Abstract: In a stapler for variably stapling a set or stack of sheets manually inserted through the stapler entrance path with different orientations, there is a sheet guide system with movable guide members automatically differently repositioned into different sheet guiding positions in the entrance path by the sheet stack insertion and its angle of insertion, including switching in between a corner angled stapling alignment position and a linear sheet edge aligned stapling position, respectively differently positioning the sheet stack for stapling. It may include a base plate, a pair of guide elements movably mounted on the base plate, and a fixed registration wall. The guide members in the corner angled stapling position may present opposing converging 45 degree angled edge registration surfaces to the inserted sheet stack. For edge stapling, the same guide members and/or the registration wall may present one, or two straight edge registration surfaces to the inserted stack.

Abstract: In a stapler for variably stapling a set or stack of sheets manually inserted through the stapler entrance path with different orientations, there is a sheet guide system with movable guide members automatically differently repositioned into different sheet guiding positions in the entrance path by the sheet stack insertion and its angle of insertion, including switching in between a corner angled stapling alignment position and a linear sheet edge aligned stapling position, respectively differently positioning the sheet stack for stapling. It may include a base plate, a pair of guide elements movably mounted on the base plate, and a fixed registration wall. The guide members in the corner angled stapling position may present opposing converging 45 degree angled edge registration surfaces to the inserted sheet stack. For edge stapling, the same guide members and/or the registration wall may present one, or two straight edge registration surfaces to the inserted stack.