Adhesive-tape cutter and adhesive tape

An adhesive tape cutter having a main body provided with a tape support that rotatably supports an adhesive tape roll in which the adhesive tape having one adhesive face is wound like a roll and a cutting section that cuts the adhesive tape pulled out from the adhesive tape roll supported by the tape support,

• wherein between the tape support and the cutting section of the main body there is provided a double-portion forming means that includes adhesive face-side members disposed on a side faced by the adhesive face of the adhesive tape and non-adhesive face-side members disposed on a side faced by a non-adhesive face thereof and that folds at least a longitudinal side edge of a predetermined width of the adhesive tape in a direction that the adhesive face is facing to form a double portion as a non-adhesive portion by pulling out the adhesive tape between the adhesive face-side members with both the members contacting and pressing against the adhesive tape,
• wherein the double-portion forming means is fixed to a holder that is attachable and detachable from the main body that comprises;
• a bending roller as one of the adhesive face-side member that contacts the adhesive face of the adhesive tape except the side edge of the predetermined width to be bent;
• a bending guide block as one of the non-adhesive face-side members that is placed opposite an end face of the bending roller and contacts and presses against the non-adhesive face of the side edge of the predetermined width to be bent, not contacting the bending roller, to sandwich the side edge between the end face of the bending roller and itself and bend the side edge of the predetermined width in the direction that the adhesive face is facing;
• a folding guide block as one of the adhesive face-side members that has a guide portion contacting and pressing against the non-adhesive face of the bent side edge to bend the side edge to be at an acute angle and that is placed on the side faced by the adhesive face of the adhesive tape;
• a sticking means as one of the non-adhesive face-side members that contacts and presses against the non-adhesive face of the adhesive tape having the side edge folded to stick together opposite adhesive faces of the folded adhesive tape;
• the non-adhesive face-side members are supported by an open/close member that is openable and closable, and
• the open/close member is configured to be movable between a closed position where the non-adhesive face-side members contact and press against the adhesive tape through the double-portion forming means and an open position where the non-adhesive face-side members do not, and in the open position, the non-adhesive face-side members such that a path for the adhesive tape be inserted through is opened up.