METHOD AND APPARATUS FOR FORMING FW TYPE BACK SEALS

摘要

ABSTRACTAn improved apparatus and method for providinguniform fin-type back seals with flexible packagingmaterial for use in conjunction with form-fill-and-sealmachines is disclosed which utilizes a moveable tuckerplate disposed between the mated edges of the flexiblepackaging material. When sealing, the tucker plate movesagainst the body of the packaging material and preventslateral movement of such material during the sealingoperation. The tucker plate is joined to a sealingplaten in a manner which maintain a fixed distancebetween the tucker plate and the sealing platen until athreshold sealing pressure is exceeded.