Typewriting machines – Sheet or web – For feeding web record-medium
Patent
1992-05-27
1994-05-03
Burr, Edgar S.
Typewriting machines
Sheet or web
For feeding web record-medium
400625, 4006362, B41J 1303
Patent
active
053081765
ABSTRACT:
An apparatus for conveying paper in a printer adapted to convey cut-sheet and fan-fold paper bidirectionally in a paper path. The apparatus includes a paper discharging assembly positioned downstream of a print head and at least one paper conveying assembly positioned upstream of the print head. First and second power transmissions cooperate with the paper conveying and the paper discharging assemblies, respectively, to convey the paper in both a forward and reverse direction to desired printing positions and to convey the paper away from the print head. The paper conveying assembly grips the paper with greater force than the paper discharging assembly while the second power transmission has greater play b2 than the play b1 of the first power transmission. In order to convey the paper in the reverse direction the motor rotates a distance equal to b1+an amount of rotation MAXd2 equal to the distance in the second direction to a desired second printing position from the first printing position absent any play)+(an additional amount of rotation .gamma.). The motor then rotates in the forward position an amount equal to (b1+.gamma.) to drive the paper to the second desired printing position.
REFERENCES:
patent: 4688957 (1987-08-01), Prevignano
patent: 4929105 (1990-05-01), Hirayama et al.
patent: 5050858 (1991-09-01), Nakamura
patent: 5051014 (1991-09-01), Takagi et al.
Burr Edgar S.
Hilten John S.
Seiko Epson Corporation
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