Patent ID: 8827257
Filing Date: 2014-09-09
Classification: B41F,B65H,G03G

Abstract:
1. A sheet processing device for stapling plural sheets fed from a printing apparatus, said sheet processing device comprising: a supporting plate for supporting said plural sheets to be stapled; a casing disposed over said supporting plate, wherein a sheet conveying channel is formed between said supporting plate and said casing, and each of said plural sheets is transmitted to said supporting plate through said sheet conveying channel in a first direction; a stapler located at a side of said supporting plate for stapling said plural sheets received by said supporting plate, wherein said plural sheets are transmitted to said stapler in a second direction different from said first direction; a protrusion structure extending downward from a lower surface of said casing into said sheet conveying channel, and disposed on a transmission way of said plural sheets to said supporting plate for guiding a front end of each sheet fed from the printing apparatus in said first direction and on the transmission way of said plural sheets to said stapler for flattening corresponding stapled sides of said plural sheets transmitted in said second direction, wherein said protrusion structure has a slant surface so that a transmission path of said plural sheets to said stapler under said protrusion structure is gradually tapered in said second direction; and a swinging arm disposed downstream of said protrusion structure in said first direction, and extending downward into said supporting plate from said casing, wherein said swinging arm is pushed by each sheet fed from the printing apparatus to pivot relative to said casing while depressing the sheet, and said swing arm has a bent part at a free end thereof and is long enough to have the bent part suppress each topmost sheet on said supporting plate after pivoting back for flattening said plural sheets.