Abstract: In a rotary printing press, a printing unit cylinder having a printing form with bent ends fastened thereon so as to form a printing form cylinder with a printing form mounted thereon, the bent ends of the printing form being provided with fastening tabs extendable into the interior of lock-up gap sections formed in the printing form cylinder, and webs respectively alternatingly disposed opposite one another being formed on a leading edge and on a trailing edge of the printing form, between the fastening tabs of the printing form, includes a plurality of pockets formed on a circumferential surface of the printing form cylinder, wherein the fastening tabs of the printing form engage, the webs provided between the fastening tabs and formed on the printing-form leading edge and the printing-form trailing edge terminating on generating lines of the printing form cylinder which differ from one another.