A machine (1) and a method for thermobonding using an emission of electromagnetic waves (13), for example microwaves, to activate one or a plurality of adhesive layers located between a support and one or a plurality of layers of flexible covering, through a bed of particles (4) fluidized by a humidified gas. A multi-layer upholstery item including at least one non-permeable layer and produced in a single operation is also described.

A method for bonding components to each other according to this invention bonds, to a plate-shaped member or a shaft, an ultraviolet-curable adhesive cured by irradiation with ultraviolet rays and a wavelength conversion element which emits ultraviolet rays by irradiation with X-rays. The plate-shaped member is brought into contact with the shaft through a bonding layer formed by the ultraviolet-curable adhesive and the wavelength conversion element. The X-rays are transmitted through the plate-shaped member or the shaft to the bonding layer located between the plate-shaped member and the shaft to cure the ultraviolet-curable adhesive.

A machine (1) and a method for thermobonding using an emission of electromagnetic waves (13), for example microwaves, to activate one or a plurality of adhesive layers located between a support and one or a plurality of layers of flexible covering, through a bed of particles (4) fluidized by a humidified gas. A multi-layer upholstery item including at least one non-permeable layer and produced in a single operation is also described.

Method for manufacturing a composite work piece for a drug delivery device, comprising the steps: Providing a first work piece part 1 and a second work piece part 2, arranging both work piece parts 1, 2 with respect to each other in such a way that both work piece parts 1, 2 are in mechanical contact with one another in a contact area 3, irradiating a surface of the first work piece part 1 with electromagnetic radiation, thereby softening the first work piece part 1 and/or the second work piece part 2 in a region adjacent to the contact area 3, and joining the first work piece part 1 to the second work piece part 2 in the contact area 3 for the composite work piece. Furthermore, a composite work piece for a drug delivery device is provided.

A joining apparatus includes a preheating device heating a stage in noncontact before joining, thereby preheating at least a first member of a workpiece. The preheating device includes a light source that faces a side surface of the stage and emits heating light for heating the stage; and a reflecting surface that has a hood shape and covers the light source from a side opposite to the side surface. The reflecting surface reflects, toward the side surface, light that has been reflected by the side surface among the heating light.