Carrier assembly and ink jet printhead assembly associated therewith

An imaging apparatus, comprising:

• a first side frame;
• a second side frame;
• a first guide rod extending between said first side frame and said second side frame, said first guide rod having a first surface and a first cross-sectional area;
• a second guide rod extending between said first side frame and said second side frame and arranged parallel to said first guide rod, said second guide rod having a second surface and a second cross-sectional area;
• a carrier assembly having a body and having a color printhead interface unit attached to said body;
• a color printhead unit structured and arranged for mating engagement with said color printhead interface unit, said color printhead unit having a first bearing surface which contacts said first surface of said first guide rod and a first pair of V-shaped bearings defining four bearing surfaces which contact said second guide surface of said second guide rod.

A printhead unit for an imaging apparatus having a guide member, comprising:

• a housing having at least a first side member;
• a printhead attached at least to said first side member of said housing;
• and
• at least one bearing having at least one bearing surface, said bearing coupled to said first side member of said housing and positioned to engage said guide member.

A printhead unit for an imaging apparatus having a first guide member and a second guide member comprising:

• a housing having at least a first side member and a second side member;
• a printhead attached to said housing;
• a first bearing having a first bearing surface, said first bearing being coupled to said first side member of said housing and positioned to engage said first guide member;
• and
• a second bearing having a second bearing surface, said second bearing being coupled to said second side member of said housing and positioned to engage said second guide member.