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
Phosphor adhesive sheet, light emitting diode element including phosphor layer, light emitting diode device, and producing methods thereof
ActRIIB proteins and variants and uses therefore relating to utrophin induction for muscular dystrophy therapy
Organic light-emitting display and method of manufacturing the same
Attribute information providing system
Downlink scheduling in fractional frequency reuse (FFR) systems
Associating objects in databases by rate-based tagging
  Randomly Featured Patents
Sodium sulfur battery or cell with improved ampere-hour capacity
Digital isolation system with hybrid circuit in ADC calibration loop
Transmissive system for characterizing materials containing photoreactive constituents
Door panel
Electronic device carrier
Manufacture of ball nut with internal crossover path for ball recirculation
Apparatus and method for treating surfaces of semiconductor wafers using ozone
Device for blocking stairs
Plug type faucet valve
Ferrochromium slag for uses requiring refractoriness and mechanical strength