Patent ID: 8570580

Claim:
A printing system in which a paper feed unit of a second printing apparatus is connected to a paper discharge unit of a first printing apparatus, a sheet conveyed from the paper discharge unit of said first printing apparatus is fed to the paper feed unit of said second printing apparatus, and said second printing apparatus performs printing on the sheet, said first printing apparatus comprising: a first paper feed unit configured to feed a held sheet to said first printing apparatus, an inserter configured to be further connected to the paper feed unit of said second printing apparatus, and to feed a held sheet to one of said first printing apparatus and said second printing apparatus, wherein the inserter is separate from the first paper feed unit, and a first control unit configured to control paper feed from said inserter to the paper feed unit of said second printing apparatus, and said second printing apparatus comprising a second control unit configured to transmit, to said first control unit, control information for controlling paper feed from said inserter, wherein said second control unit comprises: a determination unit configured to determine whether an instruction designating manual insertion paper feed is contained in a received print job, and, a paper feed control unit configured to, in a case where the determination unit determines that the instruction designating manual insertion paper feed is contained in the received print job, transmit, to said first control unit, the control information requesting to feed a sheet held in said inserter from said inserter to the paper feed unit of said second printing apparatus, and in a case where the determination unit determines that the instruction designating manual insertion paper feed is not contained in the received print job, feed, to the paper feed unit of said second printing apparatus, a sheet which has been fed by the first paper feed unit and then undergone printing by said first printing apparatus.