PURPOSE: To surely prevent the misinsertion of the second and following manuscript forms due to their different sizes by deciding the size of an inserted manuscript form from the number of scan lines measured by an image sensor and returning automatically the second and following forms if their sizes are different from that of the first form.
CONSTITUTION: When a first manuscript form 100 is put into a mail receiver main body 1, the length (size) of the form 100 is decided by deciding whether the scan line number L of the form 100 measured by an image scanner 500 is larger than 2000 or not. When a second form 100 is put into the main body 1 through a form slit 2 with operation of a customer, the length (size) of this form 100 is also decided. Then it is decided whether the sizes of the second and following forms 100 are equal to that of the first form 100 or not. If not, these following forms 100 are automatically returned to the operator.
SHIYOUJI HOKOSHI