Patent ID: 8707836

Claim:
A movable blade, which is used for a sheet cutting device to be mounted to a printer for performing printing on a sheet to cut a printed sheet, the movable blade being configured to cut the printed sheet by engaging with a fixed blade, the movable blade comprising: a blade edge portion that engages with the fixed blade; and a pair of guide portions that protrudes toward an engagement starting end side with respect to the blade edge portion at both ends in a width direction of the movable blade, which corresponds to a width direction of a sheet, the pair of guide portions being configured to guide the engagement with the fixed blade at a time of cutting, the movable blade having an outer shape formed by punching a metal plate material with a surface to be engaged with the fixed blade of the metal plate material directed as a punching rear side, wherein the pair of guide portions is curved so as to increase a distance thereof from the fixed blade as approaching the engagement starting end side, wherein the pair of guide portions is further subjected to, after the punching, a processing of removing a corner portion of a part of an outer edge portion on the punching rear side excluding a predetermined leading end region, the predetermined leading end region including the engagement starting end.