Patent ID: 9044978
Filing Date: 2015-06-02
Classification: B41J

Abstract:
1. A heat source unit, comprising: a first heating member configured at one side of a paper at the upstream side of a paper conveyance direction to heat the paper from the one side; a first press roller configured opposite to the first heating member to press the paper from the other side against the first heating member, and meanwhile rotate to convey the paper in the conveyance direction; a second heating member configured at the other side of the paper at the downstream side of the first press roller in the paper conveyance direction to heat the paper from the other side; a second press roller configured opposite to the second heating member to press the paper from the one side against the second heating member, and meanwhile rotate to convey the paper in the conveyance direction; and a heat source opening and closing mechanism, around a rotation shaft of which a plurality of spring members are wound, configured to be opened and closed by rotating an outside unit including the first heating member and the second press roller against an inside unit including the second heating member and the first press roller; wherein the heat source opening and closing mechanism is opened and closed among a closed position where the first press roller faces to the first heating member and the second press roller faces to the second heating member, a first open state in which the load by the outside unit is commensurate with a first elastic force of the spring member, the first open state having a first opening angle maintained by the first elastic force, and a second open state having a second opening angle which is larger than the first opening angle, and the combination force of the load by the outside unit and the a pressure force applied in the first open state in the open direction of the heat source is commensurate with a second elastic force of the spring member.