Methods and systems for no-glue pocketed spring unit construction. Rows of pocketed springs, preferably arranged into modules of more than two pocketed springs surrounding a central hole, are ultrasonically welded together when paired vibrating probes and anvils press layers of pocketed spring fabric from the rows of pocketed springs together and a welding pulse is transmitted to the vibrating probe.

A foam core (12) for a cushion (8, 9) of a seat part (2) or a reclining part or a back rest (3) of a piece of upholstered furniture (1) or a motor vehicle seat (11) or for a mattress or support surface of a piece of reclining furniture, with a core base (13) of foam material, in particular of cold foam, visco foam, latex foam or molded foam, there being in the core base (13) a plurality of spring strips (14) which run preferably at least essentially parallel to one another. It is provided that at least one spring strip (14) has an in particular pultruded fiber core (20) which has preferably glass fibers, and a mantle (21) of a thermoplastic material, in particular of polypropylene, which surrounds the fiber core (20).

A foam core (12) for a cushion (8, 9) of a seat part (2) or a reclining part or a back rest (3) of a piece of upholstered furniture (1) or a motor vehicle seat (11) or for a mattress or support surface of a piece of reclining furniture, with a core base (13) of foam material, in particular of cold foam, visco foam, latex foam or molded foam, there being in the core base (13) a plurality of spring strips (14) which run preferably at least essentially parallel to one another. It is provided that at least one spring strip (14) has an in particular pultruded fiber core (20) which has preferably glass fibers, and a mantle (21) of a thermoplastic material, in particular of polypropylene, which surrounds the fiber core (20).

A cover (8) for a mattress (6) or a cushion (3) of a piece of furniture (1) with a utilized side (10) and a back side (11), wherein on the back side (11) there is a receiving device for bottom spring cushioning (12) which has spring strips (15), wherein at least one spring strip (15) is made of a fiber-reinforced plastic material with a preferably pultruded fiber core (16) and a plastic jacket (17) which surrounds the fiber core (16). It is provided that on opposite sides of the jacket (17) one jacket side (18) at a time sticks out for an enlarged support surface of the spring strip (15).

A cover (8) for a mattress (6) or a cushion (3) of a piece of furniture (1) with a utilized side (10) and a back side (11), wherein on the back side (11) there is a receiving device for bottom spring cushioning (12) which has spring strips (15), wherein at least one spring strip (15) is made of a fiber-reinforced plastic material with a preferably pultruded fiber core (16) and a plastic jacket (17) which surrounds the fiber core (16). It is provided that on opposite sides of the jacket (17) one jacket side (18) at a time sticks out for an enlarged support surface of the spring strip (15).

Methods and systems for no-glue pocketed spring unit construction. Rows of pocketed springs, preferably arranged into modules of more than two pocketed springs surrounding a central hole, are ultrasonically welded together when paired vibrating probes and anvils press layers of pocketed spring fabric from the rows of pocketed springs together and a welding pulse is transmitted to the vibrating probe.

A foam core (12) for a cushion (8, 9) of a seat part (2) or a reclining part or a back rest (3) of a piece of upholstered furniture (1) or a motor vehicle seat (11) or for a mattress or support surface of a piece of reclining furniture, with a core base (13) of foam material, in particular of cold foam, visco foam, latex foam or molded foam, there being in the core base (13) a plurality of spring strips (14) which run preferably at least essentially parallel to one another. It is provided that at least one spring strip (14) has an in particular pultruded fiber core (20) which has preferably glass fibers, and a mantle (21) of a thermoplastic material, in particular of polypropylene, which surrounds the fiber core (20).

A foam core (12) for a cushion (8, 9) of a seat part (2) or a reclining part or a back rest (3) of a piece of upholstered furniture (1) or a motor vehicle seat (11) or for a mattress or support surface of a piece of reclining furniture, with a core base (13) of foam material, in particular of cold foam, visco foam, latex foam or molded foam, there being in the core base (13) a plurality of spring strips (14) which run preferably at least essentially parallel to one another. It is provided that at least one spring strip (14) has an in particular pultruded fiber core (20) which has preferably glass fibers, and a mantle (21) of a thermoplastic material, in particular of polypropylene, which surrounds the fiber core (20).

A cover (8) for a mattress (6) or a cushion (3) of a piece of furniture (1) with a utilized side (10) and a back side (11), wherein on the back side (11) there is a receiving device for bottom spring cushioning (12) which has spring strips (15), wherein at least one spring strip (15) is made of a fiber-reinforced plastic material with a preferably pultruded fiber core (16) and a plastic jacket (17) which surrounds the fiber core (16). It is provided that on opposite sides of the jacket (17) one jacket side (18) at a time sticks out for an enlarged support surface of the spring strip (15).

A pressure control layer (1) for use in a mattress or in a cushion for a seat. The layer (1) includes a plurality of interconnected fabric pockets (11) each enclosing at least one spring member (13). The fabric pockets (11) are made from elastic material. The pressure control layer (1) also has upper and lower fabric sheath portions (5,7), and each fabric pocket (11) has at least one elongate seam (9) formed between the upper and lower fabric sheath portions (5,7), these elongate seams (9) interconnecting and defining the periphery of the fabric pockets (11).