Patent ID: 6382097
Filing Date: 2002-05-07
Classification: B41L

Abstract:
A wrinkle preventing method for preventing a wrinkle on a stencil sheet, the method comprising the steps of:providing a stencil printing machine which includes: a rotary cylindrical drum rotatable about its own axis, the rotary cylindrical drum including an ink-permeable cylindrical circumferential wall having an outer peripheral surface around which a stencil sheet subjected to a stencil making process can be wound; a contact member capable of contacting with an inner peripheral surface of the circumferential wall, the contact member being disposed in the rotary cylindrical drum; and a move mechanism capable of moving the contract member to a contact position at which the contact member is brought into contact with the inner peripheral surface of the circumferential wall or a distance position at which the contact member is spaced with a predetermined interval from the inner peripheral surface of the circumferential wall; discharging the stencil sheet from the rotary cylindrical drum so that the rotary cylindrical drum is placed in a state in which the stencil sheet is not wound around the circumferential wall of the rotary cylindrical drum; rotating the rotary cylindrical drum while placing the contact member at the contact position relative to an ink permeable portion of the circumferential wall; placing the contact member at the distance position relative to the ink permeable portion of the circumferential wall; and winding, around the outer peripheral surface of the circumferential wall of the rotary cylindrical drum, a stencil sheet subjected to the stencil making process.