Patent ID: 8382096

Claim:
A sheet package to be accommodated in a printing apparatus for supplying sheets as print media to the printing apparatus, comprising: stacked sheets; and a package member that includes, at least a rectangular first flat surface portion, covering at least part of a surface on one side in a stacking direction of the stacked sheets, a rectangular first side face portion foldably extended from an end portion of the first flat surface portion, and covering a side face of the stacked sheets, a rectangular second flat surface portion foldably extended from an end portion of the first side face portion on an opposite side of the end portion of the first side face portion connecting to the first flat surface portion such as to face the first flat surface portion and covering another surface on the opposite side of the surface on one side in the stacking direction of the stacked sheets, a rectangular second side face portion foldably extended from an end portion of the first flat surface portion on an opposite side of the end portion of the first flat surface portion connecting to the first side face portion and covering a side face of the stacked sheets, a third flat surface portion foldably extended from an end portion of the second side face portion on an opposite side of the end portion of the second side face portion connecting to the first flat surface portion and formed with an insertion portion to be inserted into a cut portion provided in the second flat surface portion, a rectangular third side face portion foldably extended from an end portion of the first flat surface portion on an opposite side of a direction in which sheets are transferred to the printing apparatus and covering an end face on the opposite side of the transfer direction of the stacked sheets, a first cut-out portion formed in the first flat surface portion at the end portion of the first flat surface portion connecting to the second side face portion, through which light from an optical sensor disposed opposite the first flat surface portion is passed for detecting presence or absence of the sheets, a second cut-out portion formed in the second flat surface portion at a position opposite the first cut-out portion, through which the light from the optical sensor is passed; and a third cut-out portion formed in an end portion on a side of the transfer direction of sheets of the third flat surface portion, wherein an end portion of the third cut-out portion is disposed more toward the opposite side of the transfer direction of sheets than the second cut-out portion, and an end portion on the opposite side of the transfer direction of sheets of the second cut-out portion is disposed more toward the opposite side of the transfer direction of sheets than an end portion on the opposite side of the transfer direction of sheets of the first cut-out portion.