Motor-driven tape cutter

A motor-driven tape cutter of the type including a cutter body having front and rear sides at longitudinal ends of said cutter body, a cavity elongated in the longitudinal direction on a top side of said cutter body, a reel provided at a longitudinal rear end of the cavity for supporting a ring-like roll of adhesive tape, a feed roller provided at a longitudinal front end of the cavity for peeling and reeling out the leading end of said adhesive tape over a predetermined length, a backing roller and a presser roller adapted to grip the unreeled tape portion from opposite sides for straightening warping of said tape, a cutter blade for cutting the unreeled tape portion, a motor for driving said feed roller and said backing roller, a switch for actuating said motor, and a switch operating means adapted to close said switch in relation with a tape cutting operation thereby reeling out a predetermined length of the ensuing tape portion, characterized in that said motor-driven tape cutter comprises:

• a cutter blade holder pivotally mounted on the front side of the cutter body to openably close a longitudinal front end portion of said cavity and at least part of said feed, backing and presser rollers, and supporting said cutter blade and said presser roller thereon, said cutter blade and said presser roller being moved away from said feed and backing rollers when said cutter blade holder is opened;
• wherein said holder is formed in an inverted L-shape at the longitudinal front end portion of said cavity, said holder being pivotally connected at a lower end portion thereof to said cutter body through a shaft, to permit said holder to be swung forward into an open position, said holder supporting said cutter blade and said presser roller thereon, said cutter blade and said presser roller being further from said feed and backing rollers when said holder is opened than when said holder is closed,
• wherein said holder is provided with projections on a lower end portion of said inner surface, that are fittingly engageable in circumferential grooves on said backing roller when said holder is closed and when said holder is open, thereby preventing said adhesive tape on said backing roller from being caught and wound on said backing roller.