|
2022
|
Invention
|
System and method for mold block exchange on return track. A system and method for replacing or s... |
|
2020
|
Invention
|
Finned mold block. Mold blocks of a pipe molding corrugator are provided with enhanced cooling ca... |
|
2019
|
Invention
|
A die head and die tooling spider with spider legs having curved flow guides. The present inventi... |
|
|
Invention
|
Finned mold block with connecting ports. Mold blocks of a pipe molding corrugator are provided wi... |
|
2016
|
Invention
|
Pulsating pipe mold with spigot connector. A pulsating corrugator is provided with at least one s... |
|
|
Invention
|
Two stage coupling for corrugated pipe. A pipe connection used in corrugated pipe includes a male... |
|
2015
|
Invention
|
Foam filled corrugated pipe. A double or triple wall corrugated pipe includes a series of cavitie... |
|
|
Invention
|
Material standard testing for extrusion of plastic. A sampling connection is provided between an ... |
|
|
Invention
|
Apparatus and method for identifying thermal expansion in a pipe corrugator. Pipe corrugators hav... |
|
|
Invention
|
Pipe coupling tolerant of pipe movement. A pipe connection used in corrugated pipe includes a mal... |
|
2014
|
Invention
|
Method for forming inline triple wall coupling connector. A pipe coupling for triple wall corruga... |
|
|
Invention
|
Mold block return. A two stage mold block transfer station is used at the exit of a moving mold t... |
|
|
Invention
|
Mold block with improved air cooling. Mold blocks for the manufacture of corrugated plastic pipe,... |
|
|
Invention
|
Improved air pressure control for corrugator. In the manufacture of double-walled corrugated extr... |
|
|
Invention
|
System and method for identifying thermal expansion issues in a corrugator. Pipe corrugators havi... |
|
2009
|
Invention
|
Die tooling for extruding tubular product. Die tooling is formed by forming a series of passages ... |
|
|
Invention
|
Non-circular pipe profile. A corrugated pipe having a non circular in cross section profile and a... |
|
2008
|
Invention
|
Double walled corrugated pipe section with pipe coupling. A corrugated double wall plastic pipe w... |
|
|
Invention
|
Pipe cut-off apparatus. A pipe cutting apparatus includes a machine base having a first machine t... |
|
2007
|
Invention
|
Pipe extruding system with cooling plug separation. The pipe molding system includes a separable ... |
|
|
Invention
|
Alignable cooling plug for extruder. A molding apparatus for the manufacture of pipe advantageous... |
|
2006
|
Invention
|
Cooling plug with improved vacuum channels. An improved cooling plug uses angled vacuum channels ... |
|
2005
|
Invention
|
Continuous blow molding process for large capacity containers. A method and apparatus for the man... |
|
|
Invention
|
Pipe forming apparatus for double walled pipe. The pipe forming apparatus provides for pressurizi... |
|
2004
|
Invention
|
Method of forming corrugated pipe with a pipe spigot seal seat. A piece of corrugated pipe cut fr... |
|
|
Invention
|
Molding apparatus with die tooling having plastic flow sensors. A molding apparatus includes die ... |
|
2003
|
Invention
|
Pipe molding system with vacuum and temperature controls of cooling plugs. A pipe mold produces p... |
|
|
Invention
|
Externally cooled moving mold. A molding apparatus includes a moving mold for shaping molten plas... |
|
|
Invention
|
Mold tunnel formed by multiple mold sections. A pipe molding apparatus comprises a moving mold tu... |
|
|
Invention
|
Method and apparatus for analyzing separation between spaced surfaces using magnetic field intens... |
|
|
Invention
|
Flow distributor for die tooling of pipe mold equipment with remote extruder. Equipment used in t... |
|
2002
|
Invention
|
Pipe molding apparatus with mold tunnel air turbulence. An extruding apparatus which extrudes con... |
|
|
Invention
|
Method of producing multiple pipe pieces with spigots from a single length of plastic pipe. A pie... |
|
|
Invention
|
Molding apparatus with mold blocks having face adjustment. A pipe molding apparatus includes a pl... |
|
|
Invention
|
Molding apparatus with external mold block cooling. A mold block for use with other mold blocks i... |
|
2001
|
Invention
|
Molding apparatus with reciprocating mold tunnel capable of forming different products shapes. A ... |
|
|
Invention
|
Pipe forming apparatus for varying the volume of plastic along the pipe wall.. Apparatus for form... |
|
|
Invention
|
Method and device for manufacturing a double-walled, thermoplastic tube with a connecting sleeve.... |
|
2000
|
Invention
|
Pipe mold with multiple sources of plastic supply. A pipe molding apparatus uses multiple supplie... |
|
|
Invention
|
Pipe molding apparatus with mold block replacement to produce variation in pipe shape. A pipe mol... |
|
|
Invention
|
Pipe mold with compensation for pipe shrinkage. Pipe molding apparatus having a moving mold tunne... |
|
|
Invention
|
Rotating disk extruder. An extruder for use in a plastic extrusion process comprises a plurality ... |
|
|
Invention
|
Metallic pipe and method of making same. In a pipe made from a plurality of pipe sections, at lea... |
|
1999
|
Invention
|
Tube wall cutting tool. A cutting tool which is used to cut through wall of a hollow plastic pipe... |
|
|
Invention
|
Pipe with composite wall construction and method of making same. A pipe having a composite wall c... |
|
|
Invention
|
Tube cutting device. A tube cutting device produces a plurality of cuts spaced around tubing pass... |
|
|
Invention
|
Pipe with coupling conforming to pipe diameter. A plastic pipe has a multiple layer wall (1) cons... |
|
|
Invention
|
Molding apparatus with mold block replacement system. A molding apparatus which is used in a cont... |
