Canon DR-4010C - imageFORMULA - Document Scanner, Руководство пользователя

Страница: 117 / 143

Chapter 7 ISIS/TWAIN Driver Settings
7-21
Double Feed Detection
This function stops document transport when double feeding of document pages is detected, and
provides selection of the detection method to suit the documents to be scanned.
[Detect by Length]
This method of double feed detection is good for batch scanning of same-size documents: the length
of the first document page fed is taken as a standard, and when a subsequent document is detected
to be 50 mm longer (or shorter) than the standard, a double feed is judged to have occurred, and
document transport is stopped.
[Detect by Ultrasonic]
This method of double feed detection is good for batch scanning of different-size documents: the
overlapping of documents transported in a batch is detected ultrasonically, and if the detected
overlap is 50 mm or more, a double feed is judged to have occurred and document transport is
stopped.
☞
Both detection methods can be used at the same time.
☞
If the documents overlap by less than 50 mm, or if the documents cling (such as from static
electricity,) ultrasonic detection of double feeds may be unreliable.
Feeding Option
Here you can select the feeding method for document scanning.
[Standard Feeding]
This feeding method is good for scanning small batches of documents that are loaded one batch at
a time: scanning stops when the loaded documents have been scanned.
[Panel Feeding]
This feeding method is good for scanning batches of documents of different sizes: after loading the
documents, press the Job button (assigned as a Start button on the scanner) to start scanning, and
press the assigned Stop button to stop scanning.
☞
When scanning documents with different-size pages, after loading the documents, you can adjust
the document guide position.
[Automatic Feeding]
This feeding method is good for scanning batches of same-size documents: scanning starts when
the scanner detects loaded documents, and stops when you press the Stop button.
☞
When [Automatic Feeding] is selected, the [Setting] button is enabled to allow setting the delay
time from when a loaded document is detected until scanning starts. (See “Scanning Multiple
Documents,” on p. 9-3.)
Batch Separation (ISIS driver only)
Items available for selection depend on the Feeding Option setting: select batch separation timing
(for when to start scanning) according to the batch separation capabilities provided by the
application program.