Apparatus for feeding opening devices to be glued on packages containing pourable food products

There is described a sequencing unit (1) operating along a feed path (A) of a number of opening devices (3) for attachment to respective sealed packages of pourable food products; the unit (1) has conveying means (10) for conveying the opening devices (3) arranged in at least one line, and releasable stop means (11) interacting with the opening devices (3) downstream from the conveying means (10) along the path (A); the stop means (11) are normally set to a first configuration, in which they arrest the opening devices (3) along the path (A), and are movable into a second configuration allowing travel of the opening devices (3); and the unit (1) also has push means (12) travelling at predetermined intervals past the stop means (11) to move the stop means (11) from the first configuration to the second configuration, so that the opening devices are fed in sequence and at a predetermined rate through the stop means (11).