Sharp SF-1120, SF-1020 Descriptions of Each Section, Paper feed section, General descriptions

[5]DESCRIPTIONS OF EACH SECTION

Descriptions are made on the following sections:

1Paper feed section

2Developing section

3Optical section

4Process section

5Separation/transport section

6Fusing/paper exit section

7High voltage section

8ADU section (SF-1120 only)

SF-CM15 (Option)

1. Paper feed section

1) General descriptions

To realize the compact design, the front loading system and the fol- dable multi paper feed unit are employed.

Use of the optional two-stage paper feed unit for the SF-CM15 (one- stage paper feed unit for the SF-CM16) and the spare tray allows a variety of system configurations.

(System configuration) Example with the SF-1020:

SF-1020
50 sheets
250 sheets	250 sheets
250 sheets	SF-UB15
SF-CM16	(Spare tray)
(One-step paper feed unit)
Or
250 sheets
250 sheets
SF-CM15
(Two-step paper feed unit)

In the case of SF-1020:

The SF-2020 is provided with the three-way paper feed system. The tray is of the universal type and has capacity of 250 sheets. The front loading system allows the tray to be loaded from the lower side of the front cabinet.

(The SF-1120 has the two-way paper feed system with one 250-sheet tray and manual feed.)

The tray has the capacity of 500 sheets (250 sheets for the SF-1120). In addition to that, the optional paper feed unit allows loading of 500 sheets more for the SF-CM15 (250 sheets for the SF-CM16).

2) Basic operations

(Tray paper feed operation)

When the CPFC (Cassette paper feed clutch) turn on, the paper feed roller shaft, the paper feed roller, and the take-up roller rotate in the direction of A. At the same time, the limiter spring moves down the roller release arm. As a result, the take-up roller falls by its own weight onto the paper surface, starting paper feed.

Roller release arm

Take-up roller

Paper feed roller

Paper feed roller shaft

When the CPFC turns off, rotation stops and the take-up roller is pushed up to the original position by the roller release arm spring.

(Multi manual paper feed operation)

When the MPFS (multi paper feed solenoid) turns on, the spring clutch rotates to press the take-up roller on the paper, feeding the paper.

5 – 1