Fixing Block; Photosensitive Drum Cleaning Block; High-Voltage Control; Outline - Canon LBP3300 Series Service Manual

Table of Contents

A print paper is separated from the drum by its elasticity. (Curvature Separation) The static charge on the back side of a print paper is decreased with the electrostatic

eliminator after the transfer process in order to stable the feeding operation and prevent the crescent spots of printing image under the L/L environment.

2.4.1.6 Fixing block

The toner image transferred onto a print paper through the transfer block can be smeared easily by hands since it is only attracted to the paper by the static electricity.

The paper and the toner on it are fixed by pressure and fused by heat to be a permanent image in this block.

Step 6: Fixing

Fixing film

There is a possibility to splatter the toner when it is fixed because the toner image transferred onto a paper is attached by the positive charge from the back side of it.

This printer applies the negative DC voltage to the fixing film through the pressure roller, so that the negative charge is flown to the front side of a print paper from

the fixing film before it comes to the fixing heater. It results that the transferred toner is held stronger onto the paper and it is prevented from splattering.

This printer utilizes the on-demand fixing method with the lower heat capacity fixing film, which warms up quickly and does not require the power supply during

standby period. The feature of this method is that the wait period is shorter than 10 sec. and thus energy-saving.

The fixing film is a sleeve shaped film made from the polyamide and the fluorine coats its surface to prevent the offset.

2.4.1.7 Photosensitive drum cleaning block

In the transfer block, not all toner is transferred from the photosensitive drum onto a print paper but some remains on the drum.

The drum cleaning block cleans the surface of the photosensitive drum in order to keep a clear image in the following prints.

Step 7: Drum cleaning

The cleaning blade scrapes off the leftover toner on the drum surface to be got ready for the next print. The waste toner is kept in the cleaner container.