Sheet processing apparatus

A sheet processing apparatus that processes a portion-to-be-processed on a sheet having a plurality of pre-products, the sheet processing apparatus comprising:

• at least one processing tool that is changeable between a processable state in which the portion-to-be-processed is processed on the sheet and an unprocessable state in which the portion-to-be-processed is not processed on the sheet, and performs processing on the sheet in a conveyance perpendicular direction perpendicular to a conveyance direction of the sheet;
• a setting unit that sets operation parameters on the processable state and the unprocessable state;
• and
• a control unit that controls an operation of the processing tool based on the set operation parameters,
• wherein the setting unit includes a processable state holding process in which the at least one processing tool remains in the processable state when a first portion-to-be-processed is processed in a first pre-product and the setting unit maintains the at least one processing tool in the processable state until after a second portion-to-be-processed of the same type as the first portion-to-be-processed is processed in a second pre-product on the sheet, and
• wherein the setting unit includes an unprocessable state holding process in which the at least one processing tool remains in the unprocessable state before the first portion-to-be-processed is processed or when the second portion-to-be-processed is not processed after the first portion-to-be-processed is processed, and
• wherein when a margin is provided around one of the pre-products, a first marginal portion-to-be-processed which extends from the first portion-to-be-processed is processed in the margin and a second marginal portion-to-be-processed which extends from the second portion-to-be-processed is processed in the margin, the setting unit sets the operation parameters such that the processing tool remains in the processable state and draws an outside margin portion-to-be-processed with an inverted C-shaped trajectory or a C-shaped trajectory outside the conveyance perpendicular direction in order to connect the first marginal portion-to-be-processed and second marginal portion-to-be-processed.