Method and apparatus for use in applying a band of liquid adhesive
AssigneeUSM Corporation
InventorRaymond Hanson
Life of this patent
Estimating the term…
Abstract
A method of applying a band of liquid adhesive in which the adhesive is spread by a resiliently flexible tapering applicator portion having an adhesive-guiding surface which extends to a narrow terminal spreading surface, the adhesive-guiding being concave about an axis which extends transversely of the spreading surface. The spreading surface is brought into contact with a workpiece, a pool of adhesive from an orifice in the adhesive-guiding surface is formed against the spreading surface, the applicator portion is caused to flex so that a portion of the adhesive-guiding surface extends along the workpiece surface, and relative movement between the workpiece and the applicator portion is brought about so that the adhesive is spread. An applicator head and an apparatus are also claimed.
Claims14
A method of applying a band of liquid adhesive to a surface of a workpiece using an applicator head comprising:
- providing a tapering applicator portion which is resiliently flexible and is provided with an adhesive-guiding surface which extends to a narrow terminal spreading surface of the applicator portion, the adhesive-guiding surface being partially cylindrical about an axis which extends transversely of the spreading surface, and an elongated orifice opening through the adhesive-guiding surface, and an extending generally parallel to the spreading surface;
- supplying liquid adhesive to the orifice so that the adhesive flows through the orifice and down the adhesive-guiding surface to the spreading portion;
- bringing the surface of the workpiece into contact with the spreading surface so that a pool of adhesive forms on the surface against the spreading portion;
- causing the applicator portion to flex so that a portion of the adhesive-guiding surface extends along the surface of the workpiece;
- and
- bringing about relative movement between the applicator portion and the surface so that the pool of adhesive is spread on the surface by the applicator portion.
An apparatus for applying a band of liquid adhesive to a surface of a workpiece comprising:
- a reservoir arranged to containing a liquid adhesive;
- a control valve operable to control flow of liquid adhesive out of the reservoir;
- and p1 an applicator head comprising a tapering applicator portion which is resiliently flexible and is provided with an adhesive-guiding surface which extends to a narrow terminal spreading surface of the applicator portion, the adhesive-guiding surface being partially cylindrical about an axis which extends transversely of the spreading surface, and an elongated orifice opening through the adhesive-guiding surface and extending generally parallel to the spreading surface, the applicator head being mounted so that the liquid adhesive leaving the control valve enters the applicator head to flow out through the orifice thereof.
Dependencies are inferred from the claim text.