The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1994
Filed:
May. 27, 1992
Naoto Yamaguchi, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
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.