A seat back assembly and method of manufacture is provided. The seat back includes a foam cushion layer. A support sub-assembly is formed including a rigid support layer with a plurality of cavities and channels defined on a rear surface for receiving components and a generally smooth front surface. At least one component is retained in one of the cavities and a second component is secured on the front surface of the support layer. A trim material covers the cushion layer and secures the sub-assembly to the seat back.

A seat back assembly and method of manufacture is provided. The seat back includes a foam cushion layer. A support sub-assembly is formed including a rigid support layer with a plurality of cavities and channels defined on a rear surface for receiving components and a generally smooth front surface. At least one component is retained in one of the cavities and a second component is secured on the front surface of the support layer. A trim material covers the cushion layer and secures the sub-assembly to the seat back.

A seat back assembly and method of manufacture is provided. The seat back includes a foam cushion layer. A support sub-assembly is formed including a rigid support layer with a plurality of cavities and channels defined on a rear surface for receiving components and a generally smooth front surface. At least one component is retained in one of the cavities and a second component is secured on the front surface of the support layer. A trim material covers the cushion layer and secures the sub-assembly to the seat back.

A seat back assembly and method of manufacture is provided. The seat back includes a foam cushion layer. A support sub-assembly is formed including a rigid support layer with a plurality of cavities and channels defined on a rear surface for receiving components and a generally smooth front surface. At least one component is retained in one of the cavities and a second component is secured on the front surface of the support layer. A trim material covers the cushion layer and secures the sub-assembly to the seat back.

The invention relates mold, particularly a mold for producing foam articles. In a preferred embodiment, the mold comprises a lid and a bowl releasingly engageable to define a mold cavity, the lid comprising: (i) a vent having a passageway for gas to escape from the mold cavity, and (ii) a plurality of grooves connected to the vent. The use of a plurality of grooves/slots in the mold cavity surface effectively acts as a siphon to draw gas away from the composition to be molded. The plurality of grooves/slots is connected to one or more vents which then allows for escape of the gas from the mold cavity to the exterior of the mold.