How Do You Load Paper In Casio Calculator Hr-8b?

Slide off the upper cover of the calculator, and cut across the paper roll to form a clean end.
If you are mounting the roll externally (outside of the back of the calculator), then look for a slot in the rear of the calculator, which will accept the paper. Feed the end of the paper through the rear slot, and then into the internal feed slot, and hold the [FEED] key. After that, you can flip the arm back to mount the roll and replace the upper cover.
If you want to place the roll inside of the calculator, then you need to feed from the bottom of the roll into the internal feed slot, and hold the [FEED] key. After you are finished, replace the upper cover.
Although this procedure is for the HR-8TE

See other suggested solution here: http://www.fixya.com/support/t12341593-load_paper_in_casio_printing_calculator

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Hope that is helpful.
Kervz at www.satechhelp.co.za