What did Adam Smith mean by "putting [the pins] into the paper"? In his famous description of the division of labour:


  One man draws out the wire, another straights it, a third cuts it, a fourth points it, a fifth grinds it at the top for receiving the head; to make the head requires two or three distinct operations; to put it on, is a peculiar business, to whiten the pins is another; it is even a trade by itself to put them into the paper ... 


What did he mean by "put them into the paper"? Was this just some sort of paper packaging for the pins?

(By the way, my understanding is that pins are what we'd today call nails. Please correct me if I am mistaken.)
Alecos is correct that Smith is talking about packaging, but I don't believe that "paper" refers to a paper bag.

Straight pins used to be sold on sheets of paper (usually as sets of a dozen), through which they passed twice, like so:



So by "put them into the paper" Smith means exactly what he said: the pins are put into paper before being sold.