Dispensing aperture hoods

A device, comprising:

• a valve body including a curved internal face spanning between a pair of flat internal faces;
• a printing substance transfer aperture through the curved internal face of the valve body;
• a shielding body to shield the printing substance transfer aperture and define a geometry of a receiving-side mating interface permitted to interface with the printing substance transfer aperture;
• a printing substance dispensing nozzle, including a curved external face spanning between a pair of flat external faces, movable between a first position with an opening of the printing substance dispensing nozzle facing the curved internal face and a second position with the opening of the printing substance dispensing nozzle facing the printing substance transfer aperture;
• and
• a dispensing-side gasket material slide-able against the curved internal face of the valve body and through the printing substance transfer aperture when moving the printing substance dispensing nozzle between the first position and the second position.

A system, comprising:

• a dispensing-side mating interface, including:
• a valve body;
• a printing substance transfer aperture through the valve body;
• a hood, fixed to the valve body, encompassing the printing substance transfer aperture within a chamber between an external face of the valve body and the hood;
• a printing substance dispensing nozzle movable between a first position with an orifice of the printing substance dispensing nozzle facing an internal face of the valve body and a second position with the orifice of the printing substance dispensing nozzle facing out of the printing substance transfer aperture;
• a dispensing-side gasket material slide-able through the printing substance transfer aperture when moving the printing substance dispensing nozzle between the first position and the second position;
• and
• a receiving-side mating interface, having a complementary geometry to a geometry of the cavity, to slide within the cavity and engage with a geometry of the hood to receive the printing substance through the printing substance transfer aperture.