Invention Grant
US08776650B2 Punch unit, sheet post-processing apparatus having the same, and method of punching sheets 有权
打孔单元,具有该打孔单元的片材后处理装置,以及冲压片材的方法

Punch unit, sheet post-processing apparatus having the same, and method of punching sheets
Abstract:
A hole punch unit has a punching section, a longitudinal registering mechanism, and a transverse registering mechanism. The registering mechanisms incline the punching section in accordance with a skew of a sheet. The punching section thus corrected in position punches the sheet. The punching section is corrected in position, at both the leading edge of the sheet and the trailing edge thereof, thus increasing the precision of positioning the punching section and shortening the time required to position the punching section.
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