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

Claim 27:
28. A non-transitory computer readable medium comprising instructions which, when executed by at least one electronic processor, configure the at least one electronic processor to execute a method for designing a nozzle for jetting printing material in a printing system, the method comprising:
receiving an input for a surface tension and viscosity of a printing material at a jetting temperature;
receiving an input for a drop volume of the printing material;
constructing a simulation of a constricted dissipative section of the nozzle by:
defining a length of the constricted dissipative section with respect to an orifice length; and
defining a cross-sectional area of the constricted dissipative section;
outputting the simulation of the constricted dissipative section to a display device;

defining a diameter of constriction, dc, of the constricted dissipative section that is approximately constant along the length of the constricted dissipative section;
displaying on the display device an image representing 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.