Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-01-26
1989-07-25
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
271258, G01N 904
Patent
active
048516635
ABSTRACT:
An apparatus for monitoring letter closing devices in mail handling machines in mail handling lines includes transport rollers receiving envelopes. A holding-down device is downstream of the transport rollers in envelope transport direction. A plow plate is downstream of the holding-down device. A deflector is disposed between the holding-down defice and the plow plate. A closing device is downstream of the plow plate. A relection light gate is disposed underneath the plow plate. The plow plate has a reflecting surface forming part of the reflection light gate.
REFERENCES:
patent: 4113105 (1978-09-01), DeHart et al.
patent: 4362100 (1982-12-01), Wu et al.
patent: 4691100 (1987-09-01), Kizu et al.
Denzin Horst
Rehberg Heinz
Francotyp-Postalia GmbH
Greenberg Laurence A.
Lerner Herbert L.
Nelms David C.
Shami Khaled
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