| 摘要 |
An apparatus and related method for sealing paperboard cartons with overlapping flanges on the side panel and cover in a continuous operation is disclosed. At least one of the flanges is an inverted U-shaped flange extending outwardly from the side of the carton as the carton is moved along a longitudinal feed path by a conveyor. Adhesive is provided between the flanges and the flanges are pressed together by upper and lower rotary members; the lower member including an inwardly projecting segment mating with the underside of the inverted U-shaped flange so that the sealing can proceed without interference with the depending portions of the U-shaped flange. The projecting segment is mounted on a disc positioned outboard of the feed path so as to provide touch contact for self centering of the carton. The segment on the lower disc is elongated in the direction of the feed path and includes a series of ridges on the pressure face to increase the sealing effect. The disc operates at a speed faster than the conveyor which includes pusher lugs so as to allow release of the carton from the conveyor during the sealing operation. The height of the sealing members is adjustable in unison to accommodate cartons of different depth. A roller forms the upper rotary member and is pivotally mounted on an arm to allow floating action and easy manual release for interruption of the sealing operation.
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