Movie/comic Tony question

[twilight-fang.livejournal.com]

I'm stuck editing the next part to my fic because I'm not sure if I'm referring to the device in Tony's chest properly. In the movie, it's referred to as an arc reactor, but what is it called in the comics? How long has Tony been without it?

I've seen a few older comic covers where Tony is bare chested and doesn't have any sort of device installed/implanted and am now totally confused. @_@

Comments

[cat-13145.livejournal.com]

Could be they're trying to tie in with the movie.

only explaination I've got.