Apparatus for sealing a liquid pack
Patent 4546592 Issued on October 15, 1985. Estimated Expiration Date: 
February 4, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 4, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2011198 2415978 2952959 2996855 3220161 3766710 InventorAssigneeApplicationNo. 06/463722 filed on 02/04/1983US Classes:53/373.6, With means to engage cover at spaced points and move apart to flatten seam493/206, By oppositely moving work gripping means493/255, Tube opening and closing53/374.9Pivoted means to close packageExaminersPrimary: Crane, Daniel C.Attorney, Agent or FirmInternational ClassesB65B 51/14 (20060101)B65B 7/06 (20060101) B65B 7/00 (20060101) Foreign Application Priority Data1982-02-11 DEAbstractApparatus for sealing a liquid package made of paper coated with plastic on at least one surface including a pair of extending fingers that can be inserted in the open end of the package to flatten the top edges thereof into a single strip; a pair of welding jaws to seal the top folded seam strip; and drive mechanisms to operate the fingers and jaws. Each extending finger is flat at its engaging end with the package, the narrow edges of which are rounded in cross section, with its longitudinal axis initially perpendicular to the top of the folded seam strip. The fingers are driven down and out to flatten the top edges and form an elongated seam strip whereafter the welding jaws, driven synchronously with the movement of the fingers, seal and strip the seam strip off the extending fingers. | |
