Patent ID: 6606946
Filing Date: 2003-08-19
Classification: B41F,B65H

Abstract:
A sheet-fed offset printing process, which comprises:altering flow relationships in an interior of a housing of a sheet delivery of a sheet-fed printing machine to prevent uncontrolled spread of powder in the housing by: at least one of: extracting powder-laden air from the housing on at least one point along an empty run of a sheet conveying device; and feeding air into the housing from outside the housing on at least one point along the empty run; channeling air flows inside the housing by feeding air not laden with powder into the housing and leading the air not laden with powder into an air flow path along the empty run downstream of the at least one point with respect to a direction of motion of the empty run to transport the air not laden with powder in a direction toward a printing unit of the printing machine by at least one of: a suction effect of the empty run; and at least impeding an inflow of powder-laden air from a region of at least one of a conveying run of the sheet conveying device and a powdering device into the flow path along the empty run.