Material edge detecting apparatus
Abstract
Abstract A material edge detecting apparatus for electrically detecting the edge of a material such as a sheet by sensing the change in electrical resistivity between a sheet support and the sheet edge and in response thereto generating a signal. In one application, the detecting apparatus is embodied in an aligning or registration mechanism in which a sheet is supported on a sheet support such as a conveyor or the like constructed of a material having an electrical resistance which is detectably different than the resistance of the sheet. A moving mechanism is provided for moving a frame supporting the detecting apparatus and an object such as a cardboard box spaced from the sheet toward the sheet for aligning the sheet and box. The detecting apparatus electrically senses a change in resistivity when a portion thereof engaged the edge of the sheet, and in response thereto substantially simultaneously disables the moving mechanism with the box precisely in register with the sheet.
Inventors
- 👤 C Gibbons
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |