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
Touch screen tablet
Method for production of a thermoelectric apparatus
Human activity monitoring device
Method and device for monitoring and analyzing signals
Process for the production of electric energy by the excitation and capture of electrons from ground or water sources
Method and apparatus for analysis of histopathology images and its application to cancer diagnosis and grading
Biomarkers of gastric cancer and use thereof
  Randomly Featured Patents
Stem-loop and circular oligonucleotides and method of using
Systems for preparing presentation instruments for distribution
Morphed musical piece generation system and morphed musical piece generation program
Multihop nested tunnel restoration
Controlling update of content of a programmable read-only memory
Data input/output control system
Enhanced sample processing devices, systems and methods
Coater blades and their manufacturing methods
Expansion of shrunk foam particles of propylene polymers
Adjustable sanitary impeller hub