Sheet laminator and image forming system incorporating the sheet laminator

A sheet laminator comprising:

• a thermal pressure roller pair including:
• a first roller;
• a first heater to heat the first roller;
• a second roller;
• and
• a second heater to heat the second roller,
• to form a nip region between the first roller and the second roller to press and convey a two-ply sheet in which an inner sheet is inserted between two sheets of the two-ply sheet;
• a power cutoff device to:
• detect a change in temperature of at least one of the first roller or the second roller;
• and
• cut off a power to at least one of the first heater or the second heater;
• a mover to relatively move the second roller away from the first roller;
• a power line coupling the power cutoff device to the mover;
• and
• circuitry configured to:
• cause the power cutoff device to cut off the power line;
• and
• cause the mover to relatively move the second roller away from the first roller,
• in response to the power cutoff device cutting off the power to at least one of the first heater or the second heater.