Patent ID: 7717421

Claim:
A system for sensing a media stack in order to detect a given height of the stack, said system comprising: a media sheet stack site; and a media contact member movably mounted adjacent to a side of said media sheet stack site in a predetermined state at a home position such that a contact element of said media contact member extends into a path of delivery of a media sheet to said stack site where said contact element is exposed to being struck by an edge of media sheets repetitively moving in said delivery path that causes said media contact member to repetitively movably deflect from said home position to a displaced position allowing each media sheet to repetitively pass said contact element of said media contact member and reach said stack site increasing the height of a stack of media sheets at said stack site, said predetermined state further causing said media contact member to repetitively movably return from said displaced position to said home position after each repetitive media sheet has passed said contact element of said media contact member until the given height of the media stack is reached at which said media contact member cannot return to said home position due to said contact element of said media contact member being unable to extend into said delivery path of the media sheet due to the presence of the media stack.