| Patent Number |
Title Of Patent |
Date Issued |
| 4422405 |
Color electrostatographic apparatus |
December 27, 1983 |
| A single magnetic brush developing unit is disposed adjacent to a photoconductive drum for applying toner thereto. Three applicator units are selectively actuatable to apply three toners of respective primary colors to the developing unit. |
| 4277162 |
Electrophotographic apparatus comprising density sensor means |
July 7, 1981 |
| One or more marks (34), (36) are provided on a non-image area of a platen (23) which supports an original document (16). Electrostatic images of the document (16) and mark (34) are formed on a photoconductive drum (12) and developed to form toner images. The toner image of the original d |
| 4239374 |
Electrostatographic apparatus comprising automatic document type determination means |
December 16, 1980 |
| An image of an original document (16) is sensed to determine if the document (16) is a printed document (the image consists of characters and symbols) or a photographic document. The exposure illumination intensity, developing bias voltage and/or other variable operating parameters are |
| 4159166 |
Beam splitting lens assembly |
June 26, 1979 |
| Two lens groups are arranged symmetrically on opposite sides of a mirror which may be a half-mirror or a dichroic mirror. The mirror is oriented perpendicular to the optical axis of the lens groups. A light image incident on the lens assembly at an angle to the optical axis is split |
