Printing apparatus and method for conveying sheet

A method for conveying a sheet in a printing apparatus including

• a conveying unit for conveying the sheet through a conveying path,
• a sheet discharging unit located downstream of the conveying unit for discharging the sheet from the conveying path to a sheet discharging position,
• a sheet feeding unit located upstream of the conveying unit for feeding the sheet to the conveying path,
• a printing unit located between the conveying unit and the sheet discharging unit for printing onto the sheet, and
• a driving unit for driving the conveying unit, the sheet discharging unit, and the sheet feeding unit, comprising:
• a first conveying step of conveying a first sheet and a second sheet fed subsequently to the first sheet at a first conveying speed after a leading end of the first sheet is placed at a sheet feeding control position set upstream of a printing start position where the printing unit starts printing and before a trailing end of the first sheet is placed at a sheet discharging standby position where the first sheet can be discharged from the sheet discharging unit to the sheet discharging position at a predetermined sheet discharging speed;
• and
• a second conveying step of conveying the first sheet and the second sheet at a second conveying speed higher than the first conveying speed after the trailing end of the first sheet is positioned at the sheet discharging standby position and before the first sheet is discharged and a leading end of the second sheet is placed at the sheet feeding control position.

A printing apparatus comprising:

• a conveying unit for conveying a sheet through a conveying path;
• a printing unit located downstream of the conveying unit for printing onto the sheet;
• a sheet discharging unit located downstream of the printing unit for discharging the sheet from the conveying path to a sheet discharging position;
• a sheet feeding unit located upstream of the conveying unit for feeding the sheet to the conveying path;
• a driving unit for driving the conveying unit, the sheet discharging unit, and the sheet feeding unit;
• and
• a control unit configured to control the driving unit so that a first sheet and a second sheet fed subsequently to the first sheet are conveyed at a first conveying speed, and then the first sheet and the second sheet are conveyed at a second conveying speed higher than the first conveying speed after the trailing end of the first sheet is positioned at a sheet discharging standby position where the first sheet can be discharged from the sheet discharging unit.

A printing apparatus comprising:

• a printing unit configured to perform a printing operation to print on a sheet at a printing position;
• a conveying unit located upstream of the printing position in a sheet conveying direction and configured to convey the sheet;
• a driving unit configured to drive the conveying unit;
• a discharging unit located downstream of the printing position and configured to discharge the sheet, the discharging unit driven by the driving unit;
• and
• a control unit configured to control so that:
• when a trailing end of a first sheet passes through the discharging unit, a second sheet subsequent to the first sheet is conveyed by the conveying unit,
• when the printing operation is performed by the printing unit, the driving unit is driven at a first driving speed, and
• when the trailing end of the first sheet passes through the discharging unit, the driving unit is driven at a second driving speed faster than the first driving speed.

A printing apparatus comprising:

• a printing unit configured to perform a printing operation to print on a sheet at a printing position;
• a conveying unit located upstream of the printing position in a sheet conveying direction and configured to convey the sheet;
• a driving unit configured to drive the conveying unit;
• a discharging unit located downstream of the printing position and configured to discharge the sheet, the discharging unit driven by the driving unit;
• a feeding unit configured to feed a sheet to the conveying unit, the feeding unit driven by the driving unit;
• and
• a control unit configured so that:
• when a trailing end of a first sheet passes through the discharging unit, a second sheet subsequent to the first sheet is conveyed by the conveying unit,
• when the printing operation is performed by the printing unit, the driving unit is driven at a first driving speed, and
• when the trailing end of the first sheet passes through the discharging unit, the driving unit is driven at a second driving speed faster than the first driving speed.

A printing apparatus comprising:

• a printing unit configured to perform a printing operation to print on a sheet at a printing position;
• a supplying unit located upstream of the printing position in a sheet conveying direction and configured to supply a sheet to the printing position;
• a driving unit configured to drive the supplying unit;
• and
• a discharging unit located downstream of the printing position, and configured to discharge the sheet, the discharging unit driven by the driving unit;
• and
• a control unit configured so that:
• wherein when a trailing end of a first sheet passes through the discharging unit, a second sheet subsequent to the first sheet is supplied to the printing position by the supplying unit,
• wherein when the printing operation is performed by the printing unit, the driving unit is driven at a first driving speed, and
• wherein when the trailing end of the first sheet passes through the discharging unit, the driving unit is driven at a second driving speed faster than the first driving speed.