Abstract: A tape dispenser includes a base and a cutting unit. The base has a receiving portion at one side thereof. The cutting unit is detachably mounted to the receiving portion and includes a main body and at least one cutting blade. The main body has at least one blade-mounting part and at least one tape-contact part located adjacent to the at least one blade-mounting part. The at least one blade-mounting part has a plurality of supporting portions. The at least one cutting blade is mounted to the at least one blade-mounting part at a specific angle and has a plurality of very thin blade teeth arranged in serration, for labor-saving cutting. The supporting portions contact and correspond to the blade teeth in shape, respectively, for strengthening the structure of the blade teeth. The cutting unit is detachable and replaceable when damaged, deformed, or worn out.

Abstract: A cutter assembly has a blade holder, a blade, a slider and a screw-locking device. The blade is moveably mounted in the blade holder and has a moving direction. The blade holder has a bottom and multiple engaging segments disposed on the bottom along the moving direction of the blade. The slider is mounted slidably on the blade holder and connected to the blade. The screw-locking device is mounted on the slider and has a locking bolt and a locking sleeve screwed with each other. The locking bolt has an end selectively engaging at least one of the engaging segments.

Abstract: A cutter assembly has a blade holder, a slider, an automatic locking device, a screw locking device and a blade. The blade holder has a guiding channel defined in the blade holder and having two inner edges. Multiple engaging teeth are arranged in a line along at least one of the inner edges. The slider is mounted slidably on the blade holder relative to the guiding channel. The automatic locking device is mounted on the slider and has a resilient member selectively engaging at least one of the engaging teeth. The screw locking device is mounted on the slider and has a relative travel distance between the screw locking device and the slider. The blade is mounted slidably in the blade holder and connected to the slider.

Abstract: A cutter assembly has a blade holder, a blade, a slider and a screw-locking device. The blade is moveably mounted in the blade holder and has a moving direction. The blade holder has a bottom and multiple engaging segments disposed on the bottom along the moving direction of the blade. The slider is mounted slidably on the blade holder and connected to the blade. The screw-locking device is mounted on the slider and has a locking bolt and a locking sleeve screwed with each other. The locking bolt has an end selectively engaging at least one of the engaging segments.

Abstract: A cutter assembly has a blade holder, a slider, an automatic locking device, a screw locking device and a blade. The blade holder has a guiding channel defined in the blade holder and having two inner edges. Multiple engaging teeth are arranged in a line along at least one of the inner edges. The slider is mounted slidably on the blade holder relative to the guiding channel. The automatic locking device is mounted on the slider and has a resilient member selectively engaging at least one of the engaging teeth. The screw locking device is mounted on the slider and has a relative travel distance between the screw locking device and the slider. The blade is mounted slidably in the blade holder and connected to the slider.