| 摘要 |
<p>A device and method for measuring heat and pressure of a fusing nip formed between heat and pressure fusing rolls for fusing powder images onto copy sheets. The nip measuring device consists of two polyimide sheets each having a thickness ranging from 3 to 8 mils and one of which is coated with silicone rubber material. The two sheets are positioned between the opened nip of heat and pressure fusing rolls which are then closed for a predetermined time. Upon separation of the rolls the two sheets are removed and observed. A distinct pattern is formed on the uncovered sheet from the rubber coating on the second sheet indicating immediately contact arc and pressure characteristics of the fusing nip. Upon separation of the sheets the pattern is removed due to a neutralization of electrostatic surface forces holding the sheets together.</p> |
