Patent ID: 7207265

Claim:
A sheet turning device for a sheet-fed rotary printing machine, comprising: a storage drum for handling at least two sheets and having at least one holding device for each of the sheets, a circumferential surface, at least one open-edged recess formed therein, at least one inner chamber formed therein, and at least one passage formed therein and connecting said inner chamber of said storage drum to said circumferential surface; and a turning drum disposed downstream of said storage drum and having at least one holding device for engaging a rear edge of a sheet of the sheets to be turned, an operation of detaching the sheet to be turned from said storage drum and carrying it along by said turning drum leads to a formation of a pressure reduction in a reduced-pressure area formed between the sheet to be turned, said storage drum and said turning drum, and causes air from said inner chamber via said passage to be introduced through said open-edged recess into the reduced-pressure area.