TODAY’S PATENT – PORTABLE PLAYPEN
The Portable playpen has a frame structure in such a way where the entire structure is collapsible and easily portable. The patent for “Portable playpen” (US4186454A) was received by Richard E. Cone on 5th February 1980 by the USPTO.
Playpens are well known and have been in use for many years. However, the prior art inventions of collapsing the wooden pen, held together by screws and nuts was a tedious job and therefore did not, in effect, make the playpens truly collapsible. Subsequently, the playpens were made by hinges but required a dismantling of the basic structure.
The objective of this invention is to provide an improved idea for a collapsible playpen which, when collapsed, requires minimal space. This playpen would be formed of a tubular structure having a lightweight flexible pen material contained therein. It also folds into a minimal four post type structure which may be secured together by a strap.