Abstract: One exemplary fluid ejection device includes a substrate having one or more layers positioned thereon. The fluid ejection device also includes a fluid-feed path extending through a space which is defined, at least in part, by the one or more layers. The fluid ejection device including methods and structures for managing air and amongst other things gas bubble formation.

Abstract: An expandable handle for a rotational tool having two end segments of a handle. The end segments are rotatably attached to the body of the handle. In one embodiment, the end segments rotate in the same plane. In a second embodiment, the end segments rotate in parallel planes. The first embodiment preferably employs magnets in the end segments to keep such end segments aligned when an expansion of the handle is not desired. The second embodiment preferably achieves this goal by having a channel channel on a first end segment and a complementary extension on a second end segment.