Electrifiable-material applicator
AssigneeSociete Industrielle de Decoration et Application "Sida"
InventorRemy J. P. Bennetot
Life of this patent
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Abstract
A device for depositing an electrifiable material, e.g. cut strands, fleece, flock, upon an adhesive-coated surface comprises a vibrating sieve which is formed by a multiplicity of cylindrical parallel elements in line contact along respective generatrices and in line contact with an enclosure. In the interstices between these elements the electrifiable material passes through a grid on the bottom of this sieve which is connected to a high voltage source so that electrostatic forces assist in a transfer of the material to the adhesive. The application pattern is determined by a mask on the upper portion of the sieve and a complementary mask on a similar sieve through which excess particles are evacuated from the application region.
Claims3
An apparatus for the application of electrifiable particles such as a flock and cut fibers, to an adhesive-coated substrate in accordance with a predetermined pattern, comprising:
- a frame having vertical walls;
- a conductive grill disposed on one side of said frame and juxtaposed with said substrate for electrostatically charging particles and promoting transfer thereof to said adhesive;
- a multiplicity of elongated cylindrical elements in the form of individual tubes disposed in said frame and extending perpendicular to said substrate, said elements defining channels opening at said grill toward said substrate, said elements being in contact with one another along respective generatrices, at least some of said elements contacting said walls of said frames along generatrices of said elements;
- a mask formed with an opening corresponding to said pattern and disposed on said elements at ends thereof remote from said grill to expose channels within the opening;
- means for introducing said particles into said channels through said opening, said frame, said grill and said elements forming a distributor for said particles;
- and
- means for vibrating said distributor.
Dependencies are inferred from the claim text.