Tape Dispenser may be refilled by removing the pear link from the top of the chain, then pulling the chain from the beads and top of the bagel. The roll of paper may then be replaced, and the beads and bagel are re-strung onto the chain, and re-attach the pear link.
There is no mechanism that would stop the paper from being unrolled without restraint.
Refill paper rolls are available at our bird toy parts site: http://makeyourownbirdtoys.com/Paper-Roll_p_15.html
Thank you for your inquiry! If you have any further questions please let us know.