By BiUie J Robison

A very large number of people contributed to the development ol the 2680 Laser Printing System and everyone's part was important and appreciated. However, I want to give specfal acknowledgment to a number of individuals and groups whose efforts and contributions were especially important. Roger Archibald did the fusing and effluent control system design and developmens. Dan Battazzo did the mechanical design of the paper feed and path, assisted in the final structural frame development, and...

Insulating Blocks

The corona wire must he supported by the insulating endblocks in such a way that there is no high-voltage breakdown during operation even after a long period of operation. Hreakdown can be avoided by choosing a material with good insulating properties and designing the surface topography so that there is not a short, straight path from a high voltage to ground. In addition, the voltages present are high enough that it is important to avoid edges or points with a small radius to prevent unwanted...

By Erwin H Schwiebert and Paul R Spencer

IN ELECTROPHOTOGRAPHY, the image on the paper is created in several stages, as explained in the box on page 6. This article covers the second step, that of producing the electrical image on the drum, including initializing the drum electrically. The heart of the process is the photoconductor drum, the structure of which is shown in Fig. 1. The aluminum substrate is coated with a layer of cadmium sulfide about 40 micrometres thick. On top of this is a layer of polyester about 25 micrometres...

Electrostatic Monitor

Electrostatic Monitor

Drum potentials monitored and controlled by the microprocessor system are measured by an electrostatic volt- Fig, 1. Electrostatic monitor ESM equivalent circuit The ESM is a noncontacting electrostatic voltmeter used to measure drum potentials meter. This nan contacting voltmeter measures drum potentials from 130V to 630V in a diagnostic area of the drum and scales them between 0 and 5V for ana log-to-digital conversion. If the measured drum potentials are not equal to the target values, the...