技術摘要（英）
An automatic laminating mechanism with constant tension, including a machine body, an adsorption plate, a working plate, a driving mechanism and a feeding wheel, wherein the adsorption plate has an adsorption surface, and the adsorption surface is provided with a plurality of air extraction holes. The air extraction hole is connected to a negative pressure vacuum source. The driving mechanism has two rollers. The two rollers rotate synchronously and have different rotation directions. The supply wheel is provided with a label roll, and the label roll is used to cover the adsorption surface. The suction force of the negative pressure vacuum source is absorbed and driven by the two rollers; when the two rollers drive the label roll forward against the suction force, the label roll between the two rollers and the adsorption surface will have a fixed Tension, so the label roll will not be stretched too much, causing label misalignment and glue overflow and sticking.