Adobe ACROBAT READER 7.0 Manual page 182

Outputting accessible text for a braille printer
You can save the text in a PDF document to print on a braille printer. Accessible text can
be imported and printed out as formatted, grade 1 or 2 braille documents by using a braille
translation application. See the documentation included with the braille translator for more
information.
To save a PDF document as accessible text:
1. Choose File > Save As Text.
2. Choose Text (Accessible) from the Format pop-up menu, name the file, and then click OK.