Method for making tubular containers
Abstract
Abstract A METHOD FOR MAKING SEAMLESS TUBULAR CONTAINERS HAVING A FIRST END TERMINATING IN A SHOULDER AND THREADED NECK OF A REDUCED DIAMETER WITH INCREASED WITH THICKNESS AND A SECOND OPEN END. THE PROCESS USES A MOLD HAVING AN INTERNAL SURFACE CONFIGURATION CORRESPONDING TO THE EXTERAL CONFIGURATION OF THE DESIRED TUBULAR CONTAINER. SUCTION MEANS DRAWS ELECTROSTATICALLY CHARGED POWDER THROUGH THE MOLD AND PERMITS A PORTION THEREOF TO DEPOSIT ON THE INTERNAL SURFACE, THE AMOUNT OF DEPOSITION BEING PARTIALLY CONTROLLED BY THE SURFACE CONFIGURATION. SUBSEQUENTLY, THE CONTAINER IS HEATED TO FUSE THE DEPOSITED POWDER INTO HOMOGENEOUS MASS, WHILE SUBSEQUENT COOLING PERMITS SHRINKING OF THE CONTAINER AWAY FROM THE MOLD WALLS SUCH THAT IT MAY BE REMOVED BY HAND OR BY MECHANICAL APPARATUS.
Inventors
- 👤 R Szatkowski
Bibliographic Details
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