Patent DE-102008032040-A1 (DE)
Title: Coating liquid adhesive on flexible material piece using arrangement having applicator roller and material support, comprises applying the adhesive on material piece over contact line/contact surface between the roller and material piece
Inventor: KOENIG STEFAN
IPC: C09J5/00
Filed: 2008-05-15
Abstract: The method comprises applying a liquid adhesive (1) on a flexible material piece (2) using an arrangement (3), which has an applicator roller (4) and a material support (5) for supporting the material piece to the applicator roller, over a contact line or a contact surface between the applicator roller and the material piece, and laminating the material piece on a carrier part in a lamination-arrangement. The material support is deformingly exposed to the material piece, so that the contact line and/or -surface are interrupted at predetermined positions between the roller and material piece. The method comprises applying a liquid adhesive (1) on a flexible material piece (2) using an arrangement (3), which has an applicator roller (4) and a material support (5) for supporting the material piece to the applicator roller, over a contact line or a contact surface between the applicator roller and the material piece, and laminating the material piece on a carrier part in a lamination-arrangement. The material support is deformingly exposed to the material piece, so that the contact line and/or the contact surface are interrupted at predetermined positions between the applicator roller and the material piece. The applicator roller does not apply adhesive, so that a predetermined adhesive image results on the material piece during applying the adhesive. The material support deforms the material piece, so that the material piece has areas projecting towards the applicator roller and areas receding towards the applicator roller and only the projecting areas contact with the applicator roller. The material support has a predetermined surface contour and retaining means for the material piece. The retaining means are activatable during adhesive application and the material piece adapts itself to the material support in an area of the contact line and/or the contact surface during activating the retaining means to produce the projecting areas and receding areas. The activating of the retaining means leads to a pneumatic suction and adaptation of the material piece at the material support. The material support is introduced by pneumatic negative-pressure bores for the realization of the retaining means. The activating of the retaining means is realized with negative pressure by impacting the negative-pressure bores. A flat template is introduced on the support surface of the material support for producing the surface contour of the material support. The shape of the flat template corresponds to the shape of the resulting adhesive image. An air-impermeable foil is introduced on the material piece with the necessary perforations for applying the adhesive, so that an air-impermeable material piece is pneumatically suckable over the retaining means. The material piece is led to the applicator roller or the applicator roller is led to the material piece. The material support is coupled with a drive and is synchronously displaced to the applicator roller during applying the adhesive. An independent claim is included for an adhesive applying arrangement.