A recently published patent filed by Microsoft describes in detail the hinge mechanism supporting a pop-up dual-surfaced foldable display. The patent also hints towards edge display notifications.
Hinge mechanism RSS
New APIs added in the latest build released to Insiders show Microsoft is adding features enabling its OS to run on devices featuring 360-degree rotation, the most likely candidate being Andromeda.
A new patent filed by Microsoft has been published recently. This gives people a closer look at the hinge mechanism for the company's allegedly upcoming dual-display Andromeda device.