| 摘要 |
A glue applicator for a labeling machine has the customary glue roller rotating about a vertical axis. A scraper blade is held adjacent the periphery of the roller to remove excess glue from the roller so that a label to which glue is transferred from the roller will not receive a coating of more than desirable thickness. Relatively small blade inserts provide the sharpened edges for scraping the excess glue from the roller. A support member is mounted to a carrier that swings about an axis parallel to the axis of the roller. The blade insert is clamped against the support member by means of a clamping member whose clamping force is developed by bolts that pass through the clamping member and are threaded into the support member. Eccentric elements are provided for adjusting the support member and, hence, the blade insert carried thereon to achieve a uniform and accurate gap between the scraping edge of the blade insert and the periphery of the roller. Blade inserts can be exchanged quickly by simply loosening the clamping bolts, sliding the insert out, sliding a substitute insert in and retightening the clamping bolts. In some embodiments, it is only necessary to reverse the insert to present a fresh scraper edge toward the roller. |
