Produce

Advertiser: McDonald's Corp., Oak Brook, IL
Producer: Marketing Displays International, Farmington Hills, MI
Objective: To invent a means of displaying large banners as neatly as possible (without sags, tears, etc.) while enabling fairly simple advertising updates.

Patent: 4,817,316
Issued: April 4, 1989
Inventor: Robert E. Walker, Westchester, IL
This changeable copy sign assembly is made up of several wafers, each bearing a single indicium on a relatively opaque background. The wafers and a backing strip are removably retained to a face plate of the assembly at an elongated, window-like opening, and the backing strip is composed of opaque markings for preventing the leakage of light between adjacent wafers.