Abstract: A mechanical key scheme is integrated into a composite pattern on both a print cartridge and its corresponding printer carriage chute. In a preferred embodiment the pattern incorporates a plurality of adjacent contiguous columns on both sides of a latch, with each column capable of defining multiple position bits in order to precisely differentiate between different types and/or different families of print cartridges.

Abstract: An inkjet printer includes a carriage having a flexible circuit connecting to the carriage in a relatively movable but movably constrained relationship. The carriage and flexible circuit cooperatively define an instant center so that an array of electrical contact pads of the flexible circuit is reliably and repeatably positioned relative to the carriage, while manufacturing variabilities and thermal differential expansions between the carriage and flexible circuit, for example, are accommodated without loss of relative positional control of the array of contact pads and the carriage.

Abstract: A mechanical key scheme is integrated into a composite pattern on both a print cartridge and its corresponding printer carriage chute. In a preferred embodiment the pattern incorporates a plurality of adjacent contiguous columns on both sides of a latch, with each column capable of defining multiple position bits in order to precisely differentiate between different types and/or different families of print cartridges.

Abstract: Apparatus for aligning a flexible circuit on an ink jet printer carriage includes three members located on a wall of the print carriage. The members are positioned to receive a flexible circuit having a circular hole and two elongate slots therein. Each slot has a major axis that intersects the center of the circular hole. The members permit the flexible circuit to flatten out during assembly of the carriage and to remove any unevenness in its surface.

Abstract: An ink-jet print cartridge is especially configured for loading and unloading into and from an ink-jet print cartridge by use of substantially only horizontal translational movements relative to a carriage of the printer. The apparatus includes a generally rectangular prismatic print cartridge having its major axis of elongation disposed horizontally. The print cartridge includes a pair of outwardly extending elongate horizontal supporting lips located one on each of the opposite side walls of the print cartridge, a carriage body, a chute mounted on the carriage for receiving the print cartridge, and a generally horizontal guide rail on each of the pair of side walls of the chute. The guide rails guide the print cartridge into the carriage by supportingly engaging the lips.

Abstract: An ink-jet print cartridge having a low profile. The print cartridge includes a print cartridge body, a lid securely affixed to the body, and a latch located on the lid. The print cartridge further includes two elongate supporting lips located along the side walls of the body for supporting the print cartridge during loading. Loading is effected with a plurality of gripping surfaces remotely located from the latch.