Mistie detector and indicator system
US4753464A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1987 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Jun 1, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01F15/148
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A knotter mechanism, utilized on a square baler to encircle the bale with a wrapping material and tie a knot in the material after the wrap is complete, is provided with a detector mechanism for detecting knotter malfunction. The detector mechanism comprises an elongated detector pin which is mounted to pivot in a vertical plane, the pin being mounted on the twine finger of the knotter mechanism so as to pivot therewith in a horizontal plane. The pin is encircled by the wrapping material as the bale is encircled and is within the loop of wrapping material after a knot is tied. As the tied bale is moved rearwardly from the knotter station the detector pin engages the loop of wrapping material and pivots the twine finger thus causing a switch to be actuated. Failure to actuate a switch signals a knotter failure. Upon further movement of the tied bale rearwardly, the loop of wrap material slips over the end of the detector pin and a spring mechanism returns the twine finger and the pin to their initial position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.