Method and apparatus for manufacturing signs or the like carryin

Details Method and apparatus for manufacturing signs or the like carryin Method and apparatus for manufacturing signs or the like carryin

1979-02-08

1981-03-10

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Corrugating

40453, 264509, 264510, 264132, 425388, B29C 1704, G09F 1914

Patent

active

042553806

ABSTRACT:
A sign is fabricated which presents different messages depending on the angle of view. The fabricated sign has walls, different sides having parts of different messages. The method of fabrication includes taking at least two images, cutting them into strips of equal width and combining successive strips alternatively from the two images in order to form a third image, which is printed on a plastic sheet. This sheet is laid upon a wave-formed mold surface so that the tops of the waves coincide with the borders between the strips. The plastic sheet is softened and stretch-deformed, e.g., by vacuum deformation, while the borders are held against movement into the form of the waved mold surface.

REFERENCES:
patent: 829492 (1906-08-01), Spiegel
patent: 990490 (1911-04-01), Miller
patent: 2889651 (1959-06-01), Baldanza
patent: 3060611 (1962-10-01), D'Andrea
patent: 3061881 (1962-11-01), Sherno
patent: 3107396 (1963-10-01), Fowler, Jr. et al.
patent: 3406476 (1968-10-01), Wilcox
patent: 3749471 (1973-07-01), Mallard
R. F. McTier, "Distortion Printing and Vacuum Forming of Thermoplastic Sheet", SPE Journal, 7-1962, pp. 741-745.

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