A packet header processing engine includes a packet processing unit that is configured to generate the packet header information based on the packet header data. One or more routing matrices configured in at least one programmable device is programmed to interconnect operating as well as optional dummy components on the board so that routing information is erased in the event of sensed tampering. With this device the clearances of the rapier rod with respect to the drive wheel can be performed easily, rapidly and with great precision, so that this device is able to work with a minimum development of heat and wear. Multiple types of pillow inserts having different thickness andor firmness characteristics may be provided, wherein a user is able to select one of the pillow inserts based on the user’s sleep pillow preferences. One of the light emitting device and the light receiving device reciprocably moves integrally with the head, and the other is provided separately from the head.