Amano CP3000 black ink cartridge ribbon
This is the only ribbon that will work in the CP3000 and CP5000
This is the only ribbon you want to put in the Amano NS5100
You can also get a two color ribbon for the CP5000 - used only to identify late IN punches.
Extended use ribbon, Amano P/N 316353
The CP3000 and NS5100 ship from the factory with this ribbon.
The PIX ribbon will fit, but it will not work reliably with the CP3000 or CP5000
Reason: The ink is different. The machine is actually looking at the shade of the color.
Additionally, the CP3000/CP5000 ribbon comes with a large ink reservouir, which makes the ribbon last several times longer than the standard PIX ribbon.
Unique to the Amano CP3000 top loading time clock: It prints a dense black square to the left of every punch. The machine senses this black square and uses this information to tell it where to print the next line - that's how it prints down on the card and doesn't overprint.
This process uses a lot of ink. The ribbon has an ink supply build-in to the cartridge, that's what the buldge is.
The NS5100 clocks get the same ribbon, it lasts 3x as long as normal time clock ribbons.