Abstract: In one embodiment, a cartridge includes: a housing having a chamber therein for holding a fluid; a hole extending through the housing to the chamber; and a breachable membrane that, in an unbreached state, substantially closes the hole, the membrane resiliently configured such that, upon being breached, the membrane rebounds to a breached state only partially closing the hole.

Abstract: In one embodiment, a cartridge includes: a housing having a chamber therein for holding a fluid; a hole extending through the housing to the chamber; and a breachable membrane that, in an unbreached state, substantially closes the hole, the membrane resiliently configured such that, upon being breached, the membrane rebounds to a breached state only partially closing the hole.

Abstract: In one embodiment an ink cartridge includes a housing defining a first fluid reservoir, and an expansible bladder defining a second fluid reservoir. The bladder is located within the first fluid reservoir, and includes opposing first and second wall members. The first wall member is fabricated from a material having a first shape-memory, and the second wall member is fabricated from a material having a second shape memory which is less than the first shape memory. In another embodiment a method of producing an expansible bladder includes providing a synthetic sheet fabricated from a material having a shape-memory, and folding the sheet in a generally “U” shape to produce first and second opposing wall members. Each wall member has two side edges and a top edge. The first and second wall members are sealed to each other along the side edges and top edges.

Abstract: In one embodiment an ink cartridge includes a housing defining a first fluid reservoir, and an expansible bladder defining a second fluid reservoir. The bladder is located within the first fluid reservoir, and includes opposing first and second wall members. The first wall member is fabricated from a material having a first shape-memory, and the second wall member is fabricated from a material having a second shape memory which is less than the first shape memory. In another embodiment a method of producing an expansible bladder includes providing a synthetic sheet fabricated from a material having a shape-memory, and folding the sheet in a generally “U” shape to produce first and second opposing wall members. Each wall member has two side edges and a top edge. The first and second wall members are sealed to each other along the side edges and top edges.