Patent ID: 7926359

Claim:
A test device for testing an object for sufficient stiffness, comprising: a holder device holds an object extending in an object plane, the holder device holds the object so that the object is held flat in a holding subsurface of the object plane and is movable at right angles to the object plane in a movement area outside the holding subsurface, a force exertion device exerts a force on the held object such that the exerted force includes a force component at right angles to the object plane, the force exertion device includes a fan to exert the force by generating a flow of a fluid hitting the movement area; a drive moves the object held by the holder device relative to the force exertion direction; and a measuring device tests when the force produced by the force exertion device causes the movement area of the object to be deflected by a distance at right angles to the object plane that is greater than a predetermined limit, wherein when the deflection is greater than the predetermined limit the object does not possess a sufficient stiffness; wherein the measuring device includes a light barrier arranged so that the movement area of the object interrupts a light beam of the light barrier when the movement area is deflected by a distance at right angles to the object plane which is greater than the predetermined limit, wherein the holder device transports the object in a direction of transport that lies in the object plane, and wherein the distance between the object plane and the light beam emitted by the light barrier is equal to the predetermined limit.