Patent ID: 7677823
Filing Date: 2010-03-16
Classification: B23K,B29C,B29L,B41J

Abstract:
1. A rolled-print-medium holder device for rotatably holding a rolled print medium having a center hollow portion, comprising: an axial member that extends in an axial direction and having both axial ends, the axial member being inserted through the center hollow portion; a holding member fixed to at least one of the both axial ends of the axial member and holding both sides of the rolled print medium; an outer fitting portion provided at either one of the axial member and the holding member, the outer fitting portion having an inner peripheral surface; an inner fitting portion provided at the other one of the axial member and the holding member, the inner fitting portion having an outer peripheral surface, the inner fitting portion being fitted into the outer fitting portion; and a weld portion provided at least at an outer periphery of one of the inner fitting portion and the outer fitting portion, the weld portion being configured on either the inner fitting portion or the outer fitting portion such that the weld portion at least fixes the outer peripheral surface to the inner peripheral surface by ultrasonic welding, the weld portion including a welding rib structured to have a substantially right angle triangle shape prior to welding, and to melt across a corner of the inner fitting portion after welding, wherein the welding rib includes, prior to welding: