Plastic bags having drawstrings
Patent 4260003 Issued on April 7, 1981. Estimated Expiration Date: 
September 7, 1999. 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.
September 7, 1999. 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 781821 2799611 3284267 3552639 3794545 InventorApplicationNo. 06/073287 filed on 09/07/1979US Classes:383/72Including drawstring-type securing elementExaminersPrimary: Norton, Donald F.Attorney, Agent or FirmInternational ClassesB65D 33/28 (20060101)B65D 33/16 (20060101) AbstractA drawstring is mounted near the open mouth of a plastic bag by a pressure sensitive tape that freely laterally encloses the drawstring except for projecting free ends, the tape being formed or treated so as to be non-sticky with respect to the drawstring. A high speed production method of making the bags comprises the steps of laying a continuous length of drawstring material across a series of spaced bags, applying strips of pressure sensitive tape to each bag to freely laterally enclose the drawstring length there and severing the drawstring length between bags. | |
