Patent ID: 7306387

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; and a 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; the roll sheet holder comprises: a positioning holding member which is arranged in contact with one end face of the roll sheet; 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 so that the positioning rib is fitted in the 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 edge surface of the positioning rib toward a direction for the positioning rib to protrude from the positioning holding member and extending outwards in a predetermined length from each of both sides of the outer edge surface of the positioning rib; and the positioning rib is fitted in the positioning groove while the positioning support member is caught in a space between the outer surface of the positioning holding member and an inner surface of the guide part.