Medicament delivery device

A medicament delivery device for dispensing discrete doses of medicament, the device comprising:

• first and second medicament carriers each comprising said doses of medicament contained in a plurality of individual compartments spaced along a carrier strip and sealed by a sealing layer;
• first and second opening mechanisms each arranged to handle a respective one of the first and second medicament carriers and to open each compartment of the respective medicament carrier by separating the sealing layer from the carrier strip as the medicament carrier is advanced through the device;
• a take-up spool arranged to wind the separated sealing layers thereon to maintain the separated sealing layers in tension, each separated sealing layer having a path of travel between a respective one of the first and second opening mechanisms and the take-up spool;
• and
• a tension control element in contact with each of the separated sealing layers, the tension control element being disposed at a spaced distance from the take-up spool,
• wherein at least a part of the tension control element is arranged to be movable by a biasing force, which is exerted on the tension control element by the separated sealing layers as a result of an inequality in the tensions of the separated sealing layers wound by the take-up spool, to alter a length of the path of travel of each separated sealing layer so as to substantially equalize the tensions in the separated sealing layers.