专利名称：METHOD AND APPARATUS FOR
PRODUCING VALVE BAGS
发明人：PANSIER, Donald, J.,HOLTZ, Kurt,
R.,HATHAWAY, John, M.,WINICKI, Greg, S.
申请号：EP03778074.9申请日：20031031公开号：EP1572442A2公开日：20050914
摘要：The present invention relates to a method and apparatus for folding andsealing a web of material to form an item with a contoured seal such as a valve bag.Folding apparatus form the web of film into a continuous tubular web having upper andlower sections, a closed side and an open side. The open side has two folded flaps thatextend into an inside area of the tubular web. A longitudinal sealer includes a floatingsealer located inside the tubular web. The floating sealer and its contoured heatingelement are selectively and intermittently pressed against the overlapping flaps to forma contoured seal that bonds the flaps together. The contoured seal defines a self-sealingvalve port through which product is poured to fill the bag. Pairs of repelling magnetsbiasingly elevate the floating sealer above the overlapping flaps when the longitudinalsealer is in its release position. The sealer \"floats\" inside the continuous tubular web sothat the web can be intermittently drawn past the floating sealer with a minimal amountof drag.
申请人：Amplas, Inc.
地址：200 North Packerland Drive Green Bay, Wisconsin 54307 US
国籍：US
代理机构：Sajda, Wolf E.
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