linkage
A linkage is a collection of rigid rods connected by flexible joints.
A linkage is very useful if you want to change the rotary motion of an electric motor into some other kind of motion (linear, oscillating, or reciprocating)
The design of the linkage defines the exact pattern of motion produced.
In the Cadbury production lines, linkages are used during the wrapping of a Creme Egg to manipulate the egg as the wrapper is drawn around it.
