Resources Contact Us Home
Method for sealing zipper assembly to bag making film at three or more points

Image Number 4 for United States Patent #6993886.

A method for sealing a zipper assembly to bag making film at three or more points. The zipper assembly comprises a short zipper flange and a long zipper flange. The short flange is joined to one wall of the package while the long flange is joined to both walls of the package to define a product space in which the product is contained. Both the short and long zipper flanges are sealed to the bag making film at a first sealing station prior to folding of the film. After folding, the long zipper flange is sealed at one or more zones of joinder to the other side of the folded film. If the zipper assembly is attached in proximity to the fold line, then the second sealing operation is performed before filling and the bag is filled through the package bottom. If the zipper assembly is attached near the edge of the web of bag making film, then the second sealing operation is performed after the filling operation.

  Recently Added Patents
Circuit arrangement for a piezo transformer, and method therefor
Method for generating codewords
Dynamically updating privacy settings in a social network
Apparatus and method for weighing an item of mail during transport through a sorting installation and having an anti-vibration device
Sub-resolution assist feature repair
Hybrid coatings and associated methods of application
  Randomly Featured Patents
Azimuth monitoring system
Substituted 1-aminonaphthalenes and stabilized compositions
Extreme temperature, high pressure balanced, rising stem gate valve with super preloaded, stacked, solid lubricated, metal-to-metal seal
Zoom lens
Feedback circuit for radiation resistant transducer
Battery charger
Method and device to seize the end of a roving or sliver and move it to a predetermined position
Device and method for connection to a wireless network
Gas concentrator with improved water rejection capability
Logic circuit having error detection function and processor including the logic circuit