The 28-year-old New Zealand international has penned an emergency loan deal until January 22 with a view to making a permanent switch to Portman Road.
Argyle boss Peter Reid said: "We'll be actively seeking a replacement, but I was pleased with the way Rory Patterson has been playing and I've got Joe Mason as well.
"It's a great opportunity for the boy and I'm sure he'll thrive in the Championship environment."
Source: PA
Source: PA