(2) Exposure

A Laser beam is generated from the semiconductor laser and control- led by the print pattern signal. The laser writes onto the OPC drum surface through the polygon mirrors and lens. The resistance of the OPC layer decreases for an area exposed by the laser beam (cor- responding to the print pattern signal). The beam neutralizes the negative charge. An electrostatic latent image is formed on the drum surface.

Semiconductor laser

Exposure (semiconductor laser)

OPC layer Pigment layer

Aluminum layer

Drum surface charge sfter the exposure

OPC layer

Pigment

layer

Aluminum

layer

Non-image area Image area

AR-161

 

 

Non-image area

 

 

 

-600

 

 

 

Drum

-400

 

 

 

surface

Developing bias

Toner attract

 

 

 

 

 

potential

 

 

potential

 

Residual potential (-50 to -100V)

 

 

Image area

 

 

 

0

 

 

 

 

Charge

Exposure

Developing

Charge

 

Transfer

Discharge

Time

Toner is attracted over the shadowed area because of the developing bias.

(4) Transfer

The visible image on the drum surface is transferred onto the print paper by applying a positive charge from the transfer corona to the backside of the print paper.

(3) Developing (DC bias)

A bias potential is applied to the MG roller in the two component magnetic brush developing method, and the toner is charged nega- tive through friction with the carrier. Non-image area of the drum surface charged with negative potential repel the toner, whereas the laser exposed portions where no negative charges exist, attract the toner. As a result, a visible image appears on the drum surface.

: Carrier (Magnetized particle)

: Toner (Charge negative by friction)

(N)(S) : Pemanent magnet (provided in three locations)

(5) Separation

Since the print paper is charged positively by the transfer corona, it is discharged by the separation corona. The separation corona is con- nected to ground.

(6) Cleaning

Toner remaining on the drum is removed and collected by the clean- ing blade. It is transported to the waste toner collecting section in the cleaning unit by the waste toner transport roller.

DC

N

S

N

MG roller

-400v -8V

6 – 4

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Image 27
Sharp AR-161, AR-160 specifications Exposure, Transfer, Developing DC bias, Separation, Cleaning
Page 26 Page 28

AR-160, AR-161 specifications

The Sharp AR-161 and AR-160 are monochrome multifunction printers that have made a mark in the office equipment landscape with their impressive features, technologies, and characteristics. Both devices are designed to cater to the needs of small to medium-sized businesses that require reliable, efficient, and compact systems for their printing, copying, and scanning needs.

One of the main features of the Sharp AR-161 and AR-160 is their impressive speed. The AR-161 can produce up to 16 pages per minute (ppm), while the AR-160 offers a slightly lower output at 15 ppm. This makes both models suitable for environments where quick document turnaround is essential. Additionally, both machines have a warm-up time of approximately 20 seconds, ensuring minimal downtime when starting up.

In terms of paper handling, both models come equipped with a 250-sheet paper drawer and a 100-sheet bypass tray, allowing for a variety of media types and sizes. The automatic document feeder (ADF) can accommodate up to 50 sheets, making it easier to handle multi-page documents without manual intervention. This feature enhances workflow efficiency significantly, particularly in busy office settings.

The Sharp AR-161 and AR-160 utilize advanced copying technologies, including a high-resolution scanning capability of up to 600 x 600 dpi. This means that documents are reproduced with clarity and detail, making them suitable for professional presentations and reports. The devices also offer various copying options, such as zoom, collation, and reduction/enlargement, providing versatility for different copying tasks.

Both models are equipped with Sharp's innovative ImageSEND technology, which allows users to scan documents directly to email, network folders, or USB drives with ease. This feature enhances productivity by streamlining the scanning process, ensuring that documents can be shared quickly and efficiently.

Furthermore, energy efficiency is a hallmark of the Sharp AR-161 and AR-160, as both models are ENERGY STAR qualified. This means they are designed to use less energy, helping businesses reduce their environmental impact while also saving on operational costs.

In conclusion, the Sharp AR-161 and AR-160 combine speed, versatility, and energy efficiency in a sleek design. Their advanced copying technologies and smart features make them ideal choices for businesses seeking reliable multifunction devices that can enhance productivity without compromising on quality.
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