A former head and an apparatus comprising such a former head|纤维成型数据集|制造技术数据集

The invention relates to a former head of the kind which is used for forming， such as dry forming， of a fibrous web， where fibres are supplied to the former head mixed with air via at least one injection inlet. The former head comprising: a) a roller being rotatable in a rotation direction around a rotation axis and comprising: a roller surface surrounding the rotation axis， and a plurality of projections extending outwardly， such as radially outwardly， from the roller surface， b) a screen extending along at least part of the roller surface above the rotation axis， the roller surface and the screen defining therebetween a peripheral gap， and c) the injection inlet， wherein the injection inlet is positioned to conduct the mixture of the fibres and air into the peripheral gap in a delivery direction opposite or substantial opposite to the rotation direction of the roller.