Fire protection bonnet for electronic equipment. Copiers and printers are often easily accessible in corridors that also serve as escape routes. When heating the fuser unit, a failure of the thermal switch can quickly lead to a fire. After only a few minutes, visibility is so severely restricted that escape becomes dramatically more difficult. At the first sign of smoke development, the Copy-Cap automatically and within a few seconds seals off the affected unit against fire. The system can be mounted either on the wall or on the ceiling.