Document Pickup/Separation - Canon Color Image Reader-F1 Service Manual

2
Technology > Controls (ADF) > Document Pickup/Separation > Basic Pickup Operation
Start of reading of reverse
side of second document sheet
End of reading of reverse
side of second document sheet
Stop after feeding the second
document sheet to reversal
position
2 Technology > Controls (ADF) > Document Pickup/Separation > Basic Pickup Operation
Removal of idle reversal registration
loop of second document sheet and
release of re-pickup/delivery roller
Pressurization of second document
sheet delivery roller
Completion of delivery of second
document sheet and end of job
F-2-17

Document Pickup/Separation

■ Basic Pickup Operation
With a document placed on the document tray, pressing the print start key will pick up the
document in the following manner.
Pickup operation
When the pickup/feed motor (M1) turns in reverse direction, the pickup roller unit lowers to
rotate the pickup rollers, thus feeding the document.
The stopper rises in conjunction with the pickup roller unit.
The separation sheet and pad are used to prevent multiple sheets from being fed together.
M1
Pickup roller unit
CL1
Document
Stopper
Formation of loop
While the pickup/feed motor (M1) is turning in the reverse direction, the document is fed
against the stationary registration roller to form a loop because the registration clutch is not
driven, thus preventing the document from skewing.
Registration roller
Formation of loop
2-12
M1
Pickup roller unit
CL1
Separation pad Separation sheet
F-2-18
F-2-19
2-12