DEVICE FOR AUTOMATIC TONER SUPPLY TO TONER CARTRIDGE Russian patent published in 2015 - IPC G03G21/18 

FIELD: printing.

SUBSTANCE: invention relates to a device for automatic toner supply to the toner cartridge of the laser printer or the copier, namely the automatic device of toner supply in which the toner is automatically supplied with use of an inflatable balloon expanding or compressing with supply or discharge of air from it to push the toner to the cartridge or adding the toner from above to the lower part, and in case of determining by the sensor of finishing the toner, lack of toner, the controller changes the volume of the inflatable balloon, feeding or releasing air from it the predetermined number of times. The claimed group of inventions comprises automatic devices of toner supply in the toner cartridges and the colour toner cartridge of the laser printer or the copier, comprising: a container for storing the toner, that is used to store the toner with the possibility of replenishment; an outer container for containing in it of the container for toner storage; a toner supply unit to supply toner located in the container for storing the toner in the toner cartridge; and a toner supply pipe connected to the lower part of the container for storing the toner to supply toner to the toner cartridge; at that the toner supply unit comprises: an inflatable balloon, which is expanded or compressed when supply or discharge of air from it for pushing of the toner at the lower part in the direction of the cartridge or adding the toner from above to the lower part; an air pump for pumping air into the inflatable balloon; an air pipe connecting the inflatable balloon to the air pump; the control valve and the control unit for controlling the control valve, which allows the present invention to provide stable printing by preventing interruptions of the toner supply.

EFFECT: providing device for automatic toner supply to the toner cartridge of the laser printer or copier, in which toner is filled in the cartridge without removing the cartridge from the housing, the missing amount of toner can be replenished by filling without pulling out the cartridge from the housing, reduction of probability of failure of the device of toner supply with the main method of toner supply with use of change in volume of inflatable balloon.

12 cl, 11 dwg