Process for applying thermoplastic adhesive to flexible die-cut

Details Process for applying thermoplastic adhesive to flexible die-cut Process for applying thermoplastic adhesive to flexible die-cut

1983-02-07

1984-08-28

Pianalto, Bernard D.

Coating processes

Coating remains adhesive or is intended to be made adhesive

Heat sensitive adhesive

B05D 510

Patent

active

044684185

ABSTRACT:
An apparatus and process for applying thermoplastic adhesive in a dot pattern to flexible die-cut parts, such as shoe parts. The apparatus includes a tank with a removable bottom and heating elements within the removable bottom of the tank, a mixing roll, an applicator roll having a pattern of indentations over the entire surface, a primary wiper, a secondary wiper, a pressure roll and a number of stripping fingers which ride in grooves in the applicator roll. The process for applying the adhesive involves rotating the mixing roll in a quantity of molten thermoplastic adhesive, transferring the adhesive from the surface of the mixing roll to the surface of the applicator roll, filling the indentations of the applicator roll with the adhesive, wiping the excess adhesive from the outer surface and grooves of the applicator roll, passing a die-cut part between the applicator roll and pressure roll whereby the adhesive in the indentations of the applicator roll is transferred to the part and guiding the part away from the applicator roll by the stripping fingers.

REFERENCES:
patent: 2185223 (1940-01-01), Paynter
patent: 2393529 (1946-01-01), Harrigan
patent: 2417009 (1947-03-01), Miller
patent: 3364899 (1968-01-01), Von Schoppe
patent: 3389684 (1968-06-01), Talbot
patent: 3595206 (1971-07-01), Larimer
patent: 3671284 (1972-06-01), Ulrig
patent: 3752114 (1973-08-01), Knight
patent: 3762365 (1973-10-01), Herzog
patent: 3951102 (1976-04-01), Allen
patent: 3965856 (1976-06-01), Sholl et al.

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