Do I understand you correctly?
Your Mint machine can see all the printers on the network but your Kubuntu machine cannot?
And you want to know what package in Mint makes that possible so you can install it in Kubuntu?
I'm no expert on Kubuntu ( or Mint either
) but I would think that at that level they are identical.
Maybe it's not a missing package in Kubuntu maybe it's the Kubuntu firewall - just guessing.
Open a terminal ( konsole ? ) in Kubuntu and type smbtree
What you should get is something that looks like this:
\\MACH1 mach1 server (Samba, Ubuntu)
\\MACH1\HP970 HEWLETT-PACKARD DESKJET 970C
\\MACH1\HP970F HEWLETT-PACKARD DESKJET 970C
\\MACH1\Print_to_PDF Print to a PDF File
\\MACH1\IPC$ IPC Service (mach1 server (Samba, Ubuntu))
\\MACH1\print$ Printer Drivers
It should show you all of your shares and all of the printers on your network. If not it should show error messages.