Abstract: A fluid ejection system can include a carriage base that includes a first pen slide at a bottom rear of the carriage base, a second pen slide at a front of the carriage base, and a pen guide at a top rear of the carriage base, the pen guide can include a guide portion to engage a substantially vertical portion of a back corner of a pen, a blocker portion to engage a substantially horizontal portion of the top back corner of the pen, and a pen guide corner formed between the guide portion and the blocker portion to hold a top back corner of a pen substantially in place during an angular loading of the pen.

Abstract: The present specification describes a manifold for a fluid ejection system. The manifold includes a rotational connector on a first side surface, a plurality of pen interconnects on a bottom surface of the manifold, and a sliding surface on a top surface of the manifold. The sliding surface is to accommodate a fluidic interface. Sliding the fluidic interface along the sliding surface extends needles from the fluidic interface through the plurality of pen interconnects into a plurality of pens.

Abstract: The present specification describes a manifold for a fluid ejection system. The manifold includes a rotational connector on a first side surface, a plurality of pen interconnects on a bottom surface of the manifold, and a sliding surface on a top surface of the manifold. The sliding surface is to accommodate a fluidic interface. Sliding the fluidic interface along the sliding surface extends needles from the fluidic interface through the plurality of pen interconnects into a plurality of pens.

Abstract: The present specification describes a carriage base for a fluid ejection system. In some examples, the carriage base includes a first pen slide at the bottom rear of the carriage base. In some examples, the carriage base includes a second pen slide at the front of the carriage base. In some examples, the carriage base includes a pen guide at the top rear of the carriage base to hold a top back corner of a pen during an angular loading of the pen.

Abstract: In an example, a space adjuster may comprise a cam shaft, a first fin disposed on a first end of the cam shaft, a second fin disposed on a second end of the cam shaft, opposite from the first end, and a cam lug disposed on the cam shaft in between the first end and the second end. The first fin may have a first profile to transfer a first longitudinal force into a first rotation of the cam shaft, and the second fin may have a second profile to transfer a second longitudinal force into a second rotation of the cam shaft, opposite to the first rotation. A cam surface of the cam lug may be spaced increasingly farther away from a longitudinal axis of the cam shaft throughout the first rotation of the cam shaft.

Abstract: In an example, a space adjuster may comprise a cam shaft, a first fin disposed on a first end of the cam shaft, a second fin disposed on a second end of the cam shaft, opposite from the first end, and a cam lug disposed on the cam shaft in between the first end and the second end. The first fin may have a first profile to transfer a first longitudinal force into a first rotation of the cam shaft, and the second fin may have a second profile to transfer a second longitudinal force into a second rotation of the cam shaft, opposite to the first rotation. A cam surface of the cam lug may be spaced increasingly farther away from a longitudinal axis of the cam shaft throughout the first rotation of the cam shaft.