Automatic roller band filter
Abstract
Abstract IN AUTOMATIC ROLLER BAND FILTER ASSEMBLIES OF THE TYPE IN WHICH A FILTER BAND WOUND ON A FREELY-ROTATABLE BOBBIN IN AN UPPER PORTION IS PULLED DOWN THROUGH A FILTERING INTERMEDIATE PORTION BY A DRIVEN BOBBIN MOUNTED IN A LOWER PORTION, A PROBLEM EXISTS IS ENSURING THAT AN ADEQUATE SEAL IS PROVIDED AT THE EDGES OF THE FILTER BAND DURING ITS DOWNWARD TRAVEL THROUGH THE INTERMEDIATE ZONE. THIS IS PROVIDED ACCORDING TO THE INVENTION BY THE PROVISION OF GIRDER-SHAPED MEMBERS EXTENDING FROM THE UPPER TO THE LOWER PORTIONS IN ASSOCIATION WITH A RIGHT-ANGLED PRESSURE PLATE MOUNTED ON THE SAID GIRDER MEMBER WHEREBY A SEALING SURFACE OF THE SAID SEALING MEMBER MAY BE MOVED ONTO THE FILTER BAND PASSING OVER THE SAID GIRDERSHAPED MEMBERS. IN A PARTICULAR EMBODIMENT OF THE INVENTION THE SAME GIRDER-SHAPED MEMBERS ARE HAT-SHAPED MEMBERS, AND THE RIGHT-ANGLED SEALING MEMBERS ARE MOUNTED TO ENGAGE IN SLOTS IN THE GIRDER MEMBERS TO ALLOW THE SAID MOVEMENT TO AND FROM A SEALING POSITION.
Inventors
- 👤 Gerhard Max Neumann
Bibliographic Details
Claims Analysis
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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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |