Panel forming

Patent metadata

Field	Value
Publication number	US-2025257574-A1
Application number	US-202519070628-A
Country	US
Kind code	A1
Filing date	Mar 5, 2025
Priority date	Jul 2, 2012
Publication date	Aug 14, 2025
Grant date	—

Abstract

Building panels, especially laminated floor panels are shown, which are provided with a locking system and several core grooves at the rear side in order to save material and decrease weight. Building panels, each having a surface layer on a front side, a backing layer on a rear side and an intermediate core, wherein the intermediate core and the surface and the backing layer all comprise wood fibres and thermosetting resins, the building panels are provided with a locking system for vertical and horizontal locking of a first edge of a first building panel to an adjacent second edge of a second building panel.

First claim

1 - 3 . (canceled)

4 . Floor panels, each floor panel comprising a core,
wherein the core comprises a plastic material, wherein at least two core grooves are provided in a rear side of the floor panels with an opening towards the rear side, wherein an area of the rear side is less than about 80% of a surface area of the floor panels, and wherein the core grooves are separated by a horizontally extending space, the horizontally extending space being at least about 0.2 times a floor thickness of the floor panels.

5 . The floor panels as claimed in claim 3 , wherein the horizontally extending space is about 0.2-1.0 times the floor thickness of the floor panels.

6 . The floor panels as claimed in claim 3 , wherein the horizontally extending space is arranged in the rear side of the floor panels.

7 . The floor panels as claimed in claim 3 , wherein a core groove depth is at least 0.1 times the floor thickness of the floor panels.

8 . The floor panels as claimed in claim 7 , wherein the core groove depth is 0.1-0.5 times the floor thickness of the floor panels.

9 . The floor panels as claimed in claim 3 , wherein opposing walls of the core grooves comprise a vertically tapering portion, the vertically tapering portion extending along a longitudinal direction of the floor panels and/or along a transverse direction of the floor panels.

10 . The floor panels as claimed in claim 9 , wherein the vertically tapering portion is planar.

11 . The floor panels as claimed in claim 9 , wherein the vertically tapering portion is curved.

12 . The floor panels as claimed in claim 9 , wherein the vertically tapering portion is a vertically inner portion of the core grooves.

13 . The floor panels as claimed in claim 9 , wherein the vertically tapering portion is a vertically outer portion of the core grooves.

14 . The floor panels as claimed in claim 9 , wherein the entire opposing walls of the core grooves continuously taper from the rear side to a vertically inner portion of the core grooves.

15 . The floor panels as claimed in claim 3 , wherein at least one core groove is arranged horizontally inside of a horizontally outermost edge portion of the rear side, such that said horizontally outer edge portion provides a lower support surface.

16 . The floor panels as claimed in claim 3 , wherein the core grooves extend discontinuously along the rear side.

17 . The floor panels as claimed in claim 3 , further comprising a vertical locking system and/or a horizontal locking system for locking adjacent edges of the floor panels.

18 . The floor panels as claimed in claim 3 , wherein a groove length of the core grooves is smaller than a distance between locking systems arranged at a pair of opposite edges of the floor panels.

19 . The floor panels as claimed in claim 3 , wherein the floor panels are rectangular with long edges and short edges and wherein the core grooves are essentially parallel with the long edges.

20 . The floor panels as claimed in claim 3 , wherein the floor panels further comprise a surface layer.

21 . The floor panels as claimed in claim 20 , wherein the surface layer comprises a thermoplastic material.

22 . The floor panels as claimed in claim 3 , wherein the core comprises a thermoplastic material.

23 . The floor panels as claimed in claim 3 , wherein the core comprises a thermosetting resin.

Assignees

• Ceraloc Innovation Ab

Inventors

• Pervan Darko

Classifications

• E04F2203/08

  with a plurality of grooves or slits in the back side, to increase the flexibility or bendability of the elements · CPC title

• E04F2203/04

  comprising a plurality of internal elongated cavities arranged in substantially parallel rows · CPC title

• E04F2201/023

  with a continuous tongue or groove · CPC title

• E04F2201/0161

  with snap action of the edge connectors · CPC title

• E04F15/107 Primary

  composed of several layers, e.g. sandwich panels (layered products in general B32B; producing decorative panels or veneers B44C5/04) · CPC title