All this does is read the entire contents of your input
file into $regel in one fell swoop. It should still
have the newlines in it that it had originally, and
in any case how you do your input shouldn't have any
impact on newlines that you explicitely insert in
your output. I'd say that's not your problem. Maybe
you should post the whole script here.
Maybe Notepad is part of the issue. What happens if
you look at the file in another editor (UltraEdit or
whatever, or even EDIT.COM) or pull up a command prompt and use the
TYPE command to display it?