Process for preparing a web of film prior to winding it into a w

Details Process for preparing a web of film prior to winding it into a w Process for preparing a web of film prior to winding it into a w

1978-05-03

1980-01-22

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

264146, 264235, 264293, 264346, B29D 720

Patent

active

041850688

ABSTRACT:
This invention relates to a process for continuously preparing a web of thermoplastic flat film for a subsequent winding operation, by providing it with embossed lines, preferably one line along each edge or very near each edge of the web, which process comprises embossing the lines while the film web is in a thermal state in which the tensioned film may be easily embossed, and is tensioned in all directions without undergoing a stretching operation effecting a dimensional change of the film web, and then cooling the embossed web of film.

REFERENCES:
patent: 2074732 (1937-03-01), Nelson
patent: 2976567 (1961-03-01), Jones et al.
patent: 3060515 (1962-10-01), Corbett
patent: 3254148 (1966-05-01), Nichols
patent: 3261903 (1966-07-01), Carr
patent: 3502765 (1970-03-01), Spencer
patent: 3842152 (1974-10-01), Witfield et al.

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