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Plain carbon steel hub for data storage device
| Details |
Inventors: Hilton, Ronald L.; Laska, Gregory A.; Swanson, John W.; Domonkos, Richard E.;
Assignee: Imation Corp. (Oakdale, MN)
Primary Examiner: Tupper; Robert S.
Assistant Examiner:
Attorney, Agent or Firm: Levinson; Eric D.
A rotating removable data storage device hub, such as a hub for a micro-floppy magnetic data storage disc, that has a core of plain carbon steel and a primary coating. The hub may also include a vapor corrosion inhibiting layer on the primary coating. The plain carbon steel can have about 0.5% or less carbon. The primary coating can be tin, nickel, zinc, chrome, paints, epoxies, epoxy-urethanes, phenolic resins, and combinations thereof. The vapor corrosion inhibiting layer may include an amine to reduce the rate of oxidation of the plain carbon steel core. |
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DETAILED DESCRIPTION The present invention provides a rotating removable data storage device having a hub of coated plain carbon steel.
By using plain carbon steel for the hub a number of advantages are achieved by the present invention.
The magnetic force generated between the drive spindle and the hub is typically increased, resulting in fewer mischucks.
Also, the cost of the hubs is reduced because of the substitution of plain carbon steel for the stainless steel typically used.
A coating over the plain carbon steel resists corrosion of the plain carbon steel hub and may also assist in preventing improper seating of the hub on the drive spindle.
Additional vapor corrosion inhibiting layers may also improve the corrosion resistance for the coated plain carbon steel hubs.
In one aspect, the present invention provides a hub for a rotating removable data storage device having a core of plain carbon steel and a coating on at least a portion of the core.
Preferably, the plain carbon steel comprises about 0.
5% or less carbon, more preferably about 0.
2% or less carbon.
Some preferred coatings can be selected from the group consisting of tin, nickel, zinc, chrome, paints, epoxies, epoxy-urethanes, phenolic resins, and combinations thereof.
One hub according to the present invention is provided in a microfloppy magnetic data storage disc.
In another aspect, the present invention comprises a micro-floppy magnetic data storage disc having a hub with a core of plain carbon steel and a coating on at least a portion of the hub.
Preferably, the plain carbon steel comprises about 0.
5% or less carbon, more preferably about 0.
2% or less carbon.
Some preferred coatings can be selected from the group consisting of tin, nickel, zinc, chrome, paints, epoxies, epoxy-urethanes, phenolic resins, and combinations thereof.
In another aspect, the present invention comprises a hub for a rotating removable data storage device including a core comprising plain carbon steel; a primary coating on at least a portion of the core; and a vapor corrosion inhibiting layer on the primary coating
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