Patent ID: 6418849
Filing Date: 2002-07-16
Classification: B41C,G03F

Abstract:
A sheet fixing device for holding a sheet in a state in which the sheet is wound around a peripheral surface of a rotation drum, the sheet fixing device comprising:a clamp portion disposed along an axial direction at one portion of the peripheral surface of the rotation drum, at least one of a leading end portion and a trailing end portion of the sheet adapted to be nipped between the clamp portion and the peripheral surface of the rotation drum; and a fixing element for fixing the clamp portion to the peripheral surface of the rotation drum at each of a plurality of support points along an axial direction of the rotation drum, wherein when the clamp portion is fixed to the rotation drum by the at least one fixing element, if the pitches between the support points at which the clamp portion is fixed to the rotation drum are L1 (1) . . . L1 (n) where n is an integer not less than 1, and the pitches between each of the two end portions of the clamp portion and the support point closest to the respective end portion thereof are L2(1) and L2(2), L1(1) . . . L1(n) and L2 (1) and L2 (2) are set so that the maximum deformation amounts &Dgr;L1 (1) . . . &Dgr;L1 (n) and &Dgr;L2 (1) and &Dgr;L2 (2) for the respective pitches during the rotation of the drum are substantially equal.