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Post-processing trimming apparatus and image-forming apparatus

Image Number 4 for United States Patent #7412201.

A post-processing apparatus which has a trimming apparatus for trimming an edge of sheets to make booklets, wherein the trimming apparatus has an inserting means for insertion of sheets into trimming process section of the trimming apparatus, an edge sustaining member and an edge holding member for pinching the vicinity of the edge of the sheet during the trimming process and a shifting means to make the opening size variable for receiving sheets by changing the relative position between the edge holding member and the edge sustaining member and a controller for controlling the shifting means to change the opening size between the edge holding member and the edge sustaining member according to the number of the sheets to be trimmed.

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