Resources Contact Us Home
Method and apparatus for making skirtless seals

Image Number 4 for United States Patent #8029428.

A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a single sealing zone, and a weakening zone disposed within the single sealing zone. The single sealing zone may be a heated perforator, and may include a heating wire. The heating wire may be an NiCr wire stitched into the heater, and be disposed on a cap or on the seal bar. The weakening zone may create a line of weakness that is uniform or varies in intensity. The sealing zone may include temperature zones, cartridge heaters, cooling air, or heated air, or a source of ultrasonic, microwave or radiative energy.

  Recently Added Patents
Neurostimulation system
High gradient lens for charged particle beam
Automated tuning in a virtual machine computing environment
Anomalous data detection method
Electronic device with a screen
Package for product
Automobile body
  Randomly Featured Patents
Method and system for electroseismic monitoring of microseismicity
Edgewise bracket wire retaining clip
Preparation of N-(phosphonoacetyl)-L-aspartic acid
Mobile cleaning apparatus for removing debris from the surface of parking lots and the like
Membrane probe with automatic contact scrub action
Portable radio having pivotable antenna
Organic compound and method for producing radioactive halogen-labeled organic compound using the same
Virtual beam system
Photographing lens
Outdoor goal anchor device and method of installing