System for envelope sealing in an insertion machine

Details System for envelope sealing in an insertion machine System for envelope sealing in an insertion machine

1995-06-07

1997-09-09

Engel, James

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With work feeding or handling means

1564415, 1564421, 1564422, B05C 100

Patent

active

056651988

ABSTRACT:
An envelope sealer includes a first horizontal plate for receiving an envelope, a vacuum manifold for drawing open the envelope's downward-facing flap as it departs from the first horizontal surface, and a plow for catching the flap and directing it such that the flap travels below a second horizontal plate while the body of the envelope travels above the second horizontal plate. A fiber-optic sensor system is provided for detecting the non-presence of a flap during the travel of the envelope over the second horizontal plate and for actuating a downstream diverter in response thereto. An unseal unseal ramp is provided for lifting the flap over the plow if it is determined that the envelope should not be sealed. During the flap 's travel below the second horizontal plate, it passes and engages a wetted brush, whereby water is applied to the flap's adhesive surface. The flap is then directed upward by a ramp into a closed position, and passes through the nip of a sealer roller which compresses the envelope and flap together to form a seal. A water-contol system applies a precise amount of water to the brush in response to sensing the approach of an envelope's leading edge. The water-control system preferably includes a pressurized water tank, a water-pressure-regulator means, a water solenoid valve, a leading edge sensor, and circuit means. In response to sensing the approach of an envelope's leading edge, the circuit means causes the water solenoid valve to release a precise amount of water from the pressurized water tank to the brush. A water storage tank, pump means, and water pressure sensor cooperate with the circuit means to maintain the water pressure in the pressurized water tank within predetermined upper and lower limits.

REFERENCES:
patent: 3905325 (1975-09-01), Labore et al.
patent: 3911862 (1975-10-01), Lupkas
patent: 4050361 (1977-09-01), Traise
patent: 4924805 (1990-05-01), O'Dea
patent: 5178715 (1993-01-01), Rehberg
patent: 5242499 (1993-09-01), Bergman

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