Patent ID: 7255032

Claim:
A puncher comprising: a) a base having: i) two lateral sides, each of the two lateral sides having an inner trench; ii) a pushing base slidably located in the inner trench of the two lateral sides; iii) a knife-holding groove located on a front of the base and communicating with the inner trench of each of the two lateral sides; iv) a rotating shaft rotatably located in the base; v) two pushing rods, each of the two pushing rods is connected at a first end to a back of the pushing base; vi) a pressing handle connected at one end thereof to the rotating shaft and movable between first and second positions, the pressing handle controlling the two pushing rods to move the pushing base between forward and rearward positions; vii) two connection blocks fixedly connected to the rotating shaft, one of the two connection blocks are pivotally connected to a respective second end of the two pushing rods; and viii) a cover pivotally connected to the front of the base and movable between open and closed positions, when the cover is located in the closed position, the cover covering a predetermined portion of the knife-holding groove, the cover having an adjustment knob adjustably connected to a front of the cover; and b) a knife holder inserted into the knife-holding groove and having: i) a pressing plate; ii) a plurality of knives spaced across the pressing plate, the pressing plate is in communication with the pushing base and moves the plurality of knives forward for punching; iii) a paper-receiving groove; and vi) a plurality of wastepaper-withdrawal holes communicating with the paper-receiving groove.