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

Claim 23:
24. 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, comprising:
defining a length of the constricted dissipative section with respect to an orifice length;
defining a cross-sectional area of the constricted dissipative section of the nozzle having at least two intersecting channels wherein the at least two intersecting channels comprise at least two walls that are parallel to one another;
defining a diameter of constriction, dc, of each 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 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.