Method for producing display sign panel

Details Method for producing display sign panel Method for producing display sign panel

1976-07-26

1977-10-11

Van Horn, Charles E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

40 28C, 156102, 156219, 156252, 156292, 264156, 264293, 264321, B32B 324, B32B 326

Patent

active

040533409

ABSTRACT:
A method for producing a panel for a back-lighted display sign comprises the steps of impressing recesses about one surface of a planar sheet of rigid foam to reduce the sheet thickness in a pattern corresponding to a desired pattern of recesses. Apertures are also formed through the sheet at locations each bounded by an identical corresponding portion of each recess. The sheet of foam is then sandwiched between outer cover layers to complete the basic panel structure for a display sign having multiple recesses containing discs which are moved between bi-stable positions covering the apertues or clear of the apertures.

REFERENCES:
patent: 3078948 (1963-02-01), Gildard et al.
patent: 3082483 (1963-03-01), Bickford
patent: 3161554 (1964-12-01), Blackford
patent: 3560601 (1971-02-01), Johnson et al.
patent: 3562938 (1971-02-01), Salam
patent: 3601914 (1971-08-01), Fuller, Jr.
patent: 3659366 (1972-05-01), Woolfolk
patent: 3685040 (1972-08-01), Hart
patent: 3724110 (1973-04-01), Meyerson

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