Xerographic method for making a responsive answer system
AssigneeXerox Corporation
InventorsStephen F. Royka, Robert G. Martin
Life of this patent
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Abstract
Permanent, meaningful information is so associated with removable, confusing information, at least some of which is usually similar in character to said permanent, meaningful information, as to make it effectively impossible for an observer to discriminate between the two types of information even though both types of information in the association may be legible. Such a system is advantageously used in instructional systems and particularly in responsive answer formats.
Claims6
A xerographic method for making a device for selectively indicating information characterized by having simultaneously legible meaningful permanent information and legible confusing removable information displayed on a surface within a response area, said method comprising the steps of:
- a. printing said legible meaningful permanent information on said surface within said response area;
- and
- b. xerographically printing said legible confusing removable information on said surface within said response area by forming a latent electrostatic image, corresponding to said legible confusing removable information, on a xerographic plate, developing said latent image with toner, transferring at least part of said toner image to said surface, and fixing said toner image to said surface, said fixing being to a greater than class 1 but less than class 3 fix.
Dependencies are inferred from the claim text.