Device and method for applying adhesive to a substrate

A device for applying adhesive to a substrate, comprising:

• an application roller that is rotatable about a vertical axis of rotation of the application roller;
• an installation for dispensing adhesive to the application roller;
• a dispensing region of the application roller for dispensing adhesive from the application roller onto the substrate;
• and
• a doctor blade for wiping excess adhesive from the application roller;
• wherein the dispensing region for dispensing the adhesive from the application roller onto the substrate is located behind the installation for dispensing the adhesive to the application roller and ahead of the doctor blade in a rotation direction of the application roller;
• wherein the excess adhesive wiped by the doctor blade reaches a collection installation located vertically beneath the application roller;
• wherein the installation for dispensing adhesive is configured as a nozzle comprising a slot die having a vertical slot;
• wherein a slot length of the vertical slot is adjustable in a vertical direction that is parallel to the vertical axis of rotation of the application roller;
• wherein the application roller, the installation for dispensing adhesive, and the doctor blade are mounted in a first support that is horizontally guided in a second support and spring-mounted horizontally in a direction of contact of the application roller with the substrate;
• and
• wherein the slot die by way of a horizontal guide is held in the first support.