Scanning long pages
The longest page you can scan is 14 inches (356 mm). (The length is
determined by the Paper Size setting in the HP LaserJet 3100 Scan
Settings dialog.) Although the document feeder tray continues
scanning items longer than 14 inches (356 mm), the JetSuite Pro
Desktop program only keeps the first 14 inches (356 mm) of data on
the page and discards the rest.
If you want to scan an item that is longer than 14 inches (356 mm),
first copy the item onto multiple pages and then scan the copies. See
“Copying long pages” in chapter 5, “Copying.”