Explosion protected ink-jet printer in protected room - has print head located in pressure encapsulated housing within sealed room with safe environment

摘要

The ink jet printer is used in an explosion protected form, with a security zone. The explosion proof room (5) contains a central unit (1) and the print head (2), both of which are encapsulated with pressure protected housings (3,4). Information generated as input to the central unit is provided by a keyboard (8) that is located in an unprotected external space (6). Within the protected space an inert gas is circulated to avoid the possibility of sparks being generated. ADVANTAGE - Full protection against explosions.