This equipment runs down-sequence control in the cases listed below. Down-sequence control decreases the print speed by lengthening the interval between sheets

in order to prevent film deterioration caused by heated edge of the fixing film during continuous printing of small-sized (smaller than A4R) paper.

- When the sub-thermistor 1 temperature reading exceeds the readings listed below

- When the sub-thermistor 2 temperature reading exceeds 220 degrees C

Also in the case of uncertain paper size (e.g., by manual feeding or unspecified paper size) it executes the down sequence control as well as in the case of printing

small sized papers.

The following table indicates the down sequences in accordance with the paper type).

Process speed

Normal speed

plain paper

(64 to 105 g/m2)

thin paper

(less than 64 g/m2)

special fixing mode 2 *3

half-speed

plain paper

(64 to 105 g/m2)

thin paper

(less than 64 g/m2)

rough paper *1

rough paper (strong) *2

special fixing mode 2 *3

1/4 Speed

OHT

*1 rough paper: heavy paper (106 to 169 g/m2), bond paper (64 to 105 g/m2), coated paper (106 to 169 g/m2), label paper.

*2 extra heavy paper (170 to 220 g/m2), extra heavy coated paper (170 to 20 g/m2), Jpn postcard, 2-pane Jpn postcard, 4-pane Japan postcard, envelope.

*3 For settings and details of special fixing mode 2, see the User's Guide.

In the case of continuous print of the small size paper (the width less than A4R), it executes fixing film edge cooling control to prevent film deterioration caused

by heating of the fixing film edge, as opposed to the down sequence.

9.3 Film Unit Pressurizing Mechanism

9.3.1 Pressure/release control

/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880

This machine does the control to make pressuring/releasing the fixing film unit to prevent the fixing film being transformed.

Pressuring/releasing of fixing film unit are regulated by pressure plate [1] and releasing lever [2]. Pressure plate [1] pushes fixing film unit [4] by a spring to press

it to pressure roller [5]. Release lever [2] is rotated by fixing motor (M3), pushes pressure plate [1] down to release fixing film unit [4] from pressure roller [5].

pressuring operation

Fixing motor (M3) rotates in a positive direction. The pressure plate [1] puts down the fixing film unit by the power of the spring and presses to the pressure roller

[5].

releasing operation

Fixing motor (M3) reverses, pressure release lever 2 [2] pushes up the pressure plate [2] so that the fixing film unit [4] releases from the pressure roller [5].

9-8

Paper type

plain paper

plain paper L

LBP3380

special printing process

>plain paper

>mode 2

LBP2880

process option

>special fixing mode

>mode 2