Printer having one end of paper bail separated from a platen and the other end thereof contacting the platen
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsYoshio Tsuru, Shunji Murai
Life of this patent
Estimating the term…
Abstract
A printer comprises a rotatable platen for supporting a sheet and a printhead which is capable of moving along the platen to print data on the sheet. A paper bail shaft supports paper bail rollers rotatably so as to be faced to the platen. A printhead retreating unit makes the printhead retreat to a position opposed to one end of the platen at the time of a paper feed operation. Arms serve as a paper bail retreating unit to separate the paper bail rollers from the platen at the time of the paper feed operation by displacing one end of the paper bail shaft a greater distance from the platen than the other end where the printhead is retreated.
Claims9
A printer comprising:
- a platen means for supporting a sheet;
- a printing means for printing data on the sheet supported by said platen means, said printing means moving along said platen means between both ends of said platen means;
- a retreating means for retreating said printing means to a retreated position opposed to one end of said platen means at the time of a paper feed operation;
- a paper ball means for feeding the sheet in cooperation with said platen means;
- and
- means for facilitating paper feeding including separating means for separating said paper ball means from said platen means at the time of the paper feed operation so that a first separating distance between one end of said paper ball means and said platen means at the end of said platen means away from said retreated position of said printing means is larger than a second separating distance between the other end of said paper ball means and said platen means adjacent to the retreated position of said printing means.
A printer comprising:
- a platen means for supporting a sheet;
- a printing means for printing data on the sheet supported by said platen means, said printing means moving along said platen means between both ends of said platen means;
- a retreating means for retreating said printing means to a retreated position opposed to one end of said platen means at the time of a paper feed operation;
- a paper bail means for feeding the sheet in cooperation with said platen means, said paper bail means including a paper bail shaft;
- and
- separating means including a pair of arms, one arm of said pair of arms connected at each end of the paper bail shaft and a pair of cams, one cam of said pair of cams associated with each arm of said pair of arms, each said cam having a different diameter than the other cam, said separating means for separating said paper bail means from said platen means at the time of the paper feed operation so that a second separating distance between one end of said paper bail means and said platen means is larger than a first separating distance between an opposite end of said paper bail means and said platen means corresponding to the retreated position where said printing means is retreated.
A printer comprising:
- a platen;
- a print carriage, said print carriage mounting a printhead and movable along a print guide parallel to said platen;
- a control means for controlling operation of the printer, one control action being to position said print carriage at a home position opposite to one end of said platen;
- a paper bail comprising a paper bail shaft and paper bail rollers for holding a print medium against said platen;
- and
- separating means for separating said paper bail from said platen during a paper feed operation, a first end of said paper bail at said one end of said platen where said print carriage is at the home position being separated to a first distance and a second end of said paper bail remote from where said print carriage is at the home position being separated to a second distance from said platen wherein said second distance is greater than said first distance.
Dependencies are inferred from the claim text.