What do you call this type of door ?

[Kevin Hawkins <lists@xxxxxxxxxxxxxxxxx>]

Sounds a bit OT but it's not really..

I have a large wooden door that covers/conceals the front of my Node
'AV' rack.  It hinges on one side and when open will slide back down the
side of the rack in a 3" gap so the door is hidden.  It uses ball
bearing type slides but unfortunately they are not long enough so the
edge of the door protrudes a few inches when open. This stops my
pivoting rack from rotating as it collides. So I need to get a mechanism
for a wider door but am having great difficulty finding out what they
are called.   Smaller versions are often inbuilt into TV cabinets.
Someone I'm sure on here is bound to know, and if they know a supplier
of any larger mechanisms even better...

Cheers Kevin