Patent ID: 8016285
Filing Date: 2011-09-13
Classification: B41J,B65D,B65H

Abstract:
1. A sheet package for use in a printing unit, the sheet package comprising: stacked sheets, each sheet as a printing object medium of the printing unit; a package material that covers the outside of the stacked sheets; the sheet package being made up in such a way as to be capable of being set in the printing unit together with the package material in such a way that part of the sheets is exposed; two side wall portion sides being spaced in a width direction of the sheet package that is perpendicular to the direction of a sheet fed from the sheet package; wherein a degree of stiffness of end portions of the two side wall portion sides differing, for use in the printing unit, wherein the printing unit has: the degree of stiffness of the end portion on the one of the two side wall portion sides that is adapted to be brought into contact with the contact portion is greater than the degree of stiffness of the end portion on the other of the two side wall portion sides that is adapted to be pressed by the pressing portion; and the sheet package further comprising: a first portion that is rectangular, and that covers a face on one side in a stacking direction of the stacked sheets; a second portion that opposes the first portion, and that covers a face on the other side in the stacking direction of the stacked sheets; a third portion that is connected to the first portion and to the second portion so as to cover the side face of the sheets stacked in parallel to a sheet conveyance direction, such that the third portion constitutes the other of the two side wall portion sides; a fourth portion that is opposite to the third portion across the stacked sheets and which covers the side face of the sheets stacked in parallel to the sheet conveyance direction, such that the fourth portion constitutes the one of the two side wall portion sides; a fifth portion that is connected to one of the first portion and the second portion, and that covers the side face of the stacked sheets on an upstream side in the sheet conveyance direction; a package cut-in portion provided along a border between (a) one of the first portion and the second portion and (b) the third portion to a predetermined length along the end portion of the third portion, such that the one of the first and second portions can be pressed by the printing unit lid side pressing member so as to press the exposed portion of the sheet against the sheet-feeding roller of the printing unit at the time that the sheet package is set in the printing unit, and the third portion is adapted to be pressed by the pressing portion in such a way that the fourth portion is pressed against the contact portion.