Response form security device

摘要

A response form security device is provided for use with a generally planar response form having an answer area bearing answer blanks upon which a respondent makes marks to indicate a plurality of responses. The security device includes a sleeve adapted and constructed to slidably receive and cover the response form. An access window is formed in the sleeve, and permits visual access by the respondent to a number of fewer than all of the answer areas of the response form. The length of the sleeve and the configuration of the answer window are chosen so as to prevent anyone other than the user from seeing a number of marks on the answer area sufficient to observe a repeatable pattern of marks.

主权项

1. In combination:
a) a generally planar response form having a generally flat surface with a length and width and an answer area bearing a plurality of answer blanks in a first plurality of rows spaced in a lengthwise direction upon which a respondent makes marks to indicate a response; and b) a response form security device comprising: a sleeve having a length and width, a blocking wall, sides spaced in a widthwise direction, and a top and bottom spaced in a lengthwise direction, the sleeve and response form configured so that the sleeve slidably receives the flat surface of the response form with the sleeve and response form operatively engaged wherein the lengths of the response form and sleeve are aligned and the blocking wall covers the flat surface and blocks visual access to a plurality of answer blanks that the blocking wall overlies; and an access window formed in the sleeve and through the blocking wall through which visual access by the respondent is given to less than all of the rows of answer blanks over which the access window aligns with the sleeve and response form operatively engaged, the operatively engaged sleeve and response form configured to be guidingly movable selectively lengthwise relative to each other so that visual access to different rows of answer blanks in the first plurality of rows of answer blanks is given upon which marks are made through the access window to indicate a response while the blocking wall covers a plurality of other rows of answer blanks in the first plurality of rows of answer blanks upon which a respondent makes marks, the sleeve having a length that is substantially greater than the length of the response form, the sleeve and response form configured so that the plurality of other rows of answer blanks with marks thereon that are blocked are sufficient that it is not possible to observe any repeatable pattern of marks in the other rows of answers blanks.