US Patent 9546018 Enhanced tamper-evident container

A tamper-evident container has a lid (14) that can be opened only by lifting and pulling a tab (18). Pulling of the tab breaks a breakable joint (41, 43, 70, FIG. 4) that connects the tab (18) to a hold-down (24) that is fixed to the lid, so when the tab is released from the hold-down the tab springs up (FIG. 2) to an upward incline J to indicate that the container was opened.