A shirring blade assembly is added to a quilting machine to enable the fabrication of a shirred topmost quilting layer on an upper sleeping surface of a mattress fabricated by the machine. The various layers to be laminated into the quilted upper sleeping surface include filler and foam layers for resilience....http://www.google.com/patents/US5355816?utm_source=gb-gplus-sharePatent US5355816 - Quilting and multiple layer shirring for bedding
