VA069 Combi Tongue
Publication Date: 2011-Sep-13
The IP.com Prior Art Database
AbstractBuilding panels, especially floor panels are shown, which are provided with a vertical locking system on adjacent edges comprising a displaceable tongue that has a main tongue body and separate spring parts attached to the body.
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MECHANICAL LOCKING SYSTEM FOR FLOOR PANELS
The disclosure generally relates to the field of
mechanical locking systems for floor panels and building
panels. The disclosure shows floorboards, locking
systems, installation methods and production methods.
FIELD OF APPLICATION OF THE INVENTION
The present invention is particularly suitable for use in
floating floors, which are formed of floor panels which
are joined mechanically with a locking system integrated
with the floor panel, i.e. mounted at the factory, are
made up of one or more upper layers of wood or wood
veneer, decorative laminate, powder based surfaces or
decorative plastic material, an intermediate core of
wood-fibre-based material or plastic material and
preferably a lower balancing layer on the rear side of
the core. Floor panels with a surface layer of cork,
linoleum, rubber or soft wear layers, for instance needle
felt glued to a board, printed and preferably also var-
nished surface and floors with hard surfaces such as
stone, tile and similar materials are included. The
invention can also be used for joining building panels
which preferably contain a board material for instance
wall panels, ceilings, furniture components and similar.
The following description of prior-art technique,
problems of known systems and objects and features of the
invention will therefore, as a non-restrictive example,
be aimed above all at this field of application and in
particular at panels formed as rectangular floor panels
with long and shorts edges intended to be mechanically
joined to each other on both long and short edges.
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The long and short edges are mainly used to simplify the
description of the invention. The panels may be square.
The invention is preferably used on the short edges. It
should be emphasised that the invention can be used in
any floor panel and it may be combined with all types of
known locking system formed on the long edges, where the
floor panels are intended to be joined using a mechanical
locking system connecting the panels in the horizontal
and vertical directions on at least two adjacent sides.
BACKGROUND OF THE INVENTION
Laminate flooring usually consists of a core of a 6-12 mm
fibre board, a 0.2-0.8 mm thick upper decorative surface
layer of laminate and a 0.1-0.6 mm thick lower balancing
layer of laminate, plastic, paper or like material. A
laminate surface consists of melamine-impregnated paper.
The most common core material is fibreboard with high
density and good stability usually called HDF - High
Density Fibreboard. Sometimes also MDF - Medium Density
Fibreboard - is used as core.
Traditional laminate floor panels of this type have been
joined by means of glued tongue-and-groove joints.
In addition to such traditional floors, floor panels have
been developed which do not require the use of glue and
instead are joined mechanically by means of so-called
mechanical locking systems. These systems comprise
locking means, which...