Chapter 8
8-32
8.10 Detecting the Double-Feed
8.10.1 Detecting Double Feeding
0011-7360
The machine uses the ultra-sonic wave sensor (for transmission, reception) located downstream of the reg-
istration roller to check for double feeding, and stops the ongoing printing operation upon detection. Ul-
trasonic waves are often characterized as follows, and
may be used for the detection of double feeding regardless of the type of medium used (plain
paper, heavy paper, colored paper, transparency, etc.).
- propagation is subject to significant attenuation between different densities (e.g., air and paper).
- propagation is free of attenuation in regard to the color or thickness of the object being checked.
F-8-53
[1] Double feeding sensor (transmission)
[2] Double feeding sensor (reception)
[3] Registration roller
MEMO:
Some models (for sale in specific countries) may not come standard with this detection mechanism. Its use
requires a Double Feeding Detection Kit (optional).
<Timing of Detection>
- interval extending several 100s of msec after the registration roller clutch goes on
<Sequence of Operation>
1) The mechanism is started.
2) The machine identifies double feeding.
3) The machine turns off the fixing motor as soon as the paper reaches the fixing nip area.
- The paper stops at the fixing nip area, with paper found downstream thereof discharged outside the ma-
chine.
- The control panel screen indicates the presence of a jam (0C00).
[1]
[2]
[3]
Summary of Contents for IMAGERUNNER 7095 PRINTER
Page 20: ...Chapter 1 Introduction...
Page 46: ...Chapter 2 Installation...
Page 88: ...Chapter 3 Basic Operation...
Page 94: ...Chapter 4 Main Controller...
Page 116: ...Chapter 5 Original Exposure System...
Page 165: ...Laser Exposure Chapter 6...
Page 175: ...Chapter 7 Image Formation...
Page 231: ...Chapter 8 Pickup Feeding System...
Page 287: ...Chapter 9 Fixing System...
Page 312: ...Chapter 10 External and Controls...
Page 346: ...Chapter 11 MEAP...
Page 350: ...Chapter 12 RDS...
Page 360: ...Chapter 13 Maintenance Inspection...
Page 375: ...Chapter 14 Standards Adjustments...
Page 407: ...Chapter 15 Correcting Faulty Images...
Page 433: ...Chapter 16 Self Diagnosis...
Page 460: ...Chapter 17 Service Mode...
Page 559: ...Chapter 18 Upgrading...
Page 583: ...Chapter 19 Service Tools...
Page 588: ...APPENDIX...
Page 615: ......