A conveyor system comprising: an endless conveyor configured to move in a conveying direction; a plurality of article carriers (91a, 91b, 91c) mounted on the endless conveyor, each article carrier having a carrier frame for bearing an article (92a, 92b, 92c), the carrier frame being pivotally mounted on the article carrier and operable to tip to enable discharge of an article borne on the carrier frame, the conveyor system further comprising a tipping actuator (10, 80) comprising: a trigger member having a contact portion for contacting the article carriers; and an actuation mechanism operable to move the trigger member between a non-contact position, in which the contact portion is positioned out of the path of the article carriers (91a, 91b, 91c) so as to avoid contact therewith, and a contact position, in which the contact portion is positioned in the path of the article carriers (91a, 91b, 91c) to make contact with an article carrier contact portion of the article carrier (91a, 91b, 91c) and effect tipping of the article carrier (91a, 91b, 91c) away from the trigger member, characterised in that: the conveyor system is configured such that, when the trigger member is in the non-contact position, an article carrier (91a, 91b, 91c) adjacent the trigger member is able to move to a partly tipped position in which the article carrier tips only partly towards the trigger member, the article carrier only being able to tip fully once conveyed past the trigger member, wherein the contact portion of the trigger member is received by a portion of the article carrier (91a, 91b, 91c) when the article carrier (91a, 91b, 91c) is in the partly tipped position. an endless conveyor configured to move in a conveying direction; a plurality of article carriers (91a, 91b, 91c) mounted on the endless conveyor, each article carrier having a carrier frame for bearing an article (92a, 92b, 92c), the carrier frame being pivotally mounted on the article carrier and operable to tip to enable discharge of an article borne on the carrier frame, the conveyor system further comprising a tipping actuator (10, 80) comprising: a trigger member having a contact portion for contacting the article carriers; and an actuation mechanism operable to move the trigger member between a non-contact position, in which the contact portion is positioned out of the path of the article carriers (91a, 91b, 91c) so as to avoid contact therewith, and a contact position, in which the contact portion is positioned in the path of the article carriers (91a, 91b, 91c) to make contact with an article carrier contact portion of the article carrier (91a, 91b, 91c) and effect tipping of the article carrier (91a, 91b, 91c) away from the trigger member, a trigger member having a contact portion for contacting the article carriers; and an actuation mechanism operable to move the trigger member between a non-contact position, in which the contact portion is positioned out of the path of the article carriers (91a, 91b, 91c) so as to avoid contact therewith, and a contact position, in which the contact portion is positioned in the path of the article carriers (91a, 91b, 91c) to make contact with an article carrier contact portion of the article carrier (91a, 91b, 91c) and effect tipping of the article carrier (91a, 91b, 91c) away from the trigger member, characterised in that: the conveyor system is configured such that, when the trigger member is in the non-contact position, an article carrier (91a, 91b, 91c) adjacent the trigger member is able to move to a partly tipped position in which the article carrier tips only partly towards the trigger member, the article carrier only being able to tip fully once conveyed past the trigger member, wherein the contact portion of the trigger member is received by a portion of the article carrier (91a, 91b, 91c) when the article carrier (91a, 91b, 91c) is in the partly tipped position.