US Patent:
20150321784, Nov 12, 2015
Inventors:
Xiyan Li - Potomac MD, US
International Classification:
B65D 5/04
Abstract:
A paperboard comprises a plurality of folding lines and paper panels. The paperboard is either intact or perforated. The paperboard remains unfolded and flattened during the storage and transportation. When it is used, the paperboard is folded up and tightened into a paper tube with a polygonal cross section so that small animals are able to pass through or stay inside the tube.