LOW NOISE MICROWAVE DRYING
Original Publication Date: 1991-Oct-31
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
A low noise power supply circuit of a microwave generator used in drying liquid ink jet prints is disclosed. A conventional microwave generator circuit shown in Figure 1, uses a center-tapped full-wave rectifier circuit 1 to power a magnetron 2. This circuit produces excess noise at an AC wave form generated at 6OHz and 120Hz. The noise produced at such modulations interferes with the microwave source heat generation uniformity. This interference may result in non-uniform drying of ink jet printed sheets, particularly at high process speeds through a microwave drying region.