Mechanisms; Basic Structure - Riso ComColor X1 series Technical Manual

Registration Section

1. Mechanisms

1-1. Basic Structure

The registration section transfers paper into the printing area from the internal or external paper feed unit or
switchback unit. This section is comprised of vertical paper feed units B and A, the registration roller unit, and the
paper position detection unit.
Vertical paper feed unit A
Vertical paper feed unit B
Normal printing action
1) Registration rollers stop before paper from the feed or switchback sections are transferred further.
2) The leading edge of paper from the feed or switchback sections comes into contact with the registration rollers,
which are stopped, making the front edge parallel to the registration roller shaft.
3) The leading edge of paper from the paper feed tray or internal paper feed section is detected by the registration
sensor. If no paper is fed, the registration rollers do not rotate.
4) As rollers rotate at a specific speed, the straightened paper is held and then transferred with a specific force.
5) Multiple paper feeds are detected by top edge sensor 1. If a multiple paper feed occurs, the registration rollers
stop rotating before the leading edge of paper reaches the print heads.
6) The registration rollers continue rotating at a specific speed until the trailing edge is clear of the registration
rollers.
7) After a specific period once paper has cleared the registration rollers, the registration rollers stop rotating.
8) If paper jams other than non-feeds are detected, the registration rollers stop rotating.
Registration sensor
(receive)
Registration roller unit
Paper position detection unit
Top edge sensor 1 (receive)
Registration roller
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ComColor Series (Revision 2.4)