Image-forming apparatus having electromagnetic clutch for transmitting drive force of motor to conveying roller

An image-forming apparatus comprising:

• a motor;
• a conveying roller configured to convey a sheet in a conveying direction upon receipt of a drive force of the motor;
• an image-forming portion configured to form an image on the sheet conveyed by the conveying roller;
• an electromagnetic clutch configured to transmit the drive force of the motor to the conveying roller upon receipt of power;
• and
• a controller configured to:
• control the conveying roller to successively convey a plurality of sheets to the image-forming portion;
• and
• control the image-forming portion to form an image on each of the plurality of sheets, the plurality of sheets including a first sheet and a second sheet to be successively conveyed to the image-forming portion following the first sheet,
• wherein in a case where a sheet length of the first sheet is shorter than or equal to a predetermined length:
• the controller supplies power to the electromagnetic clutch to convey the first sheet and the second sheet to the image-forming portion so that a sheet gap in the conveying direction of the second sheet is equivalent to a first gap, the sheet gap of one sheet being a space formed between a trailing end of a previous sheet and a leading end of the one sheet, the previous sheet being successively conveyed prior to the one sheet, and
• wherein in a case where the sheet length of the first sheet is longer than the predetermined length:
• the controller supplies power to the electromagnetic clutch to successively convey a first number of sheets starting from the first sheet to the image-forming portion so that the sheet gap of each of the first number of sheets is equivalent to the first gap;
• and
• after the first number of sheets has been conveyed to the image-forming portion, the controller supplies power to the electromagnetic clutch to convey at least one sheet to the image-forming portion so that the sheet gap of each of the at least one sheet is equivalent to a second gap greater than the first gap.