Process for effecting thermal sealing of storage cell casings and lids
Abstract
Abstract THERMAL SEALING OF THERMOPLASTIC STORAGE CELL CASINGS AND LIDS IS EFFECTED BY UNIFORM HEATING BY A SINGLE HEATING MEANS TO MELT TEMPERATURE OF MATING EDGES OF THE CASING AND LID AND THEN APPLYING UNIFORM PRESSURE TO THE MOLTEN PLASTIC EDGES TO JOIN THEM WHILE REINFORCING THE CASING IN THE VICINITY OF ITS EDGES. INTERNAL AND EXTERNAL BEADS ARE FORMED AT THE JOINT AND THE EXTERNAL BEAD MAY BE REMOVED TO FORM A MOOTH UNBROKEN LINE AT THE JOINED CASING AND LID. THE APPARATUS INCLUDES A SINGLE HEATING DEVICE MOVABLE INTO UNIFORM DISTANCES FROM ALIGNED EDGES OF THE CASING AND LID TO HEAT SUCH EDGES UNIFORMLY TO MELT TEMPERATURE AND REMOVABLE THEREAFTER TO PERMIT THE MELTED EDGES TO BE BROUGHT TOGETHER AND JOINED AND ALSO INCLUDES REINFORCEMENT MEANS FOR THE CASING EDGES AS WELL AS MEANS FOR MOVING THE MOLTEN EDGES IN ALIGNED CONDITION TOGETHER TO EFFECT THEIR UNION, AND SUBSEQUENT TRIMMING OFF OF THE EXTERNAL BEAD FORMED AT THE JOINT.
Inventors
- 👤 Jean-Paul Gomis
- 👤 Rene Chassoux
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |