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The Assembly and Sealing of the Head Disk Enclosures of Small Form Factor DASD with Shrink Tubing

IP.com Disclosure Number: IPCOM000110740D
Original Publication Date: 1992-Dec-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 2 page(s) / 74K

Publishing Venue

IBM

Related People

Khanna, VD: AUTHOR [+4]

Abstract

Disclosed is a shape for a head-disk enclosure for small form factor DASD that permits the effective use of heat shrink tubing as a means of fastening and sealing the enclosure.

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The Assembly and Sealing of the Head Disk Enclosures of Small Form Factor DASD with Shrink Tubing

      Disclosed is a shape for a head-disk enclosure for small form
factor DASD that permits the effective use of heat shrink tubing as a
means of fastening and sealing the enclosure.

      In present day DASD the head-disk enclosure consists of two
parts that are assembled together with the use of screws and gaskets
to obtain the necessary rigidity and sealing.  With the continuous
evolution of smaller and smaller form factors, it is becoming
increasingly difficult to provide screws and gaskets of comparable
reduction in size.  In addition, the ever decreasing prices of these
small DASDs mandates the use of an assembly and sealing process of
minimal cost.

      The use of heat shrink tubing has been proposed [1] as a
cost-effective way of achieving the necessary assembly and sealing.
The two halves of the enclosure are assembled together and a
continuous strip of shrink tubing is placed around the joint.  When
the tubing is shrunk, it envelops the two halves and holds them
rigidly in place.  If a suitable adhesive (ideally a flexible
thermoplastic) is applied between the enclosure and shrink tubing, a
hermetic seal can also be achieved.  Fig. 1 illustrates this
principle.

      However, for the shrink tubing to be most effective, the shape
of the enclosure has to be modified from the traditional rectangular
shape to that shown in Fig. 2.  Here all the...