Patent ID: 6988439

Claim:
A cutting apparatus comprising: a base for supporting a workpiece thereon; a blade-holding arm mounted rotatably on said base; a blade mounted rotatably on said blade-holding arm and rotatable about an axis; and a light-emitting unit mounted on said blade-holding arm, disposed above said base, and operable so as to project an image line on the workpiece such that said image line extends in a direction parallel to said blade, said light-emitting unit being movable on said blade-holding arm in a lateral direction relative to said blade between a first position, in which said image line projected on the workpiece is disposed at a first lateral side with respect to said blade, and a second position, in which said image line projected on the workpiece is disposed at a second lateral side, that is opposite to said first lateral side, with respect to said blade; wherein said blade-holding arm has a top end and is formed with a through-hole that extends downwardly from said top end, said light-emitting unit including a seat that is mounted movably on said blade-holding arm, and a laser-emitting member, said seat including a hollow block body that has a lower portion received in said through-hole and that defines an inner space therein, and two opposite wings that project oppositely and transversely from two opposite sides of said block body and that are seated on a periphery of said through-hole, said laser-emitting member being mounted in said inner space in said block body so as to project a laser beam onto the workpiece, said wings being respectively formed with two opposite elongated slots that extend in said lateral direction and extending through said wings in a direction generally parallel to said through hole, said periphery of said through-hole being formed with two opposite screw holes that are respectively and vertically aligned with said slots, said cutting apparatus further comprising first screw means that extend through said slots and that threadedly engage said screw holes so as to permit positioning of said light-emitting unit at a desired one of said first and second positions.