Answer:
By issuing additional paper receipts, goldsmiths made loans to people who did not necessarily have gold deposits
Explanation:
By issuing additional recipients on a paper, even people who had no gold deposit could reserve amount and get a loan. The gold itself was rarely taken as a loan, or it was taken in a small amount. Rather than taking it, the piece of paper issued by a Goldsmith - a recipient - was enough to ensure someone that fraction claim exists.
This is a method today practice by many banks and it is known by the name "fractional reserve banking".