2results about "Book binding" patented technology

To precisely align and bind a bundle of paper with a simple configuration, a printer (100) includes a paper discharge tray (12a) that is configured to accumulate paper (201) discharged from a discharge portion (13b); and a holding member (110) that is provided at a position where the paper (201) discharged from the discharge portion (13b) is stacked. The holding member (110) is configured to be integrated with the paper discharge tray (12a) and includes a pair of side edge guide portions (112,113) that are configured to guide opposite side edges (201b, 201c) of the paper (201). The holding member (110) is configured to be held to be movable to a position of the paper (201) in a width direction (W) where the paper (201) is stored between the pair of side edge guide portions (112, 113) in response to a force acting when the discharged paper (201) comes into contact with the pair of side edge guide portions (112, 113).