Method and apparatus for manufacture of corrugated synthetic resin board
Abstract
Abstract THE INVENTION RELATES TO A METHOD AND APPARATUS FOR MANUFACTURE OF CORRUGATED SYNTHETIC RESIN BOARD FROM THE SHEETS OF A MATERIAL CONSISTING OF POLYOLEFIN SYNTHETIC RESIN AND A LARGE QUANTITY, 50 TO 90%, PREFERABLY 70 TO 90% OF AN INORGANIC FILLER SUCH AS GYPSUM (CALCIUM SULFATE) OR CALCIUM SULFITE. THE MATERIAL DEVELOPED BY THE SAME INVENTORS HAS THE PROPERTIES BOTH OF PAPER AND SYNTHETIC RESIN AND IS EXCELLENT ESPECIALLY IS MECHANICAL STRENGTH AND RESISTANCE TO WATER. THE SHEET MADE OF SAID MATERIAL CAN BE FABRICATED INTO CORRUGATED BOARD WITHOUT DETERIORATING ANY PROPERTY, OPPOSED TO THE CONVENTIONAL METHOD AND APPARATUS. ONE FLAT SHEET IS ADHERED TO THE CORRUGATED SHEET BY WELDING OR BY USE OF HOT MELT TYPE ADHESIVES WHILE ANOTHER FLAT SHEET IS ADHERED TO THE OTHER SIDE SURFACE OF SAID CORRUGATED SHEET BY USE OF HOT MELT TYPE ADHESIVES.
Inventors
- 👤 Rinnosuke Susuki
- 👤 Hiroshi Hoshi
Bibliographic Details
Claims Analysis
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| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |