LINERLESS LABEL DISPENSER

摘要

Linerless labels in a continuous web, in roll form, are dispensed. The roll is mounted for rotation by a vertical shaft, and periodically a drive roller with conveyor tapes wrapped around it is rotated to pull the web from the roll in an amount sufficient to unwind approximately one length of label from the roll. The adhesive face of the web engages the circumferential periphery of the drive roller and the conveyor tapes past the drive roller, the exit roller effecting separation of the leading label from the conveyor tapes. An idler roller engages and tensions the web between the roll and the drive roller, and a knife blade is mounted at about the point that the web leaves the drive roller. The components are disposed so that the web engages at least about 170 degrees of the circumferential periphery of the drive roller, with the adhesive face contacting the drive roller circumferential periphery and conveyor tapes. First and second optical sensors sense marks on the web to start and stop rotation of the drive roller so as to unwind one label at a time from the roll, and the roll is automatically braked to prevent the roll continuing to unwind when driving action by the drive means is interrupted.