MOISTURE APPLICATOR BRUSH FOR AN ENVELOPE SEALING SYSTEM
An improved moistening brush assembly is provided for moistening opened envelope flaps that are transported below it. Bristles of the brush are enclosed in a housing at an upper end of the brush. The bristles are supported at an inclined angle such that liquid flows from the top to the bottom. The housing further includes an opening that receives a flow of moistening liquid from a liquid supply tube and fitting. At the location where the liquid enters the housing, there is a horizontal channel extending across a majority of a width of the bristles of the moistening brush. As a result of this channel, liquid from the liquid supply opening is distributed evenly across the width of the bristles.
1 . A moistening brush assembly for moistening opened envelope flaps that are transported below a moistening brush so that adhesive on an interior side of the envelope flaps comes into contact with a lower end of the moistening brush, the moistening brush comprising:
bristles that are enclosed in a housing at an upper end of the bristles, and that are exposed at a lower end of the bristles, the bristles being supported in the housing at an inclined angle such that a liquid flows from the upper end to the lower end; and
wherein the housing includes a liquid supply opening located on a first side of the housing along a length of the bristles and proximal to the upper end of the bristles, the liquid supply opening being coupled to a liquid supply fitting that receives the liquid from a liquid supply, the housing further comprising a horizontal channel opening contiguous with the liquid supply opening, the horizontal channel opening extending across a majority of a width of the first side of the housing and the bristles of the moistening brush, and whereby the liquid entering the horizontal channel opening from the liquid supply opening is distributed evenly across the width of the bristles.
2 . The moistening brush assembly of claim 1 wherein the housing comprises:
a bristle holder that encloses the upper end of the bristles, the bristle holder having the horizontal channel opening; and
a brush mounting support having the liquid supply opening, the bristle holder being removably attached to the brush mounting support, and whereby the liquid supply opening is in contiguous connection with the horizontal channel opening when the brush mounting support and the bristle holder are attached.
3 . The moistening brush assembly of claim 2 further comprising an o-ring seal around the horizontal channel opening to prevent leaking when the bristle holder is attached to the brush mounting support.
4 . The moistening brush assembly of claim 2 wherein the brush mounting support includes an adjustable pivoting mount at its upper end so that a height of the lower end of the bristles can be adjusted to make contact with the envelope flaps.
5 . The moistening brush assembly of claim 1 wherein the lower end of the bristles is positioned over a cutout gap in a deck surface such that the bristles do not rest on any solid surface.