HP Designjet 2500.3500cp Printer series - Manual (Page 79)

Working with Media
Unloading Media from the Take Up Reel accessory
3-29
10 Remove the Take Up Core from the Take Up Reel spindle.
To remove roll media from the printer perform the following procedure.
Take Up Core (with media)
Media
guide
Take Up Reel spindle
C472350c