The default action of any scanner is to produce an image, normally a JPEG file.
If you want to convert this into text you need to use some sort of OCR (Optical Character Recognition) software. It can be done in MS Word with OCR installed and I imagine it can be done in Adobe Acrobat, but not in the reader. You would probably need the full power version which is expensive.
I gave up on Adobe Acrobat as a reader because of the on-going security problems with it and now use Tracker's PDF Viewer. A quick look at its controls suggests that it has some OCR capability. I have never tried using it for this - until I saw your topic I hadn't even looked for it ! - so I have no idea if it would work for what you want but you can probably find a version that may be free and is in any case likely to be cheaper than Adobe Acrobat !
The way OCR works is that you start the scanner from the application that you wish the document to end up in. Once it has scanned it you will find yourself going through an editing routine where you check the accuracy of the OCR both for word recognition and formatting. Most OCR 'learns' as it goes along but it can be tiresome when you first start using it.
Just had a quick look at their web-site. If it is of interest, I see that prices for OCR capable versions start at $US 43
Edited by Chris Cosgrove, 02 February 2015 - 08:22 PM.