Integrated envelope sealer and flip module

A single integrated module that is part of a larger modular platform and that combines wetting, flipping to a face-up orientation, and sealing of one or more envelopes received from an upstream flow of the larger modular platform, the single integrated module comprising:

• an envelope receiving area configured to receive from the upstream flow and support at least one of the envelopes in a face-down orientation with a long-edge of the envelope leading;
• a flip cage including a rigid frame mounted to one or more gears configured to rotate the flip cage about an axis, the flip cage comprising a first pair of nip rollers and a second pair of nip rollers located opposite the first pair of nip rollers, at least one of the first and second pair of nip rollers for receiving the envelope from the envelope receiving area, the flip cage for moving the envelope from a face-down orientation to a face-up orientation with the long-edge of the envelope leading;
• a moveable brush located in the envelope receiving area and configured to contact a flap of the envelope thereby to wet an adhesive on the flap along the entire length of a glue line of the flap when a body of the envelope has been received between at least one of the pairs of nip rollers;
• a curvilinear paper guide located beneath the frame and configured to bear against the flap of the envelope as the flip cage rotates about the axis;
• and
• a sealer nip positioned opposite the envelope receiving area and configured to press the flap against the body of the envelope to form a seal between the flap and the body of the envelope with an unbroken glue line, the single integrated module thus sealing the envelope and also advancing the envelope from the flip cage in the face-up orientation with the long-edge of the sealed envelope leading for downstream processing in the larger modular platform after the single integrated module.