To provide an envelope preparing system which prevents the carrying trouble and damage of a device by early determining an overload when the overload is generated in the device during the folding of content paper and discharging the content paper serving as a folding target as an abnormal object.
The envelope preparing system includes: a content formation part 55 forming a content by folding printed content paper; and an envelope formation part 85 forming an envelope while including the content by folding printed envelope paper. The content formation part 55 includes: a thickness detection part 60 detecting the thickness of the content paper; an abutment member 69 switching the folding and discharge of the content paper P1; and a drive control part controlling the operation of the abutment member 69 on the basis of a detection result detected by the thickness detection part 60.
Masakazu Ito
Shunichi Takahashi
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