Half a croissant, on a plate, with a sign in front of it saying '50c'
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Circular Rolling Door

Do I need a summary?
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For reasons beyond my comprehension, nearly every circular door in existence uses hinges. This idea is to put the door on/in a track, and roll it out of the way of the doorway.

Making such a door easy to open and close is a bit tricky, but this *is* the halfbakery.

I say "nearly every," because google found precisely one rolling door, [link], but it's not precisely a widely known to exist architectural feature.

goldbb, Oct 28 2015

Bank with rolling door. https://www.google....e89b98981b1!6m1!1e1
[goldbb, Oct 28 2015]

Old idea! http://biblehub.com/luke/24-2.htm
This Idea may not be original enough. [Vernon, Oct 28 2015]

The rolling rock (Even Gollal) https://he.wikipedi...2%D7%95%D7%9C%D7%9C
[pashute, Nov 01 2015]

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       bigsleep, you mean that if I posted an idea about an dilating door, it wouldn't get marked as WTCTTISITMWIBNIIWR, or something similar?
goldbb, Oct 28 2015

       For a halfbaked version, the door you seek is used in airlocks on Deep Space 9.
lurch, Oct 29 2015

       too much like a revolving door?
travbm, Oct 29 2015

       Not anything at all like a revolving door, [travbm]. Try reading for comprehension this time.
lurch, Nov 01 2015

       You may look into ultrasonic levetation and magnetic levitation. The circular door has a hole that seals up one way and closes another as it rotates.
travbm, Nov 01 2015

       [pash], for some reason your Wikipedia linked page comes out upside-down and back-to-front on my screen.
MaxwellBuchanan, Nov 01 2015

       Must be the Australian localisation.
pocmloc, Nov 01 2015


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