Patent ID: 8992634
Filing Date: 2015-03-31
Classification: B29D,D06P,G02B

Abstract:
1. A method of dyeing a plastic lens, comprising the steps of: applying a sublimation dye to a dyeing substrate; pre-holding the dyeing substrate on a single holding member which is provided in advance in a vacuum vessel and includes an open end and a mounting portion provided at the open end, the pre-holding step including mounting the dyeing substrate on the mounting portion over the open end; holding a plastic lens by the holding member at a position above the dyeing substrate; evacuating the vacuum vessel which accommodates the dyeing substrate, the plastic lens and a heating device for heating the dyeing substrate; putting an upper side of the heating device in the open end of the holding member and transferring the dyeing substrate from the holding member to the heating device to hold for dyeing by lowering the holding member or raising the heating device after evacuating the vacuum vessel; passing the heating device which holds the dyeing substrate through the open end and bringing the plastic lens in close proximity to the dyeing substrate on the heating device to set an interval for dyeing by further lowering the holding member or further raising the heating device which holds the dyeing substrate after transferring the dyeing substrate; and dyeing a target surface of the plastic lens with the sublimation dye sublimated from the dyeing substrate by heating the dyeing substrate using the heating device after setting the interval for dyeing.