Patent ID: 7381002

Claim:
A roll sheet holder which holds a roll sheet wound on a cylindrical sheet core having a through hole opening at both ends and is removably mountable in a tape printer which includes a feeding device which draws the roll sheet to feed an unwound part thereof, and a printing device which prints on the part of the roll sheet fed by the feeding device, wherein the tape printer comprises: an insertion opening through which the unwound part of the roll sheet is inserted in the tape printer; a positioning support member vertically provided in a side end of a bottom of the tape printer so that one side of the positioning support member is positioned substantially in one plane with one side end of the insertion opening; a first positioning groove which is formed in the positioning support member to open upward and at both sides in a direction of a width of the tape printer; and a positioning recess formed with a predetermined depth in the bottom of the tape printer to face a lowermost end of the roll sheet, the recess being rectangular in plan view and long sideways along a direction of width of the roll sheet; and the roll sheet holder comprises: a guide member which is arranged in contact with one end of the roll sheet and has a first extended portion extending downward in a predetermined length to be fitted in the positioning recess when the roll sheet holder is mounted in the tape printer; a positioning holding member which is arranged in contact with the other end face of the roll sheet; the positioning holding member comprises: a positioning rib provided protruding in a longitudinal shape on an outer surface of the positioning holding member at a substantially center of a width thereof, the positioning rib being fitted in the first positioning groove when the roll sheet holder is mounted in the tape printer, thereby positioning the roll sheet holder in place in the tape printer; and a guide part formed on an outer surface of the positioning rib and extending outwards in a predetermined length from each of both sides of the outer surface of the positioning rib to have a larger width than the positioning rib; and the positioning rib will be fitted in the positioning groove while the positioning support member is positioned between the outer surface of the positioning holding member and the guide part.