Band sealer
Abstract
Abstract THIS INVENTION RELATES TO A BAND TYPE HEAT SEALER FOR SEALING THE CLOSURE FLAPS OF WAX COATED CARTONS AND THE LIKE AND THE METHOD OF SEALING THE CARTON. THE SEALER INCLUDES A HEATING ELEMENT IN FACE CONTACT WITH A BAND OF HEAT CONDUCTIVE MATERIAL SUCH AS STAINLESS STEEL CAPABLE OF TRANSMITTING SUFFICIENT HEAT TO PENETRATE THE OUTER LAYER OF PAPERBOARD AND TO MELT THE COATING BETWEEN THE OUTER LAYER AND AN INNER LAYER OF PAPERBOARD. THE SEALER INCLUDES A COOLING ELEMENT IN CONTACT WITH THE BAND CAPABLE OF REDUCING THE TEMPERATURE SUFFICIENTLY TO BAND THE TWO LAYERS TOGETHER. THE SEALER ALSO INCLUDES A SECOND HEATING ELEMENT IN CONTACT WITH THE BAND CAPABLE OF HEATING THE SURFACE OF THE OUTER LAYER OF COATED PAPERBOARD SUFFICIENTLY TO FREE THE COATING FROM THE BAND AND TO GLAZE THE OUTER SURFACE OF THE COATING ON THE OUTER LAYER, THE HEAT PROVIDED BY THE SECOND HEATING ELEMENT BEING INSUFFICIENT TO PENETRATE THE OUTER LAYER OF PAPERBOARD AND AFFECT THE BAND BETWEEN THE LAYERS OF PAPERBOARD.
Inventors
- 👤 Iver L Nelson
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |