Spray gumming unit
AssigneeG.D S.p.A.
InventorsSilvano Boriani, Alver Tacchi, Alessandro Minarelli
Life of this patent
Estimating the term…
Abstract
In a spray gumming unit, a gumming device is equipped with an ejector that sprays an adhesive substance and that is connected with a shutter element. The shutter element moves towards and away from the ejector between a position where it closes the ejector and in which a pad, fixed to one end of it, is in contact with the ejector, and a position where the ejector is left open. During the movement of the shutter element and of the pad between the ejector open and closed positions, an applicator applies an antiadhesive liquid substance on the pad.
Claims17
A spray gumming unit having at least one spray gummer with a gumming nozzle equipped with an adhesive ejector;
- the unit also having shutter means designed to keep the ejector closed during stops in gumming operations, said shutter means moving towards and away from the ejector, during such stops, between an open position and a closed position of the ejector;
- and drive means for moving the shutter means between such open and closed positions;
- the gumming unit comprising applicator means for applying an anti-adhesive liquid substance on a working portion of the shutter means as the shutter means moves between the open and closed positions;
- the applicator means comprising means for feeding the anti-adhesive liquid substance and metering means;
- said metering means being connected with the feeding means and comprising a ball for metering and applying the anti-adhesive liquid substance, the metering means constructed and arranged so that the ball automatically contacts the working portion of the shutter means as the shutter means moves between the open and closed positions to apply a thin film of the anti-adhesive substance to the working portion of the shutter means.
Dependencies are inferred from the claim text.