Flat corrugated board underlay for laying laminate flooring comprises single plates having jigsaw-like interlocking elements (recesses, protrusions) on their edges for joining with neighboring plates

摘要

Flat corrugated board underlay comprises single plates (1) having jigsaw-like interlocking elements (recesses (2), protrusions (3)) on their edges for joining with neighboring plates. An independent claim is also included for a plate made from corrugated board.