Coating processes – With post-treatment of coating or coating material – Solid treating member or material contacts coating
Patent
1978-11-06
1980-07-15
Lusignan, Michael R.
Coating processes
With post-treatment of coating or coating material
Solid treating member or material contacts coating
118DIG11, 118125, 425 71, 425 72R, 425 90, 425 92, 425384, 427358, 427401, B05D 312
Patent
active
042129087
ABSTRACT:
The invention relates to apparatus and a method for producing a coated film in which a cooled polymeric tubular extrudate is coated, reheated and inflated to yield an oriented, coated tubular film. The apparatus includes a coating head comprising a rotatable assembly including a support member [13] providing an orifice [14] through which the tubular extrudate may be fed, a plurality of spreading members [19] spaced-apart around the orifice, mounting means [15] for each of the spreading members operatively associated with the support member and displaceable relative thereto, and means [21] for biasing each of the spreading members into engagement with the tubular extrudate. Liquid coating medium is suitably deposited on the extrudate from a spray assembly, and the coating asembly is rotated around the extrudate thereby spreading and polishing the deposited medium to yield a uniformly coated film. The system is particularly suitable for the production of polymeric packaging films having an antistatic coating on the surface thereof.
REFERENCES:
patent: 3068516 (1962-12-01), Hofer
patent: 3819776 (1974-06-01), Robinson et al.
Ford John M.
Hendy Brian N.
Imperical Chemical Industries Limited
Lusignan Michael R.
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