Zippered film and bag
Patent 5823933 Issued on October 20, 1998. Estimated Expiration Date: 
March 20, 2017. 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.
March 20, 2017. 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 ReferencesInventorAssigneeApplicationNo. 821226 filed on 03/20/1997US Classes:493/213, Reclosable means (e.g., valve)53/451, Vertically formed, filled, and sealed tubular package493/210, Assembling of distinct members493/927ReclosableExaminersPrimary: Sipos, JohnAssistant: Day, Christopher W. Attorney, Agent or FirmForeign Patent References
International ClassesB65D 033/24B65D 033/28 383 385 927 923 228 930 929 928 AbstractReclosable bags, plastic film for making the bags, and a method and apparatus for making the bags are disclosed. The bag has a reclosable fastener (26) connected to a single wall of the bag, and the film (55) has a reclosable fastener (26) connected to one side thereof which does not require attachment to any other portion of the film (55) when making a bag. The fastener (26) has a tamper-proof member attached thereto to indicate if the bag has been previously opened. The film (55) can be wound into a roll (54) suitable for use on conventional bag making machines including form, fill, and seal machines or a chain of coilable reclosable bags can be produced therefrom since the fasteners (26) are connected to the web preferably transversely to the bags longitudinal formation axis. The method and apparatus for making the film (55) includes supplying a continuous web of bag making material, feeding from a coil of continuous fastener material enough fastener material to make a single fastener, (26) positioning, cutting, and attaching the fastener (26) to the film (55), with a plurality of fasteners (26) attached thereon.Field of SearchIncluding heat sealingIncluding work advance during heat sealing With means to advance work or product With means to receive interconnected products At separate station from heat sealing With means to advance work or product At separate station from heat sealing And cutting, breaking, tearing, or abrading And cutting, breaking, tearing, or abrading Including supplying indeterminate length work Including work advance during heat sealing By reciprocatory heat sealer Assembling of distinct members Reclosable means (e.g., valve) Closure securing element Plastically deformable Severing of container or container blank from web Partial severance to form interconnected products Severing of container or container blank from web WITH EXTRUDING, DRAWING, OR ATTENUATING Indeterminate length member Plural indeterminate length members Wrapping one member about another member Plural indeterminate length members Of tag or label to tether or to article Including tear strip Vertically formed, filled, and sealed tubular package | |
