Abstract: This disclosure describes, in part, systems for tracking the removal of shopping bags or other items from a dispenser. Folded shopping bags are stacked in a holder so that a front shopping bag can be removed by pulling it along an axis that is parallel to the length and/or width dimension of the shopping bag. A motion sensor is positioned to sense movement of the front shopping bag as it is removed. Control logic monitors and/or analyzes data or other signals from the motion sensor and determines whether movement of at least a threshold distance has occurred. If movement of at least the threshold distance has occurred, the control logic concludes that a shopping bag has been removed and generates a corresponding event notice. Other system components may respond to the event notice by applying a charge for the removed shopping bag or by performing other actions.

Abstract: Various apparatus and methods are disclosed in which fluid is circulated across one or more print heads.

Abstract: A fluid reservoir for use in a printing device includes a housing that, at least partially, forms at least one chamber therein. The chamber is configured to hold a fluid. A bubble port leads through housing into a first region of chamber and fluidically couples chamber to atmospheric gas external to housing. A bubble director arranged within chamber is configured to direct at least one bubble of gas from first region to a second region of chamber. The bubble is formed within fluid within first region upon gas entering chamber through bubble port.

Abstract: Example embodiments of output locations are illustrated and described.