Pressure diffrentials at printers

1. A method comprising:

identifying, by a processor, a gap in a housing of a printing apparatus;

positioning, an inlet of a conduit inside the housing;

fluidly connecting the inlet to a fan;

powering the fan to create a pressure differential across the housing to minimize the amount of air inside the housing being able to escape the housing via the gap.

2. A method as claimed in claim 1 further comprising:

directing air taken from the housing to a treatment station; and

treating the air at the treatment station.

3. A method as claimed in claim 2 , further comprising:

releasing the treated air into the environment.

4. A method as claimed in claim 1 , further comprising:

measuring, by a sensor, the concentration of a volatile organic compound within the printing apparatus; and

adjusting, by a processor, the air flow rate in the conduit, or positioning the inlet, based on the measured concentration.

5. A method as claimed in claim 1 , further comprising:

measuring, by a sensor the differential pressure at a location in the printing apparatus; and

adjusting, by a processor, the air flow rate in the conduit, or positioning the inlet, based on the measured differential air pressure.

6. A method as claimed in claim 1 , further comprising:

determining, by a processor, a state of the printing apparatus; and

Adjusting, by a processor, the air flow rate in the conduit, or positioning the inlet, based on the state of the printing apparatus.

7. A method as claimed in claim 1 further comprising:

identifying, by a processor, a plurality of gaps in the housing;

positioning each of a plurality of conduit inlets inside the housing;

fluidly connecting each inlet to a respective fan in a plurality of fans;

powering each fan to create a pressure differential across each gap to minimize the amount of air inside the housing being able to escape the housing via the gap.

8. A printing apparatus comprising:

a casing for a printing element of the printing apparatus, the casing comprising a gap through which air may pass from the inside to the outside of the printing apparatus;

a pressure source to create a suction pressure;

a conduit fluidly connected to the pressure source and positioned so as to create a pressure differential across the casing to minimize the amount of air inside the casing being able to escape the casing via the gap.

9. A printing apparatus as claimed in claim 8 , the printing apparatus further comprising:

a controller to determine a state of the printing apparatus and to regulate the suction pressure of the pressure source based on the determined state.

10. A printing apparatus as claimed in claim 8 , the printing apparatus further comprising:

a plurality of conduits connected to the pressure source; and

a controller to regulate the suction pressure in each of the plurality of conduits.

11. A printing apparatus as claimed in claim 8 , the printing apparatus further comprising:

a concentration sensor to determine the concentration of a volatile organic compound within the printing apparatus; and

a controller to regulate the suction pressure in the conduit such that air is drawn from a location with the lowest concentration of volatile organic compounds.

12. A printing apparatus as claimed in claim 11 , the printing apparatus further comprising:

a differential pressure sensor to determine the differential pressure at a location within the printing apparatus; and

a controller to regulate the suction pressure in the conduit based on the determined differential pressure.

13. A non-transitory computer-readable storage medium comprising a set of computer-readable instructions stored thereon, which, when executed by a processor of a printing system cause the processor to:

locate an opening in an exterior casing of a printing system via which air from inside the printing system may escape; and to

create a pressure state within the printing system proximate the opening such that air from outside the printing system is drawn inside the printing system via the opening.

14. A non-transitory computer-readable storage medium as claimed in claim 13 , wherein the instructions, when executed by the processor, cause the processor to:

determine the concentration of volatile organic compounds in the air inside the printing system; and

operate a blower to create the pressure state by drawing air from within the printing system from a location where the concentration of volatile organic compounds is determined to be the lowest.

15. A non-transitory computer-readable storage medium as claimed in claim 13 , when executed by the processor, cause the processor to:

determine the differential pressure inside the printing system; and

operate a blower to create the pressure state by drawing air from within the printing system from a location based on the determined differential pressure.