Device and method for applying glue

A method for applying glue onto labels by a glue drum, including the following steps:

• supplying the glue to a receiving space formed by a glue application unit comprising a drum rotatable about a predetermined rotational axis (X), including a glue application unit for applying glue onto an external surface of the rotatable drum, said glue application unit including a receiving space for receiving the glue as well as a supply unit in order to supply the glue to the receiving space, and a discharge unit for discharging glue from the receiving space configured to be filled, said glue application unit being arranged relative to the drum in such a way that any glue present in the glue application unit contacts the drum in a predetermined contact area (B), said glue application unit including a first wall element, which contacts the drum during operation as well as a second wall element which is arranged behind the first wall element in the direction of movement of the drum and which also contacts the drum,
• rotating a drum about a predetermined rotational axis (X), wherein the glue application unit is arranged in such a way that any glue present in the glue receiving space contacts the external surface of the drum,
• applying the glue to a wall delimiting the receiving space, wherein the first and the second wall elements are elastically pressed against the external surface of the drum, the first and second walls elements each having an end support piece whereby to delimit and seal the receiving space, wherein the glue is supplied to the drum from the first wall element to the second wall element, wherein the glue present inside the receiving space is always under substantially constant pressure and wherein the drum applies glue onto the label.