FLUID CARTRIDGE Russian patent published in 2018 - IPC B41L27/00 

FIELD: printing industry.

SUBSTANCE: fluid cartridges are replaceable assemblies with a corresponding fluid dispensing mechanism. Ink cartridge for an inkjet printer comprises a lower surface and a front surface. Interfaces on the front surface for connection to the receiving structure for the cartridge include an ink receptacle, wherein the lower surface of the ink cartridge is provided with a latch stop and a latch for guiding and holding the latch of the receiving structure for the cartridge. Latch track comprises a locking track and an unlocking track and is configured to move the latch relative to the latch stop, where said movement occurs along the locking track to the locked engagement position upon entry and along the unlocking track, which is at least partially different from the locking track, to the unlocked position when ejected. Cartridge comprises a guide track on the lower surface for engaging the guide of the receiving structure for the cartridge and for guiding the cartridge along a straight line for connecting to interfaces, wherein the guide track has interaction surfaces with a guide that extend parallel to said straight line, and has a length of at least 5 mm, wherein the guide track and the latch track are formed by one common recess in the bottom surface.

EFFECT: keying feature discriminates the cartridge from other fluid cartridges to prevent the cartridge from being inserted incorrectly into the receiver.

16 cl, 15 dwg