Printer and extractable module therefor

A printer and a module for supporting a paper roll therefore, the module comprising: a body for housing the roll; a first supporting member for the roll before that the roll is unwound for the printing operation; a second supporting member for the roll, after the roll has been wound at the end of printing operations; and a first engaging member carried by said body and disposable in a first configuration wherein it is coupled with a second engaging member carried by the printer to secure the module on the printer; the first engaging member is further disposable in a second configuration, wherein it is released from the second engaging member to permit the extraction of the module from the printer.