About: http://webisa.webdatacommons.org/192137798

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	To attain this, the present invention sets forth an apparatus including a forward and rearward support roll orthogonally and rotatably mounted upon spaced rails.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com