# US 2014/0193309 A1 · Liquid Dispenser Cassette > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193309 A1 - Document ID: US20140193309A1 - Status: Published application - Kind: A1 - Application number: 13/736,860 - Filed: 2013-01-08 - Published: 2014-07-10 - Earliest claimed: 2013-01-08 - Assignees: Hewlett-Packard Development Company, L.P. - Applicants: Hewlett-Packard Development Company, L.P. - Inventors: Matthew C. Still; Dennis R. Esterberg; Jeffrey A. Nielsen; Debora J. Thomas; Christie L. Dudenhoefer; Kevin F. Peters - Web page: https://patentgrep.com/patent/US20140193309A1 ## CPC - B01L 3/0268: {using pulse dispensing or spraying, eg. inkjet type, piezo actuated ejection of droplets from capillaries} - B01L 9/54: {Supports specially adapted for pipettes and burettes} - B01L 2300/0816: Cards, e.g. flat sample carriers usually with flow in two horizontal directions - B01L: CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE ## Abstract A liquid dispenser cassette includes a frame, dispense head assemblies, and a one-piece integrated slot extender. The frame defines openings. The dispense head assemblies are mounted on the frame. The dispense head assemblies include dispense head dies at least partially exposed through the corresponding openings. The dispense head dies defines top slots. The slot extender is mounted on the dispense head assemblies. The slot extender has reservoirs defining drain openings mated to the corresponding top slots. ## Claims ### Claim 1 A liquid dispenser cassette, comprising: a frame defining openings; dispense head assemblies mounted on the frame, the dispense head assemblies comprising dispense head dies at least partially exposed through the corresponding openings, the dispense head dies defining top slots; and a one-piece integrated slot extender mounted on the dispense head assemblies, the slot extender comprising reservoirs defining drain openings mated to the corresponding top slots. ### Claim 2 (depends on 1) The cassette of claim 1, wherein the frame comprises top alignment features. ### Claim 3 (depends on 2) The cassette of claim 2, wherein the slot extender defining bottom alignment features mated to the top alignment features. ### Claim 4 (depends on 3) The cassette of claim 3, wherein the frame further defines a recess to receive the dispense head assemblies, and the openings are located in a recess floor. ### Claim 5 (depends on 4) The cassette of claim 4, further comprising a pressure sensitive adhesive in the recess, the pressure sensitive adhesive defining other openings aligned with the first openings and the top alignment features, the dispense head assemblies and the one-piece integrated slot extender being at least partially fixed by the pressure sensitive adhesive. ### Claim 6 (depends on 1) The cassette of claim 1, wherein the dispense head assemblies comprise at least eight dispense head assemblies. ### Claim 7 (depends on 1) The cassette of claim 1, wherein the dispense head assemblies consist of one to seven dispense head assemblies. ### Claim 8 (depends on 1) The cassette of claim 1, wherein the dispense head assemblies consist of four dispense head assemblies. ### Claim 9 (depends on 1) The cassette of claim 1, wherein each reservoir has a capacity of at least 180 microliters. ### Claim 10 (depends on 1) The cassette of claim 1, wherein each reservoir has a capacity of at least 20 microliters. ### Claim 11 (depends on 1) The cassette of claim 1, wherein each reservoir has a capacity of at least 360 microliters. ### Claim 12 (depends on 1) The cassette of claim 1, wherein each dispense head assembly comprises a substrate, a dispense head die mounted on the substrate, and electrical contact pads on the substrate coupled to the dispense head die. ### Claim 13 (depends on 1) The cassette of claim 1, wherein each dispense head die comprises: a nozzle array exposed through a corresponding first opening; and a top slot corresponding to a drain opening of a reservoir. ### Claim 14 (depends on 1) The cassette of claim 1, wherein the frame includes a handle. ### Claim 15 A liquid dispenser cassette, comprising: a frame defining a recess, the recess defining openings; dispense head assemblies seated in the recess, each dispense head assembly comprising: a substrate; a dispense head die mounted on the substrate, the dispense head die comprising: a top slot; and downward nozzle array exposed through a corresponding opening; and a set of electrical contact pads on the substrate coupled to the dispense head die; a one-piece integrated slot extender mounted on dispense head dies along the length of the recess so sets of electrical contact pads remain exposed, the slot extender comprising reservoirs defining drain openings mated to corresponding top slots, each reservoir having a capacity equal to or greater than 20 microliters. ### Claim 16 (depends on 15) The cassette of claim 15, wherein the frame comprises top alignment features and the slot extender defining bottom alignment features mated to the top alignment features. ### Claim 17 (depends on 15) The cassette of claim 15, wherein: the frame, the recess, and the dispense head assemblies are substantially rectangular; the dispense head assemblies are oriented with their longer dimension parallel to a shorter dimension of the recess; the dispense head assemblies are evenly spaced in a longer dimension of the recess; and the slot extender is oriented with its longer dimension parallel to the longer dimension of the recess so the electrical contact pads of each dispense head assembly are exposed and accessible to a digital dispenser.