Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Casting Seals for Disk Files

IP.com Disclosure Number: IPCOM000102309D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Greaves, HR: AUTHOR [+2]

Abstract

A composite gasket is described for a disk file to seal off the outside atmosphere from the enclosed air flow. It is suitable for high volume assembly under clean room constraints.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Casting Seals for Disk Files

       A composite gasket is described for a disk file to seal
off the outside atmosphere from the enclosed air flow.  It is
suitable for high volume assembly under clean room constraints.

      Referring to the figure, a ridged metal-framed gasket 1 has a
moulded and vulcanized rubber seal 2 bonded to the inside metal face
of gasket 1.  The rubber seal 2 has a greater thickness than the
gasket 1 when uncompressed.  Two machined casting faces 3 and 4
comprise an aperture in the disk file casting 4 and a closure plate 3
which are bolted together via corner holes 5 positioned as shown in
gasket 1. Gasket 1 is trapped between faces 3 and 4.   When fully
bolted down against the metal frame of gasket 1, its rubber seal 2 is
deformed inwards and compressed by the faces 3 and 4, sealing the
enclosure without interfering with the metal-to-metal contact between
1, 3 and 4.

      Typical materials would be aluminum for gasket 1, EPDM rubber
for seal 2 and aluminum for 3 and 4.

      The design has the advantages of ease of assembly, no adhesive
requirements,   and no need for torque-limiting precautions on
clamping bolts.  Also, the metal-to-metal contact between plate 3 and
casting 4 provides an efficient RFI (Radio Frequency Interference)
seal.