A packing machine for wrapping compressed insulation products in heat sealable plastic film, including a forming tube having product feed means to move or hold the product within it, a former to reconfigure a web of heat sealable plastic film into a longitudinally open tube around the forming tube, a...http://www.google.com.tw/patents/US5177935?utm_source=gb-gplus-share專利 US5177935 - Packing machine
