Abstract: An image forming apparatus includes: an image forming unit for forming a toner image and transferring the toner image to a sheet material; a fixing device for fixing the transferred toner image to the sheet material; a measurement device for measuring the gloss of the toner image fixed to the sheet material; a separator for separating the sheet material from the fixing device; and a controller which determines a performance of separating the sheet material from the fixing device based on an output from the measurement device and controls the operation of the separator.

Abstract: An image forming apparatus includes: an image forming unit for forming a toner image and transferring the toner image to a sheet material; a fixing device for fixing the transferred toner image to the sheet material; a measurement device for measuring the gloss of the toner image fixed to the sheet material; a separator for separating the sheet material from the fixing device; and a controller which determines a performance of separating the sheet material from the fixing device based on an output from the measurement device and controls the operation of the separator.

Abstract: An electric horn (1) has a coil bobbin (4) in a casing (2). A fixed iron core (3) is fixed in a hole (4f) in the coil bobbin (4) and is magnetized to define an exciting coil (C). A moving iron core (10) is at the center of a diaphragm (9) at the open end of the casing (2) and faces the fixed iron core (3). The moving iron core (10) is displaced relative to the fixed iron core (3) by a power supply of the exciting coil (C); thus beeping an alarm. The moving iron core (10) has an end face toward the fixed iron core (3) that strides over a reference position (N) within the amplitude (W) of the moving iron core (10). The end portion on the moving iron core (10) side of the wound portion (4e) of the exciting coil (C) is the reference position (N).

Abstract: An electric horn (1) has a coil bobbin (4) in a casing (2). A fixed iron core (3) is fixed in a hole (4f) in the coil bobbin (4) and is magnetized to define an exciting coil (C). A moving iron core (10) is at the center of a diaphragm (9) at the open end of the casing (2) and faces the fixed iron core (3). The moving iron core (10) is displaced relative to the fixed iron core (3) by a power supply of the exciting coil (C); thus beeping an alarm. The moving iron core (10) has an end face toward the fixed iron core (3) that strides over a reference position (N) within the amplitude (W) of the moving iron core (10). The end portion on the moving iron core (10) side of the wound portion (4e) of the exciting coil (C) is the reference position (N).