Patent ID: 6612566
Filing Date: 2003-09-02
Classification: B65H,G03G

Abstract:
A method of high speed sheet printing with a single high speed print engine having a sheet output path in which closely spaced apart printed sheets printed by said single high speed print engine are sequentially fed downstream at an established high velocity in said sheet output path in a desired sheet sequence from said single high speed print engine,in which a cooperative dual inverter system comprising at least two cooperatively operated but independent sheet inverters mounted in sheet receiving communication with said same sheet output path, both of which sheet inverters have sheet input and sheet output connections with said sheet output path, selectably directing selected ones of said closely sequentially spaced apart printed sheets from said sheet output path into and out of said two independent sheet inverters via said respective sheet input and sheet output connections with said same sheet output path at spaced apart positions along said sheet path, to invert alternate said sheets in both of said two independent sheet inverters in time-overlapping operations of said two independent sheet inverters and to return said sheets to said sheet path from both of said two independent sheet inverters inverted and in the same said closely spaced apart desired sheet sequence in said same sheet output path.