Ink feed system
AssigneeRaytheon Company
InventorsErnst F.R.A. Schloemann, Fred M. Howell
Life of this patent
Estimating the term…
Abstract
An ink feed system for an electrophoretic printer wherein a ribbon is used to carry ink from an ink supply to the paper upon which it is applied by means of an electric field. A magnetic constituent is added to the ink and a magnetic field is impressed alongside the ribbon and parallel to the surface thereof. A Hall probe positioned in the magnetic field senses perturbations thereof perpendicular to the ribbon induced by the presence of ink on the ribbon. A signal produced by the Hall probe signals the density of the ink upon the ribbon and is utilized for regulating a flow of ink onto the ribbon.
Claims7
An ink feed system for ink having a magnetic constituent comprising:
- carrier means for transporting said ink;
- means positioned alongside said carrier means for directing a magnetic field in a plane parallel to a surface of said carrier means to secure said ink to said carrier means;
- and
- means positioned alongside said carrier means for detecting a component of a perturbation of said magnetic field normal to a surface of said carrier means, said perturbation being due to the presence of said ink, said detecting means signaling an amount of said ink being transported by said carrier means.
Dependencies are inferred from the claim text.