The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 2000
Filed:
Sep. 08, 1997
Ove Larson, Hagen-Langedrag, SE;
Array Printers AB, , SE;
Abstract
A movable printhead having a screen or lattice-shaped control electrode matrix prints each page as a series of narrow bands across the width of the page. An information carrier such as paper is placed between a back electrode and the control electrode matrix, both of which are connected to voltage sources. Voltage sources connected to the control electrode matrix at least partially open and close passages through the control electrode matrix. Charged pigment particles attracted from a particle carrier through open passages are deposited on the information carrier to form visible images. In one embodiment, a particle carrier is rotated in opposite directions in response to the direction of movement of the printhead. In another embodiment, a cleaning assembly having a magnetic roll and located outside the printing area removes unwanted pigment particles from the control electrode matrix. In another embodiment, two stationary belts, a tooth wheel, a mechanical angle link, a rotary belt, and two single-direction wheels are arranged to rotate a particle carrier in a same direction regardless of the direction the printhead is moved.