Sheet feeding or delivering – Feeding – Pack holders
Patent
1991-11-26
1993-06-29
Olszewski, Robert P.
Sheet feeding or delivering
Feeding
Pack holders
271127, B65H 110
Patent
active
052227251
ABSTRACT:
A sheet feed mechanism of an image recording apparatus comprises a lifter mechanism movable between a first position in engagement with a cassette that holds a sheet thereon and a second position in disengagement with the cassette, a first urging mechanism for urging the lifter mechanism to the first position with a first urging force, a second urging mechanism for urging the lifter mechanism to the second position with a second urging force that acts opposite to the first urging force, and a control mechanism connected the second urging mechanism, wherein the control mechanism is adapted to engage with the cassette when the cassette is mounted on the image recording apparatus for causing a change in the second urging forces depending on whether the cassette is mounted on the image recording apparatus or the cassette is dismounted from the image recording apparatus, such that the second urging force is smaller than the first urging force when the cassette is dismounted from the image recording apparatus and such that the second urging force is larger than the first urging force when the cassette is mounted on the image recording apparatus.
REFERENCES:
patent: 4488718 (1984-12-01), Tamura
patent: 5058877 (1991-10-01), Fujiwara et al.
Kasahara Rikio
Komada Kenya
Milef Boris
Olszewski Robert P.
Ricoh & Company, Ltd.
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