Apparatus to receive a developer roller

A binary ink developing (BID) system, comprising:

• a base assembly;
• a developer roller to reside in the base assembly, said developer roller having a rotary bearing on opposing ends of the developer roller;
• each of multiple ends of the base assembly including a first datum pin, a second datum pin, and a clamp containing a spring member;
• wherein each clamp, when locked in place in part by action of the spring member, is to push against a corresponding rotary bearing when the developer roller is installed in the base assembly, said rotary bearing being forced by the clamp into contact with the first and second datum pins to position the developer roller in the base assembly.

A printing system, comprising:

• a photoconductor;
• and
• a BID assembly to cause liquid toner to be applied to said photoconductor;
• wherein the BID assembly comprises a base assembly including end caps at opposing ends of the base assembly, said base assembly includes a receptacle for a developer roller having a rotary bearing on opposing ends of the developer roller;
• each end cap including a first datum pin, a second datum pin, and a clamp containing a spring member;
• and
• wherein each clamp, when locked in place in part by action of the spring member, is to push against a corresponding rotary bearing when the developer roller is installed in the base assembly, said rotary bearing being forced by the clamp into contact with the first and second datum pins to position the developer roller in the base assembly.