Difference between Non-contact Transport and Contact Transport in DF Scanning

Descriptions

Because of the film attached to the glass, the original doesn’t contact the glass.

While passing, the original contacts the glass.

Merit

It almost never causes stripes on the image that arise from foreign substances transferring from the original to the glass.

It almost never causes stripes on the image that arise from dust on the glass, because the glass is cleaned by contact with the transported original.

Demerit

Compared with the contact method, stripes on the image caused by dust occur more often.

Compared with the non-contact method, stripes on the image caused by foreign substances transferred from the surface of an original to the glass occur more often.

Aim

To improve the prevention of stripes in the image caused by sticky foreign substances.

Considering the target users of this machine, it’s important to improve prevention of stripes caused by dust in the path

Note

1. Be sure to replace the sheet-through glass with the film attached on the glass.
2. When you attach the film on the glass, you need to keep the left scale attached on the glass in order to fix the location of the film.*1
3. You can change the method (contact method to non-contact, or vice versa) by replacing some parts.*1

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