As you know, there is a not a 'Print' feature for articles in KA at this time, so you will need to copy the articles if you want to print them.  I recommend using Snipping Tool (free in Microsoft Word) or Snagit (by TechSmith https://www.techsmith.com/screen-capture.html).  Snagit is well worth its price, can capture anything that you can see on your screen (as small or as large of an area as you want) and using the video capture you can scroll to capture multiple pages.  I have not used but have heard positive things about ShareX (open source).  see https://alternativeto.net/software/snagit/?platform=google-chrome