according to claim 8, wherein the metal fiber is stainless steel fiber.

11. A disk drive apparatus according to claim 8, wherein the metal fiber is brass fiber.

12. A disk drive apparatus according to claim 8, wherein said metal fiber forms a pleated mesh.

13. A disk drive apparatus according to claim 8, wherein the metal fiber is highly thermoconductive.

14. A disk drive apparatus according to claim 13, wherein the high thermoconductivity of the metal fiber allows the metal fiber to track the temperature of the case such that moisture collects on the metal fiber as the temperature decreases.

15. A disk drive apparatus according to claim 8, wherein the metal fiber is adhesively fixed to the case.

16. A disk drive apparatus according to claim 8, wherein the metal fiber is welded to the case.

17. A disk drive apparatus according to claim 8, wherein the diameter of the metal fiber is 12 μ

m and the density is 1000 g/m².

18. A method for suppressing the humidity inside a disk drive case, comprising the steps of:

forming a woven cloth of metal fibers;

placing the woven cloth inside a disk drive case;

sealing the case to prevent moisture from infiltrating the case; and

controlling humidity within the case by condensing moisture on the metal fibers in response to a temperature decrease.

19. The method of claim 18, wherein the metal fibers are stainless steel fibers.

20. The method of claim 18, wherein the metal fibers are brass fibers.

21. The method of claim 18, wherein the step of forming a woven cloth of metal fibers further comprises the step of folding the cloth to form folded pleats.

22. The method of claim 18, wherein the woven cloth is highly thermoconductive.

23. The method of claim 22, further comprising the steps of allowing the metal fibers to track the temperature of the case due to the high conductivity and collecting moisture on the metal fibers as the temperature decreases.

24. The method of claim 18, wherein the step of placing the woven cloth inside the disk drive case further comprises the step of adhesively fixing the woven cloth to the case.

25. The method of claim 18, wherein the step of placing the woven cloth inside the disk drive case further comprises the step of welding the woven cloth to the case.

26. The method of claim 18, wherein the diameter of the metal fiber is 12 μ

m and the density is 1000 g/m².