Industrial machine for applying temporary or permanent protective films to planar surfaces acting simultaneously on two faces, having a system for cutting the film and positioning edge-to-edge or with a margin, automatically adapting to suit changes in the parts that are to be treated, using an electrostatic method

An industrial machine for applying temporary or permanent protective films on plane surfaces of a product to be protected, the plane surfaces being perpendicular to a horizontal plane, the industrial machine having an automatic system for cutting the film, positioning the film edge-to-edge or with a margin on the product and acting simultaneously on both front and rear faces of the product and adapting automatically to changes in a format of the product for treatment, using an electrostatic charge method for positioning and holding the film in position on rollers, the industrial machine further comprising:

• an assembly provided with a system for conveying and positioning the product;
• two film-coating modules placed on linear guides for moving the two film-coating modules vertically and horizontally, one of the film-coating modules being a front face film-coating module for coating the front face of the product, the other of the two film-coating modules being a rear face film-coating module for coating the rear face of the product;
• wherein each of the two film-coating modules comprises:
• a) an applicator roller that coats the film onto the product;
• b) an electrostatic charge bar (m) connected to a charge generator and positioned at a distance from the applicator roller (l), enabling the film to adhere to the applicator roller (l) while conserving a position thereof accurately;
• and
• c) a cutter module (n) for cutting the film in contact with the applicator roller (l) when the product is positioned with a rear edge thereof at a distance vertically from an axis of the applicator roller (l) on a substrate side of the product that is equivalent to a distance between a bottom axis of the applicator roller (l) and a cutting point plus a portion of the product that is to remain without film coating;
• and
• a controller having a program for controlling the two film-coating modules as a function of dimensions of the product.