Patent ID: 7584545

Claim:
A floating sheet article thickness detecting device for use in a sheet article processing mechanism, said floating sheet article thickness detecting device comprising: two guiding slots respectively formed in two side plates of said sheet article processing mechanism; two glidable guide blocks respectively embedded into said two guiding slots to render synchronous shift actions in said guiding slots; an elastic sustaining member including a first sustaining element and a second sustaining element, which are respectively stationary and movable, arranged between said two glidable guide blocks and elastically sustained against each other, wherein said first sustaining element and said second sustaining element are separated when said sheet article passes therebetween, so that said movable second sustaining element is subject to a thickness shift to form an elastic gap between said first sustaining element and said second sustaining element, said sheet article being fed into a sheet article feeding channel through said elastic gap; and at least one thickness sensing module disposed on a surface of one of said two glidable guide blocks and in the vicinity of said second sustaining element, wherein said thickness sensing module is synchronously moved with said thickness shift of said second sustaining element according to the thickness of said sheet article, thereby generating a thickness detecting signal, wherein a mobile gap is defined between each glidable guide block and the corresponding guiding slot, such that said synchronous shift actions of said glidable guide blocks are allowable in said guiding slots when a processing operation is performed on a front edge of said sheet article transporting through said sheet article feeding channel and a rear edge of said sheet article is subject to a flapping effect, thereby alleviating the influence of said flapping effect, and enlargement of said flapping effect is limited by said guiding slots.