Sheet feeding or delivering – Feeding – By means to convey sheet
Patent
1992-10-27
1994-09-20
Olszewski, Robert P.
Sheet feeding or delivering
Feeding
By means to convey sheet
198630, 310323, B65H 512
Patent
active
053482875
ABSTRACT:
A sheet feeding apparatus in which vibration members of the running track type to form travelling waves are arranged in the vertical direction so as to face each other and a sheet sandwiched between them is fed by frictional forces is disclosed. In order to reduce the number of parts of a circuit to drive the upper and lower vibration members, the polarizing directions in the A-phase piezoelectric transducer portions of the piezoelectric transducers for the upper vibration member are opposite to the polarizing directions in the A-phase piezoelectric transducer portions of the piezoelectric transducers for the lower vibration member. Further, the polarizing directions in the B-phase piezoelectric transducer portions for the upper vibration member are the same as the polarizing directions in the B-phase piezoelectric transducer portions for the lower vibration member.
REFERENCES:
patent: 5062622 (1991-11-01), Kataoka et al.
patent: 5065999 (1991-11-01), Kataoka et al.
patent: 5085423 (1992-02-01), Nishimoto et al.
patent: 5094444 (1992-03-01), Seki
patent: 5149080 (1992-09-01), Yamamoto
patent: 5155407 (1992-10-01), Kimura et al.
patent: 5176376 (1993-01-01), Igaki et al.
Nishimoto Yoshifumi
Yamamoto Shinji
Canon Kabushiki Kaisha
Milef Boris
Olszewski Robert P.
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