Medium feed control method for preventing overlap-feed of...

Details Medium feed control method for preventing overlap-feed of... Medium feed control method for preventing overlap-feed of...

2011-05-24

2011-05-24

Colilla, Daniel J (Department: 2854)

Typewriting machines

Sheet or web

Including friction-feed means

C400S624000, C400S625000, C271S272000, C271S273000

Reexamination Certificate

active

07946776

ABSTRACT:
A sheet feeding procedure supplies recording media from a medium enclosing portion to a medium conveying path. An overlap-feed detecting procedure monitors a thickness of recording media supplied to the medium conveying path, thereby detecting the overlap-feed media. Sheet returning procedures (A) and (B) return the overlap-feed media into the medium enclosing portion when the overlap-feed media are detected. A looseness forming procedure applies rotational forces of different rotation speeds to upper and lower surfaces of the overlap-feed media during the medium returning procedure, thereby forming a looseness in the overlap-feed media. A medium re-feeding procedure supplies again the returned recording media to the medium conveying path from the medium enclosing portion. In the medium feed control, the overlap-feed can be further certainly recovered.

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