Mold clear detector
US4412798A · kind A · utility
6Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1981 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Nov 9, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/7626
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for detecting the retention of non-ejected parts in the cavity of a plastic molding machine and inhibiting the operation of the molding machine in response thereto. The apparatus employs a set of photocells coupled via associated fiber optic cables to a comparator. The retention of a molded part subsequent to the completion of a molding cycle is indicated by the interruption of a light beam generated by at least one of the photocells. The optical signal is processed by the comparator and associated circuitry so as to activate a mold inhibiting relay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.