Abstract: An inkjet cartridge for use with a thermal inkjet printer includes a standpipe area and an entrained ink chamber that are connected in fluidic communication. The entrained ink chamber and standpipe area can be enclosed by a wall that can have a plurality of panels or facets. The inkjet cartridge also includes a duct or passage that is connected in fluidic communication to both the standpipe area and the entrained ink chamber, wherein the connection to the entrained ink chamber is operatively located above the standpipe area, thus enabling anomalous air bubbles to migrate from the standpipe area and into the entrained ink chamber.

Abstract: Inkjet pen apparatus include a pen body, a print head supported on the body, and a removable lid configured to engage the body by one of several means. Methods of enclosing an inkjet pen reservoir include providing a body that defines an ink reservoir, providing a lid configured to removably engage the body by one of several means, and placing the lid in removable retainment with respect to the body. The body and lid can include one each of a number of lid-engagement features, and body-engagement features, respectively, that are configured to cause the lid to be removably retained on the body.

Abstract: An inkjet cartridge for use with a thermal inkjet printer includes a standpipe area and an entrained ink chamber that are connected in fluidic communication. The entrained ink chamber and standpipe area can be enclosed by a wall that can have a plurality of panels or facets. The inkjet cartridge also includes a duct or passage that is connected in fluidic communication to both the standpipe area and the entrained ink chamber, wherein the connection to the entrained ink chamber is operatively located above the standpipe area, thus enabling anomalous air bubbles to migrate from the standpipe area and into the entrained ink chamber.