Patent ID: 11919241
Assignee: XEROX CORPORATION
Field: Other special machines (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 8:
9. A method for designing a nozzle for jetting printing material in a printing system, the method comprising:
selecting a surface tension and viscosity of a printing material at a jetting temperature;
selecting a drop volume of the printing material; and
constructing a constricted dissipative section of the nozzle having at least three channels, comprising:
defining a length of the constricted dissipative section with respect to an orifice length;
defining a cumulative cross-sectional area of the at least three channels of the constricted dissipative section of the nozzle;
defining a diameter of constriction, dc, of the constricted dissipative section that is approximately constant along the length of the constricted dissipative section; and

expelling a build material from the nozzle, the nozzle comprising the defined length and cumulative cross-sectional area of the constricted dissipative section; and wherein
a relaxation time, τ, of the nozzle is independent of the defined length of the constricted dissipative section and is proportional to dc2.