Abstract: A cartridge can comprise a first elastomeric membrane and a second elastomeric membrane, and portions of the elastomeric membranes which are sealed to each other can circumscribe unsealed portions of the membranes. In a resting state, the unsealed portion of the first elastomeric membrane abuts or is proximate to the unsealed portion of the second elastomeric membrane. One or more reagents can be injected between the unsealed portions of the first and second elastomeric membranes to push the unsealed portions apart from each other in this region of the membranes. The unsealed portions can be sequentially pushed apart in downstream regions to form a channel between the elastomeric membranes. Positively displaced fluid pushes the unsealed membrane portions apart to a volume that conforms to the volume of the fluid to minimize or prevent dead volume in the channel and thus minimize or prevent air bubbles in the fluid.

Abstract: A perforate element for use in a print head for non-contact liquid printing comprises: at least one ejection element including an outlet, configured to eject a bulk flow of printing liquid out of the print head; and a liquid residence element, arranged to provide a layer of liquid over the outlet which extends laterally of the outlet and through which the bulk flow is ejected.

Abstract: A mixer system for use with a non-contact liquid printer comprises: a printing liquid reservoir and an expansion volume; and an aspirator element, configured to reduce the pressure in the expansion volume, thereby to displace printing liquid from the reservoir to the expansion volume, and restore the pressure in the expansion volume, thereby to return the printing liquid to the reservoir so as to mix the printing liquid therein.

Abstract: A perforate element for use in a print head for non-contact liquid printing comprises: at least one ejection element including an outlet, configured to eject a bulk flow of printing liquid out of the print head; and a liquid residence element, arranged to provide a layer of liquid over the outlet which extends laterally of the outlet and through which the bulk flow is ejected.

Abstract: A mixer system for use with a non-contact liquid printer comprises: a printing liquid reservoir and an expansion volume; and an aspirator element, configured to reduce the pressure in the expansion volume, thereby to displace printing liquid from the reservoir to the expansion volume, and restore the pressure in the expansion volume, thereby to return the printing liquid to the reservoir so as to mix the printing liquid therein.

Abstract: A cartridge can comprise a first elastomeric membrane and a second elastomeric membrane, and portions of the elastomeric membranes which are sealed to each other can circumscribe unsealed portions of the membranes. In a resting state, the unsealed portion of the first elastomeric membrane abuts or is proximate to the unsealed portion of the second elastomeric membrane. One or more reagents can be injected between the unsealed portions of the first and second elastomeric membranes to push the unsealed portions apart from each other in this region of the membranes. The unsealed portions can be sequentially pushed apart in downstream regions to form a channel between the elastomeric membranes. Positively displaced fluid pushes the unsealed membrane portions apart to a volume that conforms to the volume of the fluid to minimize or prevent dead volume in the channel and thus minimize or prevent air bubbles in the fluid.

Abstract: A perforate element (101) for use in a print head for non-contact liquid printing comprises: at least one ejection element (103) including an outlet (103a), configured to eject a bulk flow (F) of printing liquid (L) out of the print head; and a liquid residence element (107), arranged to provide a layer of liquid over the outlet (103a) which extends laterally of the outlet (103a) and through which the bulk flow (F) is ejected.

Abstract: A mixer system for use with a non-contact liquid printer comprises: a printing liquid reservoir (103) and an expansion volume (105); and an aspirator element (111; 311; 411), configured to reduce the pressure in the expansion volume (105), thereby to displace printing liquid (L) from the reservoir (103) to the expansion volume (105), and restore the pressure in the expansion volume (105), thereby to return the printing liquid (L) to the reservoir (103) so as to mix the printing liquid (L) therein.

Abstract: A mixer system for use with a non-contact liquid printer comprises: a printing liquid reservoir (103) and an expansion volume (105); and an aspirator element (111; 311; 411), configured to reduce the pressure in the expansion volume (105), thereby to displace printing liquid (L) from the reservoir (103) to the expansion volume (105), and restore the pressure in the expansion volume (105), thereby to return the printing liquid (L) to the reservoir (103) so as to mix the printing liquid (L) therein.

Abstract: A perforate element (101) for use in a print head for non-contact liquid printing comprises: at least one ejection element (103) including an outlet (103a), configured to eject a bulk flow (F) of printing liquid (L) out of the print head; and a liquid residence element (107), arranged to provide a layer of liquid over the outlet (103a) which extends laterally of the outlet (103a) and through which the bulk flow (F) is ejected.