Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece
Patent
1978-06-26
1980-04-15
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
264132, 264282, 264285, 264339, B29C 1702
Patent
active
041983661
ABSTRACT:
Two or more flat sheets of flexible material, at least one of which is transparent, are driven concurrently endwise along a path by successive advances at the same rate of travel while they are juxtaposed in direct face to face contact with each other. At one location along the path the sheets as a unit are pleated, heated, and pressed into a series of parallel, substantially identical flat pleats, with the pleats of each sheet interfitting corresponding pleats of the other sheet, and each pleat being partially overlapped by, and partially overlapping, those adjacent pleats of the same sheet between which it is positioned. While the sheets are held in flat pleated condition, they are cooled to set the pleats, and then are coated concurrently over the outwardly exposed face portions of their plates with light reflecting or decorative paint or flowable film forming material. The coating is then dried. The resultant pleated and coated sheets can be tensioned to open the pleats, whereupon they display coated or show portions alternating with uncoated or shade portions. The set pleats normally remain relatively flat, but they are resilient, and consequently can be opened to desired degrees by tensioning the sheets endwise. Upon release of the tensioning force, the pleats self-restore to their flat condition.
REFERENCES:
patent: 1692720 (1928-11-01), Connard
patent: 2874754 (1959-02-01), Yost et al.
patent: 3257486 (1966-06-01), Luboshez
patent: 3349159 (1967-10-01), Luboshez
patent: 4058582 (1977-11-01), Bierenbaum et al.
Leonard John H.
Lowe James B.
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