| Patent Number |
Title Of Patent |
Date Issued |
| 5194879 |
Image forming apparatus capable of changing dotting density |
March 16, 1993 |
| An image forming apparatus includes a laser beam scanning unit for scanning a recording medium in synchronism with a writing clock signal so that a dotted image is formed on the recording medium, a counter for carrying out a count operation in synchronism with the writing clock signal so |
| 4853710 |
Imaging by laser beam scanning |
August 1, 1989 |
| A laser beam scanning system includes a laser for emitting a laser beam modulated with image information to be recorded and a deflecting device, such as polygon mirror, for deflecting the laser beam over a predetermined angle repetitively, so that the laser beam is scanned on a scanning |
| 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 |
| 4162843 |
Color electrostatic copying machine |
July 31, 1979 |
| Three primary color toner images are transferred successively onto a copy sheet from three photoconductive drums. The copy sheet is successively moved into engagement with the drums in register with the toner images by an endless belt. Various transfer charging means are provided to |
