Printing press powder removal system

A system for adapting an offset printing press so that excess spray powder may be removed from said offset printing press;

• said printing press having a sheet feeder section for feeding stock sheets through at least one printing unit which receives and prints said sheets;
• a sheet delivery section to transfer printed sheets from a last of said printing units having a powder spraying device for dispensing powder on said printed sheets and a heater for drying said printed sheets while being transferred;
• a sheet discharge section adjacent said sheet delivery section for receiving said discharged sheets from said sheet delivery section;
• said printing press having a length defined generally by said sheet feeder section, at least one printer unit, sheet delivery section, and sheet discharge section being disposed in series;
• and a raised horizontal catwalk platform disposed adjacent an exterior of said printing press along at least a portion of said printing press length for servicing of said printing press, wherein said system comprises:
• at least a first side panel arranged on one side of said sheet discharge section to provide a general containment chamber for removal of powder-laden air from said sheet discharge section;
• a powder removal enclosure section adapted for connection to said containment chamber to receive said powder-laden air for removing said powder from said powder-laden air;
• an air handling unit adapted for being disposed in air flow communication with said containment chamber and said powder removal section to establish an air flow through at least said containment chamber and said powder removal section and to convey said powder-laden air for powder removal and exhaustion of said clean air to ambient.

A system in combination with an offset printing press for removing excess spray powder in said offset printing press;

• said printing press having a sheet feeder section for feeding stock sheets through at least one printing unit which receives and prints said sheets;
• a sheet delivery section to transfer printed sheets from a last of said printing units having a powder spraying device for dispensing powder on said printed sheets and a heater for drying said printed sheets while being transferred;
• a sheet discharge section adjacent said sheet delivery section for receiving said discharged sheets from said sheet delivery section;
• said printing press having a length defined generally by said sheet feeder section, at least one printer unit, sheet delivery section, and sheet discharge section being disposed in series;
• and a raised horizontal catwalk platform disposed adjacent an exterior of said printing press along at least a portion of said printing press length for servicing of said printing press, said system comprising:
• a containment chamber formed within said sheet discharge section to form a general containment for removal of powder-laden air from said sheet discharge section;
• a powder removal section which includes a filter unit located below said horizontal catwalk platform connected to said containment chamber for receiving said powder-laden air and filtering said air;
• said filter unit having at least one main filter disposed downstream of said containment chamber to substantially remove said spray powder from said powder-laden air to provide substantially clean air;
• and
• an air handling unit in air flow communication with said containment chamber and said powder removal section to establish an air flow through at least said containment chamber and said powder removal section for powder removal and exhaustion of said clean air to ambient.

A system in combination with an offset printing press for removing excess spray powder in said offset printing press;

• said printing press having a sheet feeder section for feeding stock sheets through at least one printing unit which receives and prints said sheets;
• a sheet delivery section to transfer printed sheets from a last of said printing units having a powder spraying device for dispensing powder on said printed sheets and a heater for drying said printed sheets while being transferred;
• a sheet discharge section adjacent said sheet delivery section for receiving said discharged sheets from said sheet delivery section;
• said printing press having a length defined generally by said sheet feeder section, at least one printer unit, sheet delivery section, and sheet discharge section being disposed in series;
• and a raised horizontal catwalk platform disposed adjacent an exterior of said printing press along at least a portion of said printing press length for servicing of said printing press, said system comprising:
• a containment chamber formed within said sheet discharge section to provide a general containment for removal of powder-laden air from said sheet discharge section;
• an exhaust vent disposed in said containment chamber for exhausting powder-laden air from said containment chamber;
• a powder removal section connected to said exhaust vent to receive said powder-laden air for removing said spray powder from said powder-laden air and for discharging clean air;
• an air handling unit in air flow communication with said containment chamber and said powder removal section to establish an air flow through said exhaust vent and through said powder removal section for powder removal and exhaustion of said clean air to ambient;
• and
• said exhaust vent being disposed in said containment chamber so that said air flow is established in a downward direction in said containment chamber.