A device for orienting objects, comprising: - a support surface movable along at least one length of a selection path and suitable to receive the objects having a first orientation, wherein a reference side of the object faces in a predetermined reference direction, - a feeder to feed the objects on the support surface at a starting point of the selection path, - selection means (9, 10) configured to prevent the objects with an orientation that is different from the first orientation from being received onto the support surface, or to eject the objects with an orientation that is different from the first orientation from the selection path, so as to obtain, at an output point of the selection path, a sequence only of objects having said first orientation, - a build-up channel having an input opening connected to the output point of the selection path, an output opening, and a guide surface system extending from the input opening up to the output opening, so as to receive the objects with the first orientation in the input opening and to guide the received objects in a single row and having all the same first orientation from the input opening to the output opening, - conveyor means conveying each single object in the build-up channel towards the output opening so as to form at the output opening a single row of objects brought close to each other and all having the same first orientation, - a sequence of alveoli movable along a orienting path extending from a receiving point connected to the output opening of the build-up channel up to a release point, so that the build-up channel feeds in each of the alveoli a single object with the first orientation and the alveoli transport all the objects received with the same first orientation from the receiving point to the release point, - a friction surface projecting in the orienting path so as to engage the objects received in the alveoli and, due to the relative movement between the alveoli and the friction surface, rotate the objects about a reference axis thereof, - an abutment surface extending along an alignment length of the orienting path and forming an end-of-rotation abutment for the objects that reached a second orientation, in which the object is rotated about the reference axis by a predetermined angle with respect to a second predetermined reference direction, characterized in that, at the release point all objects have a same first orientation wherein a reference side of the object faces in a predetermined reference direction, and a same second orientation in which the object is rotated about the reference axis by a predetermined angle with respect to a second predetermined reference direction. - a support surface movable along at least one length of a selection path and suitable to receive the objects having a first orientation, wherein a reference side of the object faces in a predetermined reference direction, - a feeder to feed the objects on the support surface at a starting point of the selection path, - selection means (9, 10) configured to prevent the objects with an orientation that is different from the first orientation from being received onto the support surface, or to eject the objects with an orientation that is different from the first orientation from the selection path, so as to obtain, at an output point of the selection path, a sequence only of objects having said first orientation, - a build-up channel having an input opening connected to the output point of the selection path, an output opening, and a guide surface system extending from the input opening up to the output opening, so as to receive the objects with the first orientation in the input opening and to guide the received objects in a single row and having all the same first orientation from the input opening to the output opening, - conveyor means conveying each single object in the build-up channel towards the output opening so as to form at the output opening a single row of objects brought close to each other and all having the same first orientation, - a sequence of alveoli movable along a orienting path extending from a receiving point connected to the output opening of the build-up channel up to a release point, so that the build-up channel feeds in each of the alveoli a single object with the first orientation and the alveoli transport all the objects received with the same first orientation from the receiving point to the release point, - a friction surface projecting in the orienting path so as to engage the objects received in the alveoli and, due to the relative movement between the alveoli and the friction surface, rotate the objects about a reference axis thereof, - an abutment surface extending along an alignment length of the orienting path and forming an end-of-rotation abutment for the objects that reached a second orientation, in which the object is rotated about the reference axis by a predetermined angle with respect to a second predetermined reference direction,