Class / Patent application number | Description | Number of patent applications / Date published |
264505000 | Corrugating | 6 |
20080296810 | METHOD AND APPARATUS FOR CORRUGATING AND WINDING UP ROLLS OF PLASTIC FILM - A method and an apparatus for corrugating and winding up rolls of a plastic film. The plastic film is corrugated as it is continuously wound onto a roll, by a film drawing drum conformed with a plurality of longitudinally extending grooves to perform open-end corrugation or folds which extend crosswise the film; the plastic film is corrugated crosswise, causing the same film to penetrate into the grooves of the drawing drum by suction of air through a plurality of suction holes which open out into the grooves of the drum. | 12-04-2008 |
20090295043 | IN-MOLD PUNCH APPARATUS AND METHODS - A mold is provided for forming a continuously-extruded parison into a corrugated pipe. The mold includes a mold housing having a plurality of bores, a mold cavity having a plurality of annular corrugations, and a plurality of punches. Each punch is disposed in one of the bores and aligned with one of the annular corrugations of the mold cavity. Each punch is also configured to form an aperture in a corrugation of a corrugated pipe in the mold. A continuous extrusion blow molding system and a method are also provided for forming a hollow plastic product and punching a continuously-extruded, blow molded product before it is released from a mold. | 12-03-2009 |
264506000 | Of a tubular preform | 4 |
20100007064 | APPARATUS AND METHOD FOR MANUFACTURING HOLLOW TUBULAR MEMBERS - A method of forming hollow tubular members may include providing a mold defining a surface corresponding to a configuration of the hollow tubular member. A fabric material may be placed in the mold for bonding with a resin to form the hollow tubular member. A bladder may be placed in the mold next to the fabric material to form a substantially air tight region around the fabric material. A pump may be used to apply a sub-atmospheric pressure in the substantially air tight region and thereby press the fabric material against the mold. The sub-atmospheric pressure may also be used to draw the resin material into the mold in contact with the fabric material. Once the resin and fabric material have adequately cured, the hollow tubular member may be removed from the mold. | 01-14-2010 |
264508000 | Continuous or indefinite length | 3 |
20090174123 | Method and Device for Manufacturing a Double-Walled, Thermoplastic Tube with a Connecting Sleeve - In at least one method for manufacturing a double-walled, thermoplastic tube with a connecting sleeve, which enables precise and complete moulding of the connecting sleeve by simple means, it is provided that a) a first tube ( | 07-09-2009 |
20100102489 | METHOD AND DEVICE FOR THE CONTINUOUS PRODUCTION OF A PLASTIC COMPOUND PIPE COMPRISING A PIPE SOCKET - Into a molding path moving in a direction of conveyance is extruded an internal tube from a first extruder and an external tube from a second extruder, the external tube being concentric with the internal tube. During the production of a normal compound pipe, the smooth internal tube is welded together with the external tube which is provided with transverse grooves. At the transition from the normal compound pipe to the expanded pipe socket, the extruder speed of the first extruder is increased from a speed n1,1 to a speed n1,2. During the production of the pipe socket, the speed of the first extruder is reduced to a speed in1,3, wherein n1,2>n1,3>n1,1 applies. | 04-29-2010 |
20100252963 | SYSTEMS AND METHODS FOR COOLING MOVING MOLDS - A mold cooling system is provided for cooling a polymer product shaped in a mold. The mold cooling system includes a moving manifold having a cooling fluid supply and a cooling fluid return; and a mold housing having a mold surface that defines a cavity. The mold housing has a connector configured to receive the cooling fluid supply and cooling fluid return of the moving manifold; and a passageway that extends through the mold housing adjacent to the mold surface, the passageway connecting the cooling fluid supply and the cooling fluid return when the moving manifold is received in the connector. A method is also provided for cooling an extruded, blow-molded product before the product is released from a mold. | 10-07-2010 |