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
Method and apparatus for wireless communication in a mesh network with central control of communication relationships
Semiconductor device including insulating layer of cubic system or tetragonal system
Electronic component mounting machine and operating instruction method for the same
Catheter with multiple electrode assemblies for use at or near tubular regions of the heart
System, method and program product for guiding correction of semantic errors in code using collaboration records
System and method for agitation of multiple specimen containers
Secure data exchange for processing requests
  Randomly Featured Patents
Packaging for audio video cable
Method and apparatus for puncturing code symbols in a communications system
Extendable electrode for gas discharge laser
Number conversion apparatus
Hydroquinone diether having juvenile hormone and acaricide activity
Laser methods for circuit repair on integrated circuits and substrates
3D shutter glasses with mode switching based on orientation to display device
Lift device comprising strap-like rail and bearings fitted to helical strap-like rail
Full-wave driving circuit for multiple electroluminescent cells
Portable timer apparatus, home system and method of timing for an object