Resources Contact Us Home
Fabrication of box parts from plastic material

Image Number 12 for United States Patent #3977307.

Box parts such as box bottoms and box lids are fabricated from notched blanks of plastic sheet material.Relatively large boxes can be fabricated and the blank feed mechanism is actuated by a crank mechanism that runs at twice the speed of a main, one revolution per cycle drive shaft. An extension blank pusher can be added to produce smaller boxes. The tab folders have solvent applicators formed as grooved metal bars associated with a centralized solvent delivery and recovery system. The transverse folding dies are heated with a flexible, rope-like heating element to facilitate changes in die length. The feeding apparatus includes cam operated, vacuum cup lifter arm assemblies which lift the top blank from a stack and present it to vacuum cups on the feed pushers. These assemblies are longitudinally adjustable. The anvils that cooperate with the tab folders have heated bodies, but their clamp surfaces are insulated from the bodies.

  Recently Added Patents
Autonomous downlink code selection for femto cells
Universal tablet and smartphone holder
Luggage cart
Magnesium metal-air battery
Bit error mitigation
Process to extract quassinoids
Vehicles with electric motor
  Randomly Featured Patents
Process and apparatus for gas separation
Nose airway device
Juvenile swing apparatus having motorized drive assembly
Image processing system and method for converting YCbCr data composed of luminance and chroma into RGB data of three primary colors
Integrated electrical circuit with passivation layer
Circuit and method for cancelling nonlinearity error associated with component value mismatches in a data converter
Transformable flashlight apparatus
Intermediate transfer with high relative humidity papers
Using message passing interface (MPI) profiling interface for emulating different MPI implementations