Cutting – Operation controlled by detector means responsive to work – With plural work-sensing means
Patent
1989-08-08
1990-05-22
Yost, Frank T.
Cutting
Operation controlled by detector means responsive to work
With plural work-sensing means
53381R, 83372, 83492, 83912, 414412, B26D 538, B26D 114
Patent
active
049267299
ABSTRACT:
An envelope opener having a pair of entries in its opposite sides through which an envelope may enter the opener from either side to have its head automatically cut as it passes through the opener, comprises: cutters driven by a reversible electric motor; a lane for guiding the envelope, interrupted by the cutters; a pair of bar-type sensors swingably mounted crossing the lane, each being positioned in opposite sides of the cutters; a link connecting the sensors with each other to swing the sensors in synchronism when one is swung by an envelope passing through the lane; and contact assemblies coupled with the sensors, one of the assemblies being operated by the of the sensors to establish rotational directions of the motor and the cutters when the envelope entered the opener from either side swings one of the sensors to bring the other through the link into a position where the other of the contact assemblies coupled with the other of the sensors remains opened.
REFERENCES:
patent: 2607421 (1952-08-01), Anderson
patent: 2656889 (1953-10-01), Kaplan
patent: 2672930 (1954-03-01), Iffland
patent: 3381564 (1968-05-01), Whiteford
patent: 4419915 (1983-12-01), Oussani
Elm Industry Co., Ltd.
Peterson Kenneth E.
Yost Frank T.
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