Collapsible bag with square ends formed by triangular portions
Patent 4790029 Issued on December 6, 1988. Estimated Expiration Date: 
June 5, 2007. 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.
June 5, 2007. 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 3119548 Plastic bag and method of manufacture Flexible container for transportation and storage of bulk material Method of treating inflammation Collapsible receptacle with prefabricated lift loops and method of making Flexible container Large bulk bag Patent #: 4596040 InventorsAssigneeApplicationNo. 07/058924 filed on 06/05/1987US Classes:383/24, Closed loop222/105, With casing or support222/181.3, Supported on vertical wall by container integral with wall or by a plate support means383/117, Woven or mesh-type material383/121, END STRUCTURE (E.G. BOTTOM)383/36, WITH INTEGRAL FUNNEL383/41, WITH PLURAL ACCESS OPENINGS383/67, For access opening in bag bottom383/904, FILLING TUBE383/906DISPENSING FEATUREExaminersPrimary: Price, WilliamAssistant: Weaver, Sue A. Attorney, Agent or FirmInternational ClassesB31B 23/00 (20060101)B31B 19/00 (20060101) B31B 19/84 (20060101) B65D 88/16 (20060101) B65D 88/00 (20060101) AbstractA collapsible bag and method of making it from blanks of a flexible material which are cut from an elongate web substantially without wasting any material between adjacent blanks. Each blank has a circumferentially continuous central portion and four substantially identical isosceles triangular portions at each end of the blank. Adjacent sides of adjacent triangular portions are connected together to provide, when the bag is expanded or filled, generally square ends which are interconnected by generally rectangular side walls. An access opening is provided in an end of the bag by terminating the connections of its triangular portions short of their apexes. Preferably, a spout is received in the access opening and connected to the triangular portions.Field of SearchLIFTING OR SUSPENDING ELEMENT (E.G., HANDLE)Unitary with bag (e.g., element formed by hand hole) Loop extending between opposite walls Closed loop WITH STACKING FEATURE WITH INTEGRAL FUNNEL WITH PLURAL ACCESS OPENINGS For access opening in bag bottom Woven or mesh-type material Pleated or gusseted END STRUCTURE (E.G. BOTTOM) Overlapping extensions of opposed walls Extension formed by cuts in bag wall FILLING TUBE DISPENSING FEATURE Including reinforcement or stress distribution means attached to or adjacent element | |
