Patent ID: 8177327

Claim:
An ink jet recording apparatus, comprising a carriage and a head supporting plate having a line head mounted thereon which comprises a plurality of short heads staggered said head supporting plate being attached to the carriage whereby recording is performed by ink jet printing with the line head on a recording medium positioned beneath the carriage, characterized in that it further comprises: a portion of projection formed on a rear side of the head supporting plate where the head supporting plate is attached to the carriage, the portion of projection entering into a hole formed in the carriage; and a portion of recess which is formed on an obverse side of the head supporting plate and at a position corresponding to that of the portion of projection and whose inner bottom surface becomes a head mounting surface on which a said short head having a nozzle is to be mounted, said head mounting surface being formed with a nozzle accepting hole adapted to accept the nozzle of said short head for mounting said short head on said head mounting surface.