A display device is described which includes a fluid exchange device mated to
the
display housing. The fluid exchange device makes a fluid tight seal with the display
housing and includes a sealing member which may be perforated by a conduit. The
conduit provides for the flow of fluids into and away from a cavity within the
display device that is used to contain a display medium. The fluid exchange device
provides a fluid tight seal with the housing, and the sealing member reseals itself
upon withdrawal of the conduit from the sealing member.