An angled coupling for optical fibers can comprise a body having an incoming aperture and an outgoing aperture, from which an incoming hollow waveguide and an outgoing hollow waveguide extend into the body at an angle. Sensors detect the position of the tape and adjust the guides and the head as a function of the position. This guard protects the platen from said marks via a convenient and economical expedient. The actuator button is inhibited from tilting relative to the base when the actuator button is moved into the locked rotational position. Thus, a considerably cheaper packing process is obtained.