PURPOSE:To make it possible to mount a packing sheet easily in a short period of time, by combining a pressing member with a sheet-attaching frame which is equipped with a flange section and provided in a grooved section of a blanket body of a printer. CONSTITUTION:The packing sheet mounting frame of U-shape section, which is provided with flange sections 10 and 11 of such a shape as to be fixed by allowing a pressing member 14 to fit in, is provided in a groove 2 of a blanket body. After fitting in a packing sheet 5 in such a manner as to move it along the inside surface of the mounting frame 9, by allowing tips 18 and 16 of the platelike pressing member 14 to be engaged with the flange sections 10 and 11 of the mounting frame 9, it is fitted to the mounting frame 9, and the packing sheet 5 is stopped. Further, it is possible to easily take the packing sheet 5 out of the mounting frame 9 simply by pulling its tip 22 toward an arrow 21.
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