Rolling apparatus adapted to apply a rolling pressure less than its weight

Official title: Rolling apparatus adapted to apply a rolling pressure less than its weight, e.g. roller finishers travelling on formrail {combined with spread-out, strike-off or smoothing means; Rolling elements with controlled penetration or a controlled path of movement in a vertical plane, e.g. controlled by the formrails, by guides ensuring a desired configuration of the rolled surface}

E01C19/29 (Rolling apparatus adapted to apply a rolling pressure less than its weight) appears on 39 US grants and 24 published applications in this corpus.