| UNICOR GMBH Patent applications |
| Patent application number | Title | Published |
|---|
| 20120090721 | Plastic Pipe with Bell - A multi-layer bell is formed from the outer shell of a multi-layer pipe in a secondary process, thereby allowing the extrusion process to be conducted at normal speeds. The bell may include a strain limiting membrane fused or mechanically secured between the outer shell extrusion layer and the inner liner extrusion layer, increased hoop or circumferential stiffness. This invention allows the extrusion process to be in its simplest form, with no adjustments to the corrugator or extruder speeds. | 04-19-2012 |
| 20110018176 | METHOD AND DEVICE FOR PRODUCING A DOUBLE-WALLED THERMOPLASTIC CORRUGATED PIPE HAVING A CONNECTING SLEEVE - A method and an apparatus for producing an endless double-walled pipe having corrugated pipe sections and sleeve pipe sections are described. The production is effected by extrusion of an outer tube (Sa), forming the outer pipe of the double-walled pipe, and of an inner tube (Si), forming the inner tube of the double-walled pipe, in a molding passage ( | 01-27-2011 |
| 20100291255 | CORRUGATOR DEVICE WITH A MOULD RELEASE DEVICE - A description is given of a corrugator device for shaping thermoplastic corrugated pipes from a tube of molten plastics material emerging from an extrusion device, with molding jaws | 11-18-2010 |
| 20100291254 | CORRUGATOR DEVICE WITH A GRIPPER - Described is a corrugator device for shaping thermoplastic corrugated pipes out of a molten plastic tube issuing from an extrusion device comprising moving molding jaws | 11-18-2010 |
| 20100247704 | DEVICE FOR PRODUCING THERMOPLASTIC CORRUGATED PIPES - The invention relates to an apparatus for producing thermoplastic corrugated pipes. The apparatus has an extrusion device | 09-30-2010 |
| 20100189838 | INJECTION HEAD FOR A CORRUGATOR FOR THE PRODUCTION OF PLASTICS PIPES - An injection head ( | 07-29-2010 |
